bluuebunny/crossref_metadata_2025 huggingface dataset:
Structural characterization of life-extending Caenorhabditis elegans Lipid Binding Protein 8
Authors: Tillman Matthew C. , Khadka Manoj , Duffy Jonathon , Wang Meng C. , Ortlund Eric A.
Published: July 2019

The lysosome plays a crucial role in the regulation of longevity. Lysosomal degradation is tightly coupled with autophagy that is induced by many longevity paradigms and required for lifespan extension. The lysosome also serves as a hub for signal transduction and regulates longevity via affecting nuclear transcription. One lysosome-to-nucleus retrograde signaling pathway is mediated by a lysosome-associated fatty acid binding protein LBP-8 in Caenorhabditis elegans. LBP-8 shuttles lysosomal lipids into the nucleus to activate lipid regulated nuclear receptors NHR-49 and NHR-80 and consequently promote longevity. However, the structural basis of LBP-8 action remains unclear. Here, we determined the first 1.3 Å high-resolution structure of this life-extending protein LBP-8, which allowed us to identify a structurally conserved nuclear localization signal and amino acids involved in lipid binding. Additionally, we described the range of fatty acids LBP-8 is capable of binding and show that it binds to life-extending ligands in worms such as oleic acid and oleoylethanolamide with high affinity.
Frequent Prescribed Fires Can Reduce Risk of Tick-borne Diseases
Authors: Gleim Elizabeth R. , Zemtsova Galina E. , Berghaus Roy D. , Levin Michael L. , Conner Mike , Yabsley Michael J.
Published: July 2019

Recently, a two-year study found that long-term prescribed fire significantly reduced tick abundance at sites with varying burn regimes (burned surrounded by burned areas [BB], burned surrounded by unburned areas [BUB], and unburned surrounded by burned areas [UBB]). In the current study, these ticks were tested for pathogens to more directly investigate the impacts of long-term prescribed burning on human disease risk. A total of 5,103 ticks (4,607 Amblyomma americanum, 76 Amblyomma maculatum, 383Ixodes scapularis, twoIxodes brunneus, and 35Dermacentor variabilis) were testedfor Borreliaspp.,Rickettsiaspp.,Ehrlichiaspp., andAnaplasma phagocytophilum. Long-term prescribed fire did not significantly impact pathogen prevalence except thatA. americanumfrom burned habitats had significantly lower prevalence ofRickettsia(8.7% and 4.6% for BUB and UBB sites, respectively) compared to ticks from control sites (unburned, surrounded by unburned [UBUB])(14.6%). However, during the warm season (spring/summer), encounter rates with ticks infected with pathogenic bacteria was significantly lower (98%) at burned sites than at UBUB sites. Thus, despite there being no differences in pathogen prevalence between burned and UBUB sites, risk of pathogen transmission is lower at sites subjected to long-term burning due to lower encounter rates with infected ticks.
Community Detection on Networks with Ricci Flow
Authors: Ni Chien-Chun , Lin Yu-Yao , Luo Feng , Gao Jie
Published: July 2019

Many complex networks in the real world have community structures – groups of well-connected nodes with important functional roles. It has been well recognized that the identification of communities bears numerous practical applications. While existing approaches mainly apply statistical or graph theoretical/combinatorial methods for community detection, in this paper, we present a novel geometric approach which  enables us to borrow powerful classical geometric methods and properties. By considering networks as geometric objects and communities in a network as a geometric decomposition, we apply curvature and discrete Ricci flow, which have been used to decompose smooth manifolds with astonishing successes in mathematics, to break down communities in networks. We  tested our method on networks with ground-truth community structures, and experimentally confirmed the effectiveness of this geometric approach.
Bipolar Cu/HfO2/p++ Si Memristors by Sol-Gel Spin Coating Method and Their Application to Environmental Sensing
Authors: Abdul Hadi Sabina , Humood Khaled M. , Abi Jaoude Maguy , Abunahla Heba , Shehhi Hamda Faisal Al , Mohammad Baker
Published: July 2019

In this paper, the memristive switching behavior of Cu/ HfO2/p++ Si devices fabricated by an organic-polymer-assisted sol-gel spin-coating method, coupled with post-annealing and shadow-mask metal sputtering steps, is examined. HfO2 layers of about 190 nm and 80 nm, are established using cost-effective spin-coating method, at deposition speeds of 2000 and 4000 rotations per minute (RPM), respectively. For two types of devices, the memristive characteristics (Von, Ion, and Vreset) and device-to-device electrical repeatability are primarily discussed in correlation with the oxide layer uniformity and thickness. The devices presented in this work exhibit an electroforming free and bipolar memory-resistive switching behavior that is typical of an Electrochemical Metallization (ECM) I-V fingerprint. The sample devices deposited at 4000 RPM generally show less variation in electrical performance parameters compared to those prepared at halved spin-coating speed. Typically, the samples prepared at 4000 RPM (n = 8) display a mean switching voltage Von of 3.0 V (±0.3) and mean reset voltage Vreset of −1.1 V (±0.5) over 50 consecutive sweep cycles. These devices exhibit a large Roff/Ron window (up to 104), and sufficient electrical endurance and retention properties to be further examined for radiation sensing. As they exhibit less statistical uncertainty compared to the samples fabricated at 2000 RPM, the devices prepared at 4000 RPM are tested for the detection of soft gamma rays (emitted from low-activity Cs-137 and Am-241 radioactive sources), by assessing the variation in the on-state resistance value upon exposure. The analysis of the probability distributions of the logarithmic Ron values measured over repeated ON-OFF cycles, before, during and after exposing the devices to radiation, demonstrate a statistical difference. These results pave the way for the fabrication and development of cost-effective soft-gamma ray detectors.
Combined Analysis of Methylation and Gene Expression Profiles in Separate Compartments of Small Bowel Mucosa Identified Celiac Disease Patients’ Signatures
Authors: Cielo D. , Galatola M. , Fernandez-Jimenez N. , De Leo L. , Garcia-Etxebarria K. , Loganes C. , Tommasini A. , Not T. , Auricchio R. , Greco L. , Bilbao J. R.
Published: July 2019

By GWAS studies on celiac disease, gene expression was studied at the level of the whole intestinal mucosa, composed by two different compartments: epithelium and lamina propria. Our aim is to analyse the gene-expression and DNA methylation of candidate genes in each of these compartments. Epithelium was separated from lamina propria in biopsies of CeD patients and CTRs using magnetic beads. Gene-expression was analysed by RT-PC; methylation analysis required bisulfite conversion and NGS. Reverse modulation of gene-expression and methylation in the same cellular compartment was observed for the IL21 and SH2B3 genes in CeD patients relative to CTRs. Bioinformatics analysis highlighted the regulatory elements in the genomic region of SH2B3 that altered methylation levels. The cREL and TNFAIP3 genes showed methylation patterns that were significantly different between CeD patients and CTRs. In CeD, the genes linked to inflammatory processes are up-regulated, whereas the genes involved in the cell adhesion/integrity of the intestinal barrier are down-regulated. These findings suggest a correlation between gene-expression and methylation profile for the IL21 and SH2B3 genes. We identified a “gene-expression phenotype” of CeD and showed that the abnormal response to dietary antigens in CeD might be related not to abnormalities of gene structure but to the regulation of molecular pathways.
Serum biomarkers in people with chronic low back pain and Modic 1 changes: a case-control study
Authors: Boisson Margaux , Borderie Didier , Henrotin Yves , Teboul-Coré Stéphanie , Lefèvre-Colau Marie-Martine , Rannou François , Nguyen Christelle
Published: July 2019

We aimed to compare serum biomarkers of inflammation, redox status and cartilage degradation between chronic low back pain (cLBP) patients with and without Modic 1 changes. We used a convenience sample of patients recruited from a single center, case-control study, conducted in a tertiary care center. From December, 2014 to May, 2016, 2,292 patients were consecutively screened, 34 met inclusion criteria and were prospectively enrolled in the present study. Cases (n = 13) were defined as patients with Modic 1 changes detected on MRI and controls (n = 21) as cLBP patients without (Modic 0). To assess serum biomarkers of inflammation, redox status and cartilage degradation, fasting serum samples were collected in a standardized manner and analyzed by immunoassays and spectrophotometry. Mean (95% CI) age was 44.1 (40.0–48.1) years and mean LBP duration was 72.5 (53.0–91.9) months. Serum biomarkers of inflammation (IL-1β, IL-6, IL-8 and TNF-α), redox status (total thiols, advanced oxidation protein products and carbonyl groups) and cartilage degradation (Coll2-1 and Coll2-1NO2) did not differ between cLBP patients with and without Modic 1 changes. In summary, we did not find any differences in serum biomarkers between cLBP patients with and without Modic 1 changes. Interpretation is limited by convenience sampling and small sample size.
Triple-helix molecular-switch-actuated exponential rolling circular amplification for ultrasensitive fluorescence detection of miRNAs
Authors: Zhao Yihan , Wang Yu , Liu Su , Wang Chonglin , Liang Jiaxu , Li Shasha , Qu Xiaonan , Zhang Rufeng , Yu Jinghua , Huang Jiadong
Published: July 2019

We have developed a rapid and high-efficiency fluorescent biosensing platform based on triple-helix molecular-switch (THMS)-actuated exponential rolling circular amplification (RCA) strategy for the ultrasensitive detection of miR-21.
Antibody-guided nanomedicines as novel breakthrough therapeutic, diagnostic and theranostic tools
Authors: Farahavar Ghazal , Abolmaali Samira Sadat , Gholijani Nasser , Nejatollahi Foroogh
Published: July 2019

Antibody-decorated nanomaterials as emerging platforms for therapeutic, diagnostic and theranostic applications.
Torsional chirality generation based on cyclic oligomers constructed from an odd number of pyrenes
Authors: Kurosaki Ryo , Suzuki Mitsuharu , Hayashi Hironobu , Fujiki Michiya , Aratani Naoki , Yamada Hiroko
Published: July 2019

Unique asymmetric compounds with no stereogenic chiral centers are achieved because of an odd number of repeating units.
A coloring tool for spiropyrans: solid state metal–organic complexation versus salification
Authors: Seiler Vanessa Kristina , Robeyns Koen , Tumanov Nikolay , Cinčić Dominik , Wouters Johan , Champagne Benoit , Leyssens Tom
Published: July 2019

Controlling the type of merocyanine metal interaction for broad solid-state coloration.
Biological relevance of charge transfer branching pathways in photolyases
Authors: Holub Daniel , Lamparter Tilman , Elstner Marcus , Gillet Natacha
Published: July 2019

The travel of a positive charge along a branching pathway of tryptophan residues in the PhrA photolyase.
Electronic spectra of flavin in different redox and protonation states: a computational perspective on the effect of the electrostatic environment
Authors: Kabir Mohammad Pabel , Orozco-Gonzalez Yoelvis , Gozem Samer
Published: July 2019

This study discusses how UV/vis absorption spectra of flavin in different redox and protonation states are shifted by the nearby electrostatic microenvironment.
Understanding substrate substituent effects to improve catalytic efficiency in the SABRE hyperpolarisation process
Authors: Stanbury Emma V. , Richardson Peter M. , Duckett Simon B.
Published: July 2019

A quantitative study of substrate–iridium ligation effects identifies a route to achieve more optimal SABRE performance.
Fluorenylporphyrins functionalized by electrochromic ruthenium units as redox-triggered fluorescence switches
Authors: Zhang Xu , Abid Seifallah , Shi Limiao , Williams J. A. Gareth , Fox Mark A. , Miomandre Fabien , Tourbillon Clarisse , Audibert Jean-Frédéric , Mongin Olivier , Paul Frédéric , Paul-Roth Christine O.
Published: July 2019

The electrofluorochromic behaviour of two ruthenium-appended porphyrin dyads has been investigated. Differences in response according to the nature of the interposed aryl linker are rationalised with the aid of electrochemistry and TD-DFT calculations.
Spiropyrans for light-controlled drug delivery
Authors: Cardano Francesca , Del Canto Elisa , Giordani Silvia
Published: July 2019

The supramolecular assembly of acetylsalicylic acid to a merocyanine–Zn complex translates into a photo-controllable drug delivery system.
Zn(ii)-based coordination polymer: An emissive signaling platform for the recognition of an explosive and a pesticide in an aqueous system
Authors: Kumar Trivender , Venkateswarulu M. , Das Bidisa , Halder Aditi , Koner Rik Rani
Published: July 2019

A new emissive Zn(ii)-based coordination polymer (Zn-CP) bearing paddle-wheel clusters has been developed and demonstrated to have potential for recognising a nitroaromatic-based explosive (TNP) and a pesticide (2,6-DCNA) in aqueous solution.
Propene complexes of molybdenum and tungsten stabilized by intramolecular coordination of the 1-(quinol-8-yl)indenyl ligand
Authors: Mrózek Ondřej , Dostál Libor , Císařová Ivana , Honzíček Jan , Vinklárek Jaromír
Published: July 2019

Synthesis, reactivity and properties of unusually stable propene complexes of molybdenum and tungsten are reported.
A novel hydrazide-based selective and sensitive optical chemosensor for the detection of Ni2+ ions: applications in live cell imaging, molecular logic gates and smart phone-based analysis
Authors: Manna Amit Kumar , Chowdhury Shubhamoy , Patra Goutam K.
Published: July 2019

A novel hydrazide-based optical sensor for Ni2+ ions was designed, which can be applied for recovery of contaminated water samples, smart phone-based analysis and live cell imaging.
Transportation of Janus nanoparticles in confined nanochannels: a molecular dynamics simulation
Authors: Wang Xiao , Xiao Senbo , Zhang Zhiliang , He Jianying
Published: July 2019

Transportation of Janus nanoparticles in a confined channel.
Preparation and characterization of selenium enriched-Bifidobacterium longum DD98, and its repairing effects on antibiotic-induced intestinal dysbacteriosis in mice
Authors: Zhu Hui , Zhou Yan , Qi Yan , Ji Rui , Zhang Junliang , Qian Zhixiang , Wu Chunzhen , Tan Jun , Shao Lei , Chen Daijie
Published: July 2019

The aim of this study was to investigate the characteristics of a novel selenium-enriched Bifidobacterium longum DD98 (Se-B. longum DD98) supplement food and its repairing effects on the intestinal ecology of mammals.
Catalytic dehydration of levoglucosan to levoglucosenone using Brønsted solid acid catalysts in tetrahydrofuran
Authors: Oyola-Rivera Oscar , He Jiayue , Huber George W. , Dumesic James A. , Cardona-Martínez Nelson
Published: July 2019

We explored the production of levoglucosenone from levoglucosan using propylsulfonic acid functionalized silica; 59% selectivity was obtained at 100% conversion.
Continuous flow upgrading of glycerol toward oxiranes and active pharmaceutical ingredients thereof
Authors: Morodo Romain , Gérardy Romaric , Petit Guillaume , Monbaliu Jean-Christophe M.
Published: July 2019

A robust continuous flow procedure for the transformation of bio-based glycerol into high value-added β-amino alcohol active pharmaceutical ingredients.
Glutathione responsive poly(HPMA) conjugate nanoparticles for efficient 6-MP delivery
Authors: Xu Weibing , Li Guichen , Long Haitao , Fu Guorui , Pu Lumei
Published: July 2019

GSH-sensitive poly(HPMA)–PTA was developed and its antitumor effect on HepG2 cells was evaluated.
Probing the nature of active chromium species and promotional effects of potassium in Cr/MCM-41 catalysts for methyl mercaptan abatement
Authors: Zhao Yutong , Lu Jichang , Chen Dingkai , Zhang Liming , He Sufang , Han Caiyun , He Dedong , Luo Yongming
Published: July 2019

The introduction of K enables a large number of CrO42− active species to be anchored and dispersed on the surface of Cr-based catalysts.
Single-particle enumeration-based ultrasensitive enzyme activity quantification with fluorescent polymer nanoparticles
Authors: Han Yameng , Ye Zhongju , Wang Fuyan , Chen Tianyu , Wei Lin , Chen Langxing , Xiao Lehui
Published: July 2019

Acetylcholinesterase (AChE) plays a vital role in nerve conduction through rapidly hydrolyzing the neurotransmitter acetylcholine (ACh) and is correlated with Alzheimer's disease.
Extended scaffold glucuronides: en route to the universal synthesis of O-aryl glucuronide prodrugs
Authors: Walther Raoul , Jarlstad Olesen Morten T. , Zelikin Alexander N.
Published: July 2019

An extended scaffold is the key to facile glucuronidation for the synthesis of prodrugs.
Achieving ultrahigh energy storage density and energy efficiency simultaneously in sodium niobate-based lead-free dielectric capacitorsviamicrostructure modulation
Authors: Zhou Mingxing , Liang Ruihong , Zhou Zhiyong , Dong Xianlin
Published: July 2019

Recently, dielectric capacitors have drawn much attention from researchers and engineers due to their ultrahigh power density, ultrafast charge–discharge rate, and good temperature and fatigue stability.
Step-efficient access to new starburst hole-transport materials with carbazole end-groups for perovskite solar cells via direct C–H/C–Br coupling reactions
Authors: Chang Yu-Chieh , Lee Kun-Mu , Ting Chang-Chieh , Liu Ching-Yuan
Published: July 2019

New starburst HTMs are facilely synthesized by direct C–H activation/arylation reactions. Perovskite solar cells based on YC05–08 show promising PCEs of up to 17.4%.
Iron-mediated site-selective oxidative C–H/C–H cross-coupling of aryl radicals with quinones: synthesis of β-secretase-1 inhibitor B and related arylated quinones
Authors: T.P Adarsh Krishna , Pandaram Sakthivel , Ilangovan Andivelu
Published: July 2019

Phenoxy radicals were converted intoparasite selectiveC-aryl radicals and coupled with quinones, using an inexpensive FeCl3–K2S2O8system, to obtain several arylated quinones, in good to moderate yields.
Long non-coding RNA CRNDE promote the progression of tongue squamous cell carcinoma through regulating the PI3K/AKT/mTOR signaling pathway
Authors: Yang Zhongheng , Chen Weizhi
Published: July 2019

Long non-coding RNAs (lnRNAs) colorectal neoplasia differentially expressed (CRNDE) has been identified as a crucial regulator involved in tongue squamous cell carcinoma (TSCC).
Novel diagnostics for point-of-care bacterial detection and identification
Authors: Reali Savannah , Najib Elias Y. , Treuerné Balázs Krisztina E. , Chern Hui Tan Adeline , Váradi Linda , Hibbs David E. , Groundwater Paul W.
Published: July 2019

The WHO global action plan on antimicrobial resistance outlines the need for new diagnostic tools. Point-of-care testing for bacterial infections would enable clinically meaningful interventions using methods that are rapid, low-cost, easy-to-operate, and portable.
Rational design of functionalized covalent organic frameworks and their performance towards CO2 capture
Authors: An Shuhao , Xu Ting , Peng Changjun , Hu Jun , Liu Honglai
Published: July 2019

Two new functionalized covalent organic frameworks containing carbazole and benzothiazole displayed excellent CO2 uptake.
Multi-stage constant-current charging protocol for a high-energy-density pouch cell based on a 622NCM/graphite system
Authors: An Fuqiang , Zhang Rui , Wei Zhiguo , Li Ping
Published: July 2019

A novel multi-stage-constant-current (MS-CC) charging protocol, which charges high-energy-density lithium-ion cells (LICs) at a faster rate, is presented herein.
Correction: An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification
Authors: Sarkar Rajib , Maji Krishnendu , Haldar Debasish
Published: July 2019

Correction for ‘An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification’ by Rajib Sarkar et al., RSC Adv., 2015, 5, 59570–59575.
Reactive oxygen species-triggered off-on fluorescence donor for imaging hydrogen sulfide delivery in living cells
Authors: Hu Yiming , Li Xiaoyi , Fang Yu , Shi Wen , Li Xiaohua , Chen Wei , Xian Ming , Ma Huimin
Published: July 2019

A reactive oxygen species-triggered off-on fluorescence H2S donor is develop for the real-time imaging of H2S delivery and the cytoprotection against the hazardous oxidative environment.
Stable-streamlined cavities following the impact of non-superhydrophobic spheres on water
Authors: Vakarelski Ivan U. , Jetly Aditya , Thoroddsen Sigurdur T.
Published: July 2019

Demonstrated is a stable-streamlined cavity attached to a hydrophilic sphere free-falling in water.
Consolidating the grain boundary of the garnet electrolyte LLZTO with Li3BO3 for high-performance LiNi0.8Co0.1Mn0.1O2/LiFePO4 hybrid solid batteries
Authors: Xie Huilin , Li Chunli , Kan Wang Hay , Avdeev Maxim , Zhu Chenyou , Zhao Zhikun , Chu Xiaorong , Mu Daobin , Wu Feng
Published: July 2019

Li3BO3 co-melts with Li6.4La3Zr1.4Ta0.6O12 to produce an amorphous boracic phase that consolidate the grain boundary, ultimately attaining garnet electrolyte with high Li+ conductivity.
Direct synthesis of electrowettable nanostructured hybrid diamond
Authors: Deshmukh Sujit , Sankaran Kamatchi Jothiramalingam , Banerjee Debosmita , Yeh Chien-Jui , Leou Key-Chyang , Phase Deodatta Maheshwar , Gupta Mukul , Lin I.-Nan , Haenen Ken , Roy Susanta Sinha , Waghmare Prashant R.
Published: July 2019

A low-voltage wetting transition from the Cassie–Baxter state to the Wenzel state was achieved by preparing a needle-like conductive diamond–graphite core–shell nanostructure.
Tuning the defects of the triple conducting oxide BaCo0.4Fe0.4Zr0.1Y0.1O3−δ perovskite toward enhanced cathode activity of protonic ceramic fuel cells
Authors: Ren Rongzheng , Wang Zhenhua , Xu Chunming , Sun Wang , Qiao Jinshuo , Rooney David W. , Sun Kening
Published: July 2019

Ba deficiency is used to tune the electronic, oxygen-ion and proton conduction in BaCo0.4Fe0.4Zr0.1Y0.1O3−δ perovskite for a high-activity cathode of PCFCs.
Nanostructured Co-based bifunctional electrocatalysts for energy conversion and storage: current status and perspectives
Authors: Li Shasha , Hao Xiaogang , Abudula Abuliti , Guan Guoqing
Published: July 2019

Current popular nanostructured Co-based bifunctional electrocatalysts developed for HER/OER and ORR/OER in water splitting and oxygen electrodes are critically reviewed and discussed.
Superior electrocatalytic hydrogen evolution at engineered non-stoichiometric two-dimensional transition metal dichalcogenide edges
Authors: Hu Guoxiang , Fung Victor , Sang Xiahan , Unocic Raymond R. , Ganesh P.
Published: July 2019

Compared with the stoichiometric edges (ZZSe and ZZMo), there is a wider family of synthesizable non-stoichiometric MoSe2edges, where the degree of non-stoichiometry can be tuned to potentially achieve optimal HER activity.
Duplex trapping and charge transfer with polysulfides by a diketopyrrolopyrrole-based organic framework for high-performance lithium–sulfur batteries
Authors: Xu Jie , Bi Shiming , Tang Weiqiang , Kang Qi , Niu Dongfang , Hu Shuozhen , Zhao Shuangliang , Wang Limin , Xin Zhong , Zhang Xinsheng
Published: July 2019

The duplex trapping behavior between a DPP-based POF and polysulfides is propitious for maintaining active substances and restricting the shuttle effect, realizing Li–S batteries with high rate, high sulfur content and high capacity retention.
Fabrication of PMPC/PTM/PEGDA micropatterns onto polypropylene films behaving with dual functions of antifouling and antimicrobial activities
Authors: Jiang Liu , Zhu Wancheng , Qian Huaming , Wang Changhao , Chen Yashao , Liu Peng
Published: July 2019

Bifunctional micropatterns on polypropylene films with excellent antifouling and antimicrobial performances were constructed by plasma activation, photomask technique and UV-initiated graft polymerization.
PEDOT:PSS interfaces stabilised using a PEGylated crosslinker yield improved conductivity and biocompatibility
Authors: Solazzo Matteo , Krukiewicz Katarzyna , Zhussupbekova Ainur , Fleischer Karsten , Biggs Manus J. , Monaghan Michael G.
Published: July 2019

The rapidly expanding fields of bioelectronics, and biological interfaces with sensors and stimulators, are placing an increasing demand on candidate materials to serve as robust surfaces that are both biocompatible, stable and electroconductive.
Enhanced long wavelength omnidirectional photoresponses in photonic-structured perovskite photodetectors
Authors: Li Ning , Lan Weixia , Lau Ying Suet , Cai Linfeng , Syed Ali Asgher , Zhu Furong
Published: July 2019

Photoresponsivity of the photonic-structured organo-lead triiodide (CH3NH3PbI3) perovskite photodetectors is less dependent on the angle of the incident light and has an enhanced omnidirectional photoresponse in the near infrared wavelength range.
Stable antiferromagnetic nanocrystals for room temperature applications: the case of iron nitride
Authors: Kowalik Iwona Agnieszka , Gonzalez Szwacki Nevill , Niño Miguel Ángel , Luque Francisco Jesús , Arvanitis Dimitri
Published: July 2019

We characterise the magnetism of self-assembled FenN nanocrystals, combining core level spectroscopy with first-principles theory. Ferromagnetic and antiferromagnetic phases are found, which are magnetically ordered at room temperature.
Great advance in high Tc for hybrid photoelectric-switch bulk/film coupled with dielectric and blue-white light
Authors: Gao Ya-Fang , Zhang Tie , Zhang Wan-Ying , Ye Qiong , Fu Da-Wei
Published: July 2019

The hybrid compound [ASD]2[ZnBr4] demonstrates excellent multi-channel, high Tc of 380 K, super-flexibility and broad-band blue-white light emitting bulk/film.
PLL with frequency and initial‐phase‐angle detectors: performance analysis and speed/robustness trade‐off improvement
Authors: Zarei Mohammad , Karimadini Mohammad
Published: July 2019

Phase‐locked loops (PLLs) are well known tools for synchronisation and measurement of the fundamental parameters of power grid signals. Signals measured in the electrical industry may contain disturbances such as harmonic distortion, dc offset, noise and unbalanced conditions which destroy the pure sinusoidal form of signals. The present study improves the trade‐off between PLL disturbance‐rejection capability and dynamic‐response speed. An improved PLL is proposed based on frequency and initial‐phase‐angle detectors (FIPD) and moving average filter for measurement of the signal parameters in both single‐phase and three‐phase applications. The proposed PLL is called improved FIPD‐based PLL (IFIP‐PLL) and provides satisfactory disturbance rejection and response time. The proposed structure effectively decreases the estimation error. Simulation and experimental results show the superiority of IFIP‐PLL over conventional PLLs.
Three‐dimensional optimal focusing imaging algorithm for wall‐penetrating radar
Authors: Li Yinchuan , Zhao Yikun , Xiang Yin , Ding Zegang , Liu Haibo , Liu Quanhua
Published: July 2019

Wall‐penetrating radar (WPR) is the device to image very small objects buried inside the wall. The small objects usually a few millimetres, whereas the bandwidth of WPR limits its resolution up to several centimetres. As a result, the target imaging result of the traditional method is ‘defocused’ in the range direction. To solve this problem, a near‐field three‐dimensional imaging algorithm based on matching filtering with multiple reference signals and selection processing is proposed. Instead of obtaining a focused image via coherent superposition processing, a focused image is determined by selecting an image from a plurality imaging results of different reference depths according to the minimum entropy criterion. The proposed algorithm is validated by imaging the computer simulation technology simulation data and the measured data.
First observations of an outbursting comet with the MUSE integral-field spectrograph
Authors: Opitom C. , Yang B. , Selman F. , Reyes C.
Published: July 2019

We present the first observations of outbursting comet C/2015 ER61 (PANSTARRS) with the Multi-Unit Spectroscopic Explorer (MUSE). The comet was observed on April 9, 2017, only five days after it underwent a significant outburst during which the total brightness increased by a factor of ~7.5. Based on the MUSE observations, we produce simultaneous maps of the CN, C2, NH2 comae, and the dust coma. In turn, we applied image enhancement techniques in order to reveal features in the coma. By comparing the coma morphology for the dust and CN, C2, and NH2, we investigate the release mechanism of those gas species in the coma of comet ER61. We present evidence that NH2 could be released by icy or organic-rich dust grains.
Average surface flows before the formation of solar active regions and their relationship to the supergranulation pattern
Authors: Birch A. C. , Schunker H. , Braun D. C. , Gizon L.
Published: July 2019

Context. The emergence of solar active regions is an important but poorly understood aspect of the solar dynamo.

Aims. Knowledge of the flows associated with the rise of active-region-forming magnetic concentrations through the near-surface layers will help determine the mechanisms of active region formation.

Methods. We used helioseismic holography and granulation tracking to measure the horizontal flows at the surface that precede the emergence of active regions. We then averaged these flows over about sixty emerging active regions to reduce the noise, selecting active regions that emerge into relatively quiet Sun. To help interpret the results, we constructed a simple model flow field by generating synthetic “emergence locations” that are probabilistically related to the locations of supergranulation-scale convergence regions in the quiet Sun.

Results. The flow maps obtained from helioseismology and granulation tracking are very similar (correlation coefficients for single maps around 0.96). We find that active region emergence is, on average, preceded by converging horizontal flows of amplitude about 40 m s−1. The convergence region extends over about 40 Mm in the east-west direction and about 20 Mm in the north-south direction and is centered in the retrograde direction relative to the emergence location. This flow pattern is largely reproduced by a model in which active region emergence occurs preferentially in the prograde direction relative to supergranulation inflows.

Conclusions. Averaging over many active regions reveals a statistically significant pattern of near-surface flows prior to emergence. The qualitative success of our simple model suggests that rising flux concentrations and supergranule-scale flows interact during the emergence process.
Regularity of the minimiser of one-dimensional interaction energies
Authors: Kimura M. , van Meurs P.
Published: July 2019

We consider both the minimisation of a class of nonlocal interaction energies over non-negative measures with unit mass and a class of singular integral equations of the first kind of Fredholm type. Our setting covers applications to dislocation pile-ups, contact problems, fracture mechanics and random matrix theory. Our main result shows that both the minimisation problems and the related singular integral equations have the same unique solution, which provides new regularity results on the minimiser of the energy and new positivity results on the solutions to singular integral equations.
The analysis of the causes of the collapse of two timber sheds during the construction
Authors: Szczotka Józef
Published: July 2019

The paper describes collapses of two timber sheds located in Cieszyn and Zebrzydowice, Poland. The collapses took place during the construction process. The structures of the sheds are described, the construction works are analysed, the causes of the collapses are determined and the recommendations and technical solutions regarding their repair are presented.
Causes of failure of a four-storey building and the reconstruction concept
Authors: Rzeźniczak Jerzy , Młynarek Zbigniew , Gogolik Sławomir , Michalak Joanna
Published: July 2019

The article presents causes of failure of a four-storey building of a complex structure. It reviews the causes related to soil features, foundation works and construction design of the facility. The article rationalizes the concept of soil improvement using the jet-grouting technology and suggests eliminating the process of flooding and damping basements of the building.
Discontinuous terrain deformation - forecasting and consequences of their occurrence for building structures
Authors: Szojda Leszek , Wandzik Grzegorz
Published: July 2019

The paper is devoted to the influence of mining origin discontinuous deformations of on buildings. In the first part the forms of deformations, their classification, examples and reasons of their formation is discussed. It is supplemented with other classification (cited from literature) related to risk for buildings with regard to the type and intensity of deformation. In the next part, examples of damages of three various buildings located in zones of faults and sinkholes. They were: simple detached house, multi-storey and hall buildings. All of them were the subject of expertizes prepared by the authors. The type of influences and the nature of damages are illustrated with photographs and discussed. In the last part the threats due to the nature of the buildings – their height and size – are discussed. The influence of the location of deformation edge (fault, sinkhole, terrain step) in relation to the object is shortly analyzed. Examples of normal stress distribution in subsoil obtained in numerical calculations have been briefly presented. Some attention have been also paid on protection methods and their effectiveness.
Commercial building flooring failure caused by swelling of the foundation layers
Authors: Kwiecień Sławomir
Published: July 2019

The work describes the damage, testing and method of repairing the flooring. The flooring formed part of a commercial pavilion covering an area of approx. 1200 m2. Significant damage in the form of cracks and elevations of up to a height of almost 80 mm were detected in the flooring. Geodetic, laboratory and geotechnical tests were carried out to determine the causes of the damage. The cause was found to be swelling of the floor base course layers, consisting of embankments made of unburnt colliery shale mixed with ashes. The swelling processes ceased about 5 years after the structure was commissioned.
Causes and consequences of a construction disaster in a historic church
Authors: Bednarz Lukasz , Opalka Piotr
Published: July 2019

Paper concerns a construction disaster, which took place on June 4, 2018 in the 14th century St. George church in Hajduki Nyskie (Opole Voivodeship). The object is famous for its well-preserved 15th century wall polychromes. During the construction works, the eastern gable wall, part of the barrel vault with lunettes and part of the orchid roof truss collapsed at the roof truss. Some elements of the equipment were also destroyed. As a result of the catastrophe, valuable wall polychromes were directly threatened. Paper presents the causes and consequences of the catastrophe.
Degradation of architectural precast concrete elements on the facade of St. Michael the Archangel church in Warsaw
Authors: Adamczewski Grzegorz , Woyciechowski Piotr
Published: July 2019

The paper presents the case study of the degradation of architectural precast concrete elements on the facade of St. Michael the Archangel church in Warsaw. The background of the contemporary precast non-standard prefabrication was presented with the examples of polish recent applications. The GPR (ground penetrating radar) method was used in determining the location of reinforcement in the precast elements in the degraded façade. The conceptions of repair were analyzed and the reasons of the destructions of the precast elements.
Case study of a derecho wind storm on August 11-12, 2017 in Poland: part one
Authors: Chmielewski Tadeusz , Szer Jacek , Bobra Piotr
Published: July 2019

Windstorms belong to the most costly natural threats in Poland. On August 11-12, 2017, a strong thunderstorm happened which resulted in a catastrophic damage in three provinces: Wielkopolskie, Kujawsko-Pomorskie, and Pomorskie. This disaster has resulted in the death of 6 people, injuries to several dozen people, and enormous property losses including approximately 16,000 residential, utility and public buildings, 80,000 hectares of forest area, 67,000 hectares of agricultural crops, in excess of 300 overhead power line poles, and over 200 cables were downed. The trees felled by the wind blocked and partially damaged local and municipal roads over a length of about 1100 km. Over 500,000 consumers were deprived of electricity at the peak of the disaster. The purpose of this paper is to describe, analyse, and learn from such a dangerous extreme weather event. In order to achieve this, a cause of the thunderstorm, its important meteorological data, the severity of damage to buildings, civil infrastructure and environment, processes of damage surveys, ideas for reconstruction and removing of all damage, financial assistance from the central government, local authorities, and public collections were studied for better preparation of all services and people for mitigation of the effects of a natural disaster which may happen in the future. An example of a building with improved stiffness as the solution for better resistance of wind forces is presented.
Analysis of stabilisation method of gable walls of a barrack located at the section BI of the former KL Auschwitz II-Birkenau
Authors: Gromysz Krzysztof , Szoblik Łukasz , Cyrulik Ewa , Tanistra-Różanowska Agnieszka , Drabczyk Zofia , Jancia Szymon
Published: July 2019

The subject of the article is an analysis of the stabilisation method of the western gable walls of a barrack with the inventory number B-123, situated at the section BI of the former German Nazi concentration and extermination camp Auschwitz II-Birkenau. The barracks of the former Birkenau have a documentary and historical value and are subject to protective conservation. A barrack with inv. no. B-123 had been erected in the last months of 1941 as a residential barrack, then it was used as a hospital facility. The barrack walls are characterised by low stiffness, because with the building’s plan of 36.17 m  11.39 m, the walls are only 0.12 m thick. Gable walls have been greatly deformed, as a result they have detached from longitudinal walls and their deflection is up to 120 mm. The construction of the walls is at risk, because a bad-quality wall is loaded with horizontal and vertical forces transmitted from the roof, on the eccentricity reaching 120 mm. Deformations are progressing as a consequence of such forces and the walls must be stabilised. In case of the western wall, it was decided to stop its further deformation and to increase the local carrying capacity by stabilising with steel elements connected with ties anchored in the ground. Given the historical value of the plasters with paint coats layers covering the wall, it was decided not to remove the wall deformation mechanically. For the eastern wall, which is not covered with plaster and was partly reconstructed after the war, the removal of its deflection by rectification was designed.
Application of the Takaga-Sugeno neuro-fuzzy model for determining of engineering structures
Authors: Mrówczyńska Maria
Published: July 2019

The objective of the paper is to show the role of geodetic monitoring and modern methods of measurement data processing with the use of neural-fuzzy systems in identifying changes occurring in engineering structures. Fast methods of measurement and data processing are of key importance whenever rapidly changing phenomena should be captured (e.g. deformations of buildings, fires spreading in forest areas, flood waves, landslides caused by endogenous and exogeonic factors). Processes and phenomena occurring in engineering structures can be modelled based on information obtained by geodetic monitoring. At present, elements of geodetic technologies are being supplemented with artificial intelligence methods, which include neuro-fuzzy systems. These systems can process information that is provided at the input both as numerical and linguistic values. This approach is used for qualitative assessment of the condition of objects and physical quantities and it is characterized by parallel information processing. The paper presents the possibility of using the Takaga-Sugeno neural-fuzzy model for prediction and assessment of horizontal and vertical displacements of engineering structures as illustrated by the example of a historical footbridge in Muskauer Park, located in Germany and Poland.
Hazards induced by thermal conditions during work on scaffolding
Authors: Szer Iwona , Szer Jacek
Published: July 2019

The article presents the results of research on hazards induced by thermal conditions illustrated by the example of air temperature. Presented results concern ten construction scaffoldings located in Wroclaw, which were investigated from May 30 to October 14, 2016. The scaffolding area ranged from 146 m2 to 1303 m2. On three scaffoldings, the air temperature was above 40 ̊C. The air temperature in 46 % of cases was in the unfavorable for employees temperature range. In addition, people working on scaffoldings are exposed in most cases to strong or severe thermal stimuli connected with large temperature differences during the working day. Unfavorable, dynamically changing climatic conditions pose a serious threat to people working outside. There is an increase in errors, and as a result the risk of situations that could lead to an accident increases.
Failure of the overhead crane runway
Authors: Kossakowski Paweł , Wciślik Wiktor , Bakalarz Michał
Published: July 2019

The paper reports a failure of the overhead crane runway. Failures of this type often occur in industrial buildings that have been in operation for a long period of time. The reasons are dynamic, fatigue-related phenomena in crane operations, and also design and structural errors. An important issue is also the presence of geometric notches, which promote the formation of fatigue cracks, accelerating the process of degradation of the structure. Visual inspection of the overhead crane runways revealed loosening and failure of rail – beam connections, and also substantial horizontal and vertical displacements of the rails. Additionally, geodetic measurements of rail arrangement were taken. They indicated the exceeding of permissible deviations for rails spacing and vertical arrangement stated in the relevant standards. The runway damages resulted from dynamic character of the loads applied. In some cases, high crane travel speed and acceleration produced impact forces that affected the runway structure. Vertical and horizontal deformation of rails was an additional source of impact in the crane runs. Another contributing factor was inappropriate design of rails and beams fastening, and also insufficient number of rail dilatations. A repair program was proposed which involved the use of additional rail fastenings and dilatations.
Anatomy of Failures: Stability Requirements in All Stages of Operations
Authors: Moncarz Piotr , Bishop Cliff
Published: July 2019

The paper provides examples of how temporary conditions experienced during construction, retrofit, or repair can bring an otherwise robust structure to failure. The KTVO Tower near Kirksville, Missouri, USA, guyed by seven tiers of guy cables, stood 610 m tall, until it suddenly collapsed on June 2, 1988. The collapse occurred during the replacement of potentially defective braces. The Tower had been subject to severe weather conditions, as well as having previously lost some braces; and yet, the experienced repair company brought it down through altered brace replacement employed by the repair crew. How did it happen? This paper goes through all the stages of this tragic event; from the failure scene back through failure analysis to the design, manufacturing, material supplies, and fatally altered repair procedure. This paper also provides an example of reinforced concrete structures which are erected with the steel reinforcement delivered to their final position as a multi-story cage lifted in-place by crane and acting as temporary independent structures. Their stability relies on proper bracing and restraint. What if some of the bracing becomes an obstacle to some activities? The paper concludes with best practices for involving a licensed professional at all stages of construction or repair in order to help prevent future collapses.
Failure of a steel boiler chimney caused by corrosion of the structural shell plate
Authors: Pisarek Zdzislaw
Published: July 2019

The article presents issues concerning the corrosion of sheets of the guyed steel chimney with boiler house in an industrial plant. The subject of considerations is a steel chimney with a height of 46.5 m and a diameter of 1.25 m. The chimney was used for seventeen years and did not show any significant corrosion losses. After the change of the way of usage and the fuel used for feeding boilers, the corrosion rate has dramatically increased. The paper presents issues concerning corrosion types and mechanisms of corrosion degradation of the steel. The reasons for the increase of corrosion velocity within the chimney base were given. The method of chimney renovation and the results of this renovation, detailing the order of works is presented too. Attention was also paid to the proper maintenance of construction works, as periodic inspections themselves may be insufficient to ensure safe operation.
50 years have passed, current state, studies and safety assessment of hanging roof above the main sport and entertainment hall in Katowice
Authors: Szydłowski Rafał , Łabuzek Barbara
Published: July 2019

The article presents a brief description of the 50-year-old history of the Katowice “Spodek”, and cites the selected facts about the object, beginning at the stage of design and realization to exploitation. The structure of the building has been described with great emphasis on the construction of the covering suspended on cable girders in combination with original architecture was an extremely bold constructional solution of those times. The main part of this work includes results of research from force measurements conducted in tendons realized in the present year, that is in 2019, together with their analysis with reference to archival results from research conducted in the years 1971, 1978, 1985, 1990 or 2006. Particular attention is drawn to the fact, that despite the passage of time, the elaborated method for measurements and measurement devices used for research has not changed across the years and still allows to obtain the relevant picture of the construction’s performance. The obtained results have shown that the assumptions adopted for the then innovative solutions were received correctly, and the renovation works in the scope of roof covering significantly disburdened the construction, allowing a considerable safety reserve despite its over half-century exploitation.
Postoperative Herzrhythmusstörungen
Authors: Baldes Natalie , Bergmann Thomas , Bölükbas Servet
Published: July 2019

Herzrhythmusstörungen gehören zu den häufigsten Komplikationen nach Lungenresektionen. Diese verzögern oft die Rekonvaleszenz und können sich auf die kurz- und langfristige Prognose der Patienten auswirken. Die vorliegende Übersichtsarbeit konzentriert sich auf die Pathophysiologie, die Risikofaktoren, die Prävention sowie die Therapie insbesondere des Vorhofflimmerns bei Patienten nach Lungenresektionen.