BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:TOWARDS ESTABLISHING SCIENTIFICALLY VALID PROOFS FOR MYTHOLOGICAL COSMOLOGY DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2254@events.saip.org.za DESCRIPTION:Speakers: Bamidele Oluwade (Principal Consultant/CEO\, Dewade Systems Consult\, and Department of Mathematical Sciences\, Faculty of Nat ural Sciences\, Kogi State University\, Nigeria)\nEXTENDED ABSTRACT\n(Gene ral) cosmology (GC) - the scientific study of the origin\, evolution and e ventual consequence of the universe – may be broadly and conveniently cl assified into two major parts. These are physical cosmology (PC) and mytho logical cosmology (MC) (otherwise known as religious mythology) (Peebles\, 1993\; https://en.wikipedia.org/wiki). There is no doubt that worldwide r esearch on cosmology has been almost totally concentrated on PC thus makin g many to perceive it as synonymous to GC\, to the exclusion of MC (e.g. s ee Hawking and Penrose\, 1996\; Greene\, 2000\; Greene\, 2005). There is n o doubt that significant results on PC have been arrived at by contemporar y cosmologists. As fundamental as the results of these great scientists ar e\, the results are incomplete in describing the entire universe. This is due to the fact that substantial phenomena in the universe\, which are hit herto called mystical\, may only be explained and formally proved via inte nse research on MC. This aligns with the views of some physicists such as McKee (2004) who canvassed for intense research in MC to explain gaps in t he present state of cosmological knowledge. \nThat is\, conventional PC is limited in terms of scope\, method of proof etc. PC focuses on the study of the material manifestation of the universe\, with consideration given t o motion of planetary objects. For instance\, the big bang theory postulat es the concept of the expansion (i.e. motion) of the universe via explosio n about 15 billion years ago from an unimaginably energetic initial event (Rees\, 1998\; Khoury et. al.\, 2002\; Tolley and Turok\, 2002\; Nature\, 2019). As a result\, methods of proof in PC rely on the traditional areas of applied mathematics\, which essentially relate to fluid and solid mecha nics. Earlier works on PC include Steinhardt and Turok (2002A\; 2002B\; 20 05\; 2006) where the authors advanced a radically new (physical) cosmology \, called cyclic universe\, in which the universe does not have a beginnin g or end (Also see Khoury et. al.\, 2004\; Strege\, 2010). They contended that what is known as creation is just a part of an infinite cycle of tita nic collisions between our universe and a parallel world. Rees (1998) advo cated that an infinite family of universes (called baby universes) may eac h have been created by its own big bang such that each universe acquires a distinctive imprint and its own laws of physics. In Hawking and Mlodinow (2010)\, the authors\, among others\, argued that both the theory of quant um mechanics and the theory of relativity assist in understanding how univ erses could have formed out of nothing. Peebles (1980) proposed the theor y of cosmic structure formation.\nThe goal of the present author’s ongoi ng research on MC as reported in the present paper is two-fold viz: (i) P rovide scientifically acceptable proofs of the validity (or otherwise) of phenomena that are considered metaphysical (ii) Provide a unified cosmic theory which effectively integrates PC with MC. In accomplishing the above \, a simplistic view in which existing metaphysical phenomena are consider ed equivalent to what is hitherto classified as science fiction\, is adopt ed. It is well-known that many science fictions have now been scientifical ly realized. Classical examples of such are aircraft and drones/robots (Ol uwade\, 2020). Also\, many acts performed by people known as magicians\, which in the past appeared to the laymen to be beyond the physical have in contemporary times being revealed as mere manipulation and distortion of known physical principles e.g. see Den (2012). Some of these phenomena are sometimes described as ‘African Science’. In addition\, with advances in technology\, including machine learning and artificial intelligence\, many phenomena which could have been considered scientifically impossible are now made possible. For instance\, in the movie/video industry\, it is possible to watch the (recorded) video – with exact shape\, voice etc - of a clinically dead person. Also\, it is possible for a person who is phy sically present at a particular coordinate position to be invisible to ano ther person who is close by. Furthermore\, the interesting case of the hyp othetical quantum computers which are now practically being realized is re levant (Feynman\, 1982\; Oluwade\, 2002).\nThe author’s ongoing effort i n establishing non-trivial scientifically valid proofs for mythological c osmological phenomena is generally premised on the following principles in physics and (mathematical) philosophy\, namely (McKee\, 2004\; Hospers\, 1953\; Russell\, 1961):\n(i) The wave-particle duality: By the author ’s model\, the wave phenomena represent the spiritual/metaphysical part of the universe while the particle aspect represents the physical part of the universe.\n(ii) Action-reaction duality: This means that for every spiritual/metaphysical manifestation\, there is a corresponding physical m anifestation\, and vice versa. Thus\, a fundamental knowledge about metaph ysical phenomena gives insight into physical phenomena\, and vice versa.\n (iii) Cause-effect duality: This emphasizes\, for instance\, that every effect of a physical event has a cause\, and by investigating the effect\ , one tends to have insight into the cause. The author’s conjecture\, wh ich he is working on\, is that every physical effect has a cause which can be traced to the metaphysical realm.\nIn particular\, the author’s rese arch activities involve the integration of PC and MC towards a new grand c osmic unification theory. The major instrument of mathematics used is mode ling\, whereby metaphysical phenomena are reduced to mathematical relation ships. Formal proofs or otherwise of the validity of these phenomena are t hen established on a case by case basis. However\, unlike PC - whose natur e of research revolves round dynamical systems\, fluid mechanics\, heat an d mass transfer vis-à-vis the study of motion of heavenly bodies - MC use s distinct mathematical methods. Such methods are naturally drawn from are as like Abstract Algebra\, Real/Complex Analysis and Fuzzy Logic/Set. Thes e are part of the rich repertoire of acceptable standard methods of proofs in mathematics\, notable among which are method of deduction\, proof by c ontradiction\, use of a counterexample\, proof by hypothesis and mathemati cal induction (Oluwade\, 2006). Essentially\, full deployment of mathemati cs as a revealer\, harbinger and purveyor of ‘truth and beauty’ (Russe ll\, 1919) is being pursued. The mathematical methods are then supported w ith scientific and thought experiments.\nPrevious works of the author rela ting to MC include Oluwade (2001) where the well-known general communicati on system of coding and information theory is used to model metaphysics. T hat is\, a metaphysical phenomenon is modeled as a 6-constituent process\, namely Source\, Transmitter (or Encoder)\, Channel\, Noise\, Receiver (or Decoder) and Destination. The paper is a poster presentation at the 2001 Forum and Annual Meeting of The Sigma Xi\, The Scientific Research Society \, USA. Although the author was originally invited as an international gue st speaker (on Science and Engineering Policy and Development in Developin g Countries\, with emphasis on Nigeria)\, he used the opportunity to also make a poster presentation on MC. In Oluwade and Longe (2003)\, the author s established parallels between the conventional computer binary codes and Ifa Divination codes. Ifa Divination is an ancient mythological practice of the traditional Yoruba people of South Western Nigeria which is still p opular in contemporary times. The authors showed that\, just like the norm al computer binary codes\, Ifa Divination codes may be conveniently as a d iscrete structure. Thus\, new characteristics of the Ifa Divination codes were deduced. In furtherance to the above\, Oluwade (2019) remarked that t here is an appearance of similarity pattern in a major device used for pra cticing African Traditional Religion (Ifa divination)\, Christianity (spec ifically\, Catholicism) and Islam. This is a bead-like device which is res pectively known as divining chain (whose local name is opele)\, rosary and tesbih. Thus\, results earlier arrived at on Ifa Divination may\, to some extent\, be extended to the analysis of the practice of Christianity and Islam\, and indeed other mythologies which use beads as a medium of metaph ysical communication. In particular\, a theory of similarity pattern in Ab stract Algebra (otherwise known as theory of equivalence relations)\, is a n important tool being used by the present author in his research on MC.\n In Oluwade (2011)\, the authors presented a general model of all existing human languages (from the beginning of human existence in the universe) as computer coded character sets\, particularly as subsets of Unicode. The m odel is a framework for designing a new coded character set which is an ex tension of the Unicode. Oluwade (2020) presents a critical review of a boo k (McKee\, 2004) written by a professional physicist on fundamental scienc e discoveries with predictions for the future. The book is on progress mad e in modern physics (quantum mechanics\, relativity etc) in relation to ot her areas of science such as neuroscience\, nanoscience and computer scien ce (with respect to quantum computers). Among others\, the book author arg ued for a new science of consciousness which will incorporate not only the conventional natural sciences\, but also metaphysics\, including proof of a ‘Supreme Observer’. The book also relates to discoveries and projec tions in PC. In a recent paper\, Oluwade et. al. (2020) modeled human lang uages as computer coded character sets. These are sets through which data are processed as sequences of 0’s and 1’s in the computer (Oluwade\, 2 004). As a preliminary effort in the paper\, the authors presented some ma thematical proofs which tend to trace or deduce the (primary) language spo ken by the first set of humans on earth. This is done via the family of la nguages which the primary language belongs to.\nIn conclusion\, this prese ntation highlights the author’s ongoing research in presenting a holisti c description of the universe by capturing all known and possible phenomen a which are physical and metaphysical. In essence\, the research is an eff ort to blend mythological cosmology (MC) with physical cosmology (PC)\, si nce in the view of the author\, both are complementary and not supplementa ry. The modus operandi is the deployment of non-trivial mathematical princ iples in establishing proofs for MC and justifying a link between the two categories of cosmology. The author is encouraged in his research by notin g the fact that as recent as about five decades ago\, PC was regarded as a dead end field of study. The field has however recorded monumental succes s in the present times. Apart from mathematics\, physics\, computer scienc e and philosophy\, other knowledge areas whose results are being deployed in the author’s research include parapsychology\, theology\, philosophy\ , paleontology and archaeology (Onabamiro\, 1980). Ultimately\, it is expe cted that the veracity of metaphysical phenomena will be less controversia l and substantially validated and accepted in mainstream science\, in line with the wish of notable scientists like James (1986).\nKeywords: Mytholo gical cosmology\, Physical cosmology\, Scientific proofs\, Metaphysics\, M athematical model\n REFERENCES\n1. Den\, Vlog (2012) \, Magic’s Biggest Secrets Finally Revealed\, YouTube. https://www.youtu be.com/watch?v=JT4YFHB-mvc \n2. Feynman\, R. P. (1982)\, ‘Simulating Physics with Computers’\, International Journal of Theoretical Physics\, 21\, p. 467.\n3. Greene\, Brian (2000)\, The Elegant Universe: Superst rings\, Hidden Dimensions\, and the Quest for the Ultimate Theory\, Vintag e Series\, Random House Inc.\n\n4. Greene\, Brian (2005)\, The Fabric o f the Cosmos: Space\, Time and the Texture of Reality\, Vintage.\n5. Ha wking\, Stephen and Penrose\, Roger (1996)\, The Nature of Space and Time\ , Princeton University Press.\n6. Hawking\, Stephen and Mlodinow\, Leon ard (2010)\, The Grand Design\, Bantam Books.\n7. Hospers\, John (1953) \, An Introduction to Philosophical Analysis (1953)\, Routledge.\n8. Ja mes\, William (1986)\, Essays in Psychical Research\, Harvard University P ress.\n9. Khoury\, J.\; Ovrut\, B. A.\; Seiberg\, N. P.\; Steinhardt\, J.\; and Turok\, N. (2002)\, ‘From Big Crunch to Big Bang’\, Physical Review D65\, 086007.\n10. Khoury\, J.\; Steinhardt\, P. J.\; and Turok\ , N. (2004)\, ‘Designing Cyclic Universe Models’\, Physical Review Let ters 92\, 2004\, 031302\n11. McKee\, John W. (2004)\, New Horizons in S cience (From the Meaning of Spin to the Nature of Consciousness)\, Profess ional Press\, Chapel Hill\, USA.\n12. Nature (editorial) (2019)\, ‘Bi g Bang Theory’\, Nature Physics 15\, 1103. https://www.nature.com/articl es/s41567-019-0720-4 \n13. Oluwade\, Bamidele (2001)\, ‘A Metaphysica l Model of the General Communication System’\, poster presentation at th e 2001 Annual Meeting and Research Forum of Sigma Xi\, The Scientific Rese arch Society\, held at the Sheraton Capital Centre\, Raleigh\, USA.\n14. Oluwade\, Bamidele (2002)\, Design\, Analysis and Uses of Classical and Quantum Computer Codes\, Conversion Project Report\, M.Phil/PhD to PhD Deg ree in Computer Science\, University of Ibadan\, Ibadan\, Nigeria.\n15. Oluwade\, ‘Dele (Bamidele) and Longe\, Olu (2003)\, ‘On the Code Char acteristics of the Ifa Divination Codes’\, The Journal of Computer Scien ce and Its Applications (Journal of the Nigeria Computer Society)\, Vol. 9 \, No. 1\, pp. 23 -28. https://www.academia.edu/37270132/On_the_Code_Chara cteristics_of_the_Ifa_Divination_Codes .\n16. Oluwade\, Bamidele (2004) \, Design and Analysis of Computer-Coded Character Sets\, PhD Thesis\, Uni versity of Ibadan\, Nigeria.\n17. Oluwade\, Bamidele (‘Dele) (2006)\, ‘There is Truth and Beauty in Undergraduate Mathematics Research’(edi torial)\, American Journal of Undergraduate Research\, Vol. 2\, No. 4\, pp . v-vi. www.ajuronline.org/uploads/Volume 2/Issue 4/24A-OluwadeEditorial.p df .\n18. Oluwade\, Bamidele (2011)\, ‘Design of a Byte-based Coded C haracter Set’\, The Journal of Computer Science and Its Application (An International Journal of the Nigeria Computer Society)\, Vol. 18\, No. 2\, pp. 42 – 54. https://researchgate.net/publication/327160707_DESIGN_OF_A _BYTE-BASED_CODED_CHARACTER_SET \n19. Oluwade\, Bamidele (2019)\, ‘Ma nagement Meets Theology: Reflections on the Contribution of Nigerian Unive rsity Intellectuals to Management Development via Theology’\, African Jo urnal of Management Information System\, Vol. 1\, Issue 3\, pp. 57-75\; h ttps://afrjmis.files.wordpress.com/2019/08/vol1issue3jul19paper5journalfor matpagenumb.pdf \n20. Oluwade\, Bamidele\; Osofisan\, Adenike\; Ilori\, S. A\; Shola\, P. B. and Akin-Ojo\, R. (2020)\, ‘A Computational Model for Studying the Characteristics of Languages using Coded Character Sets ’\, University of Ibadan Journal of Science and Logics in ICT Research ( Journal of the Department of Computer Science\, University of Ibadan\, Nig eria)\, Vol. 4\, No. 1\, 85-95. https://journals.ui.edu.ng/index.php/uijsl ictr/article/view/83/65 \n21. Oluwade\, Bamidele (2020)\, ‘Review of a Book on Fundamental Science Discoveries and Predictions as Authored by J ohn W. McKee (1926 – 2009)\, African Journal of Management Information S ystem\, Vol. 3\, Issue 2\, pp. 1-11. https://afrjmis.wordpress.com/2020/1 0/jmisvol23paper1pagenumb.pdf \n22. Onabamiro\, Sanya (1980)\, Philosop hical Essays\, Evans Brothers Nig Ltd.\n23. Peebles\, P. J. E. (1980)\, The Large-Scale Structure of the Universe\, Princeton University Press.\n 24. Peebles\, P. J. E. (1993)\, Principles of Physical Cosmology\, Prin ceton University Press.\n25. Rees\, Martin (1998)\, Before the Beginnin g: Our Universe and Others\, Basic Books.\n26. Russell\, Bertrand (1919 )\, Mysticism and Logic and other Essays\, Longman.\n27. Russell\, Bert rand (1961)\, The Basic Writings of Bertrand Russell (1961)\, George Allen & Unwin Ltd.\n28. Steinhardt\, P. J. and Turok\, N. (2002A)\, ‘A Cyc lic Model of the Universe’\, Science\, May\, 1436.\n29. Steinhardt\, P. J. and Turok\, N. (2002B)\, ‘Cosmic Evolution in a Cyclic Universe’ \, Physical Review D65\, 126003.\n30. Steinhardt\, P. J. and Turok\, N. (2005)\, ‘The Cyclic Model Simplified’\, New Astronomy Reviews 49\, 4 3\n31. Steinhardt\, Paul J. and Turok\, Neil (2006)\, Endless Universe: Beyond the Big Bang – Rewriting Cosmic History\, Onion Publishing Group Limited.\n32. Strege\, Charlotte (2010)\, A Comparison of Two Cosmolog ical Models: Inflationary Cosmology and the Cyclic Universe\, Master of Sc ience Thesis\, Imperial College\, London.\n33. Tolley\, A. J. and Turok \, N. (2002)\, ‘Quantum Fields in a Big Crunch/Big Bang Spacetime’\, P hysical Review D66\, 2002\, 106005\n34. https://en.wikipedia.org/wiki\n \nhttps://events.saip.org.za/event/211/contributions/2254/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2254/ END:VEVENT BEGIN:VEVENT SUMMARY:Influence of side-groups on the non-equilibrium dynamics of semi-c rystalline polymer films DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2255@events.saip.org.za DESCRIPTION:Speakers: Austine Amukayia Mulama (Maseno University)\nCombini ng different polymers lead to a wide range of phase behavior. At rapid pro cessing conditions (during preparation or flow)\, polymers are squeezed/de formed at various length scales and exhibit significantly different proper ties. The extent of deformation and the variation in properties depend on how the polymer responds to such rapid processing conditions and is relate d to the molecular details of the polymer. Molecular architecture\, compos ition\, and molecular size control polymer–polymer phase characteristics .Binary mixtures and diblock copolymers exhibiting macrophase separation a nd microphase segregation are concepts that are fairly well understood at the moment. The study uses dewetting experiments on non–equilibrium semi –crystalline polymer films to investigate the inter-relationship of stru cture and visco-elastic behavior. At higher dewetting temperatures\, it is worth investigating why isotactic poly(para-methylstyrene) (iPpMS) films have exhibited a decrease in dewetting velocity with increase in temperatu re.\n\nhttps://events.saip.org.za/event/211/contributions/2255/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2255/ END:VEVENT BEGIN:VEVENT SUMMARY:Rheological behaviour of residues in dry anaerobic digestion perfo rmed by Vane geometry DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2256@events.saip.org.za DESCRIPTION:Speakers: Etienne Yves-Martial BEUGRE (University of Strasbour g)\nThe knowledge of the rheology of residues involved in dry digestion is an essential factor for process optimization. Despite this fact\, it is d ifficult to characterize the rheological behaviour of these residues with high total solid (TS) content. Indeed\, the standard methods of rheologica l measurements are poorly adapted to these residues because of the sliding effects observed during the measurements. In this study\, we used a non-s tandard method\, the Vane geometry\, for its particularity to limit the sl iding effects. Two types of measurements were carried out on potato residu es of 18 to 35% TS\, extracted from the digesters. The first measurement w as to submit to the sample a rising shear velocity ramp from 0 to 200 s-1 at 37°C and 55°C. The results of these measurements show a good correlat ion between the rheograms and Herschel-Bulkley model and we deduced a rheo fluidifying threshold behaviour. The second measurement was performed in o scillations at 10 Hz at 25°C\, 37°C and 55°C. The results show differen t evolutions of the elastic G’ and viscous G’’ modulus as a function of temperature. There is a crossing of G’ and G’’ at 25°C\, G’ g reater than G’’ at 37°C\, and finally G’ and G’’ forming a plat eau at 55°C\, characteristic of a gel. The knowledge of these rheological behaviour is crucial for the design and operating instructions of anaerob ic digestion reactors for residues with high TS content. The Vane geometry would\, therefore\, be an effective tool for characterizing the rheologic al behaviour of residues in dry digestion.\n\nhttps://events.saip.org.za/e vent/211/contributions/2256/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2256/ END:VEVENT BEGIN:VEVENT SUMMARY:The Three Wise Sages DTSTART;VALUE=DATE-TIME:20201120T145500Z DTEND;VALUE=DATE-TIME:20201120T151000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2257@events.saip.org.za DESCRIPTION:Speakers: Diouma Kobor (University Assane Seck of Ziguinchor)\ , Guebre Tessema (National Science Foundation)\, Saphina Biira (Busitema U niversity)\nWe close with comments summing up the conference and providing leadership and vision for the future.\nThree wise sages have been selecte d to share their thoughts.\nAll sages have attended the entire conference - aware of their role at the close of the conference. Each sage represents a different community and perspective. \n1st Sage : A senior person.\n2nd Sage : A woman.\n3rd Sage : A young person.\n\nhttps://events.saip.org.za /event/211/contributions/2257/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2257/ END:VEVENT BEGIN:VEVENT SUMMARY:Address : The Honorable Minister : Environment\, Science\, Technol ogy & Innovation DTSTART;VALUE=DATE-TIME:20201118T134500Z DTEND;VALUE=DATE-TIME:20201118T135500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2259@events.saip.org.za DESCRIPTION:Speakers: Kwabena Frimpong-Boateng. (The Ghanain Government)\n https://events.saip.org.za/event/211/contributions/2259/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2259/ END:VEVENT BEGIN:VEVENT SUMMARY:Diamond - The Light Sources Round Table DTSTART;VALUE=DATE-TIME:20201120T133800Z DTEND;VALUE=DATE-TIME:20201120T134900Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2297@events.saip.org.za DESCRIPTION:Speakers: Harrison Andrew (Diamond Light Source)\nThe story of Diamond\, highlighting its role in science and building the community fol lowed by words of wisdom and advice\, to pass on to the AfLS.\n\nhttps://e vents.saip.org.za/event/211/contributions/2297/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2297/ END:VEVENT BEGIN:VEVENT SUMMARY:African Tradition : The AfLS ceremonial Calling stick and Speaking stick DTSTART;VALUE=DATE-TIME:20201118T130000Z DTEND;VALUE=DATE-TIME:20201118T131000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2261@events.saip.org.za DESCRIPTION:Speakers: David Dodoo-Arhin (Department of Physics\, Universit y of Pretoria)\, Prosper Ngabonziza (Max Planck Institute for Solid State Research)\, Simon Connell (University of Johannesburg)\, Tabbetha Dobbins (Rowan University)\nThe AfLS African ceremonial calling stick summons us f rom around the world to participate in this historic Event.\n\nFrom within Africa\, it fist called us\, in 2015\, to AfLS1 in Grenoble in November 2015. It was there throughout the proceedings. Then it next called us back to its home country\, to Ghana\, in January 2019\, for AfLS2. From there it called us to Rwanda\, for AfLS3\, which was to be held at this very tim e. However\, due to the pandemic\, it has now called us instead to this Vi rtual Workshop\, AfLS2020.\n\nThe AfLS ceremonial calling stick from ancie nt Ashanti culture. Normally\, it would be planted at a nexus of roads\, w here all would pass and note its message boards. For the AfLS\, the messag e is the vision of an Advanced Light Source in Africa\, pumping out new sc ientific discoveries\, of great relevance to Africa\, and also the world. Realizing this vision\, means Africa is well on the road to being a knowle dge-based economy and a font of innovation.\n\nThe stick has the gravitas of a sceptre. It depicts both genders equally Symbolically we have\, inclu sivity\, and ubuntu. All are invited\, and all will build the AfLS togethe r. \n\nAt the end of these proceedings\, it will call us again to Rwanda\, in November 2021\, for the rescheduled AfLS3\n\nThe calling stick final r esting place is the future AfLS facility\, where it will still call all pe ople to its campus.\n\nThe AfLS African ceremonial speaking stick\, is use d throughout the conference to endow\, in the African tradition\, each spe aker in turn\, with authority and wisdom to speak. The Speaking stick is h anded over by the Session Chair to each next speaker\, before they commenc e\, and they return it to the chair as they leave. We use the moment of tr ansfer for each official photograph of the speaker.\n\nThe AfLS speaking s tick will be displayed at the future AfLS facility.\n\nhttps://events.saip .org.za/event/211/contributions/2261/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2261/ END:VEVENT BEGIN:VEVENT SUMMARY:ALBA and LEAPS - The Light Sources Round Table DTSTART;VALUE=DATE-TIME:20201120T132700Z DTEND;VALUE=DATE-TIME:20201120T133800Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2262@events.saip.org.za DESCRIPTION:Speakers: Caterina Biscari (ALBA Synchrotron)\nThe story of AL BA\, highlighting its role in science and building the community followed by words of wisdom and advice\, to pass on to the AfLS. The role of LEAPS for Africa and the AfLS is also presented.\n\nhttps://events.saip.org.za/e vent/211/contributions/2262/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2262/ END:VEVENT BEGIN:VEVENT SUMMARY:Elettra - The Light Sources Round Table DTSTART;VALUE=DATE-TIME:20201120T131600Z DTEND;VALUE=DATE-TIME:20201120T132700Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2263@events.saip.org.za DESCRIPTION:Speakers: Giorgio Paolucci (Elettra)\nThe story of Elettra\, h ighlighting its role in science and building the community followed by wor ds of wisdom and advice\, to pass on to the AfLS.\n\nhttps://events.saip.o rg.za/event/211/contributions/2263/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2263/ END:VEVENT BEGIN:VEVENT SUMMARY:Crystallography in Africa: the IUCR-UNESCO Africa Initiative DTSTART;VALUE=DATE-TIME:20201119T142400Z DTEND;VALUE=DATE-TIME:20201119T143600Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2264@events.saip.org.za DESCRIPTION:Speakers: Claude Lecomte (CRM2 University of Lorraine)\nCrysta llography is a science at the crossroads of physics \, chemistry \, geolog y\, biology and material science .This involves therefore many researcher s from all disciplines and then allows a general scientific life and netwo rk . Crystallography is involved in mining\, material \,chemical \, phar maceutical industries. X-ray Crystallography is an important user of SR . Then it is very important to develop this science in sub-Saharan Africa. I n 2014\, for the International Year of Crystallography\, the International Union of Crystallography (IUCR\, www.iucr.org \, Profs G. Desiraju and C. Lecomte) together with UNESCO ( Prof Nalecz \, Dr JP Ngome) have started an ambitious program called IUCR-UNESCO Africa Initiative to promote crys tallography teaching and research. This talk will introduce the Initiative : crystallography equipment for universities \, schools \,open/ travellin g labs .\n\nhttps://events.saip.org.za/event/211/contributions/2264/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2264/ END:VEVENT BEGIN:VEVENT SUMMARY:Letters of Support and Light Sources Roundtable DTSTART;VALUE=DATE-TIME:20201120T130000Z DTEND;VALUE=DATE-TIME:20201120T130500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2265@events.saip.org.za DESCRIPTION:Speakers: Kenenth Evans-Lutterodt (Brookhaven National Labs)\n This seminal session has two parts.\nPart 1 will launch and premiere the L etters of Support for the AfLS\, received from Institutions and light sour ces\, world wide. Also included are the MoUs and MoAs concluded so far. Th e AfLS is both an organisation and a broad umbrella for organisations that all share a vision of the AfLS. \nPart 2 will be an opportunity for Direc tors of selected Light Sources to showcase their facilities\, its scientif ic highlights and also\, to use the opportunity to pass on wisdom and advi ce. The Light Source Directors will consider questions\, and can answer th em as a coherent collective\, or in their own way. The questions are:\n1 - What were the important arguments motivating a light source for your faci lity ?\n2 - How was government(s) and the community engaged ?\n3 - Why did you pick the design you have ?\n4 - What are you best highlights of resea rch ?\n5 - How has it boosted the scientific community ?\n6 - How has it b oosted capacity building\, competitive industry\, asociated science park f ormation\, economic competitiveness ?\n\nhttps://events.saip.org.za/event/ 211/contributions/2265/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2265/ END:VEVENT BEGIN:VEVENT SUMMARY:The structural biology landscape in South Africa: what role do syn chrotrons play in African science? DTSTART;VALUE=DATE-TIME:20201120T140000Z DTEND;VALUE=DATE-TIME:20201120T143000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2266@events.saip.org.za DESCRIPTION:Speakers: Thandeka Moyo (National Institute for Communicable D iseases)\nTBA\n\nhttps://events.saip.org.za/event/211/contributions/2266/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2266/ END:VEVENT BEGIN:VEVENT SUMMARY:The Launch of the AfLS International Advisory Committee - AfLS IAC DTSTART;VALUE=DATE-TIME:20201120T143000Z DTEND;VALUE=DATE-TIME:20201120T144500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2267@events.saip.org.za DESCRIPTION:Speakers: Edward Mitchell (ESRF)\nTBA\n\nhttps://events.saip.o rg.za/event/211/contributions/2267/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2267/ END:VEVENT BEGIN:VEVENT SUMMARY:African Strategy for Fundamental Physics and Applications Launch DTSTART;VALUE=DATE-TIME:20201118T133000Z DTEND;VALUE=DATE-TIME:20201118T134500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2268@events.saip.org.za DESCRIPTION:Speakers: Ketevi Adikle Assamagan (Brookhaven National Laborat ory)\nTBA\n\nhttps://events.saip.org.za/event/211/contributions/2268/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2268/ END:VEVENT BEGIN:VEVENT SUMMARY:GCRF START – Synchrotron Techniques for African Research DTSTART;VALUE=DATE-TIME:20201119T141200Z DTEND;VALUE=DATE-TIME:20201119T142400Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2269@events.saip.org.za DESCRIPTION:Speakers: Bryan Trevor Sewell (University of Cape Town)\nTBA\n \nhttps://events.saip.org.za/event/211/contributions/2269/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2269/ END:VEVENT BEGIN:VEVENT SUMMARY:African Synchrotron Network for Advanced Energy Materials DTSTART;VALUE=DATE-TIME:20201119T140000Z DTEND;VALUE=DATE-TIME:20201119T141200Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2270@events.saip.org.za DESCRIPTION:Speakers: Marcus Newton (University of Southampton)\nNew mater ials for the capture of light and mechanical energy can potentially enable low-cost and innovative renewable sources of energy while eliminating neg ative effects on the environment that are inherent when non-renewable sour ces of energy are utilised. Energy materials characterisation with synchro tron x-rays is a vital tool for the development of modern and next generat ion energy harvesting and storage technologies. The advent of the first A frican Light Source (AfLS) has the potential to transform the energy mater ials and related technology industries that underpin a robust and sustaina ble economy. The ASNAEM project aims to expand the local knowledge base an d build capacity in the existing synchrotron community in preparation for the AfLS. It will enable sustainable partnerships that extend beyond the l ifetime of the project. In this talk\, I will discuss the activities of th e ASNAEM project and our vision for synchrotron science at the AfLS.\n\nht tps://events.saip.org.za/event/211/contributions/2270/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2270/ END:VEVENT BEGIN:VEVENT SUMMARY:A comparative study of two polymorphs of L-aspartic acid hydrochlo ride DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2271@events.saip.org.za DESCRIPTION:Speakers: Rim Benali-Cherif (LASPI2A)\nTwo polymorphs of l-asp artic acid hydrochloride\, C4H8NO4+Cl-\, were obtained from the same aqueo us solution.Their crystal structures have been determined from singlecryst al data collected at 100 K. The crystal structures revealed\nthree- and tw o-dimensional hydrogen-bonding networks forthe triclinic and orthorhombic polymorphs\, respectively. The cations and anions are connected to one ano ther via N—H...Cl and O—H...Cl interactions and form alternating\ncati on–anion layer-like structures. The two polymorphs share common structur al features\; however\, the conformations of the l-aspartate cations and t he crystal packings are different. Furthermore\, the molecular packing of the orthorhombic polymorph contains more interesting interactions which se ems\nto be a favourable factor for more efficient charge transfer within t he crystal.\n\nhttps://events.saip.org.za/event/211/contributions/2271/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2271/ END:VEVENT BEGIN:VEVENT SUMMARY:Tantalum phosphide: A topological weyl semimetal. DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2272@events.saip.org.za DESCRIPTION:Speakers: Kennedy wamalwa khaemba (Department of physics\, Mas inde Muliro University of Science and Technology\, 52428-00200\, Nairobi\, Kenya)\nTopological semi-metals are newly discovered states of quantum ma tter that have arisen interest\nin the research community due to their app lication in spintronics and valleytronics. There are three\ntypes of topol ogical semi-metals (TSMs)\; Dirac Semi-metal (DSM)\, Weyl Semi-metal (WSM) and\nNode Line Semi-metal (NLSM)\, each with special features that makes them novel candidates for\nfuture technologies. Unlike topological insulat ors (TI) that have an energy gap\, TSMs have their\nvalence and conduction bands touching in discrete points in the Brillouin zone. Tantalum phosphi de\n(TaP)\, has been classified as a Weyl semi-metal with only a single ty pe of Weyl fermions and thus\ntopologically distinguished from tantalum ar senide (TaAs) that has two types of Weyl fermions.\nTheoretically\, if spi n-orbit interaction is turned on in the system\, we expect an energy gap. To this\ndate\, little has been devoted to this relativistic interaction i n TaP. Our goal will be to calculate the\nbandstructure in TaP and how the spin-orbit interaction alters the single Weyl fermions. We will em-\nploy first-principles density functional theory (FPDFT) as implemented in the Siesta code. This study\nis not only based on fundamental research interes ts but also of great potential for future applications.\n\nhttps://events. saip.org.za/event/211/contributions/2272/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2272/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiological Assessment of cement particles from Obajana Factory DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2273@events.saip.org.za DESCRIPTION:Speakers: Ibrahim Ayodeji Bello (Ahmadu Bello University Zaria Nigeria)\nMassive building constructions result to high demand of cement production in recent time. This lead Obajana cement plant to operate at ma ximum capacity in Nigeria. Exposure to high level radiation for prolong pe riod can result to acute health effects such as skin burns\, cancer and ca rdiovascular disease. This study evaluates the natural radionuclides and r adiological indices of cement particles from productions plant of Obajana Factory. Gamma ray spectroscopy was used to analyze the activity level of 226Ra\, 232Th and 40K in the samples. The activity concentration of the sa mple ranged between (7.4719±1.9179 – 60.1351±8.5508) BqKg-1\, (29.4892 ±1.1009 – 90.1191±6.2124) BqKg-1 and (84.8930±3.8076 – 179.3318±11 .4227) Bqkg-1\, with the average value 36.0011±17.5529 Bqkg-1\, 49.2077± 21.1908Bqkg-1\, and 146.6098±45.0115 Bqkg-1 for 40K\, 226Ra and 232Th res pectively. The activity concentrations of 226Ra and 232Th were slightly ab ove the corresponding world average concentration of 32 BqKg-1 for 226Ra a nd 45 BqKg-1 for 232Th. The high concentration might be attributed to mate rial composition used for cement production in Obajana Cement Factory. The average values of Absorbed dose (D)\, Annual effective dose rate (H)\, An nual gonad dose equivalent (AGDE) and Excess lifetime cancer risk (ELCR) a re 53.303 nGy-1\, 0.065 mSv\, 363.961 mSvy-1 1.928 x10-3 respectively. The absorbed dose and annual gonad dose equivalent were lower than the world standard of 60 nGy-1 and 1.0 mSv respectively\, while the Annual gonad dos e equivalent (AGDE) and Excess lifetime cancer risk (ELCR) were slightly a bove the world standard of 300 mSvy-1 and 0.29 x10-3 respectively. The ave rage value of External and Internal hazard indices (Hex and Hin) were belo w world standard of unity. The radiological assessment from this research compared favorably with other related published studies and world permissi ble limits\, therefore constitute no radiological risk.\n\nhttps://events. saip.org.za/event/211/contributions/2273/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2273/ END:VEVENT BEGIN:VEVENT SUMMARY:AC Analysis of Synthesized Nanofluids from Palm Kernel Oil for Tr ansformer Insulation DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2275@events.saip.org.za DESCRIPTION:Speakers: Abubakar Abubakar Khaleed (University of Pretoria)\, Samson Okikiola Oparanti (Ahmadu Bello University Zaria)\nThe work presen ted in this paper revealed the effect of insulating (Al2O3) and semiconduc tive (TiO2) nanoparticles on green alternative insulating methyl ester oil synthesized from palm kernel oil. It also investigates the optimal concen tration of the nanoparticle for dielectric improvement. The nanoparticle w as functionalized with oleic acid before dispersion into the methyl ester to modify the stability of the mixture. The characterization of the nanopa rticles was done using Scanning Electron Microscopy coupled with electron dispersive X-ray analysis (EDX). The nanofluids were prepared by dispersin g 0.2\, 0.4\, 0.6\, 0.8 and 1wt% of nanoparticle into the methyl ester. Th e effect of this nanoparticles on loss tangent\, conductivity and AC break down voltage of the synthesized methyl ester was done\, analyzed and compa red. It was observed on both sides of nanoparticle that the loss tangent a nd conductivity reduces with an increasing concentration of nanoparticles. The AC breakdown result was analyzed with Weibull statistical tools and i t was observed that the loading of both nanoparticles increases the charac teristic AC breakdown strength of methyl ester with an optimum performance at 0.6wt%. The result revealed that Al2O3 nanofluid possesses the highest dielectric properties with low loss\, low conductivity and high character istic breakdown strength. The obtained results for both nanoparticles are promising because of improvement in dielectric properties with a noticeabl e one for Al2O3 nanofluid.\n\nhttps://events.saip.org.za/event/211/contrib utions/2275/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2275/ END:VEVENT BEGIN:VEVENT SUMMARY:AfLS3 - The 3rd AfLS Conference in Rwanda DTSTART;VALUE=DATE-TIME:20201120T144500Z DTEND;VALUE=DATE-TIME:20201120T145500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2277@events.saip.org.za DESCRIPTION:Speakers: Prosper Ngabonziza (Max Planck Institute for Solid S tate Research)\nTBA\n\nhttps://events.saip.org.za/event/211/contributions/ 2277/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2277/ END:VEVENT BEGIN:VEVENT SUMMARY:Pulsed laser ablation in liquids: an efficient approach for nanofl uids fabrication DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2279@events.saip.org.za DESCRIPTION:Speakers: TOURIA KHAMLICHE (* UNESCO UNISA ITLABS-NRF Africa C hair in Nanosciences & Nanotechnoly(U2ACN2)\, NANOsciences AFrican NETwork (NANOAFNET)\, University of South Africa Physics Department)\nNanofluids are advanced kind of liquids or heat transfer fluids mixed with a small co ncentration of nanometer-sized solid particles in suspension. Nanofluids h ave broad applications in industries where efficient heat transfer fluids are crucial for cooling or heating processes. In addition\, the shortage o f fossil fuels motivated researchers to use alternative energy sources suc h as solar energy\, particularly\, the Concentrating Solar Power (CSP) whi ch is based on thermal energy conversion. Therefore\, it is critical to en hance the efficiency and performance of the solar thermal systems by using highly stable\, cost effective and efficient nanofluids. The aim of this contribution is the investigation of a nanofluid consists of copper nanopa rticles nCu and Ethylene Glycol (EG) which has been made by a one-step met hod known as pulsed Nd:YAG laser ablation in liquids. In this method\, pur e copper target was ablated in the presence of EG under ambient conditions to form nCu-EG nanofuid. Structural and morphological analysis confirmed the successful ablation of the Cu target in EG\, and spherical Cu nanopart icles were obtained. Thermal conductivity analysis of nCu-EG nanofluid rev ealed an enhancement in thermal conductivity of about 22.74%. These result s confirmed that pulsed Nd:YAG laser ablation of a Cu target in EG could b e a suitable method for the fabrication of efficient nanofluids for solar thermal engineering systems.\n\nhttps://events.saip.org.za/event/211/contr ibutions/2279/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2279/ END:VEVENT BEGIN:VEVENT SUMMARY:Paineira beamline for time-resolved and high resolution X-ray diff raction experiments at Sirius DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2280@events.saip.org.za DESCRIPTION:Speakers: Dean Barrett (CNPEM/LNLS)\nThe Paineira beamline is optimized for powder diffraction with combined spectroscopy techniques and is aimed at the structural characterization of polycrystalline materials under operando working conditions. The talk will briefly cover the fundame ntal parameters of the Sirius storage ring\, the 1st phase beamlines curre ntly under commissioning and finally a brief overview of the Paineria beam line and its capabilities\n\nhttps://events.saip.org.za/event/211/contribu tions/2280/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2280/ END:VEVENT BEGIN:VEVENT SUMMARY:The African Physical Society DTSTART;VALUE=DATE-TIME:20201118T132000Z DTEND;VALUE=DATE-TIME:20201118T133000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2281@events.saip.org.za DESCRIPTION:Speakers: A Wague (N/A)\nTBA\n\nhttps://events.saip.org.za/eve nt/211/contributions/2281/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2281/ END:VEVENT BEGIN:VEVENT SUMMARY:The African Light SourceProject DTSTART;VALUE=DATE-TIME:20201118T131000Z DTEND;VALUE=DATE-TIME:20201118T132000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2282@events.saip.org.za DESCRIPTION:Speakers: Simon Connell (University of Johannesburg)\nThe most transformative mega-research entity is surely the modern light source. Re search is both fundamental and applied. Both streams lead to innovation\, competitive industry\, the solution of problems of particular relevance fo r Africa\, high end human capacity development\, building the culture of l earning\, the inspiration of young learners to greater efforts and buildin g a new generation of competent and enabled youth. There are other aspects \, such as science diplomacy\, pan Africanism\, the globalisation and demo cratisation of participation in new knowledge generation\, the implication that the large scale research infrastructure is fed by a healthy regional and national capacity in terms of human and equipment infrastructure. Th e passionate belief in this positive role for mega-science in society has driven the momentum towards the African Light Source. The call was first s ounded in 2002\, and it has been repeated by many sources on many platform s. African scientists are strongly participating in research exploiting th e power of modern light sources\, both from within African institutions\, and from other institutions\, as the exercise of the African science diasp ora. In addition\, the global science community has also strongly supporte d the global proliferation of the benefits of access to large-scale resear ch infrastructures\, and to extending the collaborative participation tota lly. This combination of African and International leadership towards an A frican Light Source is embodied in the project for a Light Source in Afric a. These COVID times have seen the Light Source designated as an essential service\, remaining open during lockdown\, as the front-runner in the fig ht against this greatest scourge of our decade. Indeed\, we would like to see Africa extend its already significant contribution\, to combating this disease\, and especially others of particular relevance to Africa. This c ontribution details the progress on the Roadmap towards the African Light Source\, and outlines the future projects\, many of which will be discusse d further in this meeting.\n\nhttps://events.saip.org.za/event/211/contrib utions/2282/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2282/ END:VEVENT BEGIN:VEVENT SUMMARY:Bio-mimicry of photonic multi-scaled architectures of butterfly wi ng DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2283@events.saip.org.za DESCRIPTION:Speakers: Sackey Juliet (UNESCO UNISA ITLABS-NRF Africa Chair in Nanosciences & Nanotechnologies)\nIn view of the rising interest in bio mimicry within the Scientific & Engineering global communities\, approachi ng nature\, the STI community is inspired to copy from the numerous creatu res which exhibit peculiar multi-functionalities & adaptation in achieving versatile performances. Natural nanostructures such as those on butterfly wings have the general characteristic of being multifunctional and energy -chemical elements. \nIn view of the established effective thermal managem ent of the butterfly capabilities as demonstrated in several publications\ , the inner ring of the ocellus on the Caligo Memnon was examined. In the quest to unravel the usefulness of the black part\, the authors carefully examined the nanostructures of the scales with various techniques. The ana lysis of the nanostructures give an indication of the factors associated w ith light absorption in the black part of the ocellus. Further examination s under optical studies point to the presence of pigment contributing to t he blackness on the ocellus. \nIndeed\, biomimicking such nanostructures a re useful in the design of oval cost-effective materials for use in applic ations where weight & cost are limiting factors.\n\nhttps://events.saip.or g.za/event/211/contributions/2283/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2283/ END:VEVENT BEGIN:VEVENT SUMMARY:Halogen and non-metals defects induced n- and p-type conductivity in monolayer MoS2 two-dimensional semiconductor DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2286@events.saip.org.za DESCRIPTION:Speakers: Emmanuel Igumbor (University of Pretoria)\nRecent de velopments from the doping of two-dimensional (2D) monolayer MoS2 has open ed up the possibility of scaling down the thickness of semiconductors chan nel field-effect transistors to the sub-nanometer scale. In order to reali se efficient MoS2 based devices including p-n junction and field-effect-tr ansistor for optimal performance\, a controlled doping system needs to be fully understood. \n\nIn this report\, a systematic effective method of do ping in order to realise a p- or n-type conductivity in monolayer MoS2 was predicted using density functional theory with the aid of the generalised gradient approximation. The structural\, electronic and magnetic properti es of halogens and group V atoms substitution\, interstitial and vacancy-c omplexes of monolayer MoS2 were investigated. While the substitutional and vacancy complexes are more energetically favourable under the Mo-rich che mical potential conditions\, the interstitial do not have preference for a ny chemical potential limit conditions. The substitutional defects are mor e energetically favourable than the interstitial in both the Mo-rich and S -rich chemical potential conditions. Whereas the group V substitutional de fects are good candidate for p-type conductivity\, the halogen substitutio ns are good candidate for n-type conductivity. The substitution of the gro up V and halogen atoms induced spin polarisation in the host with a total magnetic moment of 1.00 μB. The defect complexes are stable with respect to their binding energies. While the vacancy-complexes formed by VS and NS \, PS\, AsS behave as p-type semiconductors\, those formed by the SbS and BiS exhibit metallic characters. \n\nIn addition to providing useful hint for device fabrication where spin polarisation are required\, the results presented here could paved the way for more insight to realising enhanced p and n-type conductivity of defective monolayer MoS2 2D semiconductor\n\ nhttps://events.saip.org.za/event/211/contributions/2286/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2286/ END:VEVENT BEGIN:VEVENT SUMMARY:Syncroton Radiation-based X-Ray study on energy storage materials: a case for hematite. DTSTART;VALUE=DATE-TIME:20201118T135500Z DTEND;VALUE=DATE-TIME:20201118T142500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2287@events.saip.org.za DESCRIPTION:Speakers: Mmantsae Diale (University of Pretoria)\nThe convent ional laboratory characterization techniques provide limited information t o better understaning of materials for different optoelectronic applicatio ns. In particular\, understanding electrochemical mechanisms of materials suitable for energy storage may result in better solutions to the global e nergy crisis. Synhroton radiation has very high brilliance and broad energ y range in the electromagnetic radiation\, from far-IR through to hard X-R ay region. The recent availability of synchroton radiation facilities is d riving technical and theoretical advances in scattering and spectroscopic techniques over the last few decades. These advances in synchroton based c haracterization techniques have made it possible to study the underpinning issues in thin films and nanostructured materials used in energy storage devices. An electrochemical roadmap based on much more knowledge-driven ap proach can be drawn by utilizing synchroton based element specific spectro scopic and scattering techniques. This work presents recent developments i n the optimization of materials for efficient energy storage using synchro ton radiation.\n\nhttps://events.saip.org.za/event/211/contributions/2287/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2287/ END:VEVENT BEGIN:VEVENT SUMMARY:Understanding the effect of changing environmental conditions on v ital soil processes DTSTART;VALUE=DATE-TIME:20201118T142500Z DTEND;VALUE=DATE-TIME:20201118T145500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2290@events.saip.org.za DESCRIPTION:Speakers: Asmeret Berhe (University of California\, Merced)\nT BA\n\nhttps://events.saip.org.za/event/211/contributions/2290/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2290/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction and Characterization of Photodiodes prepared with Bi2 S3 Nanowires DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2291@events.saip.org.za DESCRIPTION:Speakers: Kaviyarasu KASINATHAN (University of South Africa)\n This work discloses the characteristics of a Bi2S3 nanowire / ITO photodio de and a manufacture method thereof\; wherein\, the high-crystalline Bi2S3 nanostructures were prepared by an environmental friendly dip-coating met hod onto Indium-doped Tin Oxide (ITO) coated glass substrates using bismut h nitrate and thiourea as raw material with DMF as solvent. The XRD spectr a showed that the Bi2S3 nanowire exhibits orthorhombic structure\, while t he SEM images revealed the formation of uniform sized nanowires with diame ter around 15.8 nm. The optical bandgap of the films had been estimated vi a Tauc plot and found to be in the range of 1.85 eV - 1.9 eV. In order to understand the I-V characterizations of the prepared diode showed prominen t photo-response with a high photo-responsivity of 1.7 μA with a fast res ponse time were reported in detail.\n\nhttps://events.saip.org.za/event/21 1/contributions/2291/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2291/ END:VEVENT BEGIN:VEVENT SUMMARY:Lightsources for Africa\, the Americas\, Asia and Middle East and the Pacific (LAAAMP) DTSTART;VALUE=DATE-TIME:20201119T130000Z DTEND;VALUE=DATE-TIME:20201119T131200Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2292@events.saip.org.za DESCRIPTION:Speakers: Michele Zema (International Union of Crystallography )\nWe describe an initiative funded by a 3-year\, 300K-Euro grant from the International Science Council (ISC) to the International Union of Pure an d Applied Physics (IUPAP) and International Union of Crystallography (IUCr ) in collaboration with over 30 partner organizations that include 16 adva nced light sources to enhance the utilization of advanced light sources an d crystallography in six targeted regions of the world\, namely Africa\, t he Caribbean\, Mexico\, Southeast Asia\, Middle East and the Pacific. LAA AMP’s programs include the development of a Strategic Plan for each regi on\; a Colloquium program that sends experienced light source and crystall ography users to those regions\; establishment of crystallography training schools\; design and distribution of a Brochure that describes advanced l ight sources and crystallography for government officials and the public\; 2-month Faculty-Student (FAST) Team training visits to advanced light sou rces\; and a sample mail-in program for data acquisition at advanced light sources. Finally\, we discuss the path forward for LAAAMP.\n\nhttps://ev ents.saip.org.za/event/211/contributions/2292/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2292/ END:VEVENT BEGIN:VEVENT SUMMARY:African Neutron and Synchrotron Data Analysis Competency - ANSDAC DTSTART;VALUE=DATE-TIME:20201119T134800Z DTEND;VALUE=DATE-TIME:20201119T140000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2293@events.saip.org.za DESCRIPTION:Speakers: Fischer Nico (University of Cape Town)\nTBA\n\nhttps ://events.saip.org.za/event/211/contributions/2293/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2293/ END:VEVENT BEGIN:VEVENT SUMMARY:BioStruct-Africa: empowering Africa-based scientists through struc tural biology knowledge transfer and mentoring - recent advances and futur e perspectives DTSTART;VALUE=DATE-TIME:20201119T133600Z DTEND;VALUE=DATE-TIME:20201119T134800Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2294@events.saip.org.za DESCRIPTION:Speakers: Emmanuel Nji (Biostructafrica)\, Emmanuel Nji (Unive rsity of Stockholm\, Sweden)\nBeing able to visualize biology at the molec ular level is essential for our understanding of the world. A structural b iology approach reveals the molecular basis of disease processes and can g uide the design of new drugs as well as aid in the optimization of existin g medicines. However\, due to the lack of a synchrotron light source\, ade quate infrastructure\, skilled persons and incentives for scientists in ad dition to limited financial support\, the majority of countries across the African continent do not conduct structural biology research. Nevertheles s\, with technological advances such as robotic protein crystallization an d remote data collection capabilities offered by many synchrotron light so urces\, X-ray crystallography is now potentially accessible to Africa-base d scientists. This leap in technology led to the establishment in 2017 of BioStruct-Africa\, a non-profit organization (Swedish corporate ID: 802509 - 6689) whose core aim is capacity building for African students and resea rchers in the field of structural biology with a focus on prevalent diseas es in the African continent. The team is mainly composed of\, but not limi ted to\, a group of structural biologists from the African diaspora. The m embers of BioStruct- Africa have taken up the mantle to serve as a catalys t in order to facilitate the information and technology transfer to those with the greatest desire and need within Africa. BioStruct-Africa achieves this by organizing workshops onsite at our partner universities and insti tutions based in Africa\, followed by post-hoc online mentoring of partici pants to ensure sustainable capacity building. The workshops provide a the oretical background on protein crystallography\, hands-on practical experi ence in protein crystallization\, crystal harvesting and cryo-cooling\, li ve remote data collection on a synchrotron beamline\, but most importantly the links to drive further collaboration through research. Capacity build ing for Africa-based researchers in structural biology is crucial to win t he fight against the neglected tropical diseases\, e.g. ascariasis\, hookw orm\, trichuriasis\, lymphatic filariasis\, active trachoma\, loiasis\, ye llow fever\, leprosy\, rabies\, sleeping sickness\, onchocerciasis\, schis tosomiasis\, etc.\, that constitute significant health\, social and econom ic burdens to the continent. BioStruct-Africa aims to build local and nati onal expertise that will have direct benefits for healthcare within the co ntinent.\n\nhttps://events.saip.org.za/event/211/contributions/2294/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2294/ END:VEVENT BEGIN:VEVENT SUMMARY:The X-TechLab x-ray techniques platform in Bénin DTSTART;VALUE=DATE-TIME:20201119T131200Z DTEND;VALUE=DATE-TIME:20201119T132400Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2295@events.saip.org.za DESCRIPTION:Speakers: Thierry d'Almeida (CEA)\nTBA\n\nhttps://events.saip. org.za/event/211/contributions/2295/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2295/ END:VEVENT BEGIN:VEVENT SUMMARY:Démarche pour le contrôle thermique d’un nanosatellite DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2298@events.saip.org.za DESCRIPTION:Speakers: Amine AKKA (Faculty of science)\nIl est toujours con nu que les nanosatellites disposent de la plus petite taille de l’envelo ppe\, un coût bas\, avec un temps de développement le plus court. En eff et\, c’est une nouvelle forme miniaturisée des satellites conventionnel s et l’une des formes les plus recherchées.\n\nPourtant\, ils font face à différents problèmes à savoir les gradients thermiques élevés ou les différentes charges thermiques provenant des rayonnements solaires et des émissions infrarouges planétaires. La prédiction du comportement t hermique se fait presque par simulation. Ce dernier doit être bien exécu té afin d’obtenir des résultats fiables en tenant compte de tous les p aramètres qui régissent l’environnement spatial\, à savoir le vide et le rayonnement des sources d’énergie élevée.\n\nLes charges thermiqu es externes couplées à la dissipation thermique interne provoquent les e ffets les plus défavorables de la structure compacte des nanosatellites\, et qui jouent un rôle incontournable dans la production d’une chaleur excessive\, en particulier pendant les heures de haute chaleur. Pour cette raison\, le contrôle thermique des nanosatellites et en particulier le c ontrôle passif\, qui est principalement effectué pour maintenir tous les sous-systèmes ainsi que les composants de la charge utile dans les limit es de température spécifiées\, reste l’une des solutions les plus ré alisables à apporter.\n\nLe présent document vise à décrire les diffé rents types de rayonnement thermique que subit le nanosatellite\, puis à les simuler avec précision. L’impact sur l’ensemble du vaisseau spati al apparaît clairement lorsqu’il est en orbite et lorsque des paramètr es changent tels que l’émissivité et l’absorptivité qui font réfé rence aux revêtements optiques des matériaux\n\nIl faut noter que pour l a simplicité de la démarche\, une forme simple du nanosatellite a été considérée. L’approche réalisée était un premier pas pour obtenir d es résultats tangibles tout en envisageant une géométrie plus complexe et plus complète du nanosatellite à l’avenir.\n\nhttps://events.saip.o rg.za/event/211/contributions/2298/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2298/ END:VEVENT BEGIN:VEVENT SUMMARY:Ferrophotovoltaic properties of PZN-4.5PT nanoparticles thin films DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2299@events.saip.org.za DESCRIPTION:Speakers: Rémi NDIOUKANE\, (Assane seck University of Ziguinc hor)\nFerroelectric photovoltaics has been known for 50 years\, it was not investigated extensively due to the low power conversion efficiency. Thus \, we have very limited knowledge of ferroelectric materials and the under lying PV mechanism. Remarkably\, recent research on the ferroelectric PV c ells shows that engineered domain walls can exhibit a photovoltaic effect with an impressively high voltage output. The internal electric field in t he ferroelectric material is one order of magnitude larger than convention al p-n or hetero junction solar cells [1]. Despite their excellent propert ies\, one of the greatest difficulties to integrate widely such materials in electronic devices is to achieve them in thin films form because of the ir incongruent melting property [2]. In our recent studies we fabricate su ccessively such thin films using the perovskites nanoparticles dispersed o n a gel and deposited on silicon substrate conserving their ferroelectric properties.\nIn this work\, we present a new generation of photovoltaic ce lls based on perovskite materials. Different parameters affect the perform ances of this cells such as architecture\, the type of material used for t he active layer\, the techniques of fabrication and preparation of differe nt layers. Thus we developed PZN-4.5PT and PZN-4.5PT + 1 % Mn nanoparticle s thin film and show that these thin films could be used in photovoltaic a nd photoferroelectric applications. Different technics and methods were us ed to characterize them.\n\nhttps://events.saip.org.za/event/211/contribut ions/2299/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2299/ END:VEVENT BEGIN:VEVENT SUMMARY:ESRF - The Light Sources Round Table DTSTART;VALUE=DATE-TIME:20201120T130500Z DTEND;VALUE=DATE-TIME:20201120T131600Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2300@events.saip.org.za DESCRIPTION:Speakers: Francesco Sette (European Synchrotron Radiation Faci lity (ESRF))\nThe story of the ESRF\, highlighting its role in science and building the community followed by words of wisdom and advice\, to pass o n to the AfLS.\n\nhttps://events.saip.org.za/event/211/contributions/2300/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2300/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiation-induced defects on pulsed laser deposited VO2 thin films DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2301@events.saip.org.za DESCRIPTION:Speakers: Itani Given Madiba (University of South Africa)\nA g rowing interest in the development and use of small satellites in interpla netary missions with more up to date technologies is becoming a considerab le option than large conventional satellites. Future development of these small satellites will require the application and use of passive thermochr omic layers to achieve good thermal control for longer mission life and co st-effective launches. Vanadium dioxide (VO2) thin films present an immine nt prospect as a passive smart radiator device (SRD) for thermal control m anagement in nano and microsatellites. The thermochromic response of VO2 b ased SRDs is channeled by low emissivity at lower temperatures to preserve the heat\, and high emissivity at high temperatures to fritter away the a dditional unnecessary heat. Different radiation species in a space environ ment interacts with materials\, and induce properties modifications in dif ferent ways. Hence\; VO2 coatings need to demonstrate deep-space radiation tolerance based on their structural\, electronic\, and electrical propert ies. This review article provides a focussed overview of the radiation res ponse and phase transition characteristics of VO2 thin films subjected to gamma rays\, neutrons\, and magnesium ions with energy and projectile dose s similar to those accosted by spacecraft. A broad overview of the radiati on effects and their interaction mechanisms on pulsed laser deposited VO2 thin films.\n\nhttps://events.saip.org.za/event/211/contributions/2301/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2301/ END:VEVENT BEGIN:VEVENT SUMMARY:Palaeontology enabled by Light Source studies DTSTART;VALUE=DATE-TIME:20201119T150000Z DTEND;VALUE=DATE-TIME:20201119T153000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2302@events.saip.org.za DESCRIPTION:Speakers: Kudakwashe Jakata (University of the Witwatersrand)\ nTBA\n\nhttps://events.saip.org.za/event/211/contributions/2302/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2302/ END:VEVENT BEGIN:VEVENT SUMMARY:The AfLS CDR Process and Status DTSTART;VALUE=DATE-TIME:20201118T145500Z DTEND;VALUE=DATE-TIME:20201118T152500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2303@events.saip.org.za DESCRIPTION:Speakers: Christine Darve (European Spallation Source)\, Doria n Bohler (Stanford Linear Accelerator Laboratory (SLAC))\, Riccardo Bartol ini (DESY)\, Tabbetha Dobbins (Rowan University)\nThe Conceptual Design Re port (CDR) is an important founding document for any large scale research infrastructure. In the case of the African Light Source (AfLS\, we will ha ve a CDR with four volumes:\n * Volume I. Political\, Economic Developm ent and Management Concepts\n * Volume II. Machine Design Concepts\n * Volume III. Scientific Cases and Technical Capabilities \n * Volume IV. Integrated Site Design and Construction\nThe spirit of the document is community consultation\, and it will ultimately be written by experts\, i ncluding those from the global community. It is Africa owned\, and exhibit the spirit of Ubuntu.\nThis presentation has two parts. In the first we d escribe the CDR Document\, and look at its sections\, their intentions and target audiences.\nWe then lay out the CDR Roadmap process including the community consultation in virtual workshops by subject area\, to elicit ma ny White Papers\, especially for the scientific case. The the process unfo lds as to the mechanism of managing the vision and quality\, as well as co herence of the CDR document. \nFollowing this we will describe the work do ne so far on the White Paper for Volume II as an example. This Volume deal s with the machine aspects\, and contextualises this discussion against in ternational developments.\n\nhttps://events.saip.org.za/event/211/contribu tions/2303/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2303/ END:VEVENT BEGIN:VEVENT SUMMARY:SESAME - Light Sources Round Table DTSTART;VALUE=DATE-TIME:20201120T134900Z DTEND;VALUE=DATE-TIME:20201120T140000Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2305@events.saip.org.za DESCRIPTION:Speakers: Khaled Toukan (SESAME)\nThe story of SESAME\, highli ghting its role in science and building the community followed by words of wisdom and advice\, to pass on to the AfLS.\n\nhttps://events.saip.org.za /event/211/contributions/2305/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2305/ END:VEVENT BEGIN:VEVENT SUMMARY:The African Materials Research Society DTSTART;VALUE=DATE-TIME:20201119T143600Z DTEND;VALUE=DATE-TIME:20201119T144800Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2306@events.saip.org.za DESCRIPTION:Speakers: Sam Chigome (Botswana Inst for Technology Research a nd Innovation)\nTBA\n\nhttps://events.saip.org.za/event/211/contributions/ 2306/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2306/ END:VEVENT BEGIN:VEVENT SUMMARY:Towards an African Crystallographic Association DTSTART;VALUE=DATE-TIME:20201119T132400Z DTEND;VALUE=DATE-TIME:20201119T133600Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2307@events.saip.org.za DESCRIPTION:Speakers: Delia Haynes (Stellenbosch University)\nTBA\n\nhttps ://events.saip.org.za/event/211/contributions/2307/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2307/ END:VEVENT BEGIN:VEVENT SUMMARY:XRD\, USAXS\, SAXS and WAXS Investigations of PZN-4.5PT nanopartic les thin Films DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2308@events.saip.org.za DESCRIPTION:Speakers: Diouma Kobor (University Assane Seck of Ziguinchor)\ nThe Pb(Zn1/3Nb2/3)O3-4.5PbTiO3 (PZN-4.5PT) single crystals showed very la rge ferroelectric and piezoelectric properties compared to traditional fer roelectric ceramics (BaTiO3 and PZT) used presently as active material in medical imaging\, detection and sonars. However\, despite these excellent properties\, the greatest difficulty to use PZN-4.5PT single crystals on e lectronic devices is to achieve them in thin layers form because of their incongruent melting property. To overcome this difficulty\, we deposit the m as thin layers by dispersing their nanoparticles in a gel containing a m atrix that can maintain at least their bulk properties. After this size re duction at nanoscale and the annealing process following the deposition\, changes and structural transformations would occur. We fabricate with succ ess thin films by dispersing these nanoparticles in a gel. The materials s how some agglomeration at the surface of the silicon substrate films (from SEM images) and non-identified hexagonal microcrystals\, which could be a t the origin of their excellent properties.\nIn this paper we use the comb ined USAXS/SAXS/WAXS instrument at 9ID beamline at APS-ANL for in situ cha racterization of undoped and 1% Mn doped PZN-4.5PT inorganic perovskite na noparticles thin films deposited on nanostructured silicon to understand t he phases transitions and determine the observed hexagonal microcrystals s tructure. It revealed a hexagonal structure of the nanoparticles thin film s\, which could be explained by the new phase that can be assigned to the Pb3(PO4)2 based component. The peak at 31° indicates the presence of the rhombohedral phase perovskites assigned to the nanoparticles. XRD spectra\ , Raman and EDX mapping are compared to the USAXS\, SAXS and WAXS results. \nKeywords: Perovskite\, nanoparticles\, thin film\, Synchrotron\, Xray\n \nFigure 1: EDX mapping for PZN-4.5PT thin film on silicon substrate afte r annealing.\n\nhttps://events.saip.org.za/event/211/contributions/2308/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2308/ END:VEVENT BEGIN:VEVENT SUMMARY:Plasmonic refractive index sensitivity of silver nanoparticles wit h graphene coatings layers used for LSPR biosensor applications DTSTART;VALUE=DATE-TIME:20201120T152500Z DTEND;VALUE=DATE-TIME:20201120T162500Z DTSTAMP;VALUE=DATE-TIME:20260422T055023Z UID:indico-contribution-211-2309@events.saip.org.za DESCRIPTION:Speakers: Oumaima HAIDAR (Laboratory of Advanced Materials Stu dies and Applications (LEM2A)\, Physics Department\, Faculty of Science\, Moulay Ismail University of Meknes\, B.P.11201 Zitoune Meknes\, Morocco .)\nA new hybrid graphene layer structure of the resonance of localized su rface plasmon (LSPR)\, with silver nanoparticles (AgNPs) and substrate has been proposed to obtain a broadband absorption response for plasmon biose nsors. The resonance peaks in the absorption spectra of the nanostructure SiOx/AgNPs/Graphene\, demonstrate significantly different profiles such as the thickness of the graphene\, and the refractive index of the surroundi ng environment which is\, gradually\, diverse. Numerical simulation reveal s a shift in plasmon resonance peaks which result from coupling between th e AgNPs networks and the covering graphene layer. In addition\, the LSPR modes swing to red from 412 nm to 548 nm when the thickness of the graphen e layer deposited on silver nanoparticles changes from 0.34 nm to 9 nm. We have found that the LSPR modes can lead to an improvement in terms of sen sitivity to a deposit of a graphene layer. While being sensitive to variat ions of the graphene layer with the incidence wave normal to the substrate and leading to a gain of 304.60% (4.04 times) when the pure AgNPs convent ional biosensor was coated with graphene layer of the 9 nm. These characte ristics should make these biosensors a choice preferred for biosensors app lications\, compared to other contemporary biosensors.\n\nhttps://events.s aip.org.za/event/211/contributions/2309/ LOCATION:Hosted virtually by the AfLS & AfPS Zoom (sent to registered dele gates) URL:https://events.saip.org.za/event/211/contributions/2309/ END:VEVENT END:VCALENDAR