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Justification on cyclopropene to propyne isomerization pathway based on vibrational calculations

Journal of physics: Conference Series 2020年第1期1568卷

作者： R Madinah F Rusydi L S P Boli V Khoirunisa M Z Fahmi A H Zaidan Research Center for Quantum Engineering Design Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia Department of Physics Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia Engineering Physics Study Program Institut Teknologi Sumatera Lampung 35365 Indonesia Department of Chemistry Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia

We report a density-functional coupled with vibrational calculation on justifying the isomerization pathway of cyclopropene to propyne. The idea is to present the pathway in energy level diagram which the transition state is ensured by tracking a particular mode that supports the cyclic bond breaking and triple bond formation to occur. This mode decreases along the pathway and disappears at the transition state. To verify the designed pathway, the activation energy of the isomerization is used to find the rate constant with respect to experimental data at 500 K and 700 K by using transition state theory (TST). At those temperatures, TST predicts the rate constant at the same order of magnitude with the experimental result. It shows that the trend between calculation and experimental data is qualitatively in a good agreement, which implies that the designed pathway is justified. Furthermore, this study can be used as a guide if one needs to construct an isomerization pathway.

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Identification of Magnetite Material (Fe3O4) Based on Natural Materials as Catalyst for Industrial Raw Material Application

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Journal of physics: Conference Series 2019年第1期1232卷

作者： Maulinda Ikramullah Zein Zulkarnain Jalil Industrial Engineering Study Program Engineering Faculty of serambi Mekkah University Banda Aceh Indonesia Material Physics Laboratory Department of Physics Faculty of Mathematics and Natural Science SyiahKuala University Banda Aceh Indonesia

Identification of magnetite nanoparticles synthesized from natural iron sand with a chemical treatment that is by using thecoprecipitation method on temperature and heated spaces, using a pair of acids and bases, i.e. HCL as a solvent NH4OH and as its precipation. The Crystal structure, the percentage of elements, the particle size and properties of the magnetism material characterization by XRD, XRF identification testing, and permagraph. From the results obtained in the Analysis that the value of the percentage purity of Fe3O4 are derived from Natural Sands before Extraction is of 81.42%, and once on extract 86.73% increase to its purity. From the results of the analysis of properties of ferrite magnet to Fe3O4from sand iron retrieved the value of Saturation Magnetization (Ms) produced amounted to 0.29 T, or residual magnetization Remanence (Br) of 0081 T, and Coercivityy(Hc) amounted to 1.82 kA/m expected data analysis results may explain the comparison characteristics in structure and magnetic properties of material with a natural sand Fe3O4 Aldrich so it can be an additional related information value added (added value) the local SDA.

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Optimization of frequency and stirring rate for synthesis of magnetite (Fe3O4) nanoparticles by using coprecipitation- Ultrasonic irradiation methods

Optimization of frequency and stirring rate for synthesis of...

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2016 engineering physics International Conference, EPIC 2016

作者： Rahmawati, Retno Permana, Mohammad Gilang Harison, Bill Nugraha Yuliarto, Brian Suyatman Kurniadi, Deddy Engineering Physics Department Faculty of Industrial Technology ITB Bandung40132 Indonesia Physics Study Program Faculty of Sains and Technology UIN SunanKalijaga Yogyakarta55281 Indonesia

Magnetite (Fe3O4) nanoparticles from iron sand as starting materials have been successfully synthesized by using coprecipitation- ultrasonicirradiation methods. This paper reports the preparation and optimization result of ultrasonic frequency and stirring rate during the synthesis process. The frequencies of ultrasonic conducted in this research are 300, 400 and 400 kHz. The stirring rates performed in the synthesis process are varied from 500 to 900 rpm. The qualitative analysis by using X-Ray Diffractometer (XRD) showed that the structure of Fe3O4 nanoparticles have a same phase with ICCD No. 75-0449. Moreover, the quantitative analysis by using Debye-Scherer equation showed that the crystallite size of Fe3O4 ranging from 21 to 25 nm depend on the ultrasonic frequency and stirring rate. Meanwhile, the transmission electron microscopy (TEM) result revealed that the Fe3O4 tend to form spherical shape with little agglomeration on the morphology of the Fe3O4. The magnetic properties of Fe3O4 were investigated by using vibrating sample magnetometer (VSM). The VSM measurement result showed that the Fe3O4 have saturation magnetization (Ms), remanent magnetization (Mr) and coercivity field (Hc) at 25 emu/gram, 6,0562 emu/gram, and 0,0108 T, respectively. Based on the magnetic characterization, the Fe3O4 nanoparticles have a potential to be appliedin biomedical field. © 2017 Published by Elsevier Ltd.

关键词： Magnetite

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Induction voltages square and triangle solenoid as alternatives electrical energy resources

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Journal of physics: Conference Series 2019年第1期1185卷

作者： H Pathoni D Pratiwi Education Physics Study Program Education and Teacher Training Faculty Jambi University Jl. Jambi Muara-Bulian Km15 Mendalo Darat Jambi 36361 Indonesia Electrical Engineering Study Program Engineering Faculty Jambi University Jl.Tri Brata Pondok Meja Muara Jambi Jambi Indonesia

Solenoids have been made with square and triangular cross-sections. Both kinds of solenoids are made with an iron core and without an iron core. The solenoids specification were 12 cm long and 3.5 cm wide with 220 windings and 900 windings. The iron core specification was 12.5 cm long and 8 mm diameter. The induction voltages both of solenoids have calculated with experiments method in the laboratory. Calculation of induction voltages with the experiment method used the motor as the magnetic drive, full-wave rectifier circuit, neodym magnet, and led lamp. Induction voltage and electric current obtained of each solenoid for range from two cm until ten cm. The closest distance between the solenoid with the motor as magnetic drive and the greater the number of solenoid windings produced the greater the induction voltages. Triangular-sided solenoids with 220 windings produced faster induction voltages than the square-sided solenoid for the same number of windings. While an iron core solenoids produced faster induction voltages than solenoid without an iron core.

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Measurement of inclusive jet cross section and substructure in p+p collisions at s=200 GeV

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Physical Review D 2025年第11期111卷 112008-112008页

作者： N. J. Abdulameer U. Acharya C. Aidala N. N. Ajitanand Y. Akiba R. Akimoto J. Alexander M. Alfred V. Andrieux S. Antsupov K. Aoki N. Apadula H. Asano E. T. Atomssa T. C. Awes B. Azmoun V. Babintsev M. Bai X. Bai N. S. Bandara B. Bannier E. Bannikov K. N. Barish S. Bathe V. Baublis C. Baumann S. Baumgart A. Bazilevsky M. Beaumier R. Belmont A. Berdnikov Y. Berdnikov L. Bichon D. Black B. Blankenship D. S. Blau J. S. Bok V. Borisov K. Boyle M. L. Brooks J. Bryslawskyj H. Buesching V. Bumazhnov S. Butsyk S. Campbell R. Cervantes C.-H. Chen D. Chen M. Chiu C. Y. Chi I. J. Choi J. B. Choi S. Choi P. Christiansen T. Chujo V. Cianciolo Z. Citron B. A. Cole M. Connors R. Corliss N. Cronin N. Crossette M. Csanád T. Csörgő L. D’Orazio T. W. Danley A. Datta M. S. Daugherity G. David K. DeBlasio K. Dehmelt A. Denisov A. Deshpande E. J. Desmond L. Ding A. Dion D. Dixit V. Doomra J. H. Do O. Drapier A. Drees K. A. Drees J. M. Durham A. Durum H. En’yo T. Engelmore A. Enokizono R. Esha K. O. Eyser B. Fadem W. Fan N. Feege D. E. Fields M. Finger, Jr. M. Finger D. Firak D. Fitzgerald F. Fleuret S. L. Fokin J. E. Frantz A. Franz A. D. Frawley Y. Fukao Y. Fukuda T. Fusayasu K. Gainey P. Gallus C. Gal P. Garg A. Garishvili I. Garishvili H. Ge F. Giordano A. Glenn X. Gong M. Gonin Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji T. Guo H. Guragain Y. Gu T. Hachiya J. S. Haggerty K. I. Hahn H. Hamagaki H. F. Hamilton J. Hanks S. Y. Han S. Hasegawa T. O. S. Haseler K. Hashimoto R. Hayano T. K. Hemmick T. Hester X. He J. C. Hill K. Hill A. Hodges R. S. Hollis K. Homma B. Hong T. Hoshino N. Hotvedt J. Huang T. Ichihara Y. Ikeda K. Imai Y. Imazu M. Inaba A. Iordanova D. Isenhower A. Isinhue D. Ivanishchev S. J. Jeon M. Jezghani X. Jiang Z. Ji B. M. Johnson K. S. Joo D. Jouan D. S. Jumper J. Kamin S. Kanda B. H. Kang J. H. Kang J. S. Kang D. Kapukchyan J. Kapustinsky S. Karthas D. Kawall A. V. Kazantsev J. A. Key V. Khachatryan P. K. Khandai A. Khanzadeev K. M. Kijima C. Kim D. J. Kim E.-J. Kim M. Kim Y.-J. K Debrecen University H-4010 Debrecen Egyetem tér 1 Hungary HUN-REN ATOMKI H-4026 Debrecen Bem tér 18/c Hungary Georgia State University Atlanta Georgia 30303 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Department of Physics University of Michigan Ann Arbor Michigan 48109-1040 USA Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA Deceased. RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Department of Physics and Astronomy Howard University Washington DC 20059 USA Saint Petersburg State Polytechnic University St. Petersburg 195251 Russia KEK High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan Iowa State University Ames Iowa 50011 USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794-3800 USA Kyoto University Kyoto 606-8502 Japan Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Collider-Accelerator Department Brookhaven National Laboratory Upton New York 11973-5000 USA Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing 102413 People’s Republic of China Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA University of California-Riverside Riverside California 92521 USA Baruch College City University of New York New York New York 10010 USA PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad region 188300 Russia University of Colorado Boulder Colorado 80309 USA Physics and Astronomy Department Uni

The jet cross section and jet-substructure observables in p+p collisions at s=200 GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-kt algorithm with a jet radius of R=0.3 for jets with transverse momentum within 8.0

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The development of virtual laboratory on fluid materials

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Journal of physics: Conference Series 2019年第5期1280卷

作者： E D Jannati A Setiawan P Siahaan C Rochman D Susanti Y Samantha Mechanical Engineering Study Program Majalengka University Majalengka Indonesia Department of Mechanical Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia Department of Physics Education Universitas Pendidikan Indonesia Bandung Indonesia Department of Physics Education UIN Sunan Gunung Djati Bandung Indonesia Department of Informatics Engineering Majalengka University Majalengka Indonesia

This study aims to study the development of laboratory learning media on the concept of fluids. The method used in this study is the research and development (R & D) method of implementation up to step 7, namely: (1) literature study, (2) needs analysis, (3) design of virtual lab learning media, (4) development of lab learning media virtual, (5) validation, (6) product testing, (7) product revision. Virtual laboratory learning media, have gone through a phase validation test by two material experts and one media expert who showed that laboratory learning media on fluid materials are feasible to be applied in learning. the results of sponsored pretest and posttest for students showed a significant increase. Recommended to be applied in a virtual learning laboratory is suitable to be applied in the Faculty of engineering, Majalengka University.

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Evolution leads to a diversity of motion-detection neuronal circuits

arXiv

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arXiv 2018年

作者： Tehrani-Saleh, Ali LaBar, Thomas Adami, Christoph Department of Computer Science and Engineering BEACON Center for the Study of Evolution in Action Department of Microbiology and Molecular Genetics Program in Ecology Evolutionary Biology and Behavior Department of Physics and Astronomy Michigan State University East LansingMI48824 United States

A central goal of evolutionary biology is to explain the origins and distribution of diversity across life. Beyond species or genetic diversity, we also observe diversity in the circuits (genetic or otherwise) underlying complex functional traits. However, while the theory behind the origins and maintenance of genetic and species diversity has been studied for decades, theory concerning the origin of diverse functional circuits is still in its infancy. It is not known how many different circuit structures can implement any given function, which evolutionary factors lead to different circuits, and whether the evolution of a particular circuit was due to adaptive or non-adaptive processes. Here, we use digital experimental evolution to study the diversity of neural circuits that encode motion detection in digital (artificial) brains. We find that evolution leads to an enormous diversity of potential neural architectures encoding motion detection circuits, even for circuits encoding the exact same function. Evolved circuits vary in both redundancy and complexity (as previously found in genetic circuits) suggesting that similar evolutionary principles underlie circuit formation using any substrate. We also show that a simple (designed) motion detection circuit that is optimally-adapted gains in complexity when evolved further, and that selection for mutational robustness led this gain in complexity. Copyright © 2018, The Authors. All rights reserved.

关键词： Motion analysis

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A first-principles study on the quantum tunneling of methylhydroxycarbene isomerization in various solvents

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Journal of physics: Conference Series 2020年第1期1568卷

作者： E D Susanti F Rusydi I Puspitasari R N Fadilla N D Aisyah A Ahmad Research Center for Quantum Engineering Design Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia Department of Physics Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia Visiting Researcher at Precision Sciences & Technology and Applied Physics Graduate School of Engineering Osaka University Suita 565-0871 Japan Information System Study Program Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia School of Chemical Science and Food Technology Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Selangor 43600 Malaysia

Quantum tunneling phenomenon allows a high-barrier reaction to occur even though thermal energy is not sufficient to surmount the barrier. The phenomenon has been suggested to exist in the isomerization of methylhydroxycarbene which occured at 11 K. Here we study the quantum tunneling that occured in the isomerization of methylhydroxycarbene to acetaldehyde and to vinyl alcohol based on density functional calculations. The isomerization pathways are determined under the effect of various solvents which are modeled by polarizable continuum model (PCM). We use Wentzel-Kramers-Brillouin (WKB) approximation to calculate the tunneling probability (T) and extend the usefulness of T into isomerization rate. The results show that the solvents give a significant effect on the isomerization rate of methylhydroxycarbene to acetaldehyde but an insignificant one on the isomerization rate to vinyl alcohol.

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Report of the Topical Group on Cosmic Probes of Fundamental physics for for Snowmass 2021

arXiv

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arXiv 2022年

作者： Adhikari, Rana X. Anchordoqui, Luis A. Fang, Ke Sathyaprakash, B.S. Tollefson, Kirsten Lewis, Tiffany R. Engel, Kristi Aboubrahim, Amin Akarsu, Özgür Akrami, Yashar Aloisio, Roberto Batista, Rafael Alves Ballardini, Mario Ballmer, Stefan W. Bechtol, Ellen Benisty, David Berti, Emanuele Birrer, Simon Bonilla, Alexander Brito, Richard Bustamante, Mauricio Caldwell, Robert Cardoso, Vitor Chakrabarti, Sukanya Chen, Thomas Y. Cicoli, Michele Clesse, Sebastien Coleman, Alan Cui, Yanou Cusin, Giulia Daylan, Tansu Dienes, Keith R. Valentino, Eleonora Di Dvorkin, Cora Escamilla-Rivera, Celia Farrar, Glennys R. Feng, Jonathan L. Frusciante, Noemi García-Bellido, Juan Canal, Carlos García Garzelli, Maria Vittoria Glombitza, Jonas Golup, Geraldina Gritsevich, Maria Haiman, Zoltan Haro, Jaume Hazra, Dhiraj Kumar Heavens, Alan Holz, Daniel Hörandel, Jörg R. Ishak, Mustapha Ivanov, Mikhail M. Joudaki, Shahab Kampert, Karl-Heinz C.M., Karwin R., Keeley M., Klasen R., Konoplich J.F., Krizmanic S., Kumar N., Levi B., L’Huillier V., Mandic V., Marra C.J.A.P., Martins S., Matarrese E., Mayotte S., Mayotte L., Mersini-Houghton J., Meyers A.L., Miller E., Mottola S., Mukherjee K., Murase M.S., Muzio P., Nath K.K.Y., Ng J.M., No R.C., Nunes A.V., Olinto F., Pace S., Pan S.E., Perez Bergliaffa L., Pogosian J., Read M., Reininghaus M.H., Reno A.G., Riess M., Sakellariadou A.S., Sakharov P., Salucci M., Santander E., Santos F., Sarazin E.N., Saridakis S.J., Sciutto A., Shafieloo D.H., Shoemaker K., Sinha D., Soldin J.F., Soriano D., Staicova L., Sun D.A., Steer B., Thomas J.A., Tomsick V.B., Valera J.A., Vazquez T.M., Venters L., Visinelli S., Watson J.K., Webb A., Weltman S., Wissel A.K., Yadav F., Yang W., Yang N., Yunes A., Yushkov H., Zhang Division of Physics Math and Astronomy California Institute of Technology PasadenaCA91125 United States Department of Physics and Astronomy Lehman College City University of New York Bronx NY10468 United States Department of Physics Graduate Center City University of New York NY10016 United States Department of Astrophysics American Museum of Natural History NY10024 United States Department of Physics Wisconsin IceCube Particle Astrophysics Center University of Wisconsin MadisonWI53706 United States Institute for Gravitation and the Cosmos Department of Physics Pennsylvania State University University Park PA16802 United States Department of Astronomy & Astrophysics Pennsylvania State University University Park PA16802 United States School of Physics and Astronomy Cardiff University CardiffCF24 3AA United Kingdom Department of Physics & Astronomy Michigan State University East LansingMI48823 United States NASA Postdoctoral Program Astroparticle Physics Lab Goddard Space Flight Center GreenbeltMD20771 United States University of Maryland College ParkMD20742 United States Physics Division Los Alamos National Laboratory Los AlamosNM87545 United States University of Münster Germany Istanbul Technical University Turkey Case Western Reserve University Imperial College London United Kingdom Gran Sasso Science Institute Italy Instituto de Física Teórica UAM-CSIC Spain University of Ferrara Italy Syracuse University United States University of Wisconsin-Madison United States University of Cambridge United Kingdom Johns Hopkins University United States Stanford University United States Universidade Federal de Juiz de Fora Brazil Instituto Superior Técnico Portugal Niels Bohr Institute University of Copenhagen Denmark Dartmouth College United States Técnico Lisbon and Niels Bohr Institute Denmark University of Alabama Huntsville United States Columbia University United States Università di Bologna Italy Université Libre de Bruxelles Belgiu

Cosmic Probes of Fundamental physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) and gravitational waves. Already today, these probes give access to fundamental physics not available by any other means, helping elucidate the underlying theory that completes the Standard Model. The last decade has witnessed a revolution of exciting discoveries such as the detection of high-energy neutrinos and gravitational waves. The scope for major developments in the next decades is dramatic, as we detail in this report. Copyright © 2022, The Authors. All rights reserved.

关键词： Gravity waves

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Preparation of Nanocellulose-Alginate Nanocomposites for Chlorhexidine Digluconate Drug Carrier

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IOP Conference Series: Materials Science and engineering 2019年第1期547卷

作者： Angela Evelyna Tiara Khumaira Astifanni Imelda Ruth Lia Asri Bambang Sunendar Purwasasmita Faculty of Dentistry Maranatha Christian University Indonesia Materials Science and Engineering Bandung Institute of Technology Indonesia Advanced Materials Processing Group Engineering Physics Study Program Bandung Institute of Technology Indonesia Research Center for Nanosciences and Nanotechnology Bandung Institute of Technology Indonesia.

Root canal treatment failures generally caused by microorganisms that have ability to invade dentinal tubules. Chlorhexidine is widely known to effectively eradicate broad spectrum bacteria that infected dentinal tubules. The delivery of chlorhexidine to the infected site of root canal still becomes an issue. In order to increase the stability and to regulate the release of chlorhexidine, encapsulation of chlorhexidine digluconate was conducted by employing nanocellulose and alginate nanocomposites. Nanocellulose was prepared from palm kernel cake using acid hydrolysis method. Transmission electron microscopy images showed the formation of whisker and fiber nanocellulose with the average diameter of 20 nm. Resulting nanocellulose was combined with alginate in the presence of Ca2+ crosslinker. Scanning electron microscopy images displayed sphere and oval morphologies of microcapsules with diameter of 500 nm. The microcapsules were further loaded with chlorhexidine digluconate 2% (w/v). In vitro drug release properties were evaluated in PBS at pH 7.4 (normal tooth environment) and at pH 5.5 (infected tooth environment). The UV-VIS results showed that chlorhexidine digluconate has higher release rate at pH 5.5 than at pH 7.4, suggesting that the microcapsule is a good candidate for the delivery of chlorhexidine digluconate to the infected root canal tooth environment.

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