bluuebunny/crossref_metadata_2025 huggingface dataset:
Oviposition Preference of the Cabbage Root Fly towards Some Chinese Cabbage Cultivars: A Search for Future Trap Crop Candidates
Authors: Lamy Fabrice , Bellec Laura , Rusu-Stievenard Amélie , Clin Pauline , Ricono Claire , Olivier Diane , Mauger Solène , Poinsot Denis , Faloya Vincent , Daniel Loïc , Cortesero Anne Marie
Published: February 2020

The development of integrated pest management strategies becomes more and more pressing in view of potential harmful effects of synthetic pesticides on the environment and human health. A promising alternative strategy against Delia radicum is the use of trap crops. Chinese cabbage (Brassica rapa subsp. pekinensis and subsp. chinensis) is a highly sensitive Brassicaceae species previously identified as a good candidate to attract the cabbage root fly away from other crops. Here, we carried out multi-choice experiments both in the laboratory and in field conditions to measure the oviposition susceptibilities of different subspecies and cultivars of Chinese cabbages as compared to a broccoli reference. We found large differences among subspecies and cultivars of the Chinese cabbage, which received three to eleven times more eggs than the broccoli reference in field conditions. In laboratory conditions, the chinensis subspecies did not receive more eggs than the broccoli reference. We conclude that D. radicum largely prefers to lay eggs on the pekinensis subspecies of Chinese cabbage compared to the chinensis subspecies or broccoli. Some pekinensis cultivars, which received over ten times more eggs than broccoli in the field, appear especially promising candidates to further develop trap crop strategies against the cabbage root fly.
Spittlebugs of Mediterranean Olive Groves: Host-Plant Exploitation throughout the Year
Authors: Bodino Nicola , Cavalieri Vincenzo , Dongiovanni Crescenza , Saladini Matteo Alessandro , Simonetto Anna , Volani Stefania , Plazio Elisa , Altamura Giuseppe , Tauro Daniele , Gilioli Gianni , Bosco Domenico
Published: February 2020

Spittlebugs are the vectors of the bacterium Xylella fastidiosa Wells in Europe, the causal agent of olive dieback epidemic in Apulia, Italy. Selection and distribution of different spittlebug species on host-plants were investigated during field surveys in 2016–2018 in four olive orchards of Apulia and Liguria Regions of Italy. The nymphal population in the herbaceous cover was estimated using quadrat samplings. Adults were collected by sweeping net on three different vegetational components: herbaceous cover, olive canopy, and wild woody plants. Three species of spittlebugs were collected: Philaenus spumarius L., Neophilaenus campestris (Fallén), and Aphrophora alni (L.) (Hemiptera: Aphrophoridae). Philaenus spumarius was the predominant species both in Apulia and Liguria olive groves. Nymphal stages are highly polyphagous, selecting preferentially Asteraceae Fabaceae plant families, in particular some genera, e.g., Picris, Crepis, Sonchus, Bellis, Cichorium, and Medicago. Host-plant preference of nymphs varies according to the Region and through time and nymphal instar. In the monitored sites, adults peak on olive trees earlier in Apulia (i.e., during inflorescence emergence) than in Liguria (i.e., during flowering and beginning of fruit development). Principal alternative woody hosts are Quercus spp. and Pistacia spp. Knowledge concerning plant selection and ecological traits of spittlebugs in different Mediterranean olive production areas is needed to design effective and precise control strategies against X. fastidiosa vectors in olive groves, such as ground cover modifications to reduce populations of spittlebug vectors.
Quantitative Study of Morphological Features of Stem Cells onto Photopatterned Azopolymer Films
Authors: Salvatore Marcella , Oscurato Stefano Luigi , D’Albore Marietta , Guarino Vincenzo , Zeppetelli Stefania , Maddalena Pasqualino , Ambrosio Antonio , Ambrosio Luigi
Published: February 2020

In the last decade, the use of photolithography for the fabrication of structured substrates with controlled morphological patterns that are able to interact with cells at micrometric and nanometric size scales is strongly growing. A promising simple and versatile microfabrication method is based on the physical mass transport induced by visible light in photosensitive azobenzene-containing polymers (or azopolymers). Such light-driven material transport produces a modulation of the surface of the azopolymer film, whose geometry is controlled by the intensity and the polarization distributions of the irradiated light. Herein, two anisotropic structured azopolymer films have been used as substrates to evaluate the effects of topological signals on the in vitro response of human mesenchymal stem cells (hMSCs). The light-induced substrate patterns consist of parallel microgrooves, which are produced in a spatially confined or over large-scale areas of the samples, respectively. The analysis of confocal optical images of the in vitro hMSC cells grown on the patterned films offered relevant information about cell morphology—i.e., nuclei deformation and actin filaments elongation—in relation to the geometry and the spatial extent of the structured area of substrates. The results, together with the possibility of simple, versatile, and cost-effective light-induced structuration of azopolymers, promise the successful use of these materials as anisotropic platforms to study the cell guidance mechanisms governing in vitro tissue formation.
Genome Sequencing and Analysis of Thraustochytriidae sp. SZU445 Provides Novel Insights into the Polyunsaturated Fatty Acid Biosynthesis Pathway
Authors: Zhu Xingyu , Li Shuangfei , Liu Liangxu , Li Siting , Luo Yanqing , Lv Chuhan , Wang Boyu , Cheng Christopher H. K. , Chen Huapu , Yang Xuewei
Published: February 2020

Thraustochytriidae sp. have broadly gained attention as a prospective resource for the production of omega-3 fatty acids production in significant quantities. In this study, the whole genome of Thraustochytriidae sp. SZU445, which produces high levels of docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA), was sequenced and subjected to protein annotation. The obtained clean reads (63.55 Mb in total) were assembled into 54 contigs and 25 scaffolds, with maximum and minimum lengths of 400 and 0.0054 Mb, respectively. A total of 3513 genes (24.84%) were identified, which could be classified into six pathways and 44 pathway groups, of which 68 genes (1.93%) were involved in lipid metabolism. In the Gene Ontology database, 22,436 genes were annotated as cellular component (8579 genes, 38.24%), molecular function (5236 genes, 23.34%), and biological process (8621 genes, 38.42%). Four enzymes corresponding to the classic fatty acid synthase (FAS) pathway and three enzymes corresponding to the classic polyketide synthase (PKS) pathway were identified in Thraustochytriidae sp. SZU445. Although PKS pathway-associated dehydratase and isomerase enzymes were not detected in Thraustochytriidae sp. SZU445, a putative DHA- and DPA-specific fatty acid pathway was identified.
Marine Glycoconjugates: Trends and Perspectives
Authors: Kalinin Vladimir I. , Stonik Valentin A. , Ivanchina Natalia V.
Published: February 2020

Glycoconjugates play significant roles in biological systems and are used in medicine, for example as vaccines [...]
De novo NIPBL Mutations in Vietnamese Patients with Cornelia de Lange Syndrome
Authors: Thanh Duong Chi , Ngoc Can Thi Bich , Nguyen Ngoc-Lan , Vu Chi Dung , Tung Nguyen Van , Nguyen Huy Hoang
Published: February 2020

Cornelia de Lange Syndrome (CdLS) is a rare congenital genetic disease causing abnormal unique facial phenotypes, several defects in organs and body parts, and mental disorder or intellectual disorder traits. Main causes of CdLS have been reported as variants in cohesin complex genes, in which mutations in the NIPBL gene have been estimated to account for up to 80%. Our study included three Vietnamese patients with typical CdLS phenotypes. Whole exome sequencing revealed two known heterozygous mutations c.6697G>A (p.Val2233Met) and c.2602C>T (p.Arg868X), and a novel heterozygous mutation c.4504delG (p.Val1502fsX87) in the NIPBL gene of the three patients. In silico analyses of the identified mutations predicted possible damaging and truncating effects on the NIPBL protein. Inherited analyses in the patients’ families showed that all of the mutations are de novo. Our results lead a definitive diagnosis of patients with CdLS and expand the spectrum of mutations in the NIPBL gene. These findings also confirm whole exome sequencing is an efficient tool for genetic screening of CdLS.
Circulating Soluble Urokinase-Type Plasminogen Activator Receptor in Obstructive Sleep Apnoea
Authors: Bocskei Renata Marietta , Meszaros Martina , Tarnoki Adam Domonkos , Tarnoki David Laszlo , Kunos Laszlo , Lazar Zsofia , Bikov Andras
Published: February 2020

Background and Objectives: Obstructive sleep apnoea (OSA) is associated with heightened systemic inflammation and a hypercoagulation state. Soluble urokinase-type plasminogen activator receptor (suPAR) plays a role in fibrinolysis and systemic inflammation. However, suPAR has not been investigated in OSA. Materials and Methods: A total of 53 patients with OSA and 15 control volunteers participated in the study. Medical history was taken and in-hospital sleep studies were performed. Plasma suPAR levels were determined by ELISA. Results: There was no difference in plasma suPAR values between patients with OSA (2.198 ± 0.675 ng/mL) and control subjects (2.088 ± 0.976 ng/mL, p = 0.62). Neither was there any difference when patients with OSA were divided into mild (2.134 ± 0.799 ng/mL), moderate (2.274 ± 0.597 ng/mL) and severe groups (2.128 ± 0.744 ng/mL, p = 0.84). There was no significant correlation between plasma suPAR and indices of OSA severity, blood results or comorbidities, such as hypertension, diabetes, dyslipidaemia or cardiovascular disease. Plasma suPAR levels were higher in women when all subjects were analysed together (2.487 ± 0.683 vs. 1.895 ± 0.692 ng/mL, p < 0.01), and also separately in controls (2.539 ± 0.956 vs. 1.411 ± 0.534 ng/mL, p = 0.02) and patients (2.467 ± 0.568 vs. 1.991 ± 0.686 ng/mL, p < 0.01). Conclusions: Our results suggest that suPAR does not play a significant role in the pathophysiology of OSA. The significant gender difference needs to be considered when conducting studies on circulating suPAR.
Modeling Mechanical Properties of 25Cr-20Ni-0.4C Steels over a Wide Range of Temperatures by Neural Networks
Authors: Narayana P. L. , Kim Jae H. , Maurya A. K. , Park Chan Hee , Hong Jae-Keun , Yeom Jong-Taek , Reddy N. S.
Published: February 2020

From the point of view of designing materials, it is important to study the complex correlational research that involves measuring several variables and assessing the relation among them. Hence, the notion of machine-oriented data modeling is explored. Among various machine-learning tools, artificial neural networks (ANN) have been used as a stimulating tool to solve engineering-related issues. In this study, the ANN model is designed and trained to correlate the complex relations among composition, temperature and mechanical properties of 25Cr-20Ni-0.4C austenitic stainless steel. The developed model was exploited to estimate the composition–property and temperature–property correlations. The ANN predictions are well suitable for experimental results. The model was able to correlate the complex nature among input and output variables. The model was used to investigate the effect of service temperature on the mechanical properties of 25Cr-20Ni-0.4C steels over a wide temperature range. The effective response of the alloying elements on the mechanical properties of ambient as well as elevated temperatures was quantitatively estimated with the help of the index of relative importance (IRI) method. Hence, this handy technique is the best tool to overcome the designing complications and to develop the components having remarkable properties.
Low Cycle Fatigue Behavior of Elbows with Local Wall Thinning
Authors: Harun Muhammad Faiz , Mohammad Roslina , Kotousov Andrei
Published: February 2020

There have been a number of studies concerning the integrity of high-strength carbon steel pipe elbows weakened by local pipe wall thinning, the latter can be typically caused by flow accelerated erosion/corrosion. In particular, the focus of several recent studies was on low cycle fatigue behavior of damaged elbows, mainly, in relation to strength and integrity of piping systems of nuclear power plants subjected to extreme loading conditions, such as earthquake or shutdown. The current paper largely adopts the existing methodology, which was previously developed, and extends it to copper-nickel elbows, which are widely utilized in civil infrastructure in seismically active regions. FE (finite element) studies along with a full-scale testing program were conducted and the outcomes are summarized in this article. The overall conclusion is that the tested elbows with various severity of local wall thinning, which were artificially introduced at different locations, demonstrate a strong resistance against low cycle fatigue loading. In addition, elbows with wall thinning defects possess a significant safety margin against seismic loading. These research outcomes will contribute to the development of strength evaluation procedures and will help to develop more effective maintenance procedures for piping equipment utilized in civil infrastructure.
The Effect of Electroslag Remelting on the Microstructure and Mechanical Properties of CrNiMoWMnV Ultrahigh-Strength Steels
Authors: Ali Mohammed , Porter David , Kömi Jukka , Eissa Mamdouh , El Faramawy Hoda , Mattar Taha
Published: February 2020

The effect of electroslag remelting (ESR) with CaF2-based synthetic slag on the microstructure and mechanical properties of three as-quenched martensitic/martensitic-bainitic ultrahigh-strength steels with tensile strengths in the range of 1250–2000 MPa was investigated. Ingots were produced both without ESR, using induction furnace melting and casting, and with subsequent ESR. The cast ingots were forged at temperatures between 1100 and 950 °C and air cooled. Final microstructures were investigated using laser scanning confocal microscopy, field emission scanning electron microscopy, electron backscatter diffraction, electron probe microanalysis, X-ray diffraction, color etching, and micro-hardness measurements. Mechanical properties were investigated through measurement of hardness, tensile properties and Charpy-V impact toughness. The microstructures of the investigated steels were mainly auto-tempered martensite in addition to small fractions of retained austenite and bainite. Due to the consequences of subtle modifications in chemical composition, ESR had a considerable impact on the final microstructural features: Prior austenite grain, effective martensite grain, and lath sizes were refined by up to 52%, 38%, and 28%, respectively. Moreover, the 95th percentiles in the cumulative size distribution of the precipitates decreased by up to 18%. However, ESR had little, if any, the effect on microsegregation. The variable effects of ESR on mechanical properties and how they depend on the initial steel composition are discussed.
Reaction Layer Analysis of In Situ Reinforced Titanium Composites: Influence of the Starting Material Composition on the Mechanical Properties
Authors: Montealegre-Meléndez Isabel , Arévalo Cristina , Beltrán Ana M. , Kitzmantel Michael , Neubauer Erich , Pérez Soriano Eva María
Published: February 2020

This study aims at the analysis of the reaction layer between titanium matrices and reinforcements: B4C particles and/or intermetallic TixAly. Likewise, the importance of these reactions was observed; this was particularly noteworthy as regard coherence with the obtained results and the parameters tested. Accordingly, five starting material compositions were studied under identical processing parameters via inductive hot pressing at 1100 °C for 5 min in vacuum conditions. The results revealed how the intermetallics limited the formation of secondary phases (TiC and TiB) created from the B and C source. In this respect, the percentages of TiB and TiC slightly varied when the intermetallic was included in the matrix as prealloyed particles. On the contrary, if the intermetallics appeared in situ by the addition of Ti-Al powder in the starting blend, their content was lesser. The mechanical properties values and the tribology behaviour might deviate, depending on the percentage of the secondary phases formed and its distribution in the matrix.
Preparation and Properties of Special Vehicle Cover via a Novel Squeeze Casting Quantitative Feeding System of Molten Metal
Authors: Qi Yushi , Chen Lili , Chen Gang , Li Kefeng , Li Chao , Du Zhiming
Published: February 2020

A quantitative feeding system of molten metal was designed based on a special vehicle cover, which achieved the quantitative transport of molten metal in a fully enclosed environment. There are lots of advantages of this novel device, such as improving the accuracy of the molten metal pouring, reducing the oxide inclusions defects, improving the quality of forming parts, etc. The numerical simulation of the casting process of filling mold was carried out based on the software ProCAST, which optimized the processing parameters of the quantitative feeding device. The result shows that the optimal movement speed of the punch piston is 0.08 m/s. The forming process of the aluminum alloy cover was designed and the process was conducted on the novel quantitative feeding device of molten metal. The structure and process performance of the forming parts were summarized and the defects were analyzed. The influence of technological parameters such as pouring temperature, filling speed, initial mold temperature, and feeding distance on the quality of forming parts was studied, which resulted in the optimum process parameters for the dosing device.
Air-Bubble Induced Mixing: A Fluidic Mixer Chip
Authors: Jia Xiaoyu , Che Bingchen , Jing Guangyin , Zhang Ce
Published: February 2020

In this study, we report the design and fabrication of a novel fluidic mixer. As proof-of-concept, the laminar flow in the main channel is firstly filled with small air-bubbles, which act as active stirrers inducing chaotic convective turbulent flow, and thus enhance the solutes mixing even at a low input flow rate. To further increase mixing efficiency, a design of neck constriction is included, which changes the relative positions of the inclusion bubbles significantly. The redistribution of liquid volume among bubbles then causes complex flow profile, which further enhances mixing. This work demonstrates a unique approach of utilizing air bubbles to facilitate mixing in bulk solution, which can find the potential applications in microfluidics, fast medical analysis, and biochemical synthesis.
Lab-on-Chip Platform for Culturing and Dynamic Evaluation of Cells Development
Authors: Podwin Agnieszka , Lizanets Danylo , Przystupski Dawid , Kubicki Wojciech , Śniadek Patrycja , Kulbacka Julita , Wymysłowski Artur , Walczak Rafał , Dziuban Jan A.
Published: February 2020

This paper presents a full-featured microfluidic platform ensuring long-term culturing and behavioral analysis of the radically different biological micro-objects. The platform uses all-glass lab-chips and MEMS-based components providing dedicated micro-aquatic habitats for the cells, as well as their intentional disturbances on-chip. Specially developed software was implemented to characterize the micro-objects metrologically in terms of population growth and cells’ size, shape, or migration activity. To date, the platform has been successfully applied for the culturing of freshwater microorganisms, fungi, cancer cells, and animal oocytes, showing their notable population growth, high mobility, and taxis mechanisms. For instance, circa 100% expansion of porcine oocytes cells, as well as nearly five-fold increase in E. gracilis population, has been achieved. These results are a good base to conduct further research on the platform versatile applications.
Influence of Illumination on Porous Silicon Formed by Photo-Assisted Etching of p-Type Si with a Different Doping Level
Authors: Volovlikova Olga , Gavrilov Sergey , Lazarenko Petr
Published: February 2020

The influence of illumination intensity and p-type silicon doping level on the dissolution rate of Si and total current by photo-assisted etching was studied. The impact of etching duration, illumination intensity, and wafer doping level on the etching process was investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM), and Ultraviolet-Visible Spectroscopy (UV–Vis–NIR). The silicon dissolution rate was found to be directly proportional to the illumination intensity and inversely proportional to the wafer resistivity. High light intensity during etching treatment led to increased total current on the Si surface. It was shown that porous silicon of different thicknesses, pore diameters, and porosities can be effectively fabricated by photo-assisted etching on a Si surface without external bias or metals.
Advances in Liquid Metal-Enabled Flexible and Wearable Sensors
Authors: Ren Yi , Sun Xuyang , Liu Jing
Published: February 2020

Sensors are core elements to directly obtain information from surrounding objects for further detecting, judging and controlling purposes. With the rapid development of soft electronics, flexible sensors have made considerable progress, and can better fit the objects to detect and, thus respond to changes more sensitively. Recently, as a newly emerging electronic ink, liquid metal is being increasingly investigated to realize various electronic elements, especially soft ones. Compared to conventional soft sensors, the introduction of liquid metal shows rather unique advantages. Due to excellent flexibility and conductivity, liquid-metal soft sensors present high enhancement in sensitivity and precision, thus producing many profound applications. So far, a series of flexible and wearable sensors based on liquid metal have been designed and tested. Their applications have also witnessed a growing exploration in biomedical areas, including health-monitoring, electronic skin, wearable devices and intelligent robots etc. This article presents a systematic review of the typical progress of liquid metal-enabled soft sensors, including material innovations, fabrication strategies, fundamental principles, representative application examples, and so on. The perspectives of liquid-metal soft sensors is finally interpreted to conclude the future challenges and opportunities.
Review on Microbubbles and Microdroplets Flowing through Microfluidic Geometrical Elements
Authors: Cerdeira Ana T. S. , Campos João B. L. M. , Miranda João M. , Araújo José D. P.
Published: February 2020

Two-phase flows are found in several industrial systems/applications, including boilers and condensers, which are used in power generation or refrigeration, steam generators, oil/gas extraction wells and refineries, flame stabilizers, safety valves, among many others. The structure of these flows is complex, and it is largely governed by the extent of interphase interactions. In the last two decades, due to a large development of microfabrication technologies, many microstructured devices involving several elements (constrictions, contractions, expansions, obstacles, or T-junctions) have been designed and manufactured. The pursuit for innovation in two-phase flows in these elements require an understanding and control of the behaviour of bubble/droplet flow. The need to systematize the most relevant studies that involve these issues constitutes the motivation for this review. In the present work, literature addressing gas-liquid and liquid-liquid flows, with Newtonian and non-Newtonian fluids, and covering theoretical, experimental, and numerical approaches, is reviewed. Particular focus is given to the deformation, coalescence, and breakup mechanisms when bubbles and droplets pass through the aforementioned microfluidic elements.
On-chip MIC by Combining Concentration Gradient Generator and Flanged Chamber Arrays
Authors: Zhang Xiao-Yan , Li Zhe-Yu , Ueno Kose , Misawa Hiroaki , Ren Nan-Qi , Sun Kai
Published: February 2020

Minimum inhibition concentration (MIC) of antibiotic is an effective value to ascertain the agent and minimum dosage of inhibiting bacterial growth. However, current techniques to determine MIC are labor intensive and time-consuming, and require skilled operator and high initial concentration of bacteria. To simplify the operation and reduce the time of inhibition test, we developed a microfluidic system, containing a concentration generator and sub-micro-liter chambers, for rapid bacterial growth and inhibition test. To improve the mixing effect, a micropillar array in honeycomb-structure channels is designed, so the steady concentration gradient of amoxicillin can be generated. The flanged chambers are used to culture bacteria under the condition of continuous flow and the medium of chambers is refreshed constantly, which could supply the sufficient nutrient for bacteria growth and take away the metabolite. Based on the microfluidic platform, the bacterial growth with antibiotic inhibition on chip can be quantitatively measured and MIC can be obtained within six hours using low initial concentration of bacteria. Overall, this microfluidic platform has the potential to provide rapidness and effectiveness to screen bacteria and determine MIC of corresponding antibiotics in clinical therapies.
Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force
Authors: Ruan Zhihu , Ding Xukai , Qin Zhengcheng , Jia Jia , Li Hongsheng
Published: February 2020

An automatic mode-matching method for MEMS (Micro-electromechanical Systems) disk resonator gyroscopes (DRGs) based on virtual Coriolis force is presented in this paper. For this mode-matching method, the additional tuning electrodes are not required to be designed, which simplifies the structure design. By using the quadratic relationship between the driving voltage and the electrostatic force, the virtual Coriolis force is obtained by applying an AC voltage whose frequency is half of the driving mode resonant frequency to the sense electrode. The phase difference between the virtual Coriolis force and the sense output signal is used for mode-matching. The structural characteristics and electrode distribution of the DRG are briefly introduced. Moreover, the mode-matching theories of the DRG are studied in detail. The scheme of the mode-matching control system is proposed. Simultaneously, the feasibility and effectiveness of the mode-matching method are verified by system simulation. The experimental results show that under the control of mode-matching at room temperature, the bias instability is reduced from 30.7575 ° /h to 2.8331 ° /h, and the Angle Random Walk (ARW) decreases from 1.0208 ° / h to 0.0524 ° / h . Compared with the mode mismatch condition, the ARW is improved by 19.48 times.
Biocompatible Hydrotalcite Nanohybrids for Medical Functions
Authors: Jin Wenji , Lee Dongki , Jeon Yukwon , Park Dae-Hwan
Published: February 2020

Biocompatible hydrotalcite nanohybrids, i.e., layered double hydroxide (LDH) based nanohybrids have attracted significant attention for biomedical functions. Benefiting from good biocompatibility, tailored drug incorporation, high drug loading capacity, targeted cellular delivery and natural pH-responsive biodegradability, hydrotalcite nanohybrids have shown great potential in drug/gene delivery, cancer therapy and bio-imaging. This review aims to summarize recent progress of hydrotalcite nanohybrids, including the history of the hydrotalcite-like compounds for application in the medical field, synthesis, functionalization, physicochemical properties, cytotoxicity, cellular uptake mechanism, as well as their related applications in biomedicine. The potential and challenges will also be discussed for further development of LDHs both as drug delivery carriers and diagnostic agents.
Editorial for the Special Issue: “Physical Separation and Enrichment”
Authors: Farrokhpay Saeed
Published: February 2020

Physical separation methods have been used in mineral industry for centuries to separate valuable minerals from gangues using differences in their physical properties [...]
TLS and SfM Approach for Bulk Density Determination of Excavated Heterogeneous Raw Materials
Authors: Blistan Peter , Jacko Stanislav , Kovanič Ľudovít , Kondela Julián , Pukanská Katarína , Bartoš Karol
Published: February 2020

A frequently recurring problem in the extraction of mineral resources (especially heterogeneous mineral resources) is the rapid operative determination of the extracted quantity of raw material in a surface quarry. This paper deals with testing and analyzing the possibility of using unconventional methods such as digital close-range photogrammetry and terrestrial laser scanning in the process of determining the bulk density of raw material under in situ conditions. A model example of a heterogeneous deposit is the perlite deposit Lehôtka pod Brehmi (Slovakia). Classical laboratory methods for determining bulk density were used to verify the results of the in situ method of bulk density determination. Two large-scale samples (probes) with an approximate volume of 7 m3 and 9 m3 were realized in situ. 6 point samples (LITH) were taken for laboratory determination. By terrestrial laser scanning (TLS) measurement from 2 scanning stations, point clouds with approximately 163,000/143,000 points were obtained for each probe. For Structure-from-Motion (SfM) photogrammetry, 49/55 images were acquired for both probes, with final point clouds containing approximately 155,000/141,000 points. Subsequently, the bulk densities of the bulk samples were determined by the calculation from in situ measurements by TLS and SfM photogrammetry. Comparison of results of the field in situ measurements (1841 kg∙m−3) and laboratory measurements (1756 kg∙m−3) showed only a 4.5% difference in results between the two methods for determining the density of heterogeneous raw materials, confirming the accuracy of the used in situ methods. For the determination of the loosening coefficient, the material from both large-scale samples was transferred on a horizontal surface. Their volumes were determined by TLS. The loosening coefficient for the raw material of 1.38 was calculated from the resulting values.
Síndrome Parkinsoniana por Drogas
Authors: Andrade Luiz Augusto Franco de
Published: February 2020

Desde o inicio da utilização dos neurolépticos, introduzidos por Delay e Daniker no alvorecer da década de 50, os efeitos secundários motores do tipo parkinsoniano são fato bastante conhecido. A 'impregnação neuroléptica caracterizada poruma rigidez muscular plastica, bradicinesia, alterações posturais, fascias parkinsoniano e, às vezes, um tremorde repouso ou mesmo um tremor rápido, fino, das mãos, são acompanhantes constantes dos pacientes que recebem cronicamenteos medicamentos antipsicdticos. Com o passar do tempo novas drogasvem sendo introduzidas no a rsenalterapeutico não apenas psiquiátrico, corn ação semelhante de bloquear ou interferir na atividade dopamine rgica. As benzamidas substituidas, coma osulpiride, a metoclopramida e outros compostos, com indicações variadas na clinica médica, sea causa de sindrome parkinsoniana, talvez em manor monta queosneurolepticosclassicos.Maisrecentemente, acina rizina e, especialmente, a flunarizina,bloqueadores de canais de cálcio, muito utilizadas como antivertiginosos, antienxaquecosos ou como "vasoativadores*, tem sido causa de um sem número de casos de sindrome parkinsoniana e quadros de apatia, depressãopsiquica ou discinesia tardia. Entre mais de uma centena de pacientes com sindrome parkinsoniana desencadeada durante o tratamento com estas drogas, selecionamos 48 pacientes nos quais houve possibilidade de comprovação da relação de causa-efeito. Os detalhes clínicos, comparados troutrass indrom esparkinsonia nas secundarias a drogas, foram analisados em estudo separado. Chamamos a atengeo dos medicos para a importância do reconhecimento doquadro e o seu manejo.
A Novel Secure Video Steganography Technique using Temporal Lifted Wavelet Transform and Human Vision Properties
Authors: Thahab Ahmed
Published: February 2020

Steganography is a term that refers to the process of concealing secret data inside a cover media which can be audio, image and video. A new video steganography scheme in the wavelet domain is presented in this paper. Since the convolutional discrete wavelet transform produces float numbers, a lifted wavelet transform is used to conceal data. The method embeds secret data in the detail coefficients of each temporal array of the cover video at spatial localization using a unique embedding via YCbCr color space and complementing the secret data to minimize error in the stego video before embedding. Three secret keys are used in the scheme. Method’s performance matrices such as peak signal to noise ratio and Normalized Cross Correlation (NCC) expresses good imperceptibility for the stego-video. The value of Peak Signal to Noise Ratio (PSNR) is in range of 34-40dB, and high embedding capacity
Empirical Evaluation of Leveraging Named Entities for Arabic Sentiment Analysis
Authors: Mulki Hala , Haddad Hatem , Gridach Mourad , Babaoğlu Ismail
Published: February 2020

Social media reflects the attitudes of the public towards specific events. Events are often related to persons, locations or organizations, the so-called Named Entities (NEs). This can define NEs as sentiment-bearing components. In this paper, we dive beyond NEs recognition to the exploitation of sentiment-annotated NEs in Arabic sentiment analysis. Therefore, we develop an algorithm to detect the sentiment of NEs based on the majority of attitudes towards them. This enabled tagging NEs with proper tags and, thus, including them in a sentiment analysis framework of two models: supervised and lexicon-based. Both models were applied on datasets of multi-dialectal content. The results revealed that NEs have no considerable impact on the supervised model, while employing NEs in the lexicon-based model improved the classification performance and outperformed most of the baseline systems.
More-Than-Two-Parent Families
Authors: Andersson Catrine , Carlström Charlotta
Published: February 2020

Norms concerning family formation are generally based on ideals of coupled love and the two-parent-family, however, family practices frequently go beyond these norms. Families consisting of more than two parents that are co-parenting have only been studied to a small extent. Analysing Swedish newspaper and magazine articles on more-than-two-parent families between 1992 and 2016 we ask: How are more-than-two-parent families displayed in Swedish media stories? Are they portrayed as legitimate families, and if so, how is this legitimacy discursively constructed? What role does recognition play in the media stories and how is it negotiated in the narratives? We use the concepts display (Finch 2007) and recognition/redistribution (Fraser 1998; 2003) in exploring the significance that recognition and legitimacy have for the depiction of families with more than two parents in the media material. The display of more-than-two-parent families in the Swedish media stories analysed is generally characterised by repertoires of modern family life, of love and intimacy and responsible and successful parenting. These repertoires are used to display the families as normal, modern, and legitimate. In addition to the repertoires mentioned, there are repertoires of importance of geographical location, of strategies and of critique of current legislation that further emphasise the legitimacy of the more-than-two-parent families in contrast to an outdated legislation that forces these legitimate families to strategise their intimate relationships. Despite several of the people interviewed being described as polyamorous or gay/lesbian, there are no tendencies in the empirical material to motivate the need for rights based on an essentialised polyamorous identity; rather, the focus is on the fact that it is the practical care relations that need to be protected.
Trends in Contemporary Queer Kinship and Family Research
Authors: Dahl Ulrika , Gabb Jacqui
Published: February 2020

There have been great advances in socio-legal queer rights in recent years and many of these have clustered around partnership and parenthood. Whilst these rights are seemingly progressive and welcome, they have not come without a cost. Cultural studies and queer theorising have critically engaged with, and effectively critiqued, these advances. However, in many ways empirical research on “same-sex parenthood” has largely glossed over the problematic of contemporary equality rights and focussed instead on the opportunities presented. Research in this vein typically instantiates heteronormative gender and sexuality through insufficient attention to everyday experiences and the ways in which these queer kinship. Geopolitical and socio-cultural contexts are used as scene-setting rather than being operationalised to prise apart the intersections of public/private intimacies. A genealogy imperative is defining families, with queer practices of conception invoked to separate one family from the next. We may now be better able to understand how we relate to and engage with others and the social world around us, but homogeneity simultaneously occludes the specificity of experience. The clustering of sample-defined groups erases within group differences and obscures the structuring factors that underpin academic scholarship. In this piece, therefore, we ask: In these precarious and paradoxically permissive times, whose lives matter in same-sex parenthood research? To what extent have familial discourses shut down sex and sexuality debates in studies of queer kinship? What exactly, if anything, makes same-sex families queer?
A New Section of Anthurium: Section Cordato-punctatum (Araceae), Restricted to Central America
Authors: Croat Thomas B. , Carlsen Mónica M.
Published: February 2020

Molecular studies have recently shown that a predominantly Mexican clade of Anthurium Schott species with ovate-cordate to ovate-sagittate leaf blades with glandular punctations on the lower (abaxial) surface is distinct from all other groups of Anthurium. This new section, Cordato-punctatum Croat & Carlsen, is one of three sections of Anthurium essentially restricted to Central America, and it contains six taxa. In this article, we describe and typify this new section, characterize its morphology, compare it to other Central American clades, and provide a current species list with geographic distributions.
A Case Review Study of a Young Adult with Low-Functioning Autistic Disorder transitioning from School to Work
Authors: Wong Chong Lee
Published: February 2020

The transition process from school to work is often challenging for young people, especially those with disabilities. In order to gather a meaningful transition, a cross battery assessment and a functional vocational evaluation are needed. In this case review study, a young adult aged 20 years 8 months, JC, had his autistic condition reviewed. Assessment was done so as to know the current status of JC’s abilities and skills and his state of readiness for vocational employment. With the results, JC could then use them to look for vocational training centers so as to develop more skills in the area of his vocational interest.
Challenges of Teachers on Teaching Practice: A Case Study of Students of Freetown Teachers’ College in Sierra Leone
Authors: Kamara Alhaji Bakar
Published: February 2020

As the Ministry of Education, Science and Technology focuses on the agenda for free and quality education in all stages of teaching and learning in Sierra Leone, It is obvious that Teachers are at the center of all school activities. To ease the challenges of teachers in teaching, it is important to search for the problems of teachers on teaching practices. This study was conducted to find out some of the challenges that teachers on teaching practice experience in schools in Sierra Leone. The result will help to shed light on the aspect of the training exercise that needs to be improved to increase quality in schools. The study investigated the main challenges that teachers on teaching practice from Freetown Teachers College encounter in Social Studies and Business. Even though teaching practice teachers do their best to enrich students with their wealth of experiences, yet still, they got their obstacles that hinder their ability for effective teaching. The study employs qualitative procedures with a case study design where the main actor’s informant interview, observation focus group discussion and documentary review as the main methods of data collection. The respondents covered, 10 teaching practice teachers, 10 heads of schools, 9 college lecturers and 1 teaching practice coordinator of Freetown Teachers Polytechnic. The result revealed some problems in posting of student for teaching practice to various schools, payment of salaries to teaching practice teachers, school support, teaching methods, classroom environment, and language proficiency.
Differences in Ethnic/Racial Diversity of Texas Community College First-Time in College Full-Time Students Over Time: A Multiyear, Statewide Analysis
Authors: Lebron Juan Carlos , Slate John R , Lunenburg Frederick C
Published: February 2020

In this multiyear, statewide empirical investigation, the degree to which ethnic/racial diversity of first-time in college full-time Texas community college students changed from the 1999-2000 through the 2014-2015 academic years was determined.  Over this time period, the percentage of Hispanic first-time in college full-time Texas community college students showed a statistically significant increase, whereas the percentage of White first-time in college full-time students statistically significantly decreased.  No changes were noted with respect to either Black or Asian first-time in college full-time college students during this time period.  Although some improvement was noted in the ethnic-racial diversity of Texas first-time in college full-time students, more work remains.  Implications for policy and recommendations for research were provided.
Inter-projection Involved in between Buddhism and Psychology
Authors: Ching-chung Guey , Lin Hui-Wei
Published: February 2020

This paper proposes an interprojection model as a unified interface between psychology and Buddhism. The model aims to consolidate some essential concepts in Buddhism, as well as to extend and deepen the modern discipline of psychology. From the perspective of Buddhism, empirical methodology in psychology could be used to instruct about the deeper mysteries of Buddhism, help Buddhist philosophy become more objective and less metaphysical, thus offering an easier access to the general public. From the perspectives of psychology on the other hand, the precepts of Buddhism could help develop a deeper understanding of human experience, thus opening a path for psychology to explore the potential for personal transformation and finding existential meaning. This inter-projection model explains the mirror-like projection between human consciousness and external environment, from which we may obtain fresh insight from points of overlap between Buddhism and psychology. For one example, while Gestalt psychology explores relationships among various environmental stimuli at the given moment, Buddhist spiritual teachings seek to perpetuate the ultimate transcendence through increasing mindfulness on everything in the universe without time constraints. For another, according to Carl Rogers’ client-centered therapy, the therapist is, as suggested by Buddhism, required to foster his own skills on mindfulness other than demonstrating unconditional regard, genuineness, and empathetic understanding to clients, and eventually achieve self-transformation, and feel at ease in various adversities, like lotus growing from dirty muds.
Irak ve Batman Bitümleri Kullanılan SEBS Modifiyeli Bağlayıcıların Reolojik Özelliklerinin İncelenmesi
Authors: YALÇIN Erkut , BAYKARA Anıl , YILMAZ Mehmet , KÖK Baha Vural
Published: February 2020

Çalışmada, Kuzey Irak’ta bulunan LANAZ rafinerisinden ve Batman TÜPRAŞ rafinerisinden 2 farklı B 160/220 sınıfı saf bitüm temin edilmiştir. Bu bitümlere 3 farklı oranda (%2, %3 ve %4) stiren-etilen-bütadien-stiren (SEBS) ilave edilerek modifiye bitümler hazırlanmıştır. Saf ve modifiye bitümlere penetrasyon, yumuşama noktası, iki farklı sıcaklıkta (135 ve 165°C) dönel viskozite deneyleri uygulanmıştır. Ayrıca dinamik kayma reometresi (DSR) deneyleri ile tekerlek izi oluşumuna karşı dayanım parametreleri (G*/sin δ) belirlenmiştir. Farkı sıcaklık ve yükleme hızlarında DSR deneyi uygulanarak farklı koşullarda kompleks kayma modülü (G*) değerleri ile faz açıları belirlenmiştir. SEBS katkısı kullanılması ile bağlayıcıların penetrasyon ve faz açısı değerlerinin azaldığı, yumuşama noktası, viskozite, tekerlek izi parametresi, kompleks kayma modülü değerlerinin ise arttığı tespit edilmiştir. Yapılan analizler sonucunda yüksek sıcaklık dayanımı açısından Irak LANAZ rafinerisinden temin edilen bitümün Batman TÜPRAŞ rafinerisinden temin edilen saf bitüme göre daha olumlu sonuçlar verdiği belirlenmiştir. Modifiye bitümler değerlendirildiğinde Irak LANAZ bitümüne göre Batman TÜPRAŞ bitümü kullanılması durumunda daha etkili modifiye bitümler elde edildiği tespit edilmiştir.
Yeşil Çatı Sistemlerinin Bina Isıtma ve Soğutma Yüküne Etkisinin Farklı Bina Formları ve Derece Gün Bölgeleri İçin Analizi
Authors: GÜLTEN Ayça , KILIÇ TURAN Büşra
Published: February 2020

Bu çalışmada konutlarda yeşil çatı sistemlerinin bina ısıtma ve soğutma yüküne farklı derece gün bölgelerinde, üç farklı biçimde (kare, dikdörtgen ve L formda )tasarlanan konut örnekleri için etkisinin incelenmesi amaçlanmaktadır. Isıtma yükü için TS 825 hesap yöntemi soğutma yükü için ise Soğutma Yükü Sıcaklık Farkı Yöntemi (CLTD) kullanılmıştır. Ayrıca yeşil çatı bileşenlerinden yetiştirme ortamı derinliği 5 ile 50 cm arasında 5’er cm olacak biçimde arttırılarak bu katmanın, ısıtma ve soğutma yükü üzerindeki etkisi incelenmiştir. Böylelikle yeşil çatı sisteminin Antalya, Diyarbakır, Elazığ, Kayseri ve Erzurum illerinde tasarlanan örnek konutlar üzerinde, bina ısıtma ve soğutma yüküne etkisi belirlenen değişkenler doğrultusunda incelenerek ortaya çıkan farklılıklar analiz edilmiştir. Elde edilen bulgular, yeşil çatı sisteminin bina soğutma yüküne etkisinin, bina ısıtma yüküne etkisine göre daha fazla olduğunu ortaya koymaktadır. Yeşil çatı, bina ısıtma yüküne farklı derece gün bölgelerinde aynı oranda etki ederken, soğutma yükü üzerindeki etkisi, 1.derece gün bölgesinde, kare formlu, 50 cm yetiştirme ortamı kullanılan örnek binada en yüksek; 3. derece gün bölgesinde, L formlu, 5 cm yetiştirme ortamı kullanılan örnek binada ise en düşük derecede olmaktadır. Bu çalışmada konutlarda
yeşil çatı sistemlerinin bina ısıtma ve soğutma yüküne farklı derece gün
bölgelerinde, üç farklı biçimde (kare, dikdörtgen ve L formda )tasarlanan konut
örnekleri için etkisinin incelenmesi amaçlanmaktadır.  Isıtma yükü için TS 825 hesap yöntemi soğutma
yükü için ise Soğutma Yükü Sıcaklık Farkı Yöntemi (CLTD) kullanılmıştır. Ayrıca
yeşil çatı bileşenlerinden yetiştirme ortamı derinliği 5 ile 50 cm arasında 5’er
cm olacak biçimde arttırılarak bu katmanın, ısıtma ve soğutma yükü üzerindeki
etkisi incelenmiştir. Böylelikle yeşil çatı sisteminin Antalya, Diyarbakır,
Elazığ, Kayseri ve Erzurum illerinde tasarlanan örnek konutlar üzerinde, bina
ısıtma ve soğutma yüküne etkisi belirlenen değişkenler doğrultusunda
incelenerek ortaya çıkan farklılıklar analiz edilmiştir.  Elde edilen bulgular,  yeşil çatı sisteminin bina soğutma yüküne
etkisinin, bina ısıtma yüküne etkisine göre daha fazla olduğunu ortaya
koymaktadır. Yeşil çatı, bina ısıtma yüküne farklı derece gün bölgelerinde aynı
oranda etki ederken,  soğutma yükü
üzerindeki etkisi, 1.derece gün bölgesinde, kare formlu, 50 cm yetiştirme
ortamı kullanılan örnek binada en yüksek; 3. derece gün bölgesinde, L formlu, 5
cm yetiştirme ortamı kullanılan örnek binada ise en düşük derecede olmaktadır.