There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

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

抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

A microbial battery is provided. At the anode, microbial activity provides electrons to an external circuit. The cathode is a solid state composition capable of receiving the electrons from the external circuit and changing from an oxidized cathode composition to a reduced cathode composition. Thus, no external source of oxygen is needed at the cathode, unlike conventional microbial fuel cells. The cathode can be removed from the microbial battery, re-oxidized in a separate oxidation process, and then replaced in the microbial battery. This regeneration of the cathode amounts to recharging the microbial battery.

Microbial batteries with re-oxidizable solid-state electrodes for conversion of chemical potential energy into electrical energy

To increase the hydration reaction rate and the amount of hydration products, different types and proportions of acids were mixed into mortars. The effects of the acid type and content on the early compressive strength of cement-based materials and the strengthening mechanism were assessed via X-ray diffraction and Fourier-transform infrared spectrum analyses. The addition of acetic acid or hydrochloric acid significantly increased the compressive strength of mortars at 1 d and 3 d, and slightly increased it at 28 d. With increasing acetic acid content, the strengthening effect increased first and then decreased with the best content at 4%. With increasing hydrochloric acid content, the strengthening effect decreased gradually with the best content at 2%.

/pdf/compressive-strength-enhancement-in-early-age-acid-activated-19ozc5vx.pdf

Compressive Strength Enhancement in Early Age Acid Activated Mortars: Mechanical Properties and Analysis

Correspondence Yi Cui, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025. Email: yicui@stanford.edu Abstract Double-sided metal-oxide-semiconductor field-effect-transistor processing is demonstrated for the first time on an ultrathin crystalline silicon substrate of 6-20 μm in a 100 mm diameter wafer format without a carrier wafer, the thinnest freestanding silicon wafers ever fabricated. The compatibility of the flexible material with conventional semiconductor processing tools is enabled by supporting an interior ultrathin silicon with a surrounding thicker ring of silicon. Currentvoltage characteristics of transistors on ultrathin silicon show performance as expected from bulk silicon, with electron mobility ~1500 cm V second. Mechanical measurements quantify the handleability.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/inf2.12087

Double‐sided transistor device processability of carrierless ultrathin silicon wafers

Described here is a solid-state lithium-ion battery, comprising a cathode, an anode, and a solid-state electrolyte disposed between the cathode and the anode, wherein the electrolyte comprises a hexacyanometallate represented by AxPy[R(CN)6-wLw]z, wherein: A is at least one alkali metal cation, P is at least one transition metal cation, at least one post-transition metal cation, and/or at least one alkaline earth metal cation, R is at least one transition metal cation, L is an anion, x, y, and z are related based on electrical neutrality, x>0, y>0, z>0, and 0≤w≤6.

Hexacyanometallates as highly conducting solid electrolytes for batteries

/pdf/a-gradient-lithiophilic-lithiophobic-strategy-for-lithium-282qnnl7ri.pdf

Yi Cui

Papers

Microbial batteries with re-oxidizable solid-state electrodes for conversion of chemical potential energy into electrical energy

Compressive Strength Enhancement in Early Age Acid Activated Mortars: Mechanical Properties and Analysis

Double‐sided transistor device processability of carrierless ultrathin silicon wafers

Hexacyanometallates as highly conducting solid electrolytes for batteries

A Gradient Lithiophilic-Lithiophobic Strategy for Lithium Metal Anode Protection