An Analysis of Dangling Urbanites from the Plights of“Modern Job”in Seize the Day

Saul Bellow’s novel Seize the Day combines the psychological narrative of Jewish immigrants in the“Happy Age”of the United States and the daily life narrative of modern New York urbanites,revealing the living state of modern urbanites-powerless to the outside world,nowhere to live in the material and spiritual world.They have an unresolved personal pursuit and a“dangling”destiny,which alludes to the problems plaguing modern urban people and the decay of American society.By comparing the characteristics and fate of the protagonist Wilhelm with the character Job in the Bible,this article helps to deepen the understanding of the plights of the protagonist as“Modern Job”,and realize the influence of the American urban society on Jewishness and personal survival in that period.

Dangling Ligand Enables an Iron Hexa-Coordinated Molecular Catalyst for Water Oxidation by Photocatalysis

Photocatalytic water oxidation reaction by transition metal complexes remains a challenge because of their poor stability under irradiation,especially for earth-abundant metal catalysts.In this regard,ironbased water oxidation catalysts are prone to hydrolysis and/or dissociate the ligands to form nanoparticles under a real catalytic condition.Herein,we describe a unique hexa-coordinated catalyst 1[Fe^(II)(Py_(3)tacn)Cl_(2)]and its reference 2[Fe^(II)(PhPy_(2)tacn)Cl_(2)]with a dangling pyridyl ligand and a phenyl group,respectively.We anticipated that the dynamically open and close coordination behaviors of the pyridyl ligand enabled balance of the reactivity and stability of catalyst 1.To our delight,the“open form”of catalyst 1 provided a free coordination site,and the“close form”guaranteed its molecular integrity,resulting in a water oxidation reaction with high efficiency and robustness.The turnover number and turnover frequency values of 2332 and 60 s^(−1)are the highest known to date among iron-based homogeneous water oxidation systems under visible light irradiation.

外位结构的逻辑关系——汉译英时常被忽略的问题

外位结构（ＳｅｐａｒａｔｅＣｏｎｓｔｒｕｃｔｉｏｎ），是英语语言中的一种重要的句法手段。这种结构在英语语言里的应用随处可见。英语中常见的外位结构有：动词非谓语形式、形容词短语、介词短语、名词短语、状语从句省略形式等。这些结构的应用，能够使得语言表达达...

Influence of Rinse on Self-Activated Luminescence in ZnS Nanocrystallite

The self-activated (SA) luminescence in ZnS nanoparticles was studied by comparing the UV-light irradiation induced spectral change, Raman spectra, and EPR spectra of the un-rinsed and rinsed samples. The results show that the SA centers prefer to occupy the sites near the surface and that the donor of SA emission may be related to organic functional groups such as -OH, -CH 3, and -COO. The EPR signals are enhanced remarkably in the rinsed nanoparticles comparing with that in the un-rinsed ones. It is believed that organic functional groups physically combine with the surface dangling bonds of ZnS nanoparticles, leading the nonradiative transition channels to decrease, and thus the SA emission to increase.

Mechanism and enhancement of photoluminescence from silicon nanocrystals implanted in SiO_2 matrix

Photoluminescence （PL） spectra of Si nanocrystals （NCs） prepared by 130 keV Si ions implantation onto SiO2 matrix were investigated as a function of annealing temperature and implanted ion dose. PL spectra consist of two PL peaks, originated from smaller Si NCs due to quantum confinement effect （QCE） and the interface states located at the surface of larger Si NCs. The evolution of number of dangling bonds （DBs） on Si NCs was also investigated. For bydrogen-passivated samples, a monotonic increase in PL peak intensity with the dose of implanted Si ions up to 3× 10^17 ions/cm^2 is observed. The number of DBs on individual Si NC, the interaction between DBs at the surface of neighbouring Si NCs and their effects on the efficiency of PL are discussed.

Conductive Properties of Electron Beam Evaporated a-Si_(1-x) Gd_x Films

The properties of temperature dependence of conductivity σ of electron beam evaporated a-Si_(1-x)Gd_x films which was deposited on some substrates of glass and Al-foil at a substrate temperature of approximately 300℃ in a background pressure about 2×10^(-4) Pa with a deposition speed about 0.2 nm/s was analyzed and studied.The forms of Gd^(3+) ions in the films,the dangling bond compensation achieved by Gd^(3+) ions and the impurity states compensation achieved by structural disorder aroused by doping Gd ele- ment into a-Si film could be the key factors in resolving the properties of conduction in a-Si_(1-x)Gd_x films.In the temperature region of 290 K<T<500 K,an analysis of conductivity allows to reveal two conductivity regions:(1)conducting conduction of the carriers excited to conductive band,(2)hopping conduction of the carriers in the impurity band near E_F level thermo-excited.

Surface energetic and bonding characteristics of tetrahexahedral platinum nanocrystals enclosed by high-index facets

This paper uses a molecular static approach with a many-body potential to investigate the surface energetic and bonding characteristics of tetrahexahedral platinum nanocrystals enclosed by high-index facets such as {210}, {310}, {410}, {520} and {730}. It mainly focuses on the effect of crystal size and surface Miller index on these characteristics. The results show that the surface energy and dangling bond density increase with decreasing diameter of tetrahexahedral nanocrystals and generally show an order of {210} 〉{730}〉 {520} 〉 {310} 〉 {410}. However, this order is not valid at crystal sizes below 7 nm or so. The results of corresponding surfaces are also presented for comparison.

Relative enhancement of photoluminescence intensity of passivated silicon nanocrystals in a silicon dioxide matrix

Photoluminescence （PL） intensity of passivated silicon nanocrystals （Si NCs） embedded in a SiO2 matrix is com- pared with that of unpassivated Si NCs. We investigate the relative enhancement of PL intensity （IR） as a function of annealing temperature and implanted Si ion dose. The IR increases simultaneously with the annealing temperature. This demonstrates an increase in the number of dangling bonds （DBs） with the degree of Si crystallization varying via the annealing temperature. The increase in IR with implanted Si ion dose is also observed. We believe that the near-field interaction between DBs and neighboring Si NCs is an additional factor that reduces the PL efficiency of unpassivated Si NCs.

Covalent electron density analysis and surface energy calculation of gold with the empirical electron surface model

Based on the empirical electron surface model （EESM）,the covalent electron density of dangling bonds （CEDDB） was calculated for various crystal planes of gold,and the surface energy was calculated further.Calculation results show that CEDDB has a great influence on the surface energy of various index surfaces and the anisotropy of the surface.The calculated surface energy is in agreement with experimental and other theoretical values.The calculated surface energy of the close-packed （111） surface has the lowest surface energy,which agrees with the theoretical prediction.Also,it is found that the spatial distribution of covalent bonds has a great influence on the surface energy of various index surfaces.Therefore,CEDDB should be a suitable parameter to describe and quantify the dangling bonds and surface energy of various crystal surfaces.

HIGH TEMPERATURE ESR PROPERTIES OF P, B-DOPED a-Si_(1-x)C_x:H FILMS

Ⅰ. INTRODUCTION Hydrogenated amorphous silicon-carbon (a-Si1-xCx:H) film is an important amorphous photoelectric semiconductor material having a wide and variable band gap. It reduces the interface reflection and surface absorption of incident light when it

Studies on Fluorescence Spectra of Laser-Prepared Nanometer Silicon Nitride

Since the beginning of the 1980’s, we have been studying the physical properties of laserprepared nanometer silicon nitride by a series of experiments, and observed many new physical phenomena such as the distortion of the infrared absorption peaks, the full infrared absorption and the distortion of Raman shift. In this note, we study the fluorescence spectra of laser-prepared nanometer amorphous silicon nitride powder and bulk for the first time,

Curing theory of A_f-A_g type free radical polymerization (Ⅱ)——Characterization of network structural parameters

By means of the polymer statistical theory, the A_f-A_g type nonlinear free radical polymerization is investigated to give the number of effective elastic chains, the number of effective elastic mers and the average length for the elastic chains. The corresponding quantities for the dangling chains, the number of effective cross-linkage and the modulus are also obtained. Furthermore, the number- and weight-fractions of elastic chains are deduced.

(NH_4)_2S treatment of the Si (100) surface and its effects on Al/Si Schottky barrier heights

The effect of Si （100） surface S passivation was investigated. A thick film with a high roughness value was formed on the Si surface treated by （NH4）2S solution, which was attributed to physical adsorption of S atoms. SEM and XPS analyses reveal that Si surface atoms were chemically bonded with S atoms after Si surface treatment in NH4OH and （NH4）2S mixing solution. This induces a more ideal value for the Schottky barrier height compared with a diode treated only by HF solution, indicating that surface states originating from dangling bonds are passivated with S atoms.

High thermal conductivity and remarkable damping composite gels as thermal interface materials for heat dissipation of chip

The emerging applications of composite gels as thermal interface ma-terials(TIMs)for chip heat dissipation in intelligent vehicle and wear-able devices require high thermal conductivity and remarkable damp-ing properties.However,thermal conductivity and damping proper-ties are usually correlated and coupled each other.Here,inspired by Maxwell theory and adhesion mechanism of gecko’s setae,we present a strategy to fabricate polydimethylsiloxane-based composite gels in-tegrating high thermal conductivity and remarkable damping prop-erties over a broad frequency and temperature range.The multiple relaxation modes of dangling chains and the dynamic interaction be-tween the dangling chains and aluminum fillers can efficiently dis-sipate the vibration energy,endowing the composite gels with ultra-high damping property(tanδ>0.3)over a broad frequency(0.01-100 Hz)and temperature range(-50-150°C),which exceeds typi-cal state-of-the-art damping materials.The dangling chains also com-fort to the interfaces between polymer matrix and aluminum via van der Waals interaction,resulting in high thermal conductivity(4.72±0.04 W m-1 K-1).Using the polydimethylsiloxane-based composite gel as TIMs,we demonstrate effective heat dissipation in chip oper-ating under vigorous vibrations.We believe that our strategy could be applied to a wide range of composite gels and lead to the devel-opment of high-performance composite gels as TIMs for chip heat dissipation.

A Survey of Detection Methods for Software Use-After-Free Vulnerability

Due to the absence of validity detection on pointers and automatic memory rubbish reclaim mechanisms in programming languages such as the C/C++language,software developed in these languages may have many memory safety vulnerabilities,such as Use-After-Free(UAF)vulnerability.An UAF vulnerability occurs when a memory object has been freed,but it can still be accessed through a dangling pointer that points to the object before it is reclaimed.Since UAF vulnerabilities are frequently exploited by malware which may lead to memory data leakage or corruption,much research work has been carried out to detect UAF vulnerabilities.This paper investigates existing UAF detection methods.After comparing and categorizing these methods,an outlook on the future development of UAF detection methods is provided.This has an important reference value for subsequent research on UAF detection.

Is It Right for Universities to Dangle Large Scholarships to Bag Top Students?

The recent years have seen Chinese universities, including prestigious ones, using various questionable tactics to attract top students after the college entrance examination. Large scholarships are one of them.