bluuebunny/crossref_metadata_2025_split huggingface dataset:
Half mode substrate integrated waveguide based leaky wave antenna with low cross polarisation
Authors: Belwal Pravesh , Agrawal Rahul , Gupta Suresh Chandra 
Published: May 2020

Abstract
A half mode substrate integrated waveguide (HMSIW) based leaky wave antenna (LWA) featuring low cross-polarization is proposed in this paper. The umbrella-shaped slot (the combination of longitudinal and transverse slots) is etched on the top layer of HMSIW LWA to get the efficient broadside radiation. The scanning range is obtained from −47° to +30° in a frequency range of 8.3 to 15.1 GHz. The cross-polarization level for the LWA is around −10 dB at broadside. In order to improve the cross-polarization levels in HMSIW LWA, two antennas are placed face to face obtaining the balanced symmetry across the longitudinal axis. Both the simulated and measured results show that the antenna is able to scan continuously from backward to forward direction with a very good low cross-polarization level. The developed prototype is capable of continuous beam scan from −29° to +32° in an operating frequency band of 9.2 to 15 GHz with a maximum gain of 13.5 dBi. The measured cross-polarization level is −30 dB which is quite low for the main beam at the broadside direction.
Multimode T-junctions based on truncated Eaton lens
Authors: Badri Seyed Hadi , Gilarlue Mohsen Mohammadzadeh 
Published: May 2020

Abstract
Mode-division multiplexing (MDM) in silicon-on-insulator platform is an emerging technology to increase the channel number of a single wavelength carrier by the number of modes and consequently increase the transmission capacity of on-chip optical interconnects. We propose and theoretically demonstrate a multimode branching structure based on the truncated Eaton lens. The proposed T-junctions efficiently convert the higher-order modes into fundamental modes; therefore, they can be potentially employed to manipulate modes in MDM systems. The designed T-junctions are implemented by varying the guiding layer’s thickness on a silicon-on-insulator platform. The three-dimensional simulations verify that the proposed structures can split the TE2 (TE1) mode into the fundamental modes with an average transmitted power of 32% (47%) in a 1550–1600 nm bandwidth.
Metamaterials – from fundamentals and MEMS tuning mechanisms to applications
Authors: Chang Yuhua , Wei Jingxuan , Lee Chengkuo 
Published: May 2020

Abstract
Metamaterials, consisting of subwavelength resonant structures, can be artificially engineered to yield desired response to electromagnetic waves. In contrast to the naturally existing materials whose properties are limited by their chemical compositions and structures, the optical response of metamaterials is controlled by the geometrics of resonant unit cells, called “meta-atoms”. Many exotic functionalities such as negative refractive index, cloaking, perfect absorber, have been realized in metamaterials. One recent technical advance in this field is the active metamaterial, in which the structure of metamaterials can be tuned to realize multiple states in a single device. Microelectromechanical systems (MEMS) technology, well-known for its ability of reconfiguring mechanical structures, complementary metal-oxide-semiconductor (CMOS) compatibility and low power consumption, is perfectly suitable for such purpose. In the past one decade, we have seen numerous exciting works endeavoring to incorporate the novel MEMS functionalities with metamaterials for widespread applications. In this review, we will first visit the fundamental theories of MEMS-based active metamaterials, such as the lumped circuit model, coupled-mode theory, and interference theory. Then, we summarize the recent applications of MEMS-based metamaterials in various research fields. Finally, we provide an outlook on the future research directions of MEMS-based metamaterials and their possible applications.
Hybrid silicon photonic devices with two-dimensional materials
Authors: Li Jiang , Liu Chaoyue , Chen Haitao , Guo Jingshu , Zhang Ming , Dai Daoxin 
Published: May 2020

Abstract
Silicon photonics is becoming more and more attractive in the applications of optical interconnections, optical computing, and optical sensing. Although various silicon photonic devices have been developed rapidly, it is still not easy to realize active photonic devices and circuits with silicon alone due to the intrinsic limitations of silicon. In recent years, two-dimensional (2D) materials have attracted extensive attentions due to their unique properties in electronics and photonics. 2D materials can be easily transferred onto silicon and thus provide a promising approach for realizing active photonic devices on silicon. In this paper, we give a review on recent progresses towards hybrid silicon photonics devices with 2D materials, including two parts. One is silicon-based photodetectors with 2D materials for the wavelength-bands from ultraviolet (UV) to mid-infrared (MIR). The other is silicon photonic switches/modulators with 2D materials, including high-speed electro-optical modulators, high-efficiency thermal-optical switches and low-threshold all-optical modulators, etc. These hybrid silicon photonic devices with 2D materials devices provide an alternative way for the realization of multifunctional silicon photonic integrated circuits in the future.
Woran orientieren sich Einschätzungen zur Zumutbarkeit einer Beschäftigung? Befunde aus einer Vignettenbefragung
Authors: Osiander Christopher , Senghaas Monika 
Published: May 2020

AbstractDieser Beitrag geht der Frage nach, unter welchen Bedingungen die Ablehnung von Stellenangeboten durch Empfänger/-innen von Arbeitslosengeld als (un-)zumutbar gilt. Wir untersuchen dies anhand einer Vignettenstudie, in deren Rahmen wir Teilnehmenden an einer Online-Befragung mehrere Beschreibungen fiktiver Arbeitsloser vorlegen, die Stellenangebote erhalten und ablehnen. Empirisch zeigt sich, dass Abschläge im Vergleich zum früheren Einkommen dazu führen, dass Befragte eine Stelle als weniger zumutbar einschätzen. Dasselbe gilt, wenn das Anforderungsniveau niedriger ist. Außerdem wird Älteren eher zugestanden, ein Stellenangebot abzulehnen als Jüngeren; umgekehrt ist es bei Personen, die bereits in der Vergangenheit arbeitslos waren. Die Zahl der verfügbaren Stellen und die Art der angebotenen Tätigkeit (Zeitarbeit, Befristung) beeinflussen das Urteil hingegen nicht.
RSU-1 Maintains Integrity ofCaenorhabditis elegansVulval Muscles by Regulating α-Actinin
Authors: Wang Xinyan , Huang Shuai , Zheng Cunni , Ge Wei , Wu Chuanyue , Tse Yu Chung 
Published: May 2020

AbstractEgg-laying behavior in Caenorhabditis elegans is a well-known model for investigating fundamental cellular processes. In egg-laying, muscle contraction is the relaxation of the vulval muscle to extrude eggs from the vulva. Unlike skeletal muscle, vulval muscle lacks visible striations of the sarcomere. Therefore, vulval muscle must counteract the mechanical stress, caused by egg extrusion and body movement, from inducing cell-shape distortion by maintaining its cytoskeletal integrity. However, the underlying mechanisms that regulate the cellular integrity in vulval muscles remain unclear. Here, we demonstrate that C. elegans egg-laying requires proper vulval muscle 1 (vm1), in which the actin bundle organization of vm1 muscles is regulated by Ras suppressor protein 1 (RSU-1). In the loss of RSU-1, as well as RasLET-60 overactivation, blister-like membrane protrusions and disorganized actin bundles were observed in the vm1 muscles. Moreover, RasLET-60 depletion diminished the defected actin-bundles in rsu-1 mutant. These results reveal the genetic interaction of RSU-1 and RasLET-60in vivo. In addition, our results further demonstrated that the fifth to seventh leucine-rich region of RSU-1 is required to promote actin-bundling protein, α-actinin, for actin bundle stabilization in the vm1 muscles. This expands our understanding of the molecular mechanisms of actin bundle organization in a specialized smooth muscle.
Selective Loss of Diversity in Doubled-Haploid Lines from European Maize Landraces
Authors: Zeitler Leo , Ross-Ibarra Jeffrey , Stetter Markus G 
Published: May 2020

AbstractMaize landraces are well adapted to their local environments and present valuable sources of genetic diversity for breeding and conservation. But the maintenance of open-pollinated landraces in ex-situ programs is challenging, as regeneration of seed can often lead to inbreeding depression and the loss of diversity due to genetic drift. Recent reports suggest that the production of doubled-haploid (DH) lines from landraces may serve as a convenient means to preserve genetic diversity in a homozygous form that is immediately useful for modern breeding. The production of doubled-haploid (DH) lines presents an extreme case of inbreeding which results in instantaneous homozygosity genome-wide. Here, we analyzed the effect of DH production on genetic diversity, using genome-wide SNP data from hundreds of individuals of five European landraces and their related DH lines. In contrast to previous findings, we observe a dramatic loss of diversity at both the haplotype level and that of individual SNPs. We identify thousands of SNPs that exhibit allele frequency differences larger than expected under models of neutral genetic drift and document losses of shared haplotypes. We find evidence consistent with selection at functional sites that are potentially involved in the diversity differences between landrace and DH populations. Although we were unable to uncover more details about the mode of selection, we conclude that landrace DH lines may be a valuable tool for the introduction of variation into maize breeding programs but come at the cost of decreased genetic diversity.
Evolutionary Rescue and Drug Resistance on Multicopy Plasmids
Authors: Santer Mario , Uecker Hildegard 
Published: May 2020

Abstract
Bacteria often carry “extra DNA” in the form of plasmids in addition to their chromosome. Many plasmids have a copy number greater than one such that the genes encoded on these plasmids are present in multiple copies per cell. This has evolutionary consequences by increasing the mutational target size, by prompting the (transitory) co-occurrence of mutant and wild-type alleles within the same cell, and by allowing for gene dosage effects. We develop and analyze a mathematical model for bacterial adaptation to harsh environmental change if adaptation is driven by beneficial alleles on multicopy plasmids. Successful adaptation depends on the availability of advantageous alleles and on their establishment probability. The establishment process involves the segregation of mutant and wild-type plasmids to the two daughter cells, allowing for the emergence of mutant homozygous cells over the course of several generations. To model this process, we use the theory of multitype branching processes, where a type is defined by the genetic composition of the cell. Both factors—the availability of advantageous alleles and their establishment probability—depend on the plasmid copy number, and they often do so antagonistically. We find that in the interplay of various effects, a lower or higher copy number may maximize the probability of evolutionary rescue. The decisive factor is the dominance relationship between mutant and wild-type plasmids and potential gene dosage effects. Results from a simple model of antibiotic degradation indicate that the optimal plasmid copy number may depend on the specific environment encountered by the population.
New specie of Neoparasitylenchus (Tylenchida, Allantonematidae), parasitizing Harmonia axyridis (Coleoptera, Coccinellidae) from Argentina
Authors: Camino Nora Beatriz , Reboredo Guillermo R. , González Sandra E. 
Published: May 2020

Presence of the genus Neoparasitylenchus Nickle, 1967 (Tylenchida, Allantonematidae), parasitizing Harmonia axyridis (Pallas, 1773) (Coleoptera, Coccinellidae) in Argentina. We describe a new species Neoparasitylenchus platense sp. n., which is characterized by having the free living stages lip region flatly rounded, spear slender, faintly knobbed, tail rounded, females with light brown body, stylet not sunken into body, and not prominent, subterminal vulva and anus, obtusely rounded tail end, with a peg-like projection, oviparous, and the males with a little stylet and partially degenerate oesophagus, spicules filiform with widened base, short gubernaculum, leptodera bursa.
________________________________________________________________Publicación registrada en Zoobank/ZooBank article registered:LSIDurn:lsid:zoobank.org:pub:FBE9DC98-04C4-4074-9037-1F5979320E2FActo nomenclatural/nomenclatural act:Neoparasitylenchus platense Camino, Reboredo & González, 2020LSIDurn:lsid:zoobank.org:act:B1146E52-46CC-40D0-B9FA-6627EA3B53E7________________________________________________________________
A Particular Form of “Urolithiasis” in a Toddler
Authors: Marzuillo Pierluigi , Capalbo Daniela , Guarino Stefano , Collura Giuseppe , Balassone Giuseppina , La Manna Angela , Miraglia del Giudice Emanuele 
Published: May 2020

Milk of calcium is a viscous colloidal suspension of calcium salts that forms in dilated cysts or cavities. We present, for the first time in literature, a toddler with isolated milk of calcium and treated with a conservative approach. A boy with a history of one urinary tract infection and recurrent fever without vesicoureteral reflux showed at the age of 14 months a left obstructive staghorn stone. Because of absent function of the left kidney at mercapto acetyl tri glycine scintigraphy, a JJ stent was positioned with a leak of whitish material immediately after the stent positioning. Renal scintigraphy performed 1 month later revealed a partial resumption in renal function (18%). When he was 18 months old, the child suffered episodes of acute pain with inconsolable crying, unresponsive to paracetamol administration. Ultrasound assessment revealed left pelvic dilation (anterior-posterior diameter of 18 mm), suspended echogenic debris in the bladder, and dilated left distal ureter with particulate matter. These episodes of acute pain were followed by expulsion of numerous soft formations and emission of greenish urine. Both urine culture at the admission and culture on the greenish urines were sterile. After the expulsion of the soft formations, pain episodes stopped. The diagnosis of milk of calcium stone was made. With this case, we highlight a condition that can be easily diagnosed (if known) because the morphology of the expelled material is pathognomonic. Diagnosing it could avoid unnecessary treatments (ie, extracorporeal shockwave lithotripsy) and support a conservative approach (ie, stent positioning).
Уявлення про професійне вигорання медичних працівників та дослідження його феноменології
Authors: Hromtseva Olena Vitaliivna 
Published: May 2020

Мета роботи – позначити концептуальні моделі професійного вигорання та розкрити їх прикладний характер для медичних працівників.
Результати дослідження. У дослідженні охарактеризована проблема професійного вигорання. Сформульовано концептуальну модель професійного вигорання, що поєднує його структурні та динамічні властивості. На підставі семантичного аналізу обґрунтовано зміст професійного вигорання.
Практичне значення дослідження. Результати дослідження можуть бути використані для опанування концептуальних моделей професійного вигорання, формування інструментів оцінювання професійних ризиків на ринку медичних послуг.
Оригінальність / цінність / наукова новизна дослідження – концептуалізація моделей професійного вигорання, їх структурування та дослідження змісту.
Перспективи подальших досліджень – розробка комплексного прикладного механізму виміру впливу професійного вигорання на діяльність медичних працівників, призначенням якого має стати розробка, проектування та здійснення заходів для покращення якості життя медичних працівників, умови їх праці та якості надання медичної допомоги.
Тип статті – теоретичний.
Evaluation of wind characteristics in Bac Lieu in 2016 using the weibull function
Authors: Thanh Pham Xuan , Anh Nguyen Xuan , Luu Le Van , Nguyen Hiep Van , Son Hoang Hai , Khuong Pham Le , Thuy Do Ngoc 
Published: May 2020

In this paper, the characteristics of wind speed at 20 m height at the Bac Lieu atmospheric physic station (Bac Lieu station) in 2016 were evaluated using the Weibull distribution function. The wind speed data set (every minute) from January 7th to December 31st, 2016 was used to calculate the two parameters of Weibull function including Weibull shape factor “k” and Weibull scale factor “c”. The results showed that at the Bac Lieu station in 2016, the values of k and c were 1.69 and 3.91, respectively. Some characteristics of wind speed were also estimated such as wind energy density (Pa/A=57.3 W/m2), wind speed of maximum energy carrier (Vmec=6.2 m/s), the most probable wind speed (Vmp=2.3 m/s), mean wind speed (Vmean­=3.5 m/s) and standard deviation of wind speeds (s = 2.1 m/s).
The results of deep magnetotelluric sounding for studying the Nha Trang - Tanh Linh fault
Authors: Son Vo Thanh , Minh Le Huy , Phuong Nguyen Hong , Marquis Guy , Thanh Nguyen Ha , Nam Vu Dao , Vinh Nguyen Ba , Quyen Dao Van , Thang Nguyen Chien , Viet Nguyen Hong 
Published: May 2020

The profile of deep magnetotelluric sounding (MT) from Duc Trong - Tuy Phong has been carried out in Lam Dong and Binh Thuan provinces. The length of the Duc Trong - Tuy Phong profile is about 80 km with 15 stations and the distance between the stations measures about 5 km. Two-dimensional MT inversion was used to find a resistivity model that fits the data. The 2D resistivity model allows determining position and development formation of the Nha Trang - Tanh Linh fault. This is the deep fault, which is showed by the boundaries of remarkable change of resistivity. In the near surface of the Earth (from ground to the depth of 6 km), the angle of inclination of this fault is about 60o; in the next part, the direction of the Nha Trang - Tanh Linh faut is vertical. Geoelectrical section of the Nha Trang - Tanh Linh profile shows that the resistivity of mid-crust is higher than that of lower-crust and of upper-crust.
Institute of Marine Geology and Geophysics - 30 years for studying geology and geophysics in the marine zones of Vietnam and Eastern Sea
Authors: Que Bui Cong 
Published: May 2020

Geological and geophysical investigation and study in the marine zones of Vietnam and Eastern Sea, its application in the mineral exploration, for natural disaster and hazard prevention, environment and resource protection, for sea and island management, marine economic development, sea defence and security is the important, main and long-term tasks of the Institute of Marine Geology and Geophysics. For last 30 years, the institute has a leading role for conducting a numerous projects of national and international programs of marine research and investigation in the marine zones of Vietnam and Eastern Sea. The obtained results and achievements include big, abundant, up to date databases, newest and detailed schemes and maps, valuable published papers, books, and contributions on characteristics of geophysical fields, deep crustal structure, seabed sediment and environment, geological structure and tectonic evolution, seismotectonics and earthquake, tsunami hazard assessment, mineral potential and perspective evaluation. Results of study on geophysical fields, deep crustal structure, seabed topography and geomorphology have been used for determination of outer limits of continental shelf of Vietnam in the Eastern Sea. Big part of the results was gained from research and investigation projects conducted in the Truong Sa and Hoang Sa areas. On the basis of the obtained achievements, some special tasks are proposed to continue conducting the geological and geophysical research and investigation in the sea of Vietnam and adjacent areas.
Studies on the variability of upwelling system in the South Central Vietnam waters under the impact of ENSO events and its impact on hydrographic conditions of the Ninh Thuan-Binh Thuan waters
Authors: Chung Tran Van , Long Bui Hong 
Published: May 2020

In this paper, we have exploited and analyzed data from HYCOM + NCODA Global 1/12.5o Reanalysis database in the period of 20 years from 1993 to 2012 and from 2013–8/2016 for the data assimilation of the HYCOM + NCODA Global 1/12° Reanalysis - for 22 depth layers in the East Sea area. The research results show that there are changes in the upwelling phenomenon and hydrological structure in the Ninh Thuan - Binh Thuan waters under the influence of ENSO phenomenon as follows: La Niña can degrade and eliminate the upwelling phenomenon. In the waters of Ninh Thuan - Binh Thuan when upwelling phenomenon occurs, it often manifests itself in the rapid decline of seawater temperature and rapid increase in seawater salinity in the depth layer of 50–100 m. The research results also show that in the East Sea region in 2010, during the Southwest monsoon season (July 2010), the phenomenon of downwelling occurred quite strongly in the middle of the Hoang Sa archipelago and the west of the Philippines and expanded toward southeast part of Hainan island. The cause of this special dynamic phenomenon may be due to the influence of the wind regime (average wind stress in July 2010).
Diversity of phytoplankton in lower Thu Bon river and Cu Lao Cham
Authors: Duyen Huynh Thi Ngoc , Luom Phan Tan , Van Tran Thi Le , Hue Tran Thi Minh , Lam Nguyen Ngoc , Hai Doan Nhu 
Published: May 2020

Data on characteristics of phytoplankton communities is important scientific information in marine ecosystem, especially in assessment of environmental impacts on biodiversity in a specific waters. In the present study, two-year phytoplankton data was analyzed for species diversity, community structure changes and variation in 4 adjacent waters: Lower Thu Bon river (TB), transition waters (CT), Cu Lao Cham island (CLC) and offshore site (BM) to provide basic scientific data of phytoplankton communities, compare and assess seasonal changes and possible linkage of these adjacent waters. A total of 364 phytoplankton taxa of 12 classes were identified, showing high diversity and with seasonal variation of the investigated waters. There was strong difference of phytoplankton communities among the adjacent waters with low similarity index and the change of dominant species seasonally in each area. The species richness and diversity in the lower Thu Bon river were lower than in other areas. Variation of phytoplankton abundance and diversity along the river transect showed changes in species composition between the dry and rainy seasons but with similar trend in abundance. The low community similarity between the adjacent waters and the transition waters may indicate low impacts of river flow on phytoplankton communities in the coastal waters.