bluuebunny/crossref_metadata_2025 huggingface dataset:
Clinical heterogeneity in random‐effect meta‐analysis: Between‐study boundary estimate problem
Authors: Yoneoka Daisuke , Henmi Masayuki
Published: July 2019

Random‐effect meta‐analysis is commonly applied to estimate overall effects with unexplained heterogeneity across studies. However, standard methods, including (restricted) maximum likelihood (ML or REML), frequently produce (near) zero estimates for between‐study variance parameters. Consequently, these methods are reduced to simple and unrealistic fixed‐effect models, resulting in an ignorance of the substantial clinical heterogeneity and sometimes leading to incorrect conclusions. To solve the boundary estimate problem, we propose (1) an adjusted maximum likelihood method for the between‐study variance that maximizes a likelihood defined as a product of a standard likelihood and a Gaussian class of adjustment factor and (2) a framework using sensitivity analysis by developing a new criterion to check for the occurrence of the boundary estimate. Although the adjustment introduces bias to the overall effects to ensure strictly positive estimates of the between‐study variance when the number of studies K is small, the bias asymptotically approaches zero, resulting in the same estimates derived from the REML method. Moreover, the adjusted maximum likelihood estimator of the between‐study variance is consistent for large K, and interestingly, the REML method and our method are equivalent in terms of mean squared error criterion, up to O(K−1). We illustrate our approach with a motivating example to examine the controversial result of a meta‐analysis for 24 randomized controlled trials of human albumin. Numerical evaluations show that our approach produces no boundary estimates but similar synthesized results with the standard maximum likelihood methods as those produced by conventional methods, especially with a small number of studies.
The Haunting of Shame: Autoethnography and the Multivalent Stigma of Being Queer, Muslim, and Single
Authors: Javaid Aliraza
Published: July 2019

Sociology has neglected the terrain of the gay Muslim single as a sociological phenomenon. Produced and managed via meaningful social conduct, the gay Muslim single often holds negative symbolic and cultural worth, one of lacking identification and presence. The stigma of the gay Muslim single is actively reproduced through social and power relations. I examine multiple stigmas and dichotomies by using autoethnography to illustrate the human lived experience of a gay Muslim single, who is silenced, invisibilized, and embodies a social life of “emptiness.” The gay Muslim single, bringing about a “moral panic,” confronts temporal regulations, norms, and values, notably those of heterosexual ones in everyday social life. He is cast as an “outsider,” which reinforces his stigma in everyday social life.
Application of a SVR model to predict lightning impulse flashover voltages of parallel gaps for insulator strings
Authors: Qiu Zhibin , Wang Xuezong , Ruan Jiangjun
Published: July 2019

Discharge voltage prediction of engineering gap configurations is a great challenge for external insulation design in high‐voltage engineering. This paper presents an air gap discharge voltage prediction model based on the support vector regression (SVR). A series of features are defined on the shortest interelectrode path of an air gap, and they are extracted from the electric field calculation results using the finite element method. These electric field features are considered as the input parameters of the SVR‐based model, and the output is the air gap discharge voltage. The genetic algorithm is used for parameter optimization of the SVR model. Trained by a few experimental data of the Institute of Electrical and Electronics Engineers standard rod–rod gaps, this model is applied to predict the standard lightning impulse flashover voltages of parallel gaps for insulator strings under different gap configurations. The prediction results coincide well with the experimental data collected from previous publications. The mean absolute percentage error of the eight test samples is within 4.07%, which is acceptable for engineering applications. The SVR‐based model may be helpful to guide the structure design and insulation coordination of parallel gaps and insulator strings, thus reducing the required full‐scale tests. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Research on optimal identification method of circuit breaker defect type based on phase space reconstruction and SVM
Authors: Zhao Shutao , Ma Li , Wang Kedeng , Wang Erxu , Xiao Yan
Published: July 2019

The vibration signals generated by the transmission and impact of circuit breaker mechanical components have chaotic characteristics and using conventional signal processing method is difficult to distinguish the abnormal operation process quickly and accurately. Based on the mutual information method and the Cao algorithm, the delay time and the embedding dimension of the phase space reconstruction parameters are calculated and optimized according to the chaotic characteristics of the vibration signals. The singular value order energy (SVOE) and the singular value energy entropy (SVEE) are obtained by decomposing the phase space reconstruction matrix, which is determined by the optimal phase space reconstruction parameters, and the support vector machines (SVM) are used to identify the states of the circuit breaker in operation. The experimental results show that the combination phase space reconstruction and singular value decomposition (PSR‐SVD) can accurately extract the characteristics of the vibration signal of the circuit breaker, and the genetic algorithm (GA)‐improved SVM can quickly and effectively identify the circuit breaker defect types, which solves the problems of path distortions, energy leaks, modal aliasing, and lack of samples in existing diagnostic methods. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Two Novel Lanthanide Metal‐Organic Frameworks Constructed by Tetracarboxylate Ligands: Synthesis, Structures; and Luminescent Properties
Authors: Liu Fu‐Hong , Hu Xiao‐Li , Li Xiao , Su Zhong‐Min
Published: July 2019

Two new isostructural lanthanide metal‐organic frameworks were synthesized using lanthanide oxides and 3,3,4,4‐benzophenonetetracarboxylic acid (H4BPTC), namely, [Ln(BPTC)(H2O)2.5] [Ln = Eu (1), Gd (2)] under hydrothermal conditions. 1 and 2 revealed porous three‐dimensional structures, possessing a binodal 4, 8‐connected flu network defined by dinuclear building units. 1 and 2 were characterized by powder X‐ray diffraction (PXRD), thermogravimetric analysis (TG), infrared radiation (IR), and photoluminescence (PL) spectra. Furthermore, 1 exhibits red‐light emission under UV light irradiation and the sharp light can be easily observed by naked eyes.
De Sitter horizons & holographic liquids
Authors: Anninos Dionysios , Galante Damián A. , Hofman Diego M.
Published: July 2019

Abstract

We explore asymptotically AdS2 solutions of a particular two-dimensional dilaton-gravity theory. In the deep interior, these solutions flow to the cosmological horizon of dS2. We calculate various matter perturbations at the linearised and non-linear level. We consider both Euclidean and Lorentzian perturbations. The results can be used to characterise the features of a putative dual quantum mechanics. The chaotic nature of the de Sitter horizon is assessed through the soft mode action at the AdS2 boundary, as well as the behaviour of shockwave type solutions.
Transition out of Marriage and its Effects on Health and Health–Related Quality of Life among Females and Males. COURAGE and COURAGE-POLFUS–Population Based Follow-Up Study in Poland
Authors: Wójcik Grzegorz , Zawisza Katarzyna , Jabłońska Katarzyna , Grodzicki Tomasz , Tobiasz-Adamczyk Beata
Published: July 2019

The study explores short-term effects of dissolution of union through divorce/separation and widowhood on physical and mental health as well as health-related quality of life (HRQoL) among females and males in Poland. Considering social selection and social causation theories, the study poses following research questions: are there differences in physical and mental health as well as health-related quality of life that are caused by a marital transition compared to remaining married/cohabiting? Do marital status transitions have different effects concerning physical and mental health and health-related quality of life among females and males? Data for the analysis were available for 1073 people (18+) who participate in the COURAGE-Poland population-based study from 2011 (baseline) and 2015–2016 COURAGE-POLFUS (follow-up). Health status was measured by the WHODAS II and the presence of depression based on the Composite International Diagnostic Interview. Health-related quality of life was assessed by WHOQOL-AGE scale. The analysis has been conducted using the analysis of variance, multinomial logistic regression and generalized liner mixed model according to the dependent variable. Results do suggest that transition out of marriage weakens mental health although the differences in physical health seemed to not be significant compared to the continuously married/cohabiting. The marital dissolution especially causes a decline in the mental health as well as health-related quality of life of males who transitioned to a widowed life. There has not been observed statistically significant change in terms of healthrelated quality of life between first and second wave of the survey among both widowed and divorced males and females.
Lumpectomy Specimen Radiography: Does Orientation or 3-Dimensional Tomosynthesis Improve Margin Assessment?
Authors: Mario Julia , Venkataraman Shambhavi , Fein-Zachary Valerie , Knox Mark , Brook Alexander , Slanetz Priscilla
Published: July 2019

Purpose

Our purpose was twofold. First, we sought to determine whether 2 orthogonal oriented views of excised breast cancer specimens could improve surgical margin assessment compared to a single unoriented view. Second, we sought to determine whether 3D tomosynthesis could improve surgical margin assessment compared to 2D mammography alone.

Materials and Methods

Forty-one consecutive specimens were prospectively imaged using 4 protocols: single view unoriented 2D image acquired on a specimen unit (1VSU), 2 orthogonal oriented 2D images acquired on the specimen unit (2VSU), 2 orthogonal oriented 2D images acquired on a mammogram unit (2V2DMU), and 2 orthogonal oriented 3D images acquired on the mammogram unit (2V3DMU). Three breast imagers randomly assessed surgical margin of the 41 specimens with each protocol. Surgical margin per histopathology was considered the gold standard.

Results

The average area under the curve (AUC) was 0.60 for 1VSU, 0.66 for 2VSU, 0.68 for 2V2DMU, and 0.60 for 2V3DMU. Comparing AUCs for 2VSU vs 1VSU by reader showed improved diagnostic accuracy using 2VSU; however, this difference was only statistically significant for reader 3 (0.73 vs 0.63, P = .0455). Comparing AUCs for 2V3DMU vs 2V2DMU by reader showed mixed results, with reader 1 demonstrating increased accuracy (0.72 vs 0.68, P = .5984), while readers 2 and 3 demonstrated decreased accuracy (0.50 vs 0.62, P = .1089 and 0.58 vs 0.75, P = .0269).

Conclusions

2VSU showed improved accuracy in surgical margin prediction compared to 1VSU, although this was not statistically significant for all readers. 3D tomosynthesis did not improve surgical margin assessment.
Persistence of right ventricular dysfunction and altered morphometry in asymptomatic preterm Infants through one year of age: Cardiac phenotype of prematurity
Authors: Erickson Collin T. , Patel Meghna D. , Choudhry Swati , Bisselou Karl Stessy , Sekarski Tim , Craft Mary , Li Ling , Khuffash Afif El , Hamvas Aaron , Kutty Shelby , Singh Gautam K. , Levy Philip T.
Published: July 2019

Introduction:

Prematurity impacts myocardial development and may determine long-term outcomes. The objective of this study was to test the hypothesis that preterm neonates develop right ventricle dysfunction and adaptive remodelling by 32 weeks post-menstrual age that persists through 1 year corrected age.

Materials and Methods:

A subset of 80 preterm infants (born <29 weeks) was selected retrospectively from a prospectively enrolled cohort and measures of right ventricle systolic function and morphology by two-dimensional echocardiography were assessed at 32 weeks post-menstrual age and at 1 year of corrected age. Comparisons were made to 50 term infants at 1 month and 1 year of age. Sub-analyses were performed in preterm-born infants with bronchopulmonary dysplasia and/or pulmonary hypertension.

Result:

In both term and preterm infants, right ventricle function and morphology increased over the first year (p < 0.01). The magnitudes of right ventricle function measures were lower in preterm-born infants at each time period (p < 0.01 for all) and right ventricle morphology indices were wider in all preterm infants by 1 year corrected age, irrespective of lung disease. Measures of a) right ventricle function were further decreased and b) morphology increased through 1 year in preterm infants with bronchopulmonary dysplasia and/or pulmonary hypertension (p < 0.01).

Conclusion:

Preterm infants exhibit abnormal right ventricle performance with remodelling at 32 weeks post-menstrual age that persists through 1 year corrected age, suggesting a less developed intrinsic myocardial function response following preterm birth. The development of bronchopulmonary dysplasia and pulmonary hypertension leave a further negative impact on right ventricle mechanics over the first year of age.
Fully reconfigurable hexagonal-shaped comb-line filterplatform for prototyping and education purposes
Authors: Miek Daniel , Höft Michael
Published: July 2019

In this paper, a completely reconfigurable comb-line bandpass filter is presented. Due to the modularity, different standard coupling matrix topologies like the folded form, cascaded triplets, and the cul-de-sac form can be implemented and tested. Circuit-based coupling matrices like the extracted pole topology can easily be realized as well. Different types of input-/output- and cross-couplings can be examined before fabrication of a fixed filter set-up takes place. Furthermore, the proposed filter platform can be used to construct a diplexer. By using different heights of the inner and outer conductor of the coaxial resonators, arbitrary center frequencies in the range between 1 and 4 GHz can be realized. Various types of input couplings are available and proposed here to achieve bandwidths between 10 and 110 MHz. A variety of cross-coupling apertures able to realize transmission zeros are presented as well.
Crustal Structure Beneath the Wabash Valley Seismic Zone From the Joint Inversion of Receiver Functions and Surface‐Wave Dispersion: Implications for Continental Rifts and Intraplate Seismicity
Authors: Aziz Zanjani Asiye , Zhu Lupei , Herrmann Robert B. , Liu Yuchen , Gu Zhiyuan , Conder James A.
Published: July 2019

Seismicity of several intraplate seismic zones in the North American midcontinent is believed to be related to reactivation of ancient faults in Precambrian continental rifts by the contemporary stress field. Existence of such a rift system beneath the Wabash Valley Seismic Zone (WVSZ) is not clear. Here we obtained a crustal structural image along a 300‐km‐long profile across WVSZ using a dense linear seismic array. We first calculated teleseismic receiver functions of stations and applied the Common‐Conversion‐Point stacking method to image crustal interfaces and the Moho. We then used ambient noise cross correlation to obtain phase and group velocities of Rayleigh and Love waves. Finally, we jointly inverted the receiver function and surface wave dispersion data to determine shear wave velocity structure along the profile. The results show a thick (50‐ to 60‐km) crust with a typical Proterozoic crustal layering: a 1‐ to 2‐km thick Phanerozoic sedimentary layer, an upper crust ∼15 km thick, and a 30‐ to 40‐km‐thick lower crust. The unprecedented high‐resolution image also reveals a 50‐km‐wide high‐velocity body above an uplifted Moho and several velocity anomalies in the upper and middle crust beneath the La Salle Deformation Belt. We interpreted them as features produced by magmatic intrusions in a failed, immature continental rift during the end of Precambrian. Current seismicity in WVSZ is likely due to reactivation of ancient faults of the rift system by a combination of stress fields from the far‐field plate motion and prominent crustal and upper mantle heterogeneities in the region.
Atmospheric Processing of Loess Particles in a Polluted Urban Area of Northwestern China
Authors: Chen Yang , Liu Huanwu , Huang Ru‐Jin , Yang Fumo , Tian Mi , Yao Xiaojiang , Shen Zhenxing , Yan Lulu , Cao Junji
Published: July 2019

Loess is an important dust component of airborne particles in Northwestern China. Knowledge of the chemical composition, mixing state, and processing of loess particles in urban plumes is still limited. Urban loess particles were characterized using a single‐particle aerosol mass spectrometer. To understand sources and processing of loess particles, source samples from the road, urban background, soil, construction, and biomass burning ash were collected in the urban areas and characterized. Loess particles were determined as a kind of calcium‐silicate‐rich ones, which were internally mixed with calcium, silicates, potassium, elemental carbon, organics, ammonium, sulfate, and nitrate. Road and soil were major sources of loess particles. Among the aged loess particles, the average peak areas of taken‐up nitrate and sulfate were comparable to that of (Fe+Ca+Al). Diurnal uptake profiles of chloride, sulfate, oxalate, and nitrate on loess particles were analyzed. The nocturnal elevation of chloride occurred significantly due to the uptake of HCl (g). Nighttime nitrate formation occurred prevalently under high relative humidity conditions via the heterogeneous hydrolysis of N2O5. The nighttime enrichment of oxalate, which is a marker for aqueous‐formatted secondary organic aerosol, was also found. Besides the nighttime chemistry, the daytime photochemical activities were also a drive for the elevations of sulfate, nitrate, and ammonium. Conclusively, the processing of loess particles in polluted urban plumes significantly altered their chemical composition and mixing state.
Active Layer Groundwater Flow: The Interrelated Effects of Stratigraphy, Thaw, and Topography
Authors: O'Connor Michael T. , Cardenas M. Bayani , Neilson Bethany T. , Nicholaides Kindra D. , Kling George W.
Published: July 2019

The external drivers and internal controls of groundwater flow in the thawed “active layer” above permafrost are poorly constrained because they are dynamic and spatially variable. Understanding these controls is critical because groundwater can supply solutes such as dissolved organic matter to surface water bodies. We calculated steady‐state three‐dimensional suprapermafrost groundwater flow through the active layer using measurements of aquifer geometry, saturated thickness, and hydraulic properties collected from two major landscape types over time within a first‐order Arctic watershed. The depth position and thickness of the saturated zone is the dominant control of groundwater flow variability between sites and during different times of year. The effect of water table depth on groundwater flow dwarfs the effect of thaw depth. In landscapes with low land‐surface slopes (2–4%), a combination of higher water tables and thicker, permeable peat deposits cause relatively constant groundwater flows between the early and late thawed seasons. Landscapes with larger land‐surface slopes (4–10%) have both deeper water tables and thinner peat deposits; here the commonly observed permeability decrease with depth is more pronounced than in flatter areas, and groundwater flows decrease significantly between early and late summer as the water table drops. Groundwater flows are also affected by microtopographic features that retain groundwater that could otherwise be released as the active layer deepens. The dominant sources of groundwater, and thus dissolved organic matter, are likely wet, flatter regions with thick organic layers. This finding informs fluid flow and solute transport dynamics for the present and future Arctic.
Integrating Typhoon Destructive Potential and Social‐Ecological Systems Toward Resilient Coastal Communities
Authors: Sajjad Muhammad , Li Yi , Li Yangfan , Chan Johnny C. L. , Khalid Shoaib
Published: July 2019

The resilience of coastal communities becomes a critical issue of the social‐ecological system adapting to impacts from hazards on coastal well‐being. This paper formulates a framework integrating typhoon destructive potential and social‐ecological system from a perspective of coastal resilience. Typhoon destructive potential is interpreted using the Power Dissipation Index as a metric. We use the distributional models in geographic information systems to identify the spatial hotspots of high Power Dissipation Index along the coast of Mainland China. Furthermore, we evaluate the community resilience in all identified hotspots with place‐based indicators within five potential dimensions (Social, Ecological, Institutional, Economic, and Safety). Though the results show no significant long‐term trends in the typhoon destructive potential, statistically significant interdecadal variations are identified in different hotspots during 1949–2014. The resilience assessment results reveal that ecological (predisaster defense) and safety resilience (postdisaster support) are critical issues in achieving coastal community resilience. We argue that improving the ecological stewardship (having great predisaster defense) and adopting integrated approaches contribute to resilience enhancement, providing opportunities to support all the dimensions of community resilience via improving the social‐economic‐ecological nexus. The integration of typhoon destructive potential and social‐ecological system helps to achieve Sustainable Development Goal 13 through risk‐informed decision‐making. The results from this study have important policy implications for local‐scale planning incorporating place‐based indicators.
Constraining Downward Terrestrial Gamma Ray Flashes Using Ground‐Based Particle Detector Arrays
Authors: Berge N. , Celestin S.
Published: July 2019

Until recently, there were only a few ground‐based observations of terrestrial gamma ray flashes (TGFs). Since the Telescope Array in Utah, USA, started reporting detections of high‐energy particles correlated with lightning, their number has greatly increased. Ground observations of TGFs represent a valuable addition to space‐borne detectors. The proximity to the event and the ability to observe an event with several detectors may reveal new information about the production of TGFs. In this paper, we study downward directed TGFs using Monte Carlo modeling of photon transport through the atmosphere. The Telescope Array‐observed pulses of gamma rays spread over periods of a few hundred microseconds. We predict such structures to be observable at satellite altitude, given sufficient time resolution. Additionally, we demonstrate how various source spectra would lead to different number of photons reaching ground, which impacts the conclusions one can draw using observational data.
Patterns of protist diversity associated with raw sewage in New York City
Authors: Maritz Julia M , Ten Eyck Theresa A , Elizabeth Alter S , Carlton Jane M
Published: July 2019

Protists are ubiquitous components of terrestrial and aquatic environments, as well as animal and human microbiomes. Despite this, little is known about protists in urban environments. The ~7400-mile sewer system of New York City (NYC) collects human waste from ~8 million human inhabitants as well as from animals, street runoff, and groundwater, providing an ideal system to study these microbes. We used 18S rRNA amplicon sequencing and shotgun metagenomic sequencing to profile raw sewage microbial communities. Raw sewage samples were collected over a 12-month period from 14 treatment plants of the five NYC boroughs, and compared with samples from other environments including soil, stormwater, and sediment. Sewage contained a diverse protist community dominated by free-living clades, and communities were highly differentiated across environments. Seasonal differences in protist composition were observed; however, network analysis and functional profiling demonstrated that sewage communities were robust and functionally consistent. Protists typically associated with human and animal guts or feces were frequently detected. Abundance of these parasites varied significantly both spatially and temporally, suggesting that spikes could reflect trends in the source population. This underscores sewage as a valuable model system for monitoring patterns in urban microbes and provides a baseline protist metagenome of NYC.
Anoxygenic photosynthesis and the delayed oxygenation of Earth’s atmosphere
Authors: Ozaki Kazumi , Thompson Katharine J. , Simister Rachel L. , Crowe Sean A. , Reinhard Christopher T.
Published: July 2019

The emergence of oxygenic photosynthesis created a new niche with dramatic potential to transform energy flow through Earth’s biosphere. However, more primitive forms of photosynthesis that fix CO2 into biomass using electrons from reduced species like Fe(II) and H2 instead of water would have competed with Earth’s early oxygenic biosphere for essential nutrients. Here, we combine experimental microbiology, genomic analyses, and Earth system modeling to demonstrate that competition for light and nutrients in the surface ocean between oxygenic phototrophs and Fe(II)-oxidizing, anoxygenic photosynthesizers (photoferrotrophs) translates into diminished global photosynthetic O2 release when the ocean interior is Fe(II)-rich. These results provide a simple ecophysiological mechanism for inhibiting atmospheric oxygenation during Earth’s early history. We also find a novel positive feedback within the coupled C-P-O-Fe cycles that can lead to runaway planetary oxygenation as rising atmospheric pO2 sweeps the deep ocean of the ferrous iron substrate for photoferrotrophy.
Identification of a pro-angiogenic functional role for FSP1-positive fibroblast subtype in wound healing
Authors: Saraswati Sarika , Marrow Stephanie M. W. , Watch Lester A. , Young Pampee P.
Published: July 2019

Fibrosis accompanying wound healing can drive the failure of many different organs. Activated fibroblasts are the principal determinants of post-injury pathological fibrosis along with physiological repair, making them a difficult therapeutic target. Although activated fibroblasts are phenotypically heterogeneous, they are not recognized as distinct functional entities. Using mice that express GFP under the FSP1 or αSMA promoter, we characterized two non-overlapping fibroblast subtypes from mouse hearts after myocardial infarction. Here, we report the identification of FSP1-GFP+ cells as a non-pericyte, non-hematopoietic fibroblast subpopulation with a predominant pro-angiogenic role, characterized by in vitro phenotypic/cellular/ultrastructural studies and in vivo granulation tissue formation assays combined with transcriptomics and proteomics. This work identifies a fibroblast subtype that is functionally distinct from the pro-fibrotic αSMA-expressing myofibroblast subtype. Our study has the potential to shift our focus towards viewing fibroblasts as molecularly and functionally heterogeneous and provides a paradigm to approach treatment for organ fibrosis.
Intelligent whole-blood imaging flow cytometry for simple, rapid, and cost-effective drug-susceptibility testing of leukemia
Authors: Kobayashi Hirofumi , Lei Cheng , Wu Yi , Huang Chun-Jung , Yasumoto Atsushi , Jona Masahiro , Li Wenxuan , Wu Yunzhao , Yalikun Yaxiaer , Jiang Yiyue , Guo Baoshan , Sun Chia-Wei , Tanaka Yo , Yamada Makoto , Yatomi Yutaka , Goda Keisuke
Published: July 2019

The drug susceptibility of leukemia cells in whole blood is evaluated by using extreme-throughput imaging flow cytometry with deep learning.
Continuous separation of fungal spores in a microfluidic flow focusing device
Authors: Park Byeong Seon , Kye Hyeon Gi , Kim Tae Hyeon , Lee Jong Min , Ahrberg Christian D. , Cho Eun-Min , Yang Sung Ik , Chung Bong Geun
Published: July 2019

The research of fungi is of great importance in a number of fields, such as environmental and healthcare studies.
Resistive switching behaviors and memory logic functions in single MnOx nanorod modulated by moisture
Authors: Zhou Guangdong , Sun Bai , Ren Zhijun , Wang Lidan , Xu Cunyun , Wu Bo , Li Ping , Yao Yanqing , Duan Shukai
Published: July 2019

Reversion between resistor and memristor and memory logic functions induced by moisture.
An imido ligand significantly enhances the effective energy barrier of dysprosium(iii) single-molecule magnets
Authors: Liu Bing-Cheng , Ge Ning , Zhai Yuan-Qi , Zhang Tao , Ding You-Song , Zheng Yan-Zhen
Published: July 2019

A very basic imido ligand that can strongly bind to the dysprosium(iii) ion and significantly enhance the effective energy barrier for magnetisation reversal is reported.
Doping of aluminum (Al) into copper sulfide (CuS) nanocrystals enhanced their solar spectral selectivity
Authors: Jing Jiang , Gu Xiaoyu , Zhang Sheng , Sun Jun , Chen Yu , Sun Tongbing
Published: July 2019

Al-CuS/PVA film possessed low NIR transmittance and high visible light transmittance. CuS nanocrystals doping Al significantly enhance their solar spectral selectivity.
Mixed lead carboxylates relevant to soap formation in oil and tempera paintings: the study of the crystal structure by complementary XRPD and ssNMR
Authors: Kočí Eva , Rohlíček Jan , Kobera Libor , Plocek Jiří , Švarcová Silvie , Bezdička Petr
Published: July 2019

The crystal structure of mixed lead carboxylates consisting of both palmitate and stearate anions was revealed by complementary XRPD and ssNMR.
Abrupt spin crossover in iron(iii) complexes with aromatic anions
Authors: Lazaro Sharon E. , Alkaş Adil , Lee Seok J. , Telfer Shane G. , Murray Keith S. , Phonsri Wasinee , Harding Phimphaka , Harding David J.
Published: July 2019

Two iron(iii) complexes, [Fe(qsal-X)2]OTs·nH2O, are found to exhibit abrupt spin crossover with the spin transition temperature substituent dependent, and X⋯O halogen bonds linking the spin centres.
Bis(diphenylphosphinyl)-functionalized dipyrido-annulated NHC towards copper(i) and silver(i)
Authors: Zhang Sihan , Shang Rong , Nakamoto Masaaki , Yamamoto Yohsuke , Adachi Yohei , Ohshita Joji
Published: July 2019

Sterically rigid bis(phosphinyl)dipyrido-annulated NHC coordinates with Ag(i) and Cu(i) centres to form luminescent multinuclear complexes.
Theoretical investigation of the chiral transition of serine and the roles of water, hydroxyl radical and hydroxide ion
Authors: Tong Hua , Liu Yan Fang , Yan Hongyan , Jiang Chunxu , Gao Feng , Mei Zemin , Hong Kun , Yang Xiaocui , Wang Zuocheng
Published: July 2019

The serine chiral transition and the roles of water, hydroxyl radical and hydroxide ion as catalysts were theoretically investigated.
Side chain engineering in DTBDT-based small molecules for efficient organic photovoltaics
Authors: Hong Jisu , Choi Ji Young , Kim Kyunghun , Lee Nam-Suk , Li Jiqiang , Park Chan Eon , An Tae Kyu , Kim Yun-Hi , Kwon Soon-Ki
Published: July 2019

A new small-molecule donor with a DTBDT core exhibits apposite blend morphologies and a maximum PCE of 9.18% by side chain engineering and solvent vapor annealing.
Ambient synthesis of nanomaterials by in situ heterogeneous metal/ligand reactions
Authors: Chang Boyce S. , Thomas Brijith , Chen Jiahao , Tevis Ian D. , Karanja Paul , Çınar Simge , Venkatesh Amrit , Rossini Aaron J. , Thuo Martin M.
Published: July 2019

Coordination polymers are ideal synthons for high aspect ratio nanomaterials. Using conjugate acid-base pairs, liquid metals are etched and chelated in situ. Solubility-driven polymerization, precipitation, and self-assembly gives tunable structures.
A novel chemiluminescent probe for hydrazine detection in water and HeLa cells
Authors: Liu Jiang , Jiang Jianze , Dou Yandong , Zhang Fangfang , Liu Xin , Qu Jiaojiao , Zhu Qing
Published: July 2019

A novel chemiluminescent probe based on intramolecular cyclization for hydrazine detection in living cells.
Chiral helical substituted polyacetylene grafted on hollow polymer particles: preparation and enantioselective adsorption towards cinchona alkaloids
Authors: Yong Xueyong , Wu Youping , Deng Jianping
Published: July 2019

Hollow polymer particles tethering chiral helical polymer chains and functional carboxyl groups were prepared and applied in enantioselective adsorption.
Taming conformational heterogeneity in and with vibrational circular dichroism spectroscopy
Authors: Koenis Mark A. J. , Xia Yiyin , Domingos Sérgio R. , Visscher Lucas , Buma Wybren Jan , Nicu Valentin P.
Published: July 2019

Genetic fitting algorithm accounting for the uncertainty in computed energies allows a significantly more reliable assignment of stereochemistry and conformational heterogeneity of chiral compounds using vibrational circular dichroism.
TNFAIP8L1 and FLT1 polymorphisms alter the susceptibility to cervical cancer amongst uyghur females in China
Authors: Han Lili , Husaiyin Sulaiya , Ma Chunhua , Wang Lin , Niyazi Mayinuer
Published: July 2019

TNFAIP8L1 and FLT1 play critical roles in the occurrence and development of tumors, but no in-depth studies have been carried out in cervical cancer. The present study aims to research the correlation between polymorphisms of these two genes and the risk of cervical cancer in the Uygur women. The study involved 342 cervical cancer patients and 498 healthy women. Five single nucleotide polymorphisms (SNPs) from the TNFAIP8L1 gene and the FLT1 gene were selected and genotyped. Odds ratio and 95% CIs were calculated by logistic regression analysis to evaluate the correlation between SNPs and cervical cancer risk. The alleles rs9917028-A (P=0.032), rs10426502-A (P=0.007), and rs1060555-G (P=0.026) of TNFAIP8L1 were associated with a decreased risk of cervical cancer. In the multiple genetic models, these three SNPs were also associated with the risk of cervical cancer. The stratified analysis showed that TNFAIP8L1-rs10426502, -rs1060555, and FLT1-rs9513111 were associated with a decreased risk of cervical cancer amongst people older than 43 years. Moreover, the haplotypes AG (P=0.007) and GC (P=0.026) of linkage disequilibrium block rs10426502|rs1060555 in TNFAIP8L1 were significantly associated with an increased risk of cervical cancer. Our results suggested that the relationships between TNFAIP8L1 and FLT1 polymorphisms and the risk of cervical cancer amongst Uyghur females.
Engineering solventogenic clostridia for commercial production of bio‐chemicals
Authors: Fairhurst Nathan W. G. , Harper Rachel A. , Smith Holly K. , Speight Lee C. , Clements Joseph S. , Jenkinson Elizabeth R.
Published: July 2019

The manufacture of bio‐chemicals through the use of microbial fermentation and renewable feedstock has a number of well‐known advantages linked to sustainability and reduced impacts on the environment. Markets for molecules produced with greener credentials are growing as consumers become more aware of what is in the formulated products they use every day. The use of solventogenic clostridia has now been re‐commercialised for the production of bio‐acetone and bio‐n‐butanol. The different impurity profiles of these bio‐based molecules compared with petro‐versions results in performance advantages in downstream derivatisation chemistry, giving an added benefit alongside sustainability advantages. Advances in genome editing now enable us to take the benefits observed with clostridial fermentation and apply them to the production of the next generation of bio‐molecules.
Robust and adaptive ROI extraction for hyperspectral dorsal hand vein images
Authors: Nie Wei , Zhang Bob
Published: July 2019

Hyperspectral dorsal hand vein image analysis for biometrics is a relatively new technology with great potential. Compared to traditional dorsal hand biometrics that use only one spectral band to capture and analyse the veins, hyperspectral imaging allows additional information to be included. Given the difficulties of processing hyperspectral dorsal hand images, including uneven illuminations, a noisy background, translation, and deformation, this study proposes a robust and adaptive region of interest (ROI) extraction algorithm. First, a novel knuckle pinky invariant point is located. Next, based on this invariant point a key line on the dorsal hand representing one side of the squared ROI is found. The remaining three sides of the ROI can then be formed. To evaluate the proposed method, both identification and verification experiments were conducted on a large hyperspectral dorsal hand vein database. The experimental results showed that the proposed method outperformed other dorsal hand ROI extraction algorithms for each hyperspectral band. Having performed well in both experiments, the groundwork has been laid to further analyse the extracted ROI in terms of feature extraction.
Modified tensor method to power flow analysis
Authors: dos Santos Erika Pequeno , Kobay Bruna , da Rosa Mauro Augusto , de Souza Salgado Roberto , Issicaba Diego
Published: July 2019

This study introduces a modified tensor‐based power flow method designed using complex voltages represented in their rectangular form. Tensor‐based methods employ the second‐order Taylor series expansion of the power flow equations to estimate a correction vector to be added to the iterative increments of the Newton–Raphson method. In the proposed approach, the estimation of the correction vector is improved by taking advantage of a relation between the Jacobian and tensor arrays and symmetries between matrix–vector products involving Jacobian matrices. Result analysis highlights the efficiency and robustness of the proposed method in comparison with the original tensor‐based approach using test systems and an actual system.
Assessment of economic benefits of battery energy storage application for the PV‐equipped households in Finland
Authors: Kuleshov Dmitrii , Peltoniemi Pasi , Kosonen Antti , Nuutinen Pasi , Huoman Kimmo , Lana Andrey , Paakkonen Mikko , Malinen Esa
Published: July 2019

Significant growth in residential solar photovoltaic (PV) installations and the ongoing decline in battery costs have increased interest in household solar battery energy storage projects in Finland in recent years. Among various potential applications, considerable attention is drawn to the use of the battery energy storage system (BESS) for the purpose of the households’ self‐consumption enhancement. This study presents the results of a techno‐economic study of the LiFePO4 ‐based battery storage added to residential roof‐top PV installations in Finland to maximise self‐utilisation of on‐site solar energy generation. Using a comprehensive DC model of BESS, the battery charge and discharge levels under the typical household load and PV production conditions are simulated. The estimates of the average retail electricity prices are used to assess the value that the customer‐sited solar battery storage can provide to the household end‐users in Finland. The economic attractiveness of the battery storage projects is evaluated considering the present and forecasted BESS costs and the electricity tariff levels in Finland and the conditions for profitable operation of the solar energy storage systems are determined.
Computing second‐order scattering of obtuse dihedral for any incident angle
Authors: Song Haibo , Wen Gongjian
Published: July 2019

In this study, the second‐order scattering area and field of obtuse dihedral is derived in detail. The obtuse angle, interior angle of dihedral, breaks the symmetry of the two plates in some extent, thus making the illumination case of double bounce more complex. To overcome that, the two plates are analysed here, respectively. Besides, the all cases of second‐order scattering area are considered. Firstly, geometrical optics is utilised to analyse the illuminated cases for each plate and the corresponding range of the incident angle is listed. Then, according to the physical optics integral formula, the integral terms of both plates are derived. To validate the derived model, the experiments compared with shooting and bouncing rays under different illuminated cases have been done.
Legal aspects of protection of intellectual property objects in mining engineering
Authors: Bulat Ievgeniia
Published: July 2019

The innovative model of development of Ukraine requires implementation of measures aimed at stimulation and protection of intellectual property objects and development of such improved legislative basis in this sphere that would allow not only to preserve existing scientific potential but also to ensure proper protection of the rights of creators of such objects with possibility of their further commercialization. The necessity and expediency of introducing this legal protection improvement is shown on the example of such objects as scientific discoveries in mining engineering, business methods and innovative proposals. The article is devoted to the improvement of mechanism for legal protection of intellectual property rights to the intellectual activity results in context of integration processes that take place in Ukraine. A unified approach is proposed, which assumes revealing in practical part of each claimed object its protectable part, followed by procedure of patenting in accordance with the procedure stipulated by the current legislation.
Vibroseismic protection of heavy mining machines, buildings and structures
Authors: Dyrda Vitalii , Kobets Anatolii , Bulat Ievgeniia , Lapin Vladimir , Lysytsia Natalia , Ahaltsov Hennadii , Sokol Serhii
Published: July 2019

In the article, the authors analyze main issues of protecting buildings and structures against vibroseismic effects with the help of system of elastomeric blocks, which are characterized by high vertical stiffness, low shear stiffness, high energy dissipation and ability to center vertical load; besides, they feature high reliability with no risk of sudden failure. Results of static and dynamic tests of parametric series of elastomeric blocks used for protection of residential buildings against vibrations are presented. Design of pile with anti-vibration rubber supports is described. Calculation of elastomeric blocks under static compression is presented. Components of the stress-strain state of the thin-layer elements were investigated, and rate of the thin rubber layer compression under the action of vertically applied force was calculated. In numerical calculation, weak compressibility of rubber was simulated by moment force of the finite element for weakly compressible materials, which assumes triple approximation of displacement fields, deformation components, and volume change function. The numerical solution was obtained by the finite element method for different radius-thickness ratios in case of geometrically nonlinear elastic and viscoelastic deformation.
Gold sorption from cyanide media by ANS-3 anionite
Authors: Korovin Vadym , Pohorielov Yurii , Shestak Yurii , Zontov Oleksandr , Zontova Larysa
Published: July 2019

Research results were presented for gold sorption from cyanide solutions by ANS-3 macroporous anionite based on styrene-divinyl benzene copolymer. Equilibrium data on gold sorption from a model cyanide solution agreed with the modified Langmuir-Freundlich equation within the studied gold concentrations. Gold stripping results with alkaline cyanide solution were given. Optimal structure of polymer matrix provides high mechanical and osmotic strength of ANS-3 anionite. The anionite is not subjected to an osmotic shock in alkaline solution allowing its application in hydrometallurgical processes including sorption from pulps.
Substantiation of the parameters of the tailings storage core during the storing of the cleaning rejects by hydraulic method
Authors: Medvedieva Olha , Kyrychko Serhii , Nykyforova Nina , Koval Nataliia
Published: July 2019

The paper analyzes the current state of artificial tailings storages. These unique anthropogenic facilities may be considered both as the sources of environmental hazard and as promising anthropogenic deposits. The relevance of their development is shown. Taking into account the existing technologies of tailings storing, it is substantiated that the future anthropogenic deposit is formed by hydraulicking layers of the same thickness, displaced relative to each other in the horizontal plane by the same amount. As a result of research dependences were obtained that allow estimation of the probable volumes of stored mineral processing products and available storage volume when building up dams, as well as justification of the location of the inner boundary between the core of the artificial storage and the body of the retaining prism.
Defining the effect of the chemical concentration and solution pH on membrane chemical cleaning process
Authors: Nechytailo Mykola , Nahorna Olena , Kosiuk Yevhenii
Published: July 2019

In the process of treating natural water from surface sources, precipitated substances are tend to be deposited on the ultrafiltration membrane, either as suspended solids or as gel structures, formed by humic substances with metal salts. Hydraulic washes are unable to remove gelled structures from the surface of the membranes. Consequently, the phenomenon of gelation on the surface of the membrane causes gradual decrease in productivity, which is a negative factor. Chemical washing of membranes is generally used to remove the gel layer from the membrane surface. In this paper, the range of compositions which effectively remove complex contaminants is proposed, and also the efficacy of both pH and changes in the concentration of active substances on the process of washing the membrane are analyzed.
On the informativeness of the shock pulse method for controlling the geocomposite constructions strength
Authors: Prokhorets Liliia
Published: July 2019

This article shows the possibility of using the shock impulse method widely used in the building industry for the control of above-ground concrete structures in relation to elements of underground geocomposite protective constructions. As a result of experimental studies performed in the laboratory on various mortar mixtures that harden, it was established that there is a close correlation relationship between two data arrays: the values of the shock pulse duration and the uniaxial compression strength. The reliability of the obtained regression equations is in the range of 0.82 - 0.9. This shows the possibility of using the shock pulse method in the new version, with the previously unused informative parameter - the shock pulse duration for assessing the strength of mortar mixes that harden, which are widely used to create geocomposite constructions.