Date:
30 May 2016
Description:

Wing deformation can improve the performance of flapping wing MAV. Although this can be achieved through passive wing deformation, it is not possible to tune the deformation easily to obtain maximum performance . . .

Date:
25 Jan 2016
Description:

Fuel usage is an important driver of anthropogenic aerosol emissions. In Asia, it is possible that aerosol emissions may increase if business continues as usual, with economic growth driving an increase in coal burning . . .

Date:
07 Nov 2015
Description:

Cell surface sialylation is associated with tumor cell invasiveness in many cancers. Glioblastoma is the most malignant primary brain tumor and is highly infiltrative...

Date:
28 Aug 2015
Description:

Various novel hypercrosslinked porous polymers with phosphonium salt incorporated into their networks were developed . . .

Date:
21 Aug 2015
Description:

Artificial fertilisation of the ocean has been proposed as a possible geoengineering method for removing carbon dioxide from the atmosphere. The associated increase in marine primary productivity may lead to an increase in emissions of dimethyl sulphide (DMS), the primary source of sulphate aerosol over remote ocean regions, potentially causing direct and cloud-related indirect aerosol effects on climate . . .

Date:
16 Jun 2015
Description:

A new type of imidazolium salt-modified porous hypercrosslinked polymer (BET surface area up to 926 m2 g−1) was reported . . .

Date:
21 Apr 2015
Description:

A three-dimensional numerical simulation of a four-wing (two wings on each side, one on top of another) flapping micro-aerial vehicle (FMAV), known as the Delfly micro, is performed using an immersed boundary method Navier–Stokes finite volume solver at Reynolds numbers of 5500 (forward flight condition) . . .

Date:
23 Feb 2015
Description:

Compact electrical sources of surface plasmon polaritons (SPPs) are promising for integration with high-speed electronics. Being a highly compact source, the point dipole has the ability to directly couple to surface plasmon modes, and be electrically driven through the inelastic tunneling of electrons, for example, at the tip of a scanning tunneling microscope (STM) . . .

Date:
06 Feb 2015
Description:

Large-scale storage of renewable energy in the form of hydrogen (H2) fuel via electrolytic water splitting requires  the  develop- ment of water oxidation catalysts that are efficient and abundant ...

Date:
18 Nov 2014
Description:

A point dipole source models the electrical excitation of surface plasmon polaritons (SPPs), and is promising as a compact source for the beaming of plasmons in optical nanocircuits. However, conventional design approaches rely on iterative numerical simulations to achieve beaming from dipole sources, and they consume significant computing resources. Here, we introduce a universal semianalytical approach to solve the reflection of dipole-excited SPPs from the edge of a metal film by developing the image dipole method for SPPs . . .

Date:
29 Sep 2014
Description:

The synthesis of an N-heterocyclic silylene-stabilized digermanium(0) complex is described. The reaction of the amidinate-stabilized silicon(II) amide [LSiN(SiMe3)2](1; L = PhC(NtBu)2) with GeCl2·dioxane in toluene afforded the SiII–GeII adduct [L{(Me3Si)2N}Si!GeCl2](2) . . .

Date:
30 Jul 2014
Description:

Nanoglasses (NGs), metallic glasses (MGs) with a nanoscale grain structure, have the potential to considerably increase the ductility of traditional MGs while retaining their outstanding mechanical properties . . .

Date:
06 Jun 2014
Description:

Investigating congestion in train rapid transit systems (RTS) in today's urban cities is a challenge compounded by limited data availability and difficulties in model validation. Here, we integrate information from travel smart card data, a mathematical model of route choice, and a full-scale agent-based model of the Singapore RTS to provide a more comprehensive understanding of the congestion dynamics than can be obtained through analytical modelling alone . . .

Date:
26 Aug 2013
Description:

The intrinsic stacking fault energy (SFE) of copper under volumetric, longitudinal, and shear strains is investigated using density functional theory (GGA-PBE). Calculations are performed using a copper slab model aligned perpendicular to the (111) intrinsic stacking fault plane. The calculated SFE for unstrained copper is ? = 41 mJ/m2. Results show a strong dependence of ? on strain and distinct behavior for different types of strain: (a) volumetric and longitudinal in the direction perpendicular to the stacking fault, (b) longitudinal parallel to the stacking fault, and (c) shear parallel to the stacking fault . . .

Date:
22 Aug 2013
Description:

Cyclostomes, comprising jawless vertebrates such as lampreys and hagfishes, are the sister group of living jawed vertebrates (gnathostomes) and hence an important group for understanding the origin and diversity of vertebrates. In vertebrates and other metazoans, Hox genes determine cell fate along the anteroposterior axis of embryos and are implicated in driving morphological diversity. Invertebrates contain a single Hox cluster (either intact or fragmented), whereas elephant shark, coelacanth, and tetrapods contain four Hox clusters owing to two rounds of wholegenome duplication (“1R” and “2R”) during early vertebrate evolution . . .

Date:
16 Aug 2013
Description:

We perform large-scale molecular dynamics simulations on diamond-like carbon to study wear mechanism and law at the nanoscale . . .

Date:
04 Jun 2013
Description:

Theoretical calculations employed to investigate the diastereoselectivity of isoxazolidines and bicyclic [3,3,0]-isoxazolidines, obtained from the a,a-diphenylprolinol trimethylsilyl ether-catalyzed threecomponent domino reactions, revealed two different functions of the catalyst...

Date:
07 Mar 2013
Description:

The adsorption of CO on Ag(110) was recently explained using substrate mediated intermolecular interactions, but the underlying mechanism remains unclear. This study investigates both short- and longrange relaxation patterns for CO adsorption on Ag(110) surfaces and suggests that the relaxation mode can be explained by the interaction of heavy electrons on metal substrates in electron momentum space . . .

Date:
20 Nov 2012
Description:

A promising remedy to the failure of metallic glasses (MGs) by shear banding is the use of a dense network of glass-glass interfaces, i.e., a nanoglass (NG). Here we investigate the effect of grain size (d) on the failure of NG by performing molecular dynamics simulations of tensile-loading on Cu50Zr50 NG with d = 5 to 15 nm. Our results reveal a drastic change in deformation mode from a single shear band (d ∼ 15 to 10 nm), to cooperative shear failure (d ∼ 10 to 5 nm), to homogeneous superplastic flow (d ≤ 5 nm). Our results suggest that grain size can be an effective design parameter to tune the mechanical properties of MGs.

Date:
09 May 2011
Description:

Integrins are transmembrane (TM) proteins that mediate bidirectional mechanical signaling between the extracellular matrix and the cellular cytoskeletal network. Each integrin molecule consists of non-covalently associated a- and b-subunits, with each subunit consisting of a large ectodomain, a singlepass TM helix, and a short cytoplasmic tail. Previously we found evidence for a polar interaction (hydrogen bond) in the outer membrane clasp (OMC) of the leukocyte integrin aLb2 TMs that is absent in the platelet integrin aIIbb3 OMC . . .

View More