bluuebunny/crossref_metadata_2025 huggingface dataset:
Hubungan ekspresi RANKL dengan derajat destruksi tulang akibat kolesteatoma pada otitis media supuratif kronik
Authors: Yarisman Lilia , Asroel Harry Agustaf , Aboet Askaroellah , Zaluchu Fotarisman
Published: September 2018

Latar belakang: Otitis media supuratif kronik (OMSK) dengan kolesteatoma merupakan penyakitpada telinga tengah dengan salah satu komplikasi berupa destruksi tulang, yang dapat menyebabkankematian. Receptor Activator of Nuclear Factor Kβ-Ligand (RANKL) merupakan salah satu sitokinyang berperan dalam proses destruksi tulang.Tujuan: Mengetahui hubungan ekspresi RANKL denganderajat destruksi tulang akibat kolesteatoma pada penderita OMSK tipe bahaya.Metode: Penelitian inibersifat analitik dengan desain cross sectional. Sebanyak 40 sampel kolesteatoma dilakukan pemeriksaanimunohistokimia untuk dinilai ekspresi RANKL pada kolesteatoma.Hasil: Terdapat hubungan yangsignifikan antara ekspresi RANKL dengan derajat destruksi tulang dan komplikasi yang terjadi (p<0,05).Tidak terdapat hubungan antara ekspresi RANKL dengan kelompok umur dan jenis kelamin (p>0,05).Kesimpulan: Terdapat hubungan yang signifikan antara derajat destruksi tulang dengan ekspresi RANKLmelalui pemeriksaan imunohistokimia.Kata kunci: RANKL, destruksi tulang, kolesteatoma, OMSK ABSTRACTBackground: Chronic suppurative otitis media (CSOM) with cholesteatoma is a middle ear disease,leading to bone structure destruction which can cause fatal case. Receptor Activator of Nuclear FactorKβ-Ligand (RANKL) is known as one of the cytokine that has important role in the process of bonedestruction.Purpose: To identify an association between RANKL expression with bone destruction leveldue to cholesteatoma in malignant CSOM patients. Method: This was an analytical study with crosssectional design. About 40 cholesteatoma sample was examinated by using immunohistochemistry tomeasure its RANKL expression. Result: There was a significant relationship (p<0.05) between RANKLexpression with bone destruction level and complication. There was no significant relationship betweenRANKL expression with age and sex (p>0.05). Conclusion: There was a significant relationship betweenbone destruction level with the RANKL expression by immunohistochemistry examination.Keywords: RANKL, bone destruction, cholesteatoma, CSOM
Pemeriksaan EBER sebagai identifikasi infeksi virus Epstein-Barr pada karsinoma nasofaring
Authors: Romdhoni Achmad Chusnu , Shoffi Muhammad Noer
Published: September 2018

Latar belakang: Protein Epstein-Barr Virus Encoded Small RNA (EBER) ditemukan pada sebagian besar jaringan karsinoma nasofaring (KNF). Hal ini merupakan bukti bahwa infeksi virus Epstein-Barr (VEB) menjadi salah satu penyebab terjadinya KNF. Penurunan ekspresi EBER dipengaruhi oleh maturasi sel dan diferensiasi sel karsinoma. Tujuan: Mengidentifikasi hubungan ekspresi EBER dengan stadium dan jenis histopatologi pada penderita KNF. Metode: Penelitian observasional analitik dengan pendekatan cross sectional. Penelitian dilakukan di Unit Rawat Jalan Telinga Hidung Tenggorok - Bedah Kepala Leher Rumah Sakit Umum Daerah Doktorr. Soetomo Surabaya mulai bulan November 2015 hingga Oktober 2016 dengan consecutive sampling. Fisher exact test untuk melihat hubungan ekspresi EBER dengan stadium KNF. Hasil: Ekspresi EBER dari seluruh sampel didapati negatif sebanyak 23,33%, positif lemah sebanyak 10%, positif sedang sebanyak 33,33%, dan positif kuat sebanyak sebanyak 33,33%. Berdasarkan hasil uji statistik menunjukkan hubungan antara ekspresi EBER dengan stadium KNF didapatkan p=0,623, sedangkan ekspresi EBER dengan jenis histopatologi KNF diketahui p=0,204. Kesimpulan: Tidak terdapat hubungan antara ekspresi EBER dengan stadium KNF, maupun antara ekspresi EBER dengan jenis histopatologi KNF. Kata kunci: Karsinoma nasofaring, ekspresi EBER, stadium dan jenis histopatologi ABSTRACT Background: Protein of Epstein Barr Virus Encoded Small RNA (EBER) have found in most of the nasopharyngeal carcinoma (NPC) tissue which prove that NPC was caused by Epstein Barr Virus Infection (EBV). EBER expression decreased was triggered by maturation and differentiation cell EBER expression in NPC patients. Purpose: To identify association between EBER expression and histopathological type of NPC. Method: This study was an observational analytic with cross-sectional design. This study occured at Inpatients Unit of Otorhinolaryngology - Head and Neck Surgery of Dr. Soetomo Hospital Surabaya, November 2015 - October 2016. Samples were collected by consecutive sampling. Statistical analysis was using Fisher’s exact test. Result: The EBER expression from all sample there were 23.33% negative, 10.00% weak positive, 33.33% moderate positive, and 33.33% strong positive. Statistical analysis was obtained p=0.623 and the association between EBER expression with stage of NPC was obtained p=0.204. Conclusion: There was no association between EBER expression and stage NPC, nor histopathological type of nasopharyngeal carcinoma. Keywords: Nasopharyngeal carcinoma, EBER expression, stage and histopathological type
Patogenesis dan diagnosis gangguan napas saat tidur dengan Drug Induce Sleep Endoscopy (DISE)
Authors: Rachmawati Elvie Zulka Kautzia , Arief Wresty , Tamin Susyana , Yunizaf Rahmanofa , Fardizza Fauziah
Published: September 2018

Latar belakang: Obstructive sleep apnea (OSA) ialah penyakit kronis yang terjadi akibat episode intermiten sumbatan jalan napas komplit atau sebagian saat tidur. OSA dapat menimbulkan komplikasi seperti hipertensi, diabetes melitus, stroke dan excessive daytime sleepiness yang dapat berakibat fatal. OSA merupakan bagian dari gangguan napas saat tidur. Tujuan: Mengindentifikasi letak atau level dan konfigurasi sumbatan pada saat tidur. Tinjauan pustaka: Cara untuk mendiagnosis OSA adalah nasofaringolaringoskopi dengan Muller`s maneuver, pemeriksaan polisomnography (PSG), dan drug induce sleep endoscopy (DISE). Pemeriksaan PSG merupakan standar baku emas untuk mendapakan nilai apnea-hipopnea index (AHI) yang menentukan derajat OSA. Pemeriksaan untuk mengidentifikasi lokasi sumbatan jalan napas yang menyebabkan peningkatan resistensi aliran udara adalah Muller`s maneuver dan DISE. Pada pemeriksaan DISE, digunakan propofol atau midazolam secara intravena untuk menstimulasi keadaan sumbatan pada saat tidur, dilanjutkan dengan pemeriksaan nasofaringolaringoskopi. Kesimpulan: Pemeriksaan ini merupakan cara yang sangat terpercaya untuk menentukan level sumbatan pada keadaan tidur, sehingga jenis tindakan operasi yang dilakukan menjadi lebih tepat. Kata kunci: Drug induced sleep endoscopy, midazolam, propofol, manuver Muller’s, obstructive sleep apnea, polisomnografi  ABSTRACT Background: Obstructive sleep apnea (OSA) is a common chronic disorder caused by intermittent episodes of complete or partial upper airway obstruction during sleep. It may lead to complications such as hypertension, diabetes mellitus, stroke, as well as excessive daytime sleepiness which can be fatal. OSA is a part of sleep disorder breathing. Purpose: To identify the sites or the levels of obstruction and its configuration. Literature review: Muller’s maneuver upon nasopharyngoscopy, polysomnography (PSG), and drug-induced sleep endoscopy (DISE) are the modalities for diagnosing OSA. Polysomnography is the gold standard examination for OSA, one of the variables; the apnea-hipopnea index (AHI) is used to determine the presence and severity of OSA. Muller’s maneuver and DISE are the examination to identify the sites responsible for increase in airflow resistance. DISE technique uses intravena injection of propofol or midazolam to produce obstruction in a “natural sleep” condition followed by nasopharyngolaryngoscopy examination. Conclusion: DISE is considered as a very reliable means to define the level of obstruction during sleeping, thus could help to determine appropriate surgery. Keywords: Drug induced sleep endoscopy, midazolam, propofol, Muller’s maneuver, obstructive sleep apnea, polisomnography
Charles Deering (c. 1690–1749): author of an early flora of Nottingham
Authors: Edmondson John
Published: October 2018

George Charles Deering, born Georg Karl Dering (or perhaps Döring) in Dresden about 1690, practised as a physician in Nottingham from 1735 until his death in 1749. He was the author of an early flora covering the environs of Nottingham (1738) utilizing John Ray's nomenclature, and a posthumously published historical account of Nottingham (1751). He studied in Leiden under Herman Boerhaave and in Paris with the Jussieu brothers, and had close connections with Johann Jacob Dillenius and John Martyn the elder. Notable features of his flora are discussed, including the people with whom he worked, his first records of plants in England, and his early mention of phenology.
L'asymétrie de l'ion cuivre bivalent dans des combinaisons du « type NaCl » et du « type Spinelle ». I. Études des systèmes MO-CuO
Authors: Delorme Claude
Published: October 2018

Parmi les solutions solides de type MO-CuO (M : Ni, Co, Mg) certaines telles que : 3 CoO, CuO et NiO, CuO sont particulièrement intéressantes, elles donnent lieu à l'apparition de surstructures quadratiques (c/a inférieur ou supérieur à l'unité). L'existence de ces surstructures, peu stables, est étudiée en fonction de la composition et des traitements thermiques. Les déformations du réseau cubique (type NaCl) ainsi observées sont dues à l'asymétrie de l'ion cuivre bivalent en présence d'un métal de transition (nickel ou cobalt). Dans une seconde partie nous poursuivrons cette étude des déformations quadratiques dues à l'asymétrie de l'ion cuivre dans des réseaux de type spinelle.
Design and synthesis ofC3-symmetric molecules bearing propellane moieties via cyclotrimerization and a ring-closing metathesis sequence
Authors: Kotha Sambasivarao , Todeti Saidulu , Aswar Vikas R
Published: October 2018

We have developed an efficient synthetic strategy to assembleC3-symmetric molecules containing propellane moieties as end groups and a benzene ring as a central core. The synthesis of theseC3-symmetric molecules involves simple starting materials. Our approach toC3-symmetric compounds relies on a Diels–Alder reaction, cyclotrimerization and ring-closing metathesis as key steps.
ENERGIJOS ŠALTINIŲ PARINKIMO ĮTAKA PASTATO ENERGINIAM NAUDINGUMUI / IMPACT OF ENERGY SOURCES SELECTION FOR ENERGY PERFOMANCE OF BUILDING
Authors: Mikučionienė Rūta , Žėkas Vygantas
Published: October 2018

The article analyzes energy supply alternatives for administrative nearly zero energy building in Kaunas. Alternative energy production systems such as biofuel boiler, condensing boiler, heat pumps (air-water and groundwater), solar photovoltaic, solar collectors and combinations of these systems are analysed. The simulation of analysed building energy demands has been made using DesignBuilder modelling software and modelling of energy production alternatives has been performed using energyPRO software. In order to determine the optimal energy production alternative, the combinations of technologies are compared by energetic and ecological indicators and influence of each combination on the energy performance class is assessed.

Santrauka

Vis griežtėjantys Europos Sąjungos reikalavimai pastatų sektoriuje reikalauja efektyvesnių ir ekologiškesnių
sprendimų aprūpinant pastatus energija, todėl būtina ieškoti geriausių aprūpinimo energija variantų juos įvertinant keliais kriterijais. Tiriamos administracinio beveik nulinės energijos pastato šios aprūpinimo energija technologijos: biokuro katilas, kondensacinis dujų katilas, šilumos siurbliai (gruntas–vanduo ir oras–vanduo), šalčio mašina, centralizuoti šilumos tinklai, saulės elementai ir saulės kolektoriai. Pastato poreikiai modeliuojami DesignBuilder, o aprūpinimo energija technologijų deriniai modeliuojami energyPRO modeliavimo programa. Siekiant nustatyti optimalų aprūpinimo energija variantą, technologijų deriniai yra lyginami pagal energinį ir ekologinį rodiklius ir įvertinama kiekvieno derinio įtaka pastato energinio naudingumo klasei.
RESEARCH OF WASTEWATER TERTIARY TREATMENT / TRETINIO NUOTEKŲ VALYMO TYRIMAI
Authors: Tabatadze Nino , Vaiškūnaitė Rasa , Mažeikienė Aušra
Published: October 2018

Small individual household wastewater treatment plants not always operate well. Consequently, the concentrations of ammonium nitrogen and phosphate phosphorus are exceeded. The aim of the work was to found the most effective material for wastewater tertiary treatment and propose environmentally friendly ways to solve fresh water problem. Three filter fillings (foam-glass, zeolite and biochar) were tested. As a result, we have got a following conclusion, foam-glass removed phosphate phosphorus most effectively (efficacy – 14−91%) and against ammonium nitrogen, comparatively effective was zeolite (efficacy – 29−100%).

Santrauka

Individualaus buitinių nuotekų valymo įrenginiai ne visada dirba efektyviai. Dėl to fiksuojami nitratų azoto, amonio azoto, bendrojo azoto, bendrojo fosforo ir fosfatų fosforo koncentracijų išvalytose nuotekose viršijimai. Darbo tikslas surasti efektyvias medžiagas tretiniam nuotekų valymui ir pasiūlyti šiai problemai spręsti aplinkai draugiškas technologijas, kad išvalytos nuotekos nepakenktų aplinkos kokybei. Buvo tirti trys filtro užpildai (pustiklis, ceolitas, bioanglis). Gauti rezultatai ir išvados, kad pustiklis efektyviau (efektyvumas – 14−91%) šalina iš nuotekų fosfatų fosforą, o ceolitas – amonio azotą (efektyvumas – 29−100 %).
TRANSPORTO EISMO ZONŲ DANGOS KONSTRUKCIJOS NESURIŠTOJO PAGRINDO SLUOKSNIO PRALAIDUMĄ VANDENIUI LEMIANČIŲ VEIKSNIŲ ĮVERTINIMAS / ASSESSMENT OF FACTORS DETERMINING WATER PERMEABILITY OF BASE LAYERS IN PAVEMENT STRUCTURE ON TRAFFIC ZONES
Authors: Filotenkovas Vilius , Vaitkus Audrius
Published: October 2018

This article analyses the influence of properties of frost-susceptible layers on water permeability functionality. It is necessary to ensure adequate water permeability of the structural layers and control of groundwater level to prevent or at least reduce the deformation of the road surface. Particularly important factors for proper water permeability are: the particle size distribution, composition of the mineral aggregates mixtures or used soil, their contamination, the degree of saturation and the number of air voids in the layers, the density of the layers. The test for determination of the water permeability coefficient is based on the Darcy law, which states that water permeability (also known as hydraulic permeability) is equal to the pressure variation over a body of a certain length. In geotechnical engineering, the water permeability of the mineral aggregates or soils is determined using a constant headwater permeability apparatus. It is necessary to take into account the fraction of the test object and perform the test at different hydraulic ramps to assess the suitability of the results. An experimental laboratory test plan was developed.

Santrauka

Šiame straipsnyje analizuojama šalčiui nejautrių, atsparių sluoksnių bei žemės sankasos gruntų savybių įtaka pralaidumo vandeniui funkcionalumui. Siekiant išvengti ar bent sumažinti dangos paviršiaus deformacijas, būtina užtikrinti pakankamą konstrukcijos sluoksnių pralaidumą vandeniui ir gruntinio vandens lygio kontrolę. Itin svarbūs rodikliai tinkamam vandens pralaidumui yra naudojamų mineralinių medžiagų mišinių ar gruntų granuliometrinė sudėtis, jų užterštumas, soties laipsnis ir oro tuštymių kiekis sluoksniuose, sluoksnių tankiai. Pralaidumo vandeniui koeficiento nustatymo bandymas remiasi Darsi (angl. Darcy) dėsniu, kuris teigia, jog pralaidumas vandeniui (taip pat žinomas kaip hidraulinis pralaidumas) yra lygus slėgių pokyčiui per tam tikro ilgio kūną. Tradiciškai geotechninėje inžinerijoje gruntų ir mineralinių medžiagų įsotintos medžiagos pralaidumas vandeniui nustatomas naudojant pastovaus spūdžio pralaidumo vandeniui koeficiento nustatymo įrangą. Bandymo metu nustatomas pratekėjusio vandens kiekis per tam tikrą laiko tarpą. Siekiant įvertinti rezultatų tinkamumą, būtina atsižvelgti į bandomojo objekto frakciją ir atlikti bandymą esant skirtingiems hidrauliniams nuolydžiams. Sudarytas eksperimentinio laboratorinio tyrimo planas.
BIURO PATALPOS ŠILUMOS PRITEKIŲ TYRIMAS / INVESTIGATION OF HEAT GAINS IN AN OFFICE
Authors: Juršėnaitė Laura , Motuzienė Violeta
Published: October 2018

Increasing the energy efficiency of buildings, heat losses through envelope and infiltration become very low, therefore, the proportion of the heat gains in the heat balance of the building increases. Due to their abundance of computer equipment, intensive lighting and the abundance of employees the information technologies’ (IT) staff offices are characterized by high internal heat gains. Formally, such offices are not distinguished when designing the building and its energy performance, values of internal heat gains are the same as for usual offices. Insufficient attention to the detailed differentiation of the heat gains may lead to the inadequate assessment of the energy performance of the building, insufficient design power of the cooling system. The aim of this work is to determine the influence of internal heat gains on the heat balance of a existing IT office. The heat gains are initially determined experimentally and compared with the values calculated in accordance with STR 2.01.02:2016, the room model is calibrated in the IDA ICE software, which is used to analyze building’s annual energy demand sensitivity to internal heat gains. It was defined that in the case of maximum heat gains, the experimental internal heat gain are 63–81% higher than the ones, calculated in accordance with norms. The annual heating demand is 31% lower, and the cooling demand is 56% higher according to the experimental simulation compared to standardized simulation results.

Santrauka

Didinant pastatų energinį naudingumą, šilumos nuostoliai per atitvaras ir dėl infiltracijos tampa nykstamai maži, todėl pastato šilumos balanse didėja vidiniams šilumos pritekiams tenkanti dalis. Dideliais vidiniais šilumos pritekiais pasižymi informacinių technologijų (IT) personalo biurai dėl juose gausiai naudojamos kompiuterinės įrangos, intensyvaus apšvietimo bei darbuotojų gausos. Formaliai tokie biurai, projektuojant pastatą ir jo energinį naudingumą, nėra išskiriami, jiems taikomos tokios pačios vidinių pritekių vertės kaip ir įprastiems biurams. Nepakankamas dėmesys išsamesniam šilumos pritekių diferencijavimui gali lemti tai, kad pastato naudingumas bus įvertintas netinkamai, vėsinimo sistemos bus suprojektuotos nepakankamos galios (projektinei šildymo galiai šilumos pritekiai įtakos neturi). Šio darbo tikslas yra nustatyti vidinių šilumos pritekių įtaką realaus IT biuro patalpos šilumos balansui. Šilumos pritekiai pradžioje nustatomi eksperimentiniu būdu ir lyginami su dydžiais, apskaičiuotais pagal STR 2.01.02:2016 standartą, patalpos modelis kalibruojamas IDA ICE programoje, kurioje atliekama pastato metinių energijos poreikių priklausomybės nuo vidinių šilumos pritekių parametrinė analizė. Nustatyta, kad maksimalūs paros eksperimentiniai vidiniai pritekiai yra 63–81 % didesni nei apskaičiuoti pagal reglamentą, metiniai šildymo poreikiai pagal eksperimentinius duomenis yra 31 % mažesni, o vėsinimo poreikiai 56 % didesni lyginant su gautais taikant normines pritekių vertes.
Microlensing Path Parameterization for Earth-like Exoplanet Detection around Solar-mass Stars
Authors: de Almeida L. , do Nascimento J.-D.
Published: October 2018

We propose a new parameterization of the impact parameter u
0 and impact angle α for microlensing systems composed by an Earth-like exoplanet around a solar-mass star at 1 au. We present the caustic topology of such system, as well as the related light curves generated by using such a new parameterization. Based on the same density of points and accuracy of regular methods, we obtain results five times faster for discovering Earth-like exoplanets. In this big data revolution of photometric astronomy, our method will impact future missions like WFIRST (NASA) and Euclid (ESA) and their data pipelines, providing a rapid and deep detection of exoplanets for this specific class of microlensing event that might otherwise be lost.
A Survey of Changes in Magnetic Helicity Flux on the Photosphere During Relatively Low-class Flares
Authors: Bi Yi , Liu Ying D , Liu Yanxiao , Yang Jiayan , Xu Zhe , Ji Kaifan
Published: October 2018

Using the 135 s cadence of the photospheric vector data provided by the Helioseismic and Magnetic Imager telescope on board the Solar Dynamic Observatory, we examined the time evolution of magnetic helicity fluxes across the photosphere during 16 flares with the energy class lower than M5.0. During the flare, in four out of 16 events, we found impulsive changes in the helicity fluxes. This indicates that even the flare with less energy could be associated with anomalistic transportation of the magnetic helicity across the photosphere. Accompanying the impulsive helicity fluxes, the poynting fluxes across the photosphere evolved from positive to negative. As such, the transportations of magnetic energy across the photosphere were toward the solar interior during these flares. In each of the four events, the impulsive change in the helicity flux was always mainly contributed by an abrupt change in the horizontal velocity field on a sunspot located near the flaring polarity inversion line. The velocity field on each sunspot shows either an obvious vortex pattern or a shearing pattern relative to the magnetic polarity, which tended to relax the magnetic twist or shear in the corona. During these flares, an abrupt change in the Lorentz force acting on these sunspots was found. The rotational motions and shearing motions of these sunspots always had the same directions with the resultant Lorentz forces. These results support the view that the impulsive helicity transportation during the flare could be driven by the change in the Lorentz force applied on the photosphere.
Investigation of Energetic Particle Release Using Multi-point Imaging and In Situ Observations
Authors: Zhu Bei , Liu Ying D. , Kwon Ryun-Young , Wang Rui
Published: October 2018

The solar eruption on 2012 January 27 resulted in a wide-spread solar energetic particle event observed by STEREO A and the near-Earth spacecraft (separated by 108°). The event was accompanied by an X-class flare, extreme-ultraviolet (EUV) wave and fast coronal mass ejection. We investigate the particle release by comparing the release times of particles at the spacecraft and the times when magnetic connectivity between the source and the spacecraft was established. The EUV wave propagating to the magnetic footpoint of the spacecraft in the lower corona and the shock expanding to the open field line connecting the spacecraft in the upper corona are thought to be responsible for the particle release. We track the evolution of the EUV wave and model the propagation of the shock using EUV and white-light observations. No obvious evidence indicates that the EUV wave reached the magnetic footpoint of either STEREO A or L1-observers. Our shock modeling shows that the release time of the particles observed at L1 was consistent with the time when the shock first established contact with the magnetic field line connecting L1-observers. The release of the particles observed by STEREO A was delayed relative to the time when the shock was initially connected to STEREO A via the magnetic field line. We suggest that the particle acceleration efficiency of the portion of the shock connected to the spacecraft determines the release of energetic particles at the spacecraft.
A Study of the Strong Gravity Region of the Black Hole in GS 1354–645
Authors: Xu Yerong , Nampalliwar Sourabh , Abdikamalov Askar B. , Ayzenberg Dimitry , Bambi Cosimo , Dauser Thomas , García Javier A. , Jiang Jiachen
Published: October 2018

It is thought that the spacetime metric around astrophysical black holes is well described by the Kerr solution of Einstein’s gravity. However, robust observational evidence of the Kerr nature of these objects is still lacking. Here we fit the X-ray spectrum of the stellar-mass black hole in GS 1354–645 with a disk reflection model beyond Einstein’s gravity in order test the Kerr black hole hypothesis. We consider the Johannsen metric with the deformation parameters α
13 and α
22. The Kerr metric is recovered for

. For α
22 = 0, our measurements of the black hole spin and of the deformation parameter α
13 are

and −0.34 < α
13 < 0.16, respectively. For α
13 = 0, we find a
* >  0.975 and −0.09 < α
22 < 0.42. All the reported uncertainties are at 99% of confidence level for two relevant parameters.
Observing the Influence of Growing Black Holes on the Pre-reionization IGM
Authors: Vasiliev Evgenii O. , Sethi Shiv K. , Shchekinov Yuri A.
Published: October 2018

We consider the cosmological implications of the formation of the first stellar size black holes (BHs) in the universe. Such BHs form and grow by accretion in minihaloes of masses ≃105–107

, and emit nonthermal radiation that affects the ionization and thermal state of the intergalactic medium (IGM). We compute the implications of this process. We show that the influence regions for hydrogen increase to 10 kpc (physical length) for non-growing BHs to more than 0.3–1 Mpc for accreting BHs; the influence regions are ten times smaller for singly ionized helium. We consider three possible observables from the influence zones around accreting BHs during 8.5 < z < 25: the H i 21 cm line, the hyperfine line of 3He ii, and the H i recombination lines. We show that the 21 cm emitting region around a growing BH could produce brightness temperatures ≃15 mK across an evolving structure of 1 Mpc with hot, ionized gas closer to the BH and much cooler gas in outer regions. We show that current and upcoming radio interferometers such as the Low Frequency Array (LOFAR) and the Square Kilometre Array (SKA) SKA1-LOW might be able to detect these regions. The 3He ii emission from regions surrounding the growing BH is weak: the corresponding brightness temperatures reach tens of nano-Kelvin, which is below the range of the upcoming SKA1-MED. We show that for growing BHs, the Hα line could be detected by the James Webb Space Telescope with a signal-to-noise ratio of 10 in 104 s of integration. In light on the recent result of the Experiment to Detect the Global EoR Signature (EDGES), we show that with additional cooling of baryons owing to collision with dark matter, the H i signal could be enhanced by more than an order of magnitude.
Tosanoides annepatrice, a new basslet from deep coral reefs in Micronesia (Perciformes, Percoidei, Serranidae)
Authors: Pyle Richard L. , Greene Brian D. , Copus Joshua M. , Randall John E.
Published: October 2018

The new species Tosanoidesannepatricesp. n. is described from four specimens collected at depths of 115–148 m near Palau and Pohnpei in Micronesia. It differs from the other three species of this genus in life color and in certain morphological characters, such as body depth, snout length, anterior three dorsal-fin spine lengths, caudal-fin length, and other characters. There are also genetic differences from the other four species of Tosanoides (d ≈ 0.04–0.12 in mtDNA cytochrome oxidase I). This species is presently known only from Palau and Pohnpei within Micronesia, but it likely occurs elsewhere throughout the tropical western Pacific.
Du management bienveillant à la communauté de travail : le cas Yves Rocher
Authors: Glaisner Johan , Masclef Olivier
Published: September 2018

En 2018, Yves Rocher a été classée meilleur site de e-business par la FEVAD. Or l’entreprise a opté pour une GRH et un management différents des usages habituellement observés dans les activités de supply chain  : elle pratique la bienveillance généralisée dans son management et ses relations de travail. L’objectif de cet article est d’observer la réalité et la matérialisation de cette bienveillance. Au moyen d’une méthodologie enracinée, notre recherche nous a non seulement conduits à voir comment cette bienveillance se concrétisait dans les pratiques, mais encore à déceler un sous-bassement qui rend cette bienveillance opératoire : une dynamique communautaire.
De l’économie collaborative à « l’ubérisation » du travail : les plateformes numériques comme outils de gestion des ressources humaines
Authors: Galiere Sophia
Published: September 2018

Si l’économie collaborative a initialement suscité des espoirs d’une modalité alternative de travail voire de société (OuiShare, 2015), les plateformes numériques de travail de pair à pair se retrouvent aujourd’hui au cœur de controverses résumées par le néologisme « uberisation ». Leurs conséquences sociales déstabilisatrices ont fait l’objet d’abondantes recherches scientifiques, mais peu ont questionné la prétention des plateformes à remettre en cause les formes de management issues de l’entreprise traditionnelle. Les plateformes ont construit un mythe (Stemler, 2017) autour d’elles et se présentent comme de simples intermédiaires de marché ou des innovations techniques radicales, permettant aux prestataires de les approprier et de travailler avec selon leurs propres volontés. Notre recherche entend au contraire analyser les plateformes de travail de pair à pair sous l’angle des outils de gestion, pourvus du fait de leur matérialité d’un pouvoir structurant sur les comportements des prestataires. L’idée est de déconstruire le mythe construit par les plateformes en donnant à voir la variété des pratiques managériales qu’elles opèrent. À partir d’une méthodologie qualitative couplant analyses documentaires et entretiens semi-directifs avec des prestataires, nous élaborerons une typologie des diverses formes de management que les plateformes peuvent mobiliser. En distinguant plateformes « opératrices » et « places de marché », nous conceptualiserons les plateformes comme outils de gestion de ressources humaines prescrivant le travail et servant de support pour la fidélisation d’une communauté de travailleurs. Enfin, nous nuancerons l’innovation promise par les plateformes en donnant à voir des formes de continuités avec les tendances du management moderne à rechercher l’efficacité à partir d’arrangements dépersonnalisés.
Analysis of the Effects of two Gamified Emotional Education Software’s in Emotional and Well-being Variables in Spanish Children and Adolescents
Authors: Ros-Morente Agnès , Cabello Cuenca Enric , Filella Guiu Gemma
Published: September 2018

The aim of the present research is to explore the differences among emotional and well-being variables in primary and secondary education students after undergoing the software’s Happy 8-12 and the Happy 12-16 during an academic course. Both innovative software’s are focused in the training of the basic emotional competences. The study has a pre-post quasi-experimental design with a control group. A total of 574 primary education students and 903 of secondary education participated in the study. Results show that the training of the emotional competences with novel methods, such as gamified software’s, improves the emotional competences, reduces anxiety and enhances academic achievement in a sample of Spanish students.
An Integrated Model to Enhance Virtual Learning Environments with Current Social Networking Perspective
Authors: Laeeq Kashif , Memon Zulfiqar Ali
Published: September 2018

A Virtual Learning Environment (VLE) is an accumulation of incorporated soft-ware components, empowering the administration of web-based learning (online learning, e-learning). The quality of VLE is indispensable for the accomplishment of e-learning goals and responsible to engage students during web based learning. The attributes of existing VLES does not completely meet with the requirements of today’s e-learning. Consequently, decreases students’ interest, participation and engagement with web-based e-learning. In contrast, the learners’ engagement and participation are higher in social networking sites (SNS). For this reason, many researchers believe that the inclusion of features, similar to SNSs, in VLE may in-crease its effectivity. The goal of this research article is to investigate existing e-learning platform and make a room for SNSs and online tools for e-learning. The paper proposes an integrated model to enhance existing e-learning environment by incorporating the strength of SNSs and other potential tools with VLEs. This re-search article will provide a good direction and new thoughts for the researchers of technology supported learning-domain.
A Thai Junior High School Students’ 21st Century Information Literacy, Media Literacy, and ICT Literacy Skills Factor Analysis
Authors: Moto Sangutai , Ratanaolarn Thanin , Tuntiwongwanich Somkiat , Pimdee Paitoon
Published: September 2018

As Thailand moves through the 21st Century, the education system and resultant labour force must be prepared for the rapid changes in Thailand’s society, culture, politics, economy, and technologies. Previously, the 21st century framework has identified crucial elements to their future success as information literacy, media literacy, and information and communication technology (ICT) literacy skills. Given this priority, by use of multistage clustering sampling, 600 Thai junior high school students were selected, from which a five-level, 73-item Likert type agreement scale questionnaire was used to collect data from October 2017 to December 2017. The analysis of the student’s skills in information literacy, media literacy, and ICT literacy was conducted with the use of SPSS Version 24 and mean (¯(x )), standard deviation (S.D.), the Kaiser-Meyer-Olkin (KMO) test, and Bartlett's test of sphericity for analysis. Furthermore, a second-order confirmatory factor analysis was undertaken in which AMOS Version 24 software was used. Based on the second order CFA, it was found that the Information, Media and Technology Skills (IMTS) model was composed of three components that corresponded to the empirical data, with the most important element being ICT literacy, followed by media literacy, and finally, information literacy.
Automated Adaptive Mobile Learning System using Shortest Path Algorithm and Learning Style
Authors: Alkore Alshalabi Ibrahim , Hamada Samir E , Elleithy Khaled , Badara Ioana , Moslehpour Saeid
Published: September 2018

A directed graph represents an accurate picture of course descriptions for online courses through computer-based implementation of various educational systems. E-learning and m-learning systems are modeled as a weighted, directed graph where each node represents a course unit. The Learning Path Graph (LPG) represents and describes the structure of domain knowledge, including the learning goals, and all other available learning paths. In this paper, we propose a system prototype that implements a propose adaptive learning path algorithms that uses the student’s information from their profile and their learning style in order to improve the students’ learning performances through an m-learning system that provides a suitable course content sequence in a personalized manner.
Factors that Predict Attitudinal Grouping towards SMS Advertising
Authors: Humbani Michael , Jordaan Yolanda
Published: September 2018

This study focuses on factors that predict consumer attitudes towards short message service (SMS) advertising. The purpose of the study is to build a predictive framework that can be employed to identify which factors of SMS advertising contribute to different attitudinal groups. This study is based on the push and pull motivation theory which, in this context, explains and predicts consumer responses to SMS advertisements. The results of the discriminant analysis indicate that three factors of SMS advertising are responsible for group separation, namely perceived SMS infotainment, perceived knowledge and fear of spamming. The discriminant model enables practitioners to predict the category to which consumers belong based on their responses to the factors of SMS advertising, and allows media practitioners to use SMS advertising more effectively.
A Smart Mobile Pregnancy Management and Awareness System for Saudi Arabia
Authors: Alotaibi Mohammed , Albalawi Maram , Alwakeel Layan
Published: September 2018

Over the years, physicians and other medical personnel have lamented the ever-increasing prevalence of physical inactivity and low awareness amongst pregnant women all over the world and especially in Saudi Arabia. The physicians argue that pregnant women are continuously placing their lives at risk by ignoring physical activity and low awareness. Similarly, the pregnant women who rarely participate in physical activity and awareness programs are accredited with risking the lives of their babies. As a result, professional medics have been trying to come up with innovative strategies that can promote physical activity and improve health awareness amongst the pregnant women for a long time. In recent years, the world has experienced a massive shift towards technology-based solutions for nearly every aspect of life.
In the health industry, mHealth has become a key trend as tech companies liaise with medical practitioners in pursuit of technological solutions to diverse health concerns. With this understanding, the current paper provides a vivid analysis of a newly-developed technological system designed to facilitating communication between pregnant women and healthcare providers, increase interactions amongst pregnant women, as well as motivate them to increase their participation in physical activities and remote monitoring of their babies. Unlike most mHealth initiatives that provide specific functionalities, the current system is an all-inclusive system offering a combination of all functionalities available through individual pregnancy monitoring systems. The newly-developed system aims to empower pregnant with enough awareness of pregnancy and also to do more physical activity using advanced technology of internet of things and mobile health technology specially in remote areas.
Immobilization of Captive Wapiti Cervus canadensis with Azaperone and Xylazine
Authors: Stewart Jamie L. , Strahl-Heldreth Danielle E. , Shipley Clifford F.
Published: October 2018

Xylazine, an α2-adrenoreceptor agonist, is commonly used in combination with other drugs for safe and effective immobilization of North American wapiti Cervus canadensis. Azaperone is a neuroleptic sedative that reduces the stress of immobilization and handling, but there are no reports of its efficacy when combined with xylazine for use in wapiti. Our objective was to test the efficacy of a combination of xylazine and azaperone to remotely immobilize captive wapiti for performing routine procedures. We administered drugs intramuscularly using a CO2-powered projector with commercially made darts. We successfully immobilized 11 of 12 wapiti with one remote injection containing estimated doses of 1.3 ± 0.05 mg/kg xylazine and 0.2 ± 0.03 mg/kg azaperone (mean ± SD), and immobilized animals were recumbent at 2–12 min after injection (mean: 6 min 40 s). We administered tolazoline as a reversal for xylazine at an estimated dose of 3.0 ± 0.6 mg/kg intramuscularly, and all wapiti were standing within 14 min of reversal administration. In a subset of three wapiti, a moderate hypoxemia occurred immediately after immobilization but resolved by 60 min, before xylazine reversal. The combination of xylazine and azaperone resulted in smooth and safe immobilization for performing routine processing in captive North American wapiti. Further studies are needed to determine whether this combination and dose of drugs would be sufficient for immobilization of free-ranging wapiti.
Documentação metodológica de um grupo focal virtual sobre hackers e ciberpiratas
Authors: Mello Matheus Guimarães , Cruz Leonardo Ribeiro da
Published: October 2018

A partir de uma pesquisa-experimento acerca de representações sociais sobre hackers e ciberpiratas, apresentamos neste artigo uma discussão metodológica sobre a relevância e as potencialidades da pesquisa qualitativa virtual, tratando especificamente da técnica do grupo focal virtual. Nosso objetivo é suscitar o interesse pelas metodologias de pesquisa virtual, um campo que oferece muitas possibilidades viáveis, enriquecendo ainda mais a diversidade de abordagens da pesquisa qualitativa. Também incluímos uma breve interpretação da pesquisa empírica, problematizando normatizações legais (vigentes ou em discussão) sobre condutas no ciberespaço (enfocando os direitos de acesso e compartilhamento de informações) para avaliar se são justificadas como ilícitas ou não por usuários frequentes de Internet.
Highly-Dispersed Wollastonite-Based Additive and its Effect on Fine Concrete Strength
Authors: Lukutsova N.P. , Karpikov E.G. , Golovin S.N.
Published: October 2018

The effective highly-dispersed additive on the basis of the natural mineral wollastonite has been developed and studied. It enables obtaining fine concrete with the bending strength of up to 21.6 MPa and the strength of compression of up to 55 MPa, and the content of 0.5% (in terms of dry matter). The additive is a suspension of wollastonite after mechanical, and then ultrasonic processing in the aquatic environment of the anionic stabilizer of naphthalene-formaldehyde type. Due to the laser granulometry it has been ascertained that grinding wollastonite together with the anionic stabilizer leads to a change in the specific surface from 20 400 to 32 600 cm2/cm3 and to forming the particles with a modal diameter of 10.31 μm. After ultrasonic processing in the aquatic stabilizer environment the wollastonite particle size reduces to 0.4 μm. The positive heat and humidity effect on the structure and strength of the concrete with highly-dispersed wollastonite-based additive under the mode 3+4+3 h at the isothermal hardening temperature of 80оС is shown. The application of the developed additive in the fine concrete composition makes it possible to save up to 15% of cement due to the strength increase.
Effect of Abrasive Tools in Galvanomechanical Treatment on the Roughness of the Deposited Chromium Layer
Authors: Zherebtcov D.A. , Gruba Oksana N. , Smolyakova K.R.
Published: October 2018

The article deals with the method of obtaining a hard chromium coating on details of the "body of rotation" type with the use of an abrasive tool. The influence of the composition and hardness of the elastic abrasive tool on the results of galvanomechanical chromium plating of rotating cylindrical parts has been studied. Binder compositions for an abrasive tool used to improve the roughness of the deposited chromium layer have been developed. A series of experimental studies has been carried out with chromium plating of steel cylindrical parts with simultaneous abrasive processing. Beforehand, an abrasive tool with previously developed binder formulations was manufactured. The obtained results of the influence of the characteristics of the abrasive tool and its pressing force on the chromium-plated part on the quality of the precipitated chromium made it possible to determine the optimum modes for obtaining a coating of the required thickness. Also, a suitable abrasive tool has been chosen to obtain a coating of proper quality.
Gas Corrosion of Pyrolysis Furnace Coils
Authors: Mirkhaydarova K.A. , Tyusenkov A.S. , Rizvanov Rif G.
Published: October 2018

The dependence of the rate of gas corrosion of high-alloy steels on temperature is investigated in this article. High corrosion resistance of steels is achieved by introducing into their composition of elements that form thin and strong oxide films on its surface. The most effective alloying elements are chromium, aluminum and nickel. Steel, containing these elements, becomes resistant to gas corrosion at high temperatures. Steels, containing less chromium, are susceptible to gas corrosion to the same extent as carbon steels. The steel 310 S and 316 Ti were tested for heat-resistance. Samples of steel 310 S were cut from a new pipe and from the coil of pyrolysis furnace, which was used for 6800 hours. Tests were carried out at 500 ... 1000 °С. It is established that steel 310 S is more heat-resistant than steel 316 Ti. It is shown that the heat-resistance of steel 310 S decreases after operation in the pyrolysis furnace and has lower values than values of the new steel.
Methods for Determining the Quality of Galvanic Chromium Coating
Authors: Galimov D.M. , Ardashev Dmitry V. , Dyakonov Aleksandr A.
Published: October 2018

The surface and microsections of the cross-section of the chromium coating samples were studied. The microhardness of the coating and the base material was tested, their metallographic studies were conducted. The analysis of the microstructure showed that the base metal of 45 and 38XA steel of all samples is in the normalized state. The analysis of the microstructure of the samples subjected to surface HFC hardening (high frequency currents) showed that the temperature of heating during quenching is insufficient, and it leads to a lower strength and hardness of the layer. The sample with a lower hardness of the chromium coating has a higher coating viscosity and resistance to wear. The sample with the highest microhardness of the coating is characterized by increased brittleness. The hardness of the metal substrate and its structure does not affect the properties of the chromium coating layer.
Research of the Mechanism of Destruction of Compression Molds for Casting under Pressure of Color Alloys
Authors: Gavariev Renat V. , Savin I.A.
Published: October 2018

In the article various approaches to a research of the mechanism of destruction of form-building surfaces of compression molds for the casting under pressure (CUP) are considered. The main reasons for emergence of various defects of working surfaces of form-building details are defined. Method of calculation of the parameters allowing to define operability of concrete products are specified. The option of production of form-building surfaces with the raised operational characteristics drawing sheetings by method of phisical vapour deposition (PVD). is offered. Results of pilot studies on determination of optimum structure of a covering for a form-building surface are given.
Morphology and Chemical Composition of Silicon Carbide Surfaces Interacting with Iron, Cobalt, and Nickel in Microscratching
Authors: Nosenko V.A. , Fetisov A.V. , Puzyrkova Valeria E.
Published: October 2018

The paper dwells upon the specifics of worn spots being formed on a silicon-carbide crystal in microscratching of iron, cobalt, and nickel. Analysis was done using a Versa 3D dual-beam electron microscope. The chemical composition of worn spots was studied by local X-ray microanalysis. It was found out that the amount of metal transferred to the silicon-carbide worn spot was associated with the electron structure of metal atoms.
Relaxation Processes in Ti-Al Composite Material after Rolling
Authors: Gurulev Dmitrii N. , Palatkina Lyubov' V.
Published: October 2018

In the result of application of the load in different sections of the structure elastic or plastic deformation may occur. In its turn, the removal of the applied load can lead to the development of relaxation processes, caused by the intention of the material to return to equilibrium. There is a subtle change of body shape (warping), which depends on its properties, the type of deformation and its nature in the flow of time. In this regard, the consideration of this factor is necessary in the manufacture of various parts and components of LCM using the methods of metal forming (stamping, bending, calibration, etc.) [1-6].
Shape Indexes for Dieless Forming of the Elongated Forgings with Sharpened End by Tensile Drawing with Rupture
Authors: Kukhar Volodymyr V. , Grushko A.V. , Vishtak Inna V.
Published: October 2018

The criteria for the assessment of the form change in the process of direct profiling of workpieces , applying the stretching method with a rupture are developed, methods for their calculation are proposed with allowance for the volume of the redistributed metal and energy costs for deformation. The nature of the functional connection of these criteria of shape change assessment with the work of deformation is determined.