bluuebunny/crossref_metadata_2025 huggingface dataset:
Structural and magnetization crossover in electrodeposited FeAl2O4– effect ofin situoxidation
Authors: Mukhtar Fazeelat , Riaz Saira , Awan Attia , Rubab Fatima , Kayani Zohra N. , Naseem Shahzad
Published: November 2019

Amongst other spinels, iron aluminium oxide (FeAl2O4) exhibits exceptional chemical and physical properties.
Protein secondary structure prediction with context convolutional neural network
Authors: Long Shiyang , Tian Pu
Published: November 2019

Protein secondary structure prediction using context convolutional neural network.
Experimental and theoretical study of CO2 adsorption by activated clay using statistical physics modeling
Authors: Jedli Hedi , Briki Chaker , Chrouda Amani , Brahmi Jihed , Abassi Amel , Jbara Abdessalem , Slimi Khalifa , Jemni Abdelmajid
Published: November 2019

The objective of this paper was to study CO2 adsorption on activated clay in the framework of geological storage.
Curcumin alleviates LPS-induced inflammation and oxidative stress in mouse microglial BV2 cells by targeting miR-137-3p/NeuroD1
Authors: Gao Feng , Lei Jing , Zhang Zhaowei , Yang Yanling , You Haojun
Published: November 2019

Curcumin has been reported to exert protective effects on inflammation-related diseases, including spinal cord injury (SCI).
Graphdiyne bearing pillar[5]arene-reduced Au nanoparticles for enhanced catalytic performance towards the reduction of 4-nitrophenol and methylene blue
Authors: Tan Xiaoping , Xu Jianhua , Huang Ting , Wang Sheng , Yuan Maojie , Zhao Genfu
Published: November 2019

Application of a novel 2D heterogeneous hybrid nanomaterial based on graphdiyne and pillar[5]arene-reduced Au nanoparticles in catalyzing the reduction of 4-nitrophenol and methylene blue.
Simple preparation of graphene quantum dots with controllable surface states from graphite
Authors: Kang Sukhyun , Jeong Young Kyu , Jung Kyung Hwan , Son Yong , Choi Sung-Churl , An Gae Seok , Han Hyuksu , Kim Kang Min
Published: November 2019

The proposed technique enables selectively producing graphene quantum dots (on-GQDs) and graphene oxide quantum dots (off-GOQDs) by depending on the applying sonication during the pulsed laser ablation process.
Separation performance of p-tert-butyl(tetradecyloxy)calix[6]arene as a stationary phase for capillary gas chromatography
Authors: Sun Tao , Shuai Xiaomin , Chen Yujie , Zhao Xinyu , Song Qianqian , Ren Kaixin , Jiang Xingxing , Hu Shaoqiang , Cai Zhiqiang
Published: November 2019

This work presents the first example of the utilization of p-tert-butyl(tetradecyloxy)calix[6]arene (C6A-C10) as a stationary phase for capillary gas chromatographic (GC) separation.
Dynamic Halbach array magnet integrated microfluidic system for the continuous-flow separation of rare tumor cells
Authors: Xue Mei , Xiang An , Guo Yanhai , Wang Li , Wang Rou , Wang Wenwen , Ji Gang , Lu Zifan
Published: November 2019

We develop a dynamic Halbach array magnet integrated microfluidic system for continuous-flow separation of circulating tumor cells from whole blood.
Effects of 1,2-ethanedithiol concentration on performance improvement of quantum-dot LEDs
Authors: Nguyen Huu Tuan , Ryu Shin Young , Duong Anh Tuan , Lee Soonil
Published: November 2019

We report systematic efficiency improvement of green-emitting CdSe@ZnS quantum-dot LEDs with respect to the concentration of a 1,2-ethanedithiol solution used for in situ treatment.
Selective sensing and visualization of pesticides by ABW-type metal–organic framework based luminescent sensors
Authors: Di Ling , Xia Zhengqiang , Li Jian , Geng Zhongxing , Li Chun , Xing Yang , Yang Zhanxu
Published: November 2019

A novel ABW-type luminescent metal–organic framework was applied for selective visualization sensing of trace amounts of 2,6-dichloro-4-nitroaniline and vapor sensing of trifluralin.
g-C3N4/CuO and g-C3N4/Co3O4 nanohybrid structures as efficient electrode materials in symmetric supercapacitors
Authors: Kavil Jithesh , Anjana P. M. , Joshy Deepak , Babu Ameya , Raj Govind , Periyat P. , Rakhi R. B.
Published: November 2019

Comparison of electrochemical performance of symmetric supercapacitors based on g-C3N4/CuO and g-C3N4/Co3O4 electrodes.
Catalytic asymmetric hydrogenation of (Z)-α-dehydroamido boronate esters: direct route to alkyl-substituted α-amidoboronic esters
Authors: Lou Yazhou , Wang Jun , Gong Gelin , Guan Fanfu , Lu Jiaxiang , Wen Jialin , Zhang Xumu
Published: November 2019

The direct catalytic asymmetric hydrogenation of (Z)-α-dehydroamino boronate esters was realized.
Chiral cis-iron(ii) complexes with metal- and ligand-centered chirality for highly regio- and enantioselective alkylation of N-heteroaromatics
Authors: Wei Jinhu , Cao Bei , Tse Chun-Wai , Chang Xiao-Yong , Zhou Cong-Ying , Che Chi-Ming
Published: November 2019

A cis-β FeII complex having metal- and ligand-centered chirality catalyzes highly regio- and enantioselective alkylation of indoles (at the N1, C2, or C3 position), pyrroles and anilines with α,β-unsaturated 2-acyl imidazoles (48 examples, up to 99% ee).
Reduction of a dihydroboryl cation to a boryl anion and its air-stable, neutral hydroboryl radical through hydrogen shuttling
Authors: Hagspiel Stephan , Arrowsmith Merle , Fantuzzi Felipe , Hermann Alexander , Paprocki Valerie , Drescher Regina , Krummenacher Ivo , Braunschweig Holger
Published: November 2019

A doubly cyclic (alkyl)(amino)carbene-stabilised dihydroboronium cation undergoes fully reversible 2e− reduction to a stable hydroboryl anion via B-to-C hydrogen migration. Subsequent 1e− oxidation yields a bench-stable neutral hydroboryl radical.
A facile way to obtain near-infrared room-temperature phosphorescent soft materials based on Bodipy dyes
Authors: Zhang Ting , Ma Xiang , Tian He
Published: November 2019

Near-infrared room-temperature phosphorescence was achieved by employing iodine substituted Bodipy into amorphous polymers. The self-healable gels were also obtained with the incorporation of a crosslinker and quadruple hydrogen bond based moieties.
Bioinspired porous organic polymer-functionalized membranes for efficient CO2 capture
Authors: Wang Zhen , Zhang Yiming , Wang Jing , Zhang Yatao
Published: November 2019

Biomimetic enzyme loaded on porous organic polymers has used to develop mixed matrix membranes for efficient CO2 capture.
In situ TEM investigation of electron beam-induced ultrafast chemical lithiation for charging
Authors: Huang Guan-Min , Huang Chun-Wei , Kumar Nagesh , Huang Chih-Yang , Tseng Tseung-Yuen , Wu Wen-Wei
Published: November 2019

An innovative strategy for harvesting energy harvesting usingin anthe NiFe2O4/CNT nanocomposite as an electrode material NiFe2O4/CNTs is proposed in this study.
Open ZnSe/C nanocages: multi-hierarchy stress-buffer for boosting cycling stability in potassium-ion batteries
Authors: Chu Jianhua , Wang Wei (Alex) , Yu Qiyao , Lao Cheng-Yen , Zhang Lin , Xi Kai , Han Kun , Xing Lidong , Song Lei , Wang Min , Bao Yanping
Published: November 2019

The unique open ZnSe/C nanocages composed of sub-10 nm nanoparticles can dramatically reduce diffusion-induced stresses and enhance the structural integrity with multi-hierarchy stress-buffered effect, resulting in excellent cycle stability.
Photon-induced synthesis of ultrafine metal nanoparticles on graphene as electrocatalysts: impact of functionalization and doping
Authors: Guo Kun , Rowland Laura J. , Isherwood Liam H. , Glodan Gyorgyi , Baidak Aliaksandr
Published: November 2019

Utilizing reducing species generated by high-energy photons offers an alternative strategy to prepare metal nanoparticles (NPs) in the absence of a foreign reductant.
Correction: Brønsted acid mediated covalent organic framework membranes for efficient molecular separation
Authors: Wang Hongjian , Chen Long , Yang Hao , Wang Meidi , Yang Leixin , Du Haiyan , Cao Chenliang , Ren Yanxiong , Wu Yingzhen , Pan Fusheng , Jiang Zhongyi
Published: November 2019

Correction for ‘Brønsted acid mediated covalent organic framework membranes for efficient molecular separation’ by Hongjian Wang et al., J. Mater. Chem. A, 2019, 7, 20317–20324.
Development of agri-biomass based lignin derived zinc oxide nanocomposites as promising UV protectant-cum-antimicrobial agents
Authors: Kaur Ravneet , Thakur Neeraj Singh , Chandna Sanjam , Bhaumik Jayeeta
Published: November 2019

A green and one-step synthesis of agri-biomass lignin derived zinc oxide nanocomposites has been achieved, which exhibited excellent antimicrobial and UV-protection potential.
Turn-on fluorescent glutathione detection based on lucigenin and MnO2 nanosheets
Authors: Halawa Mohamed Ibrahim , Wu Fengxia , Zafar Muhammad Nadeem , Mostafa Islam M. , Abdussalam Abubakar , Han Shuang , Xu Guobao
Published: November 2019

A GSH sensing platform using lucigenin as a fluorescent probe in the presence of MnO2 nanosheets was reported for the first time.
The design and characterization of a hypersensitive glucose sensor: two enzymes co-fixed on a copper phosphate skeleton
Authors: Yuan Ye , Fu Zhendong , Wang Kai , Zhao Zhenyu , Li Hui , Wang Zhi , Wang Liping
Published: November 2019

A new glucose sensor GOx&DhHP-6–Cu3(PO4)2 showed the best catalytic ability at a neutral temperature and pH.
TCNQ as a volatilizable morphology modulator enables enhanced performance in non-fullerene organic solar cells
Authors: Yu Runnan , Yao Huifeng , Hong Ling , Gao Mengyuan , Ye Long , Hou Jianhui
Published: November 2019

New use of TCNQ as a volatilizable solid additive to optimize the morphology and improve the photovoltaic performance of non-fullerene-based OSCs.
Optimization of processing solvent and film morphology to achieve efficient non-fullerene polymer solar cells processed in air
Authors: An Kang , Zhong Wenkai , Ying Lei , Zhu Peng , Fan Baobing , Li Zhenye , Li Ning , Huang Fei , Cao Yong
Published: November 2019

Efficient non-fullerene polymer solar cells based on P2F-EHp and ITIC derivatives were achieved by blade-coating under the ambient air conditions.
A C@TiO2 yolk–shell heterostructure for synchronous photothermal–photocatalytic degradation of organic pollutants
Authors: Li Yong , Shen Qianqian , Guan Rongfeng , Xue Jinbo , Liu Xuguang , Jia Husheng , Xu Bingshe , Wu Yucheng
Published: November 2019

A novel approach integrates the hetero-interfacial charge carrier management, the photothermal excitation of the carbon sphere core and the injection of hot electrons into the TiO2 shells, consequently enhancing the visible light driven catalysis.
Stellar population astrophysics (SPA) with the TNG
Authors: D’Orazi V. , Oliva E. , Bragaglia A. , Frasca A. , Sanna N. , Biazzo K. , Casali G. , Desidera S. , Lucatello S. , Magrini L. , Origlia L.
Published: November 2019

Context. Open clusters exquisitely track the Galactic disc chemical properties and its time evolution; a substantial number of studies and large spectroscopic surveys focus mostly on the chemical content of relatively old clusters (age ≳ 1 Gyr). Interestingly, the less studied young counterpart populating the solar surrounding has been found to be solar (at most), with a notable surprising lack of young metal-rich objects. While there is wide consensus about the moderately above-solar composition of the Hyades cluster, the metallicity of Praesepe is still controversial. Recent studies suggest that these two clusters share identical chemical composition and age, but this conclusion is disputed.

Aims. With the aim of reassessing the metallicity of Praesepe, and its difference (if any) with the Hyades cluster, we present in this paper a spectroscopic investigation of ten solar-type dwarf members.

Methods. We exploited GIARPS at the TNG to acquire high-resolution, high-quality optical and near-IR spectra and derived stellar parameters, metallicity ([Fe/H]), light elements, α- and iron-peak elements, by using a strictly differential (line-by-line) approach. We also analysed in the very same way the solar spectrum and the Hyades solar analogue HD 28099.

Results. Our findings suggest that Praesepe is more metal-rich than the Hyades, at the level of Δ[Fe/H] = +0.05 ± 0.01 dex, with a mean value of [Fe/H] = +0.21 ± 0.01 dex. All the other elements scale with iron, as expected. This result seems to reject the hypothesis of a common origin for these two open clusters. Most importantly, Praesepe is currently the most metal-rich, young open cluster living in the solar neighbourhood.
Application of geophysical methods for the subsurface treatment of the Piekary highway junction in shallow mining terrain
Authors: Pilecki Zenon
Published: November 2019

The study presents the application of geophysical methods in the subsurface treatment of the A-1 highway in the area of the Piekary junction in the terrain of historic zinc and lead ore mining, in the northern part of the Upper Silesian Coal Basin in Poland (USCB). The study area was under threat of discontinuous deformations, mainly sinkholes. This threat resulted from the shallow exploitation of zinc and lead ores, as well as contemporary exploitation of coal seams at greater depths. An original methodology of subsurface treatment has been developed as an adaptation to the geophysical measurement results. The methodology uses the gravimetric method at the initial and final control stages, as well as the seismic and borehole georadar methods during the detailed evaluation stage. The results of the study allowed different categories of sinkhole hazard to be determined in the area of the Piekary junction. The scope of the liquidation works was selected to match the hazard levels. Blasting of varying intensities and the borehole injection of the filling material were performed. The combination of substrate treatment methodologies and highway construction protection systems have proved to be effective.
How will future health policy impact on regional disparities and healthcare in Latvia
Authors: Bikava Ieva , Kreituse Ilga
Published: November 2019

Latvia is a country with high level of regional disparities and as researches have approved – income, education, and environment significantly affect the status of people's health. The reforms in healthcare have been carried out under the flags of accessibility, efficiency, effectiveness, and quality since 1991. Some groups support the idea that the state should take over almost all services, the others claim that more responsibilities should be transferred to the private sector, and dispute on service provider network and financing system. In accordance with the coalition theory and legislation of Latvia, the initiators and designers of the structural reforms are politicians, elected by the citizens. In theory, every politician represents the political party with its ideology and vision that is expressed in the Programme of the party. Due to Parliament elections in 2018, to understand which way the country will go, and how the chosen strategy will impact on the regional disparities, analysis of the middle-term development strategy was made. Research results showed that political parties in Latvia are not based on the ideology and the strategical development vision of the State, so the development and changes made in legislation are mainly ad-hoc decisions or the result of lobbying activities of influential groups. Due to the lack of middle term vision as the gap between long-term development strategy and short-term decisions, unfortunately, the prognosis of future health politics leads to the conclusion that regional disparities and the problem with Health care accessibility in next decades will only rise.
Readiness of military personnel for high intensity combat training course
Authors: Plavina Liana , Smagare Silva , Cakstins Andris , Umbrasko Silvija
Published: November 2019

High standards of physical ability and health are essential for Military personnel and its career. Training of military personnel in field conditions is an essential process. The aim of the study was to evaluate readiness of cadets to high physical load during the combat training course (CTC). We carried out the following: evaluated posture status, analysed anthropometric characteristics, controlled parameters of musculoskeletal system such as muscle tone, muscle strength characteristics, and provided Nordic Questionnaire list containing a figure of Human Body, where a respondent marked the regions of musculoskeletal disorder (pain). All subjects gave their informed consent to the protocol approved by the local Medical Ethics Committee of Rıga Stradiņš University for biomedical research. Combat training course has duration of ten days and includes various physical, tactical, and psychological activities in military conditions that are a compulsory part of study process in National Defence Academy of Latvia. Cadets are facing complex challenges in tactical situations where they can approve their physical abilities, endurance and psychological persistence. They have dietary and sleeping deprivation during the course. We provided standardized Nordic Questionnaire for analysis and evaluation of musculoskeletal disorders in the study group and indicated main problematic regions with musculoskeletal symptoms. The general health status of participants was checked by medical specialists in military Medical Centre and advanced examination was done by Sports medicine doctor. The aim of the study is to analyse the posture status, foot status, to make muscle functional tests that allow managing pre-courses training program for CTC participants and optimizing adaptation of participants of the course to field condition of military training. Evaluating musculoskeletal symptoms cadets indicated that main problematical regions were lower back and knee. In 77% (42/54) of cases cadets with lower limb hyper-tonus had asymmetric posture in frontal plane. Analysis of anthropometric characteristics showed that body mass index changes were in the interval from 21.34 to 33.24. BMI value for 32.2% of participants corresponded to the standards of WHO recommendations. Analysis of posture and foot status was important for provision of preventive measures and reduction of the risk of health disorders related to high physical load in military environment. Persons with expressed asymmetry of posture and foot during dynamic load and static load can have overstress with high risk of health disorders, musculoskeletal pathology and psychological overload.
Private Partnership as a Global Trend of Digital Government
Authors: Sidorenko E.L. , Khisamova Z.I.
Published: November 2019

Currently, the concept of creating a digital government is firmly entrenched in the long-term development strategies of most countries of the world. However, the implementation of digital state projects requires capital investments to ensure the operation and maintenance of systems and technologies in a sustainable manner. Faced with excessive financial constraints, the governments of most countries were not able to fully provide open financial support for digital projects. In the context of budgetary savings and demand for improving the quality of public services, the search for innovative methods of financing projects has gained particular importance. This led to a steady global trend of public-private partnership in the provision of digital public services to the population. The purpose of this study was to identify the main trends in digitalization of the public administration system based on public-private partnerships, as well as to reveal the features and effectiveness of the implemented models. This study reveals the features of public-private partnership mechanisms, identifies the risks of such interaction, and presents examples of successful global practices to minimize these risks.
Endoscopic management of large ileocecal valve lesions over an 18-year interval
Authors: Ponugoti Prasanna L. , Broadley Heather M. , Garcia Jonathan , Rex Douglas K.
Published: November 2019

Background and study aims Ileocecal valve (ICV) lesions are challenging to remove endoscopically.

Patients and methods This was a retrospective cohort study, performed at an academic tertiary US hospital. Sessile polyps or flat ICV lesions ≥ 20 mm in size referred for endoscopic mucosal resection (EMR) were included. Successful resection rates, complication rates and recurrence were compared to lesions ≥ 20 mm in size not located on the ICV.

Results During an 18-year interval, there were 118 ICV lesions ≥ 20 mm with mean size 28.6 mm (44.9 % females; mean age 71.6 years), comprising 9.03 % of all referred polyps. Ninety ICV lesions (76.3 %) were resected endoscopically, compared to 91.3 % of non-ICV lesions (P < 0.001). However, in the most recent 8 years, successful EMR of ICV lesions increased to 93 %. Conventional adenomas comprised 92.2 % of ICV lesions and 7.8 % were serrated. Delayed hemorrhage and perforation occurred in 3.3 % and 0 % of ICV lesions, respectively, compared to 4.8 % and 0.5 % in the non-ICV group. At first follow-up, rates of residual polyp in the ICV and non-ICV groups were 16.5 % and 13.6 %, respectively (P = 0.485). At second follow-up residual rates in the ICV and non-ICV lesion groups were 18.6 % and 6.7 %, respectively (P = .005).

Conclusions Large ICV polyps are a common source of tertiary referrals. Over an 18-year experience, risk of EMR for ICV polyps was numerically lower, and risk of recurrence was numerically higher at first follow and significantly higher at second follow-up compared to non-ICV polyps.
Critical temperatures of real fluids from the extended law of corresponding states
Authors: González-Calderón Alfredo , Perera-Burgos Jorge Adrián , Luis D. P.
Published: November 2019

The extended law of corresponding states was proposed based on the patterns observed in the second virial coefficient for potential models of variable range. In this work, we propose the use of this law, together with a generalized Lennard-Jones (or approximate nonconformal, ANC) potential, to predict the critical temperatures of real fluids. To this end, we first observe that the temperatures obtained from the scaling law are in agreement with those obtained from molecular simulations of ANC fluids. For short ranges, however, validation is performed by mapping the ANC fluid to the square well fluid because no simulation data have been reported for the former fluid for these ranges. Overall, the analysis shows the validity of the scaling law and the ANC potential for predicting critical temperatures for any range. With this in mind, the well depths of the effective binary potentials of atoms and molecules are rescaled to apply a correction for the three-body nonadditive interaction in order to determine the critical temperatures of fluids.
Power-law fluids over a viscous sheet with mass suction/blowing: Multiple solutions
Authors: Yao Chanjuan , Li Botong , Wei Hai-Rui , Lu Junjie
Published: November 2019

Multiple states emerge in the fluid flow with certain or sudden external interference. In this paper, multiple solutions of the velocity and temperature distributions of power-law fluids are found when the fluid is flowing through a viscous sheet with suction or blowing. By coupling the sheet dynamics with the surrounding fluid equations by the stress balance, the investigation results shed some light on many engineering applications of flow on various soft surfaces, for example, the synthetic plastics. The present research considers the nonuniformity of the mass suction or blowing effects, which is connected with both the stretching velocity and the thickness of the sheet. A similar transformation is adopted to transform the boundary layer equations into a series of ordinary differential equations, and multiple solutions are obtained. The existence of similar solutions has some limitations. The multiple solutions of the friction coefficient and the generalized Nusselt number affected by the power-law index n and the suction/blowing rate fw are shown, and we also discuss the influence of the generalized Prandtl number Npr and the Eckert number Ec on the velocity and temperature distributions.
Language patterns and attitude revisited
Authors: Su Hang , Hunston Susan
Published: November 2019

This paper investigates the association between language patterns and attitudinal meanings, focusing specifically on adjective complementation patterns and types of attitudes as proposed in the Appraisal framework (Martin & White 2005). The investigation shows that the tripartite division of Attitude into Affect, Judgement and Appreciation can be supported with pattern differentials. The detailed scrutiny of adjective patterns with respect to theattitudesystem supportsBednarek’s (2009)argument that both aspects of attitudinal lexis (emotion or opinion lexis) and attitudinal target (the entity being evaluated) should be considered in analysing appraisal expressions, which leads to the proposal that Appraisal is in essence instantiated by choices made simultaneously in terms of the attitudinal lexis that is used and the attitudinal target that is involved.
Changes in the physicochemical properties of fish cell membranes during cellular senescence
Authors: Shiomi Akifumi , Nagao Kohjiro , Kasai Hisae , Hara Yuji , Umeda Masato
Published: November 2019

Fish cell lines are widely used for the studies of developmental biology, virology, biology of aging, and nutrition physiology. However, little is known about their physicochemical properties. Here, we report the phospholipid compositions and mechanical properties of cell membranes derived from freshwater, anadromous and marine fish species. Biophysical analyses revealed that fish cell lines have highly deformable cell membranes with significantly low membrane tensions and Young’s moduli compared with those of mammalian cell lines. The induction of cellular senescence by DNA demethylation using 5-Aza-2ʹ-deoxycytidine significantly reduced the deformability of fish cell membrane, but hydrogen peroxide-induced oxidative stress did not affect the deformability. Mass spectrometry analysis of phospholipids revealed that the level of phosphatidylethanolamine molecules containing polyunsaturated fatty acids significantly increased during the 5-Aza-2ʹ-deoxycytidine-induced cellular senescence. Fish cell lines provide a useful model system for studying the changes in the physicochemical properties of cell membranes during cellular senescence.

Abbreviations: 2D-TLC: two-dimensional thin layer chromatography; 5-Aza-dC: 5-Aza-2ʹ-deoxycytidine; DHA: docosahexaenoic acid; EPA: eicosapentaenoic acid; FBS: fetal bovine serum; PC: phosphatidylcholine; PE: phosphatidylethanolamine; PI: phosphatidylinositol; PS: phosphatidylserine; PUFA: polyunsaturated fatty acid; SA-β-gal: senescence-associated beta-galactosidase; SM: sphingomyelin
Pulsed laser deposition of the ion-conducting LiCoO2 films
Authors: Parshina Liubov , Novodvorsky Oleg , Khramova Olga , Gusev Dmitry , Cherebilo Elena , Arakelian Sergey , Mikhalevsky Vladimir
Published: November 2019

Pulsed laser deposition on the n-type and p-type sapphire and silicon substrates produced the ion-conducting LiCoO2 films with a thickness of 10 to 100 nm. The films were synthesized from the compound LiCoO2:Li2O targets with the concentrations of Li2O 5% and 10% at the substrate temperature of 25 to 500 °C. The optical and electrical properties and surface morphology of the films obtained were investigated depending on the type of the substrate and the deposition temperature. The surface roughness of the LiCoO2 films weakly depended on the type of substrate and increased from 7 to 35 nm with a decrease in the substrate temperature from 500 to 25 °C, respectively. The transmission of the LiCoO2 films increased, on the average, by 30% over the entire spectral range under study from 200 to 1000 nm with a change in the substrate temperature from 25 to 500 °C. It has been established that the LiCoO2 films deposited on the silicon substrates exhibit the resistivity of the order of 10−7 Ω cm for the films prepared on high-conducting n- and p-type silicon, and of the order of 10-1 Ω cm for those prepared on high-resistance silicon of n-type. The LiCoO2 films deposited on the c-sapphire substrates display dielectric properties.
Laser ablation of titanium in the medium of n-hexane by femtosecond laser pulses at various pressures
Authors: Chernikov A S , Kochuev D A , Ivashchenko A V , Khorkov K S , Voznesenskaya A A , Prokoshev V G
Published: November 2019

The paper presents the results of studies on the synthesis of spherical titanium nanopowders in the medium of n-hexane depending on the pressure of the buffer gas. The dependence of the size dispersion of the obtaining nanopowders on pressure is considered. SEM images of the obtained nanopowders are shown. It has been demonstrated that adjusting the value of the external pressure, it is possible to control the size of the ablation products of laser processing.
Evaluation of microstructure and physical and mechanical properties of bulk parts obtained from Russian and German steel powder by selective laser melting
Authors: Usov S. , Tochilin I. , Voznesenskaya A. , Zhdanov A.
Published: November 2019

In this work, a comparative analysis of steel powder materials of Russian and German production is carried out. Samples were obtained by selective laser melting at various melting parameters. X-ray diffraction analysis was carried out, the microstructure of the obtained samples was analyzed by optical microscopy, and hardness of the samples was studied.
The modeling of the light sensitive titanium dioxide microrolls doped by noble metal nanoparticles
Authors: Osipov A. , Kucherik A. , Kutrovskaya S. , Istratov A. , Samyshkin V. , Skryabin I. , Novodvorskiy O. , Arakelian S.
Published: November 2019

Titanium oxide films are photosensitive they have unusual optical properties. This article represents the possibility of the TiO objects (rolls) obtaining with predetermined optical parameters. The article also includes the comparison between numerical and physical experiments.
Different configurations of cores and shear walls in tall buildings
Authors: Paknahad M. , Hejazi F. , Al-Attar Alyaa.A. , Shahbazian A. , Ostovar N.
Published: November 2019

A core system for buildings has been recognized as an effective tool for managing the response of the building when an earthquake happens by decoupling the building structure from potentially damaging earthquake-induced forces. A challenging issue in this context is the application of the configuration of the core system. A review of recent studies shows that the configuration of cores has not been substantial investigated. This study presents seismic design concepts in which different configurations of cores are applied to a building. Nine steel buildings were modeled with rectangular core, octagon core, circle core, lozenge core, cross core, multi core, irregular core 1, and irregular core 2. All structural models are subjected to components of the 1940 El Centro earthquake and are evaluated and compared with the response of a structure without core. All models were also compared with and without opening in cores. The performance of the structural models under seismic excitation was evaluated by conducting linear dynamic time history analysis. Seismic results are investigated in terms of joint displacement and structure internal member forces. Results show that the presence of irregular core 1 significantly reduces the seismic response of the structure in this plane.
A Review of Dynamic Analysis in Frequency Domain for Structural Health Monitoring
Authors: Sarah J. , Hejazi F. , Rashid Raizal S.M. , Ostovar Nima
Published: November 2019

Recently, many different techniques for health monitoring of structure are developed with aim of monitoring the stability of structure with high accuracy and low cost. Nowadays, by advancing technology in the civil engineering field many infrastructures and megastructure are constructed such as towers, dams, bridges and etc. Evaluation of the building stability is complicated in the structure with a complex configuration which led the structural health monitoring process as a challenging issue to ensure the function of the structure during the operation period. To evaluate the serviceability and strength of the building, the subject experts have made a number of attempts to develop damage detection techniques for special building, for example, high-rise building, towers, bridges and dams besides exhibitingeconomical and practical techniques about structural health monitoring systems. In structural assessment procedures, one of the well-known damage detection techniques is referred to as the change of natural frequencies. In addition, many researchers are frequently using the machine learning methods in SHM for identification of damage. Hence, by using these methods, a summary regarding monitoring of special building through frequency domain response of the structure is presented by this study.
Investigation on durability of concrete exposed to chloride, sulfate attack and steel corrosion
Authors: Riyahi A. , Abbas Jebter A. , Hejazi F.
Published: November 2019

In the present age, the concrete material is playing an increasingly important role in construction. But in the meantime, environmental features have serious damaging influence on the concrete. Consequently, this damage will decline the long-time persistence and serviceability of concrete structures. This review paper discusses recent researches activity on the permanence of concrete, including: a) main durability problem including sulfate attack, steel corrosion and alkali aggregate reaction, b) durability of concrete in nautical location such as seawater, groundwater, Salt Lake; and c) mix with effects of environmental items and mechanical loads on persistence of concrete. This report is based on results of many realistic experiments which happened by scientist. Consequently, it’s important to follow these methods to improve service life of concrete and durability would be superior.
Formation of bridge end bumps due to settlement at bridge approaches
Authors: Aziman M. , Raizal Saifulnaz M. R. , Hejazi F. , Azarkerdar Arash
Published: November 2019

The problem of bridge bump has been a major issue for decades. Over the years, a lot of studies have been conducted by various agencies and professionals to investigate and pinpoint the cause of this phenomenon. Majority of researchers agreed that the major cause of the formation of bridge bump is the differential settlement of soil between bridge abutment and bridge approach. However the exact cause of the settlement may vary depending on the site condition. Some of the causes of settlement were discussed in this paper which includes deformation of embankment fill, deformation of foundation soil, poor drainage system in and around the bridge abutment and poor design and construction practices. Besides that, current practices and new development of mitigation and rehabilitation methods were also discussed in this paper. This paper reviews the factors that contribute to the formation of bridge bump while also identifying the available methods that was used to eradicate this problem.
The strength of lightweight aggregate in concrete – A Review
Authors: Banawair A.S. , Qaid G.M. , Adil Z.M. , Nasir N.A.M.
Published: November 2019

Concrete elements are the heaviest weight in structure, and it is the main component of the dead load in structure. Lightweight concrete is used to minimize overall dead load in structures, and also has a remarkable fire resistance quality more than normal weight aggregate concrete. Lightweight concrete can be characterized as a concrete consists of normal and artificial lightweight aggregate such as lightweight expanded clay aggregate (LECA). LECA produced in a rotary kiln which is approximately 50% lighter than normal aggregate, which is a new method in minimizing concrete self-weight. The main purpose of concrete in structure is to resist the compression stresses, the tests need to prove the effectiveness of using LECA in concrete to produce acceptable compression strength. For this reason, many attempts has been made to discuss and review the strength of structural element using LECA. This paper reviews several tests for the strength of LECA concrete by determining the mechanical properties such as flexural strength and compressive strength. The LECA concrete compressive strength is found to be slightly lower than normal weight aggregate concrete. It can be seen from researches results that LECA concrete produced medium strengths, both in compressive and flexural.
Forensic engineering of fire damaged concrete structures – a review–
Authors: Lee W Y , Syed Husin S R , Thangaveloo T , Hejazi F
Published: November 2019

Malaysia has put numerous efforts in producing standards and guidelines for firefighting systems in building. However, with rising statistics of fire incidents in Malaysia, developing the standards and guidelines on forensic engineering for fire damaged concrete structures is a pure challenge. Since the durability of fire damaged concrete depends on many factors including the types of concrete materials used and the thermal actions, a performance-based method should be considerably adopted besides prescriptive method that are currently being used. To overcome this, an attempt has been made to study and review papers on the durability of concrete structures damaged by fire according to the performance-based method, the assessment and its’ rehabilitation. Few methods of assessment and investigation have been discussed briefly in this paper such as non-destructive test like Hammer Test, UPV and Core Test.Various of fire-damaged building rehabilitation method had been implemented in the industry however FRP plates stands out among them. Reviews on the behavior of fire damaged concrete structure repair with FRP composite plate and new improvement in fire resistance of FRP composite materials will be conducted. Other than that, a new composite material, TRM composite for fire damaged concrete strengthening and a chemical treatment method, realkalisation method for restoring fire damaged concrete strength are also discussed. Therefore, the understanding in this field is useful in evaluating and improving the building structural integrity of fire damaged concrete structures to ensure the rectified structure could fulfill the initial function and restore the original mechanical properties.
Waste glass as partial replacement in cement – A review
Authors: Al-jburi Najad A. A. , Hasan Kareem J.K. , Azline Noor , Ostovar Nima
Published: November 2019

The industries of Cement and glass are dealing with a variety of demanding situations due to the excessive factories gases emissions, the extensive use of power and the intensive use of the earth’s natural resources. The temporary landfills of dumping waste glass are now not providing a friendly environment, because of waste glass particle are nonbiodegradable. Furthermore, the chemical structure and the pozzolanic characteristics of waste glass are inspiring for using this waste in the cement industries and urban industries and to provide an environmentally friendly answer for the glass and cement industries. Thus, it can be used as a partial cement replacement in Portland cement concrete or as a partial replacement in the form of waste glass powder (WGP) or as waste glass sludge (WGS). The use of glass powder in Portland cement concrete does have some negative impact on characteristics of the concrete; however, waste glass in its crushed condition can be use in about 100 % and it can still be a practical applicability. This paper reviews the unusual uses of waste glass in cement and concrete and the effect of thermal and pozzolanic activity on the properties of waste glass the impact of the glass characteristics on the durability and performance of the produced cement and concrete.
Influence of Carbon Nanotubes (CNTs) in the Cement Composites
Authors: Ahmed Ba Rahma , Hussein Al-Jaberi , Saleh Dahi , Rashid Raizal S. M.
Published: November 2019

Throughout the construction life, nanoparticles can change and modify the properties and functions of cement-based materials. The traditional cement materials have weak sustainability characteristics insufficient to develop high quality performance structures. Besides that, modifications of compressive and tensile strength and durability durations of cement composites are required. Consequently, a suitable range of Carbon nanotubes (CNTs) concentrations were applied to improve these certain properties. This review presents analysis of the earlier techniques of adding CNTs to cement composites and its influence to mechanical properties and durability. The detailed interactions of CNTs with cement composites, dispersion of CNTs, durability and mechanical performance measurements are addressed from several researches. CNTs addition contributes in adjustment of cement composite microstructures, hence improving the functional components and mechanical properties. If a proper dispersion of CNTs achieved, hydrate products of cement including C-S-H and Ca(OH)2 interact with active CNTs, resulting in decrement of porosity of Portland cement composites which filled up by CNTs proportions leading to increase the mechanical strength. Therefore, this paper present state of the art regarding applications of the additive CNTs in cement composite, the reviewing results of CNTs-cements shows a positive influence on mechanical strength and durability.
Fly ash as supplementry material in concrete : A review
Authors: Lamine Zeggar Mohamed , Azline Noor , Azizi Safiee N.
Published: November 2019

The use of supplementary cementitious materials such as fly ash has seen a steady growth among the recent studies as an economical and effective solution for partial cement replacement. A challenging issue when replacing cement is that the supplementary materials affect concrete properties differently according to various factors such as: the grade of cement, the percentage of replacement, curing periods and environment condition. In order to determine how the concrete compressive strength and its rheological properties can be affected by fly ash, a review on the previous study on concrete fly ash mixtures subjected to various experimentation factors in terms of its main properties has been carried out. The outcomes showed that low calcium fly ash content increases concrete compressive strength of hardened concrete for a period ranging between 28 to 56 days and enhances the concrete rheological properties when the substitution percentage is not too high. Consequently, when fly ash is used as a substitute of cement with a medium quantity, it has an economical and sustainable effect on the cement and concrete industry.
A Review: Application of Building Information Modelling (BIM) over Building Life Cycles
Authors: Firdaus Razali Muhammad , Azam Haron Nuzul , Hassim Salihudin , Hizami Alias Aidi , Nahar Harun Aizul , Salihu Abubakar Abdurrahman
Published: November 2019

Building information modelling (BIM) in the last two decades has been one of the most positive inventions in the fields of architecture, engineering and construction (AEC) industry. The BIM software gives a digital representation of how the building will be after construction. The digital model can be used at preliminary stage for planning and design, at construction stage for construction and at pre-completion stage for the building operation and maintenance. This model, helps the engineers, constructors and architects identify the likely problems that may occur through the generated model of the intended facility in a virtual environment. A total of “108” conference papers, referred journal articles and other academic sources were analysed based on their relevance and research focus. This article gives a review on the implementation of Building information modelling (BIM) over building life cycles with a view of addressing the challenges and future research prospects. The paper concludes by stating that most of the BIM research focuses mainly at the preliminary and construction stages.
The Important of Horizontal Directional Drilling Standard Technical Requirements
Authors: Md. Salleh Mohd Norizam , Azam Haron Nuzul , Zulhaidi Mohd Shafri Helmi , Aziz Abdullah Abdul , Fadzilah Ahmad Nadzrol
Published: November 2019

Horizontal Directional Drilling (HDD) is a trenchless technology provides an installation alternative that offers a lot of benefit compared to traditional open-cut method. It’s called HDD because its steering ability to avoid existing utilities or other obstacles either horizontally, vertically and even pulled back where she got its name. HDD was developed in California in the 1970s and was introduced in Europe in 1986. Since year 1992 up to 2016 there are more than 40 thousand-unit HDD machine were sold worldwide. The aims of this study are to determine the present local authorities’ technical requirements in HDD works, to determine the factors of HDD good practices and to develop a standard HDD’s technical requirement. This research shall use mixed method in achieving the objectives. A descriptive and exploratory research design will be used for the study. The research design for this study contains the following consist of the research problem and research questions, sampling design, method of data collection, method of data analysis, validation/verification of the HDD standard technical requirements and its’ frameworks. This study shall able to produce a standard HDD technical requirement and its’ framework. With the establishment of a thorough and a standard local authority’ technical requirements it’s will able to educate the HDD contractors and assist them in carrying out their work properly, successfully and safely. It’s will also able to educate the stake holders on how important to follow the stipulated technical requirements that contributed to the project success.
Soil structure interaction in framed structure on a hilly area: a case study
Authors: Paknahad M. , Hejazi F. , Jaafar M.S. , Ostovar N.
Published: November 2019

There are many problems in civil engineering which are involving some kind of structural element in straight connection with the land. When there is some forces are applied to the structural element, both component (structural element and soil/ground) must deform and move in compatible manner. These types of problems are referred as Soil-Structure Interaction (SSI) problem. In this project, an analysis of a building on the slope (10˚) with 5 stories was carried out.

The soil under the building are make up by 8 layers consist different type of material. The study in this project is focusing on development of finite element model in order to analysis of a framed structure foundation comprised of a pile system and soil media resting on a hilly area. A beam bending element that calculate the outcome of transverse shear deformation and the axial interaction is then formulated. Based on the interaction behavior of the superstructure foundation soil system, bending moment in the superstructure is found to increase in the external beam and decrease in the inner beams.

The effect of hill slope influences the displacements, and subsequently, the forces in the superstructure. This study also compares the result from SSI program and conventional analysis to find out the weakness of the conventional analysis.