Three parallel algorithms for classical molecular dynamics are presented. The first assigns each processor a fixed subset of atoms; the second assigns each a fixed subset of inter-atomic forces to compute; the third assigns each a fixed spatial region. The algorithms are suitable for molecular dynamics models which can be difficult to parallelize efficiently—those with short-range forces where the neighbors of each atom change rapidly. They can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors. The algorithms are tested on a standard Lennard-Jones benchmark problem for system sizes ranging from 500 to 100,000,000 atoms on several parallel supercomputers--the nCUBE 2, Intel iPSC/860 and Paragon, and Cray T3D. Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems. For large problems, the spatial algorithm achieves parallel efficiencies of 90% and a 1840-node Intel Paragon performs up to 165 faster than a single Cray C9O processor. Trade-offs between the three algorithms and guidelines for adapting them to more complex molecular dynamics simulations are also discussed.

Fast parallel algorithms for short-range molecular dynamics

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

“Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks”の学習報告

Since the discovery of mechanically exfoliated graphene in 2004, research on ultrathin two-dimensional (2D) nanomaterials has grown exponentially in the fields of condensed matter physics, material science, chemistry, and nanotechnology. Highlighting their compelling physical, chemical, electronic, and optical properties, as well as their various potential applications, in this Review, we summarize the state-of-art progress on the ultrathin 2D nanomaterials with a particular emphasis on their recent advances. First, we introduce the unique advances on ultrathin 2D nanomaterials, followed by the description of their composition and crystal structures. The assortments of their synthetic methods are then summarized, including insights on their advantages and limitations, alongside some recommendations on suitable characterization techniques. We also discuss in detail the utilization of these ultrathin 2D nanomaterials for wide ranges of potential applications among the electronics/optoelectronics, electrocat...

Recent Advances in Ultrathin Two-Dimensional Nanomaterials

BiFeO3 is perhaps the only material that is both magnetic and a strong ferroelectric at room temperature. As a result, it has had an impact on the field of multiferroics that is comparable to that of yttrium barium copper oxide (YBCO) on superconductors, with hundreds of publications devoted to it in the past few years. In this Review, we try to summarize both the basic physics and unresolved aspects of BiFeO3 (which are still being discovered with several new phase transitions reported in the past few months) and device applications, which center on spintronics and memory devices that can be addressed both electrically and magnetically.

Physics and Applications of Bismuth Ferrite

PURPOSE: A transparent conductive composition is provided to have excellent conductivity, low resistance, and optical transmittance by doping with a specific composition ratio. CONSTITUTION: A transparent conductive composition comprises a composition with a chemical formula of AlxZn(1-x)O. In the chemical formula, 0.04 <= x <= 0.063. A target for a transparent conductive thin film comprises the composition with the chemical formula. The transparent thin film comprises a composition with the chemical formula and has a light transmittance of 90% or more and a resistivity of 10^(-3) Ω·cm or less. A manufacturing method of the transparent thin film comprises a step of obtaining the target and a step of evaporating the target by sputtering at room temperature.

Transparent conductive composition and target, transparent conductive thin film and method for producing the same using the target

C2+ Products Electrochemical conversion of CO2 is a promising method to decrease the CO2 level in the atmosphere for relieving the global warming problem. Article number 2205765 by Ho Won Jang, Soo Young Kim, Sang Hyun Ahn, and co-workers summarizes recent progress in the conversion of CO2 to C2+ products via electrochemical, photochemical, and photoelectrochemical reduction reaction; these are analysed based on the types of products, comprehension of catalysts, improvement of selectivity, and future direction. 

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smll.202370105

Recent Advances in Electrochemical, Photochemical, and Photoelectrochemical Reduction of CO
 2
 to C
 2+
 Products (Small 16/2023)

Catalysis: Dominance of Plasmonic Resonant Energy Transfer over Direct Electron Transfer in Substantially Enhanced Water Oxidation Activity of BiVO4 by Shape-Controlled Au Nanoparticles (Small 37/2017)

Graphene Oxide: Microscopic Evidence for Strong Interaction between Pd and Graphene Oxide that Results in Metal‐Decoration‐Induced Reduction of Graphene Oxide (Adv. Mater. 15/2017)

PURPOSE: A method for manufacturing a nano-structured compound thermoelectric semiconductor by a metal organic chemical vapor deposition method is provided to economically increase a thermoelectric index of a thermoelectric element CONSTITUTION: A metal organic compound precursor is transferred to a reaction tube(S01) The metal organic compound precursor is thermally decomposed(S02) The thermally decomposed precursor is crystallized by a nano size unit(S03) The crystallized precursor is applied on a substrate to form a thin film or a thick film(S04)

Ho Won Jang

Papers

Transparent conductive composition and target, transparent conductive thin film and method for producing the same using the target

Recent Advances in Electrochemical, Photochemical, and Photoelectrochemical Reduction of CO 2 to C 2+ Products (Small 16/2023)

Catalysis: Dominance of Plasmonic Resonant Energy Transfer over Direct Electron Transfer in Substantially Enhanced Water Oxidation Activity of BiVO4 by Shape-Controlled Au Nanoparticles (Small 37/2017)

Graphene Oxide: Microscopic Evidence for Strong Interaction between Pd and Graphene Oxide that Results in Metal‐Decoration‐Induced Reduction of Graphene Oxide (Adv. Mater. 15/2017)

Manufacturing process of nano-structured compound thermoelectric materials using metal organic chemical vapor deposition