Construction of Maximum Tortuosity of Single Fluid Path in Grid-based 2-d Sys...Sparisoma Viridi
Tortuosity of 2-d and 3-d small system are constructed using grid based system. Thermodynamics postulate shows that possiblility of a microstate with tortuous channel is very small, in order of 10^{-17}. This means other mechanism is required why nature can provide some structures.
Construction of Maximum Tortuosity of Single Fluid Path in Grid-based 2-d Sys...Sparisoma Viridi
Tortuosity of 2-d and 3-d small system are constructed using grid based system. Thermodynamics postulate shows that possiblility of a microstate with tortuous channel is very small, in order of 10^{-17}. This means other mechanism is required why nature can provide some structures.
Dr A Srivani
Physics Doctorate
VVIT ENGINEERING COLLEGE
Teaching: Engineering Physics and Engineering Mechanics
Awards: Best Presentation, Best Young scientist and Best paper Award.
CONFERENCE PROCEEDINGS
11th International Conference on Researches in Science and Technology (ICRST), 20-21 Sept, 2016, London
Imperial College London, South Kensington Campus | London SW7 2AZ
Email: info@wasrti.org
http://www.wasrti.org
Diffusion Simulation with JS: Writing Your Own ABM CodeSparisoma Viridi
Slide for Workshop on Biophysics, Room D, 10.00-12.00, Friday, 9 August 2019 in 17th SEACOMP 2019 & 3rd PIT-FMB 2019, 8-10 August 2019, Badung, Indonesia
Dr A Srivani
Physics Doctorate
VVIT ENGINEERING COLLEGE
Teaching: Engineering Physics and Engineering Mechanics
Awards: Best Presentation, Best Young scientist and Best paper Award.
CONFERENCE PROCEEDINGS
11th International Conference on Researches in Science and Technology (ICRST), 20-21 Sept, 2016, London
Imperial College London, South Kensington Campus | London SW7 2AZ
Email: info@wasrti.org
http://www.wasrti.org
Diffusion Simulation with JS: Writing Your Own ABM CodeSparisoma Viridi
Slide for Workshop on Biophysics, Room D, 10.00-12.00, Friday, 9 August 2019 in 17th SEACOMP 2019 & 3rd PIT-FMB 2019, 8-10 August 2019, Badung, Indonesia
Simulation of cell budding & binary fission:A preliminary study using molecu...Sparisoma Viridi
International Conference and School on Physics in Medicine and Biosystems, to be held virtual on Zoom from 6 to 8 November 2020, IPB University, Bogor, Indonesia, url https://www.icspmb.org/
In-House Training Online Penyusunan Jurnal Sains, SEAMEO QITEP in Science (SEAQIS), Bandung, Indonesia, 14-16 April 2020, url https://doi.org/10.5281/zenodo.3751238
Resume beberapa hal yang dapat menyebabkan perubahan fasa pada gelombang sebagai persiapan untuk fenomena gelombang stastioner, interferensi dua sumber, interferensi lapisan tipis, pelayangan, dan lainnya
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A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
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Molecular Dynamics Simulation of Floating Spheres Forming Two-Dimensional Hexagonal Close Packed Structure
1. 9-10 July 2019
Depok, Indonesia
The 5th International Symposium on
Current Progress in Mathematics and
Sciences (ISCPMS 2019)
1
Molecular Dynamics Simulation of
Floating Spheres Forming Two-
Dimensional Hexagonal Close
Packed Structure
Sparisoma Viridi1
, Veinardi Suendo2
1
Department of Physics, Institut Teknologi Bandung, Bandung 40132, Indonesia
2
Department of Chemistry, Institut Teknologi Bandung, Bandung 40132, Indonesia
1
dudung@fi.itb.ac.id, 2
vsuendo@chem.itb.ac.id
20190710_6
2. 9-10 July 2019
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The 5th International Symposium on
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Sciences (ISCPMS 2019)
2
Outline
• Introduction
• Problem
• Simulation
• Results and discussion
• Summaries
3. 9-10 July 2019
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Sciences (ISCPMS 2019)
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Introduction
4. Hexagonal close packed structure
• Hexagonal close packed structure (HCP) is a
common type of structures in nanoscale sys-
tems, that has been observed in powder con-
sisted of spherical particles of polymethyl-
methacrylate with mean radius about 170 nm
and polydispersity less than about 0.05
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P. N. Pusey, W. van Megen, P. Bartlett, B. J. Ackerson, J. G. Rarity, S. M. Underwood, "Structure of crystals of hard
colloidal spheres", Physical Review Letters [Phys. Rev. Lett.], vol. 63, no. 25, pp. 2753-2756, Dec 1989, url
https://doi.org/10.1103/PhysRevLett.63.2753.
5. HCP as template for creating pores
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Andreas Stein, "Sphere templating methods for periodic porous solids", Microporous and Mesoporous Materials [Micro-
porous Mesoporous Mater.], vol. 44-45, no., pp. 227-239, Apr 2001, url https://doi.org/10.1016/S1387-1811(01)00189-
5.
6. Strechable film – H(n)CP
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polydimethylsiloxane
(PDMS)
Xin Yan, Jimin Yao, Guang Lu, Xiao Li,
Junhu Zhang, Kun Han, Bai Yang,
"Fabrication of non-close-packed arrays of
colloidal spheres by soft lithography",
Journal of the American Chemical Society
[J. Am. Chem. Soc.], vol. 127, no. 21, pp.
7688-7689, May 2005, url
https://doi.org/10.1021/ja0428208.
7. HCP structure of 1 mm beads
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The 5th International Symposium on
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Sciences (ISCPMS 2019)
7
Andreea Panaitescu, K. Anki Reddy, Arshad Kudrolli, "Nucleation and crystal growth in sheared granular sphere
packings", Physical Review Letters [Phys. Rev. Lett.], vol. 108, no. 10,, p. 108001, Mar 2012, url
https://doi.org/10.1103/PhysRevLett.108.108001.
8. Multi-domain HCP in ~7 mm beads
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Muhammad Iqbal Rahmadhan Putra, Aufa Rudiawan, Wahyuni Andariwulan, Rubén García Berasategui, Sparisoma
Viridi, "Network analysis of the Brazil nut effect phenomenon with a single intruder", IOP Conference Series: Materials
Science and Engineering [IOP Conf. Ser.: Mater. Sci. Eng.], vol. 546, no. 5, p. 052057, Jun 2019, url
https://doi.org/10.1088/1757-899X/546/5/052057.
Disc thickness 3 mm, beads deameter 6.8 mm and
one particle as intruder with diameter of 2.4 cm
9. 9-10 July 2019
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Problem
10. 96 million 'shade balls' at LA
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Mashable, "LA throws 96 million 'shade balls' at its water shortage — and it's mesmerizing | Mashable", YouTube,
13.08.2015, url https://www.youtube.com/watch?v=mEmwJzQjwyw [20190710].
11. Question
• How can these spheres form a HCP structure?
• What is the attractive force between two
spheres?
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12. 9-10 July 2019
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Simulation
13. System
• N spheres with diameter σ and density ρi are
floating on the surface of fluid with density ρf
(gravitational and buoyant forces)
• Spheres will be also under influence of drag
force due to fluid viscosity η
• Between two spheres there will be repulsive
and attractive forces
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14. Considered forces
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.
15. Gravitational force
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.
gG iii
ρπσ6
1
=
16. Buoyant force
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.
( )gzVB fifi
ρ−=
17. Buoyant force (cont.)
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( )
( )[ ] ( )[ ]{ }
≤+
−≤≤+
+−−+−
−≤
=
.
,0
,
,
,
,
2
1
2
1
2
1
3
8
13
3
1
2
12
4
1
2
1
3
6
1
zz
zzz
zzzz
zz
zV
if
ifif
ififi
if
i
fi
σ
σσ
σσσπ
σ
πσ
18. Drag force
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.
( )fiifi vvD
−−= σπη3
19. Normal force
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.
ijijNijijNij vrkN ˆˆ ξγξ
−=
20. Normal force (cont.)
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( )[ ]ijjiij r−+= σσξ 2
1
,0max
21. Attractive force
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.
22. Newton’s second law of motion
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23. Numerical integration
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24. 9-10 July 2019
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Results and discussion
25. Simulation parameters
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mdfhcp.js
27. t = 0 s
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0.5σ 1.5σ
28. t = 1 s
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0.5σ 1.5σ
29. t = 3 s
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0.5σ 1.5σ
30. t = 4 s
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0.5σ 1.5σ
31. t = 6 s
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0.5σ 1.5σ
32. t = 10 s
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0.5σ 1.5σ
33. Contactopy
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0
50
100
150
200
250
300
0 2 4 6 8 10 12 14 16 18 20
C
t
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Summaries
35. Conclusion
• Simulation of floating spheres forming two-
dimensional hexagonal close packed (HCP)
structure has been performed
• Attractive force must be introduced to the
system in order to get the HCP structure
• Origin of this type of force is unknown
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36. Acknowledgements
• The 5th ISCPMS 2019 Committee and FMIPA
Universitas Indonesia for the invitation in
presenting this work
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37. 9-10 July 2019
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https://osf.io/a3gjv/
38. 9-10 July 2019
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Thank you