bluuebunny/crossref_metadata_2025 huggingface dataset:
Electron mobility dependence on neutron irradiation fluence in heavily irradiated silicon
Authors: Vaitkus Juozas Vidmantis , Mekys Algirdas , Vaitekonis Šarūnas
Published: June 2021

An increase of neutron irradiation fluence caused a decrease of Si radiation detector efficiency that was exceptionally well seen at 1017 neutron/cm2 fluence when the observed I–V characteristic of p-n junction under forward bias and under reverse bias became similar. Therefore the investigation of free carrier mobility could be a key experiment to understand the change of heavily irradiated silicon. The electron mobility was investigated by magnetoresistance means in microstrip silicon samples at temperature range T = 200–276 K. The analysis included the free carrier scattering by phonons, ionized impurities, dipoles and clusters and a contribution of each process was found by fitting the mobility dependence on temperature. The analysis of experimental data clearly demonstrated that the applied model did not explain the mobility in the samples irradiated to the highest fluence. Therefore a new concept of carrier transport is needed, and, as a conclusion, it could be stated that Si irradiated above 1016 cm–2 fluence (and up to 1020 cm–2) is a disordered material with the clusters.
The influence of environmental heterogeneity on the morphological and genetic diversity of Circaea lutetiana (Onagraceae) in Hyrcanian forests
Authors: Nikzat Sedigheh , Ghasemzadeh-Baraki Somayeh , Naghiloo Somayeh
Published: June 2021

Environmental gradients are important factors that can potentially influence the genetic diversity and differentiation of populations. The present study examines the effect of environmental heterogeneity of the Hyrcanian forests on populations of Circaea lutetiana L. (Onagraceae). Using morphometrics, scanning electron microscopy (SEM) of leaf epidermis, and molecular markers, we analyzed genetic diversity and differentiation among nine populations from environmentally divergent habitats. Three different gene pools were observed. Our results indicate that the genetic structure is significantly correlated to environmental factors, but not to the geographical distance. Genetic clustering in C. lutetiana is affected by temperature, humidity, elevation, and average annual rainfall. Overall, our data indicate that gene flow does not contribute to explaining spatial patterns of genetic structure and the adaptation to the environment is the main factor shaping the genetic structure of the C. lutetiana populations. The populations belonging to each of the three gene pools have similarities in microclimate parameters, despite their geographical proximity, and populations from the same genetic pool can be up to 470 km apart. This evidence, as well as morphological and genetic similarities of the populations with greater geographical distance, suggest the possibility of cryptic speciation in this species.
Revisiting Traveling Salesman Problem (TSP): Analysis of GA and SA based Solutions
Authors: Bethel Darius , Sevil Hakki Erhan
Published: June 2021

The purpose of this study to analyze genetic algorithm (GA) and simulated an-nealing (SA) based approaches applied to well-known Traveling Salesman Prob-lem (TSP). As a NP-Hard problem, the goal of TSP is to find the shortest route possible to travel all the cities, given a set of cities and distances between cities. In order to solve the problem and achieve the optimal solution, all permutations need to be checked, which gets exponentially large as more cities are added. Our aim in this study is to provide comprehensive analysis of TSP solutions based on two methods, GA and SA, in order to find a near optimal solution for TSP. The re-sults of the simulations show that although the SA executed with faster comple-tion times comparing to GA, it took more iterations to find a solution. Additional-ly, GA solutions are significantly more accurate than SA solutions, where GA found a solution in relatively less iterations. The original contribution of this study is that GA based solution as well as SA based solution are developed to perform comprehensive parameter analysis. Further, a quantifiable comparison is provided for the results from each parameter analysis of GA and SA in terms of performance of solving TSP.
Un vivier du ier s. ap. J.-C. à Fréjus
Authors: Excoffon Pierre
Published: June 2021

Totalement insoupçonné avant le début des travaux, le « vivier antique du Kipling », du nom du projet immobilier ayant provoqué sa découverte, constitue à ce jour un modèle de structure piscicole particulier et inédit en Méditerranée occidentale. Les spécificités de sa forme et de son fonctionnement sont dues au détournement de sa fonction primitive, celle d’un puits citerne, qui a imposé au constructeur une série d’adaptations. Une fois raccordée à la mer, cette structure servit un temps à stocker, peut-être à élever des poissons vivant dans un milieu où se mêlent eau de mer et eau douce. Cette découverte apporte d’importantes données au dossier des activités halieutiques encore méconnues à Fréjus, et permet d’illustrer les aménagements antiques de bord de mer, dans la configuration de la côte telle que nous la définissons aujourd’hui. La fouille, menée simultanément avec les travaux de construction du bâtiment, a été réalisée sur une longue période et les données sont toujours en cours d’étude. Cette contribution s’attache donc principalement à présenter les données topographiques et contextuelles du vivier romain du Kipling. La structure découverte a été entièrement conservée, et un projet d’aménagement pour une ouverture prochaine au public est en cours de réalisation.
Considérations sur l’esthétique de la brique apparente dans l’architecture impériale à Rome
Authors: Bukowiecki Evelyne
Published: June 2021

La vision restituée de l’architecture romaine est souvent liée aux finitions claires et lissées des façades des monuments que l’on pense systématiquement enduites ou recouvertes de marbre. On constate cependant que, pour certaines catégories d’édifices, pendant une période chronologique limitée essentiellement à la dynastie antonine et au tout début de la dynastie sévérienne, les maçons et les architectes romains étaient loin d’être insensibles à l’esthétique de la brique apparente pour laquelle ils développèrent une maîtrise remarquable. À partir d’exemples choisis, cette contribution cherchera à mettre en évidence les principes généraux de la brique décorative dans l’architecture impériale à Rome, tant du point de vue de l’agencement des couleurs que du travail hautement qualifié de certains tailleurs de briques.
Des enfants acteurs de leur vie ? Représentations des enfants par les adultes et conséquences sur leur modèle d’autonomie
Authors: Delalande Julie
Published: June 2021

L’enfant est-il un être à modeler ou bien l’éducation consiste-t-elle à lui offrir les conditions de son accomplissement personnel ? Les acteurs sociaux apportent des réponses différentes à ces questions en fonction des valeurs qui dirigent leurs comportements et qui proposent des manières multiples d’intégrer un enfant dans un groupe social. Dans le modèle communautaire, il est attendu que l’enfant mobilise son jeu d’acteur au service du groupe. Dans le modèle individualiste, l’enfant est valorisé s’il suit son propre chemin, en fonction de ses intérêts personnels. Ces grilles d’analyse nous aident à décoder l’attitude de parents au moment où leur enfant intègre le collège et gagne en autonomie, du fait d’un contexte scolaire et social qui change et sollicite une nouvelle maturité de sa part. Elles nous aident aussi à comprendre la place que les adultes, parents et enseignants donnent au groupe de pairs. Comment l’enfant est-il acteur de sa vie, entre les attentes des adultes et celles du groupe de pairs ? Alors que notre société prône une autonomie des individus à construire dès l’enfance pour correspondre à son idéal individualiste qui conçoit l’enfant comme personne, la co-présence de cette représentation avec le modèle de l’enfant du lignage et de l’enfant de la Nation complique le jeu des acteurs.
Profils des jeunes adultes en situation de « raccrochage » au Québec. Le cas particulier des jeunes femmes inscrites en Centre d’Éducation des Adultes
Authors: Villatte Aude , Corbin July , Marcotte Julie
Published: June 2021

Chaque année, une proportion importante des élèves québécois (environ 17 %) quitte le secondaire sans diplôme (Institut de la Statistique du Québec, 2013). La proportion de jeunes raccrochant au système scolaire, soit environ 25 %, permet toutefois de nuancer l’ampleur de ce phénomène (Marcotte, Cloutier & Fortin, 2010). Après avoir présenté la diversité des profils psychosociaux des jeunes inscrits dans un Centre d’Éducation aux Adultes (CEA), principal dispositif de raccrochage scolaire au Québec, nous analyserons plus spécifiquement le cas des jeunes femmes qui persévèrent ou raccrochent au sein de ces milieux puisqu’elles représentent un sous-groupe particulièrement vulnérable. L’emphase sera mise sur l’impact des expériences relationnelles vécues par ces apprenantes au secondaire, sur leur adaptation psychologique actuelle et sur le rôle majeur que peuvent jouer les CEA pour modifier la perception négative qu’elles entretiennent au sujet de l’école. Ces résultats permettent de mettre en exergue l’importance de développer et valoriser les milieux de raccrochage scolaire au Québec et ailleurs afin de promouvoir l’adaptation psychosociale des jeunes adultes.
Using three elementary particles to construct the physical world
Authors: Li Huawang
Published: June 2021

In this paper, we conjecture that gravitation, electromagnetism, and strong nuclear interactions are all produced by particle collisions by determining the essential concept of force in physics (that is, the magnitude of change in momentum per unit time for a group of particles traveling
in one direction), and further speculate the existence of a new particle, Yizi. The average kinetic energy of Yizi is considered to be equal to Planck’s constant, so the mass of Yizi is calculated to be   7.37
×   10   − 51     kg and the
average velocity of Yizi is   4.24 ×   10  8
 m/s. The universe is filled with Yizi gas, the number density of Yizi can reach   1.61 ×   10
 64     /m3, and Yizi has no charge. After abandoning the idealism of physics, I try to construct a physical framework from three elementary particles: Protons, electrons,
and Yizis. (The elementary particles mentioned here generally refer to the indivisible particles that constitute objects.) The effects of Yizi on the conversion of light, electricity, magnetism, mass, and energy as well as the strong nuclear and electromagnetic forces are emphasized. The gravitation
of electromagnetic waves is measured using a Cavendish torsion balance. It is shown experimentally that electromagnetic waves not only produce pressure (repulsion) but also gravitational forces upon objects. The universe is a combination of three fundamental particles. Motion is eternal and
follows the laws of conservation of energy and momentum. There is only one force: The magnitude of change in momentum per unit time for a group of particles traveling in one direction. Furthermore, this corresponds to the magnitude of the force that the group of particles exerts in that direction.
From this perspective, all physical phenomena are relatively easy to explain.
Catalytic Activity of Char Obtained from Fast Pyrolysis in Esterification Reactions
Authors: Godina Daniela , Pomilovskis Ralfs , Meile Kristine , Iljina Nadežda , Zhurinsh Aivars
Published: June 2021

In this study different pathways for obtaining activated carbon with catalytical activity were analysed. Industrially fast pyrolysis is an efficient way of lignocellulosic biomass processing, since in this process various important high value chemicals are obtained. Biochar is obtained as the by-product in fast pyrolysis process from which activated carbon can be acquired with further chemical activation. Different methods for chemical activation of biochar were tested with the obtained activated charcoals being used as a catalyst in esterification reactions to evaluate their potential use as a heterogenic catalyst. Highest catalytical activity was observed when biochar was pre-treated with sulfuric acid at 80 °C for 24 hours. The obtained activated charcoal could be used as a catalyst for up to five times with no noticeable decrease in catalytic activity.
Strength and Deformability of Hollow Thin-Walled Mini-Spheres
Authors: Mironov Viktor , Blumbergs Ervins , Tatarinov Alexey , Kalnins Kaspars
Published: June 2021

Thin-walled hollow mini-spheres several millimeters in diameter have promising applications as components for the absorption of sound, pressure pulses and mechanical vibrations, as well as heat transfer elements. In this paper, an assessment of some physical and mechanical properties, including the strength and elasticity of metallic mini spheres, is given. To a great extent, the properties are determined by the wall material, however, can be modified by the coating as well.
Deposition of YSZ Layer by PS-PVD on Different Materials
Authors: Góral Marek , Kubaszek Tadeusz , Poręba Marek , Wierzbińska Małgorzata
Published: June 2021

Plasma Spray Physical Vapour Deposition (PS-PVD) method was designed for production of ceramic layer on nickel superalloys. In typical process before deposition the base material is heated by plasma up to 900 °C. In present article the yttria stabilized zirconia (YSZ) was deposited on low melting point materials: 2017A-type aluminium alloy and Cu-ETP copper. The influence of power current, process time and powder feed rate on structure and thickness of obtained coatings was analysed. During first deposition process the overheating of Al-sample was observed and as result the power current was decreased to 1600 A. In the next experimental the approx. 5 mm thick dense coating was formed. During experimental processes of YSZ deposition on copper the thickness of coating increased from approx. 5 to 22 mm. The copper-oxide layer was formed under ceramic layer. The microscopic assessment showed the difficulties in formation of columnar ceramic layer on use base materials. The obtained coating was characterized by dense structure as a result of lower plasma energy during process. The increasing of power current is not possible in the case of overheating of base material.
Defining the Glycosaminoglycan Interactions of Complement Factor H–Related Protein 5
Authors: Gyapon-Quast Frederick , Goicoechea de Jorge Elena , Malik Talat , Wu Nian , Yu Jin , Chai Wengang , Feizi Ten , Liu Yan , Pickering Matthew C
Published: June 2021

Complement activation is an important mediator of kidney injury in glomerulonephritis. Complement factor H (FH) and FH-related protein 5 (FHR-5) influence complement activation in C3 glomerulopathy and IgA nephropathy by differentially regulating glomerular complement. FH is a negative regulator of complement C3 activation. Conversely, FHR-5 in vitro promotes C3 activation either directly or by competing with FH for binding to complement C3b. The FH–C3b interaction is enhanced by surface glycosaminoglycans (GAGs) and the FH–GAG interaction is well-characterized. In contrast, the contributions of carbohydrates to the interaction of FHR-5 and C3b are unknown. Using plate-based and microarray technologies we demonstrate that FHR-5 interacts with sulfated GAGs and that this interaction is influenced by the pattern and degree of GAG sulfation. The FHR-5–GAG interaction that we identified has functional relevance as we could show that the ability of FHR-5 to prevent binding of FH to surface C3b is enhanced by surface kidney heparan sulfate. Our findings are important in understanding the molecular basis of the binding of FHR-5 to glomerular complement and the role of FHR-5 in complement-mediated glomerular disease.
Development and validation of women’s environmental health scales in Korea: severity, susceptibility, response efficacy, self-efficacy, benefit, barrier, personal health behavior, and community health behavior scales
Authors: Kim Hee Kyung , Kim Hyun Kyoung
Published: June 2021

Purpose: This study aimed to develop the following scales on women’s environmental health and to examine their validity and reliability: severity, susceptibility, response efficacy, self-efficacy, benefit, barrier, personal health behavior, and community health behavior scales.Methods: The item pool was generated based on related scales, a wide literature review, and in-depth interviews on women’s environmental health according to the revised Rogers’ protection motivation theory model. Content validity was verified by three nursing professionals. Exploratory factor analysis, convergent validity, and internal consistency reliability were examined.Results: The scales included 10 items on severity, 11 on susceptibility, 10 on response efficacy, 14 on self-efficacy, 8 on benefits, 10 on barriers, 17 on personal health behavior, and 16 on community health behavior. Convergent validity with the environmental behavior scale for female adolescents was supported. The Cronbach’s α values for internal consistency were good for all scales: severity, .84; susceptibility, .92; response efficacy, .88; self-efficacy, .90; benefits, .91; barriers, .85; personal health behavior, .90; and community health behavior, .91.Conclusion: The evaluation of the psychometric properties shows that these scales are valid and reliable measures of women’s environmental health awareness and behaviors. These scales may be helpful for assessing women’s environmental health behaviors, thereby contributing to efforts to promote environmental health.
A local seismic survey at Creighton Mine
Authors: Plouffe M
Published: June 2021

The Creighton Mine, Sudbury, was chosen as a test site to conduct a pilot survey using a portable seismograph recently acquired by CANMET. During the approximate two-month period, 208 seismic events were recorded. Of that number 183 were classified as blasts, and
22 were classified as mining induced seismic events, including a 3.6 mN rockburst.
Waveform analysis was performed on these data. The results are in relatively good agreement with those from other Northern Ontario mines without any major discrepancies.
Traditional Medicine Diagnostic Codes in ICD-11 and Alternative Diagnostic Classifications in the Mainstream Healthcare
Authors: Solos Ioannis , Morris William , Zhu Jian-Ping , Hong Mei
Published: June 2021

In 2018, the 11th Edition of the International Classification of Diseases (ICD-11) defined a diagnostic code list for standard traditional medicine (TM) conditions. The codes improve patient safety by providing more comprehensive and accurate medical records for hospitals in the Western Pacific Region. In these facilities, TM is often a standard of care for those populations. In several mainstream media sources, writers are circumventing evidence-based peer-reviewed medical literature by unduly influencing public opinion and, in this case, against the new ICD-11 codes. The dangers imposed by the transgression of popular writing onto the discipline of peer-reviewed works are present since best practices in medical record-keeping will fail without the inclusion of TM in the ICD-11 codes. Such failures directly affect the health of the patients and policymakers in regions where TM and conventional medicine are combined. This article investigates the boundaries between substantial evidence and popular opinion. In this era where media is used to manipulate evidence, the reader's use of sound judgment and critical thought are thwarted. This article also challenges three controversial themes in pop literature, including the threat to endangered species, increased patient risk, and contaminants in the TM. These themes are made without evidence and are, in fact, of flawed logic. There is no reason to assume that improved medical record-keeping and knowledge of patient cases increase risks.
A Prospective, Multicenter, Single-Arm Study of Performance of the Micra Transcatheter Pacemaker in Chinese Patients
Authors: Chen Keping , Zhang Shu , Wu Liqun , Liu Xingbin , Su Yangang , Zhou Yujie , Zou Jiangang , Wang Jian-An , Xiang Meixiang , Guo Chengjun , Ren Xuejun , Hou Xiaofeng , Liu Shufeng , Zhang Ming , Fagan Dedra H. , Cao Kejiang
Published: June 2021

Background:

We have compared the patient characteristics and safety and efficacy results of the Micra transcatheter pacemaker from the China Micra Transcatheter Pacing Study with those from the global trials.

Subjects and Methods:

In this prospective, multicenter, single-arm study, patients with a class I or II guideline recommendation for single-chamber pacemaker therapy were enrolled from seven centers in China between July 30, 2018, and December 12, 2018. The primary outcome measure of this study was freedom from system- or procedure-related major complications through 6 months postimplantation (prespecified performance goal 83%). Patient baseline characteristics and major complications were compared with data from the global trials. Performance after medically indicated magnetic resonance imaging (MRI) scans was characterized. The study was approved by the ethics committee at each participating center and registered with ClinicalTrials.gov (Identifier: NCT03624504).

Results:

Implantation was successful in 81 of 82 (98.8%) patients with a mean follow-up of 8.7 ± 1.5 months. Chinese patients who had lower body mass index were more often female, and less frequently had a pacing indication associated with atrial fibrillation (AF) compared with global patients. Through 6 months postimplantation, two major complications occurred, with a major complication-free rate of 97.6% (95% confidence interval: 90.6–99.4%), exceeding the primary endpoint performance goal (P = 0.002). The major complication rate was in line with rates from the Micra investigational trial and Post-Approval Registry (2.4% vs. 3.7% and 2.9%, respectively, P = 0.50). Among 14 patients who underwent 3T MRI scans, electrical performance was stable with mean pre- and post-MRI pacing thresholds of <0.5 V. No MRI-related device performance issues were observed.

Conclusion:

In the hands of new operators in China, the Micra pacemaker was implanted successfully with a very low complication rate. Although Chinese Micra patients were on average of smaller stature and the majority had a pacing indication not associated with AF, Micra performance was excellent and in line with the global trial experience.
Platelet-rich plasma and fibrin glue for conjunctival autograft attachment in a recurrent neurotrophic sclero-conjunctival ulcer secondary to a chemical burn
Authors: Gómez-Benlloch Alba , Salvador-Culla Borja , de la Paz María F
Published: June 2021

A patient with recurrent neurotrophic sclero-conjunctival ulcer secondary to chemical injury with sodium hydroxide underwent three failed amniotic membrane transplants and a resection of the keratinized tissue plus oral mucosal graft. Despite this intensive treatment, the ulcer did not close completely. Thus, a conjunctival autograft from the contralateral eye was performed, together with autologous platelet-rich plasma (PRP) and fibrin glue (FG) to attach the graft. One year later, the eye was quiet, with no signs of sclero-conjunctival ulcer. The mixture of PRP and FG appears to be capable of attaching a conjunctival autograft and promoting the healing of sclero-conjuctival ulcers.
Structural and functional recovery of macular atrophy following acute traumatic maculopathy
Authors: Lyons Duncan , Drury Brett
Published: June 2021

This case report describes a rare case of spontaneous structural and functional recovery of macular atrophy following acute traumatic maculopathy. A 53-year-old man suffered a blunt left-eye injury. Initial optical coherence tomography showed evidence of macular hole formation. Over the following month, macular atrophy developed, with left best-corrected visual acuity ranging from 6/24 to 6/18. Following 14 months, the atrophy spontaneously resolved – correlating with left visual acuity improving to 6/6. Although the outcome from severe traumatic maculopathy and subsequent macular atrophy is almost uniformly considered to be poor, this rare case demonstrates that spontaneous recovery may still occur.
Drawstring temporary tarsorrhaphy with tarsal internal fixation for corneal protection
Authors: Miura Maria , Kobashi Hidenaga , Zhai Hualei , Ciolino Joseph B
Published: June 2021

For a 47-year-old woman presented with a persistent corneal ulcer that was refractory to antibiotic drugs and amniotic transplantation, we performed both drawstring temporary tarsorrhaphy with tarsal internal fixation of the upper lid. Two weeks postoperatively the epithelial defect was resolved. The eyelid did not exhibit any complications such as trichiasis or skin necrosis. A drawstring temporary tarsorrhaphy with tarsal internal fixation was an effective treatment for the protection of the ocular surface and can be used to treat persistent corneal epithelial defects and exposure keratopathy.
Bilateral acute iris transillumination in a young woman
Authors: Mohan Neethu , Venkataraman Prasanna , Paul Nithila EG
Published: June 2021

Bilateral acute depigmentation of iris and bilateral acute iris transillumination are entities characterized by acute onset of pigment dispersion in the anterior chamber, discoloration of the iris stroma, pigment deposition in the anterior chamber angle, and elevation of intraocular pressure. A 39-year-old woman presented with acute onset pain and redness in both eyes. On examination, both eyes showed clear cornea, deep anterior chamber, and profound pigment dispersion and raised intraocular pressure with no signs of anterior uveitis. Ocular hypertension was refractory to medical therapy necessitating. Prompt differentiation of this condition from uveitis is crucial to avoid prolonged unwarranted steroid therapy.
Orbital foreign body in a child presenting with cardiogenic shock
Authors: Singh Thangjam A , Nongrum Benjamin , Goswami Prasanta K , Okhyopvui Renjano N
Published: June 2021

Orbital foreign bodies can have a variety of presentations like restriction of extraocular movement and orbital cellulitis. A child sustained injury to the right eye with a piece of wood. He had features of cellulitis but no signs of septicemia. The noncontrast computed tomography showed a hyperdense structure suggestive of a large foreign body located in the retro-orbital area upto the apex of the orbit. He presented with shock which was consistent with cardiogenic shock, probably secondary to oculocardiac reflex, as evident by the presence of bradycardia, systemic hypotension and low SpO2. On removal of the foreign body, the vitals improved.
Acute endophthalmitis caused by Ochrobactrum anthropi following cataract surgery in an immunocompetent patient – A case report
Authors: Nag Adwaita , Verma Aditya , Anand A R
Published: June 2021

A 54-year-old man developed left eye inflammation three days after cataract surgery and was diagnosed with endophthalmitis. Aqueous culture revealed Ochrobactrum anthropi resistant to vancomycin and cephalosporin. Systemic and intravitreal ciprofloxacin injections caused only transient improvement and eventually, pars plana vitrectomy was done. There was complete resolution, good visual recovery, and no recurrence. O.anthropi is an uncommon organism with a characteristic resistance to empirical antibiotics and usually causes chronic infection in immunocompromised. We report a rare case of acute endophthalmitis in an immunocompetent patient. To the best of our knowledge, this is the first report of O. anthropi endophthalmitis from India.
A rare case of racemose ocular myocysticercosis masquerading as exotropic Duane's retraction syndrome
Authors: Monga Sumit , Jain Puneet , Sethi Geeta
Published: June 2021

A 13-year-old girl presented with recent onset diplopia. At presentation, she had an ocular motility deficit resembling left eye exotropic-Duane's retraction syndrome. On imaging, her left eye lateral rectus was grossly swollen, with the presence of an elongated cystic lesion in its belly. The latter was a rare presentation of racemose cysticercosis, an uncommon variant of neurocysticercosis, hitherto unreported in an extraocular muscle. The child was medically managed with oral steroids and albendazole. There was a partial resolution of ocular motility deficit and complete regression of the intramuscular cysticercus lesion.
Persistent fetal vasculature with microphakia, lacrimal drainage disorder, and congenital ptosis
Authors: Khurana Surbhi , Gupta Parul C , Ram Jagat
Published: June 2021

Persistent fetal vasculature (PFV) is a rare congenital ocular anomaly, characterized by failure of regression of embryonal hyaloid vasculature and is known to cause a broad range of anomalies. We report a 3-month old female infant with PFV, congenital nasolacrimal duct obstruction, and congenital ptosis in the left eye. At the time of lens aspiration, microphakia was seen after dilatation with a Malyugin ring. The child underwent uneventful lens aspiration, primary posterior capsulotomy, and anterior vitrectomy. All these features point towards role of abnormal embryological development in PFV. The meticulous surgical technique is essential to prevent intraoperative and postoperative complications in these patients.
True muscle transplantation surgery for large angle exotropia
Authors: Rao Sonali , Gupta Atulyakruti
Published: June 2021

Managing large-angle exotropia (>70 PD) can be challenging with the various techniques available. In this case series, we present “True Muscle Transplantation"––a simple technique––to manage large-angle sensory exotropia as a possible alternative. Seven patients (four women and three men) of mean age 39.71 ± 17.38 years with sensory large-angle exotropia (>70 PD) underwent proposed surgery after detailed preoperative workup. The stump resected from MR was transplanted to LR and recessed. The mean preoperative deviation of 77.14 ± 4.52 PD base-in reduced to mean postoperative angle of 4.71 ± 4.42 PD at 6 months with good ocular alignment, no lateral incommittance, and no limitation of ductions in all patients. Stable results were maintained beyond 6 months. True Muscle Transplantation, therefore, has the potential of being a possible alternative.
Bilateral congenital rubella retinopathy in monochorionic monoamniotic twins
Authors: Buragohain Suklengmung , Das Dipankar , Deori Nilutparna , Deka Hemlata , Magdalene Damaris , Paharia Anubhi
Published: June 2021

Congenital rubella syndrome in twins is rare, and when present, there is a variable effect on the fetuses depending on unknown factors. The available literature on CRS in twins is very limited with only a few reported cases. We report a rare case of a pair of monochorionic monoamniotic twins who were diagnosed as having bilateral congenital rubella retinopathy in both eyes.
A toothless future? What anthropological studies may tell us about generations to come
Authors: Soileau Kristi M. , Brailsford Laura , Stewart Brittney , DeGenova Adam
Published: June 2021

Since teeth are the most preserved skeletal remains found in fossils, they can provide an excellent historical record about the adaptive changes that have taken place in the orthognathic complex of modern-day Homo sapiens, as well as the ways by which these evolutionary modifications have affected overall health and lifestyle through time. The study of ancestral dietary progression from trees to grasses and plains as projected through carbon dating has made possible much of today's enlightenment as to the adaptive physiologic nature that has taken place within the species. This understanding, in tandem with the observed morphological changes which have occurred in the anatomy of the teeth and the bony contours and muscle attachments of the skull and jaws in which they are housed, has elucidated present-day scientists as to the means by which the human orthognathic complex was developed, and the ways by which this likely affected overall health and lifestyle over the past millennia. Extrapolation from our current understanding of phylogenetic cause and effect as gleaned from studies of fossilized teeth and jaws to date may enable us to propose potential future anthropological dynamics and adaptations as man becomes ever more modern.
Comparative evaluation of shear bond strength of acrylic teeth with heat polymerized acrylic resins using different surface treatments and curing cycles – An in vitro study
Authors: Amulya K. S. , Chakravarthy A. Kalyan , Prasad B. Veerendra , Avinash R. , Babu Kumbham Kiran , Sandhu Kavya
Published: June 2021

Purpose:

This study evaluated the bond strength of acrylic resin denture teeth to heat cure denture base resin processed under different curing cycles and after various surface treatments on the bonding surface area of acrylic denture teeth.

Materials and Methods:

A two-piece metal mold of 35 mm length and 12 mm diameter was fabricated to standardize the attachment of teeth at 45°. Ninety such wax cylinders were obtained and were randomly divided and coded into three groups of 30 samples each: Group “A” – the “Control” group, Group “B” – the “MMM” group, and Group “C” – the “Acetone” group with Subgroup 1 – processing with short curing cycle and Subgroup 2 – processing with long curing cycle in each group. These 90 wax cylinder specimens were then flasked, dewaxed as per the standard protocol and surface treatment of teeth, and curing was done. The samples were tested in a universal testing machine.

Results:

ANOVA analysis inferred that there was a statistically significant difference between the mean bond strength values among the groups.

Conclusion:

Analysis of mean bond strength values reveals that the mean bond strength values of acetone were significantly higher (P < 0.05) when compared to the other groups.
Associated Vibrio Species in Shrimp Vibriosis from Traditional Brackish Water Pond in the North Coastal of Central Java, Indonesia
Authors: Sarjito Sarjito , Sabdono Agus
Published: June 2021

Indonesian shrimp cultures are threatened by vibriosis. Some traditional brackish water ponds remained along the north coast of Central Java after the disease outbreaks destroyed the shrimp culture. This study aimed to discover the Vibrio diversity associated with shrimp vibriosis in traditional brackish water ponds. An exploratory method with purposive sampling was used in this study. Twenty-four shrimps presumably infected with vibriosis were collected from two district regions on the north coast of Central Java in July–September 2018. The bacteria associated in shrimp vibriosis were isolated from the telson and inner part of the hepatopancreas with TCBS medium. Forty-one bacteria associated with shrimp vibriosis were obtained, and then repetitive-polymerase chain reaction (rep-PCR) was performed to obtain Vibrio strains. On the basis of rep-PCR results, five respresentative strains were selected for further study. The results of 16S rDNA sequence analysis showed that the JKP03, JKP05, JKP19, JKM01, and JKM06 isolates were closely related to Vibrio rotiferianus, Vibrio diabolicus, Vibrio parahaemolyticus, Vibrio alginolyticus, and Shewanella algae, respectively. Vibrio biodiversity in shrimp vibriosis was high. These results confirmed that traditional shrimp farming was susceptible to vibriosis. Therefore, control methods such as vaccines, probiotics, and immunostimulant formulas must be developed to prevent and control the outbreak of shrimp vibriosis in traditional brackish water pond.
О разложениях решений уравнения Риккати
в асимптотические ряды
Authors: Samovol Vladimir Simkhovich
Published: June 2021

Рассматриваются скалярные вещественные уравнения Риккати
с коэффициентами, раскладывающимися в сходящиеся степенные ряды
в окрестности бесконечности. Исследуются продолжаемые решения
таких уравнений. Методами степенной геометрии получены
условия разложений этих решений в асимптотические ряды.
Библиография: 8 названий.
Операторы почти адамаровского типа и
оператор Харди-Литтлвуда в пространстве целых функций
многих комплексных переменных
Authors: Ivanova Olga Aleksandrovna , Melikhov Sergej Nikolaevich
Published: June 2021

Вводится класс операторов почти адамаровского типа,
т.е. тех линейных непрерывных операторов
в локально выпуклом пространстве, содержащем все многочлены,
для которых однородные многочлены любой (фиксированной) степени
образуют их инвариантное подпространство. Частным случаем
операторов почти адамаровского типа являются
операторы адамаровского типа (диагональные),
для которых каждый моном является их собственным вектором.
Исследованы операторы почти адамаровского типа в пространстве
всех целых функций многих комплексных переменных.
Доказанные результаты применены к описанию
всех линейных непрерывных в этом пространстве операторов,
перестановочных в нем с многомерным аналогом
оператора Харди-Литтлвуда.
Библиография: 31 название.
Design and implementation of the driver system for Hamamatsu C12880MA microspectrometer
Authors: Sokołowski Patryk , Wróbel Maciej Stefan , Karpienko Katarzyna
Published: June 2021

Recent miniaturization developments in devices for spectroscopy have reduced greatly their costs and increased their availability for a wide range of users and applications. This paper presents the design and implementation of a driver system for a Hamamatsu C12880MA microspectrometer. The system implementation was carried out and compared using two independent microcontroller modules: Arduino Uno and STM32F411RE Nucleo. We assessed the microspectrometer system parameters like resolution and integration time, as influenced by the choice of a driver microcontroller. We present a possible application of this microspectrometer system for measurements of ground coffee beans reflectance for control of coffee roasting. Full Text: PDF ReferencesCrocombe RA. Portable Spectroscopy. "Portable Spectroscopy", Applied Spectroscopy. 2018;72(12):1701-1751 CrossRef Datasheet Hamamastu C12880MA DirectLink Datasheet Arduino Uno DirectLink Datasheet STM32F411RE DirectLink Hernández, J. A., B. Heyd, and G. Trystram. "Prediction of brightness and surface area kinetics during coffee roasting." Journal of Food Engineering 89.2 (2008): 156-163. CrossRef
Cydianerus latruncularius (Coleoptera: Curculionidae) damaging trumpet trees leaves (Handroanthus spp., Bignoniaceae) in Brasília, Brazil
Authors: Castro Marcelo Tavares de , Montalvão Sandro Coelho Linhares , Monnerat Rose Gomes , Queiroz Dalva Luiz de
Published: June 2021

Cydianerus latruncularius Perty (Coleoptera: Curculionidae) were observed associated with trumpet trees (Handroanthus spp.) in Brasília, Brazil, in 2019. To contribute with information about their habits and damage, 15 trees (Handroanthus impetiginosus = 7, H. roseoalbus = 4, and Tabebuia rosea = 4) were evaluated and 31 individuals of C. latruncularius were captured, often found within or close to leaf rolls caused by the psyllid Trioza tabebuiae Burckhardt & Santana (Hemiptera: Triozidae). The damage caused by C. latruncularius consists of irregular injuries at the leaves’ edges. This is the first report of this beetle occurring on trumpet trees.
TEKNOLOGI IB TEKNOLOGI IB PADA AYAM HUTAN HIJAU JANTAN DENGAN AYAM KAMPUNG BETINA DALAM UPAYA PELESTARIAN PLASMA NUFTAH AYAM BEKISAR
Authors: Andaruisworo Sapta
Published: June 2021

Penelitian ini bertujuan untuk mengetahui Dosis Penyuntikan Berbeda Ayam Hutan Hijau Jantan Dengan Ayam Kampung Betina Menggunakan Teknologi IB Terhadap Fertilitas Dan Daya Tetas. Rancangan yang digunakan dalam penelitian ini adalah menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 4 ulangan dimana setiap ulangan terdiri dari 4 ekor ayam Kampung Betina Produksi. Dengan perlakuan yaitu Kandang A (Penyuntikan dengan dosis 0,05ml), Kandang B (Penyuntikan dengan dosis 0,1ml), Kandang C (Penyuntikan dengan dosis 0,2ml), Kandang D (Penyuntikan dengan dosis 0,3ml) dengan analisa Chi Quadrat dan dilanjutkan dengan Kontigensi dan Uji Korelasi ®

Chi Kuadrat hitung Fertilitas lebih kecil dari Chi Kuadrat tabel (0,040 < 7,815), dan Chi Kuadrat hitung Daya Tetas juga lebih kecil dari harga Chi Kuadrat tabel (0,0401 < 7,815). Jadi hasil penelitian ini menunjukkan bahwa terbukti dosis penyuntikan yang berbeda tidak mempengaruhi tingkat Fertilitas dan Daya Tetas telur hasil IB ayam Hutan Hijau Jantan dengan Ayam Kampung betina.

Kesimpulannya adalah Fertilitas telur hasil percobaan tertinggi pada kandang A 76,92% dengan dosis penyuntikan 0,05ml, dan daya tetas telur tertinggi hasil percobaan juga terdapat pada kandang A dengan tingkat daya tetas 85 % dosis penyuntikan 0,05ml.
Learning machines. Prototipado experimental en torno al diseño, la materia y los saberes tácitos
Authors: Guerrero Ana
Published: June 2021

Esta investigación tiene por objetivo evaluar y analizar cuáles son las prácticas ligadas al prototipado que nos permiten cuestionar los sistemas clásicos de producción del conocimiento, así como explorar las tensiones y oportunidades que entrelazan la experiencia con el aprendizaje directo del conocimiento tácito.
Me interesan los artefactos-dispositivos-procesos que hacen posible el cambio, la transformación y el aprendizaje del conocimiento que se está generando. Artefactos que investiguen, diseñen y cuestionen formas de producción de saberes prácticos. Prácticas sensibles al proceso de generación de conocimientos en la acción a partir de la experiencia y el diálogo con lo material.
En este caso, se parte de máquinas que se presentan como un método de investigación en el campo del diseño, como una plataforma de expresión y una herramienta inmediata que activa experiencias, donde pensar con otros no se limita a lo humano de manera performática. Máquinas con un hacer que deambula entre las lógicas de la producción digital y la artesanal, que habitan y exploran un umbral incierto de agencias mediadas por la materia.
El azar, la intuición y, a veces, la suerte, aparecen de forma inevitable en el proceso. Es necesario no tener una idea preconcebida del resultado y dar cabida a los accidentes y errores. Procesos donde la experimentación es una parte crucial, un espacio donde descubrir nuevas relaciones, posibilidades, límites y diálogos.
El prototipado de las máquinas cuestiona los paradigmas del saber, los tensa y posibilita encarnar saberes que, posteriormente, pueden ser trasladados a través del diseño como espacio, así como herramienta donde concluyen estos conocimientos.
ÇATLAK DERİNLİĞİNİN VE FİBER AÇISININ KARBON FİBER TAKVİYELİ POLİMER KOMPOZİT KİRİŞİN TİTREŞİM DAVRANIŞINA ETKİSİNİN SONLU ELEMANLAR ANALİZİ YÖNTEMİ İLE BELİRLENMESİ
Authors: ERGENE Berkay
Published: June 2021

Bu çalışmada, % 50 karbon fiber takviyeli polimer (KFTP) kompozit bir kirişte çatlak bulunup bulunmaması, bulunması durumunda ise 1, 2, 3, 4 ve 5 mm derinliğindeki çatlağın ilgili kirişin titreşim davranışlarını nasıl etkilediği Ansys APDL programı kullanılarak sonlu elemanlar analizi yöntemiyle incelenmiştir. Farklı çatlak derinliğine sahip ve çatlaksız KFTP kompozit kirişler Ansys APDL programında modellenmiş olup, malzeme özellikleri olarak da kompozit malzemelerin karışım kuralı eşitlikleri ile belirlenen malzeme özellikleri sonlu eleman analizlerinde atanmıştır. Ayrıca, 200 mm uzunluğunda, 20 mm genişliğinde ve aynı fiber açılarına sahip her biri 0,5 mm kalınlıkta 6 katmandan oluşan toplam kalınlığı 3 mm olan KFTP kompozit kirişler sol kenarından ankastre mesnetlenmiş, sağ kenarı ise serbest uç olarak bırakılmıştır. Ek olarak, 6 katmandan oluşan KFTP kompozit kirişin fiber açıları da 0⁰, 15⁰, 30⁰, 45⁰, 60⁰, 75⁰ ve 90⁰ olacak şekilde değiştirilerek, fiber açısının çatlaklı ve çatlaksız kirişin doğal frekansına olan etkileri de irdelenmiştir. Elde edilen sonuçlara göre, fiber açısının ve çatlak derinliğinin KFTP kompozit kirişlerin doğal frekans değerlerini genel olarak % 10 ile % 20 aralığında değiştirebildiği, doğal frekansların değişiminde çatlak derinliğine nazaran fiber açısının daha etkili olduğu görülmüştür.
Eski Türkçeden Günümüze Şişek Sözcüğü
Authors: TAŞKIRAN Halil İbrahim
Published: June 2021

Bu çalışmada şişek sözcüğünün tespit edebilen ilk kaydındaki biçim ve anlamından günümüzdeki biçim ve anlamlarına gelene kadar geçirdiği değişim aktarılmaya çalışılmıştır. Bu amaçla çalışma: Giriş, Eski Türkçede Tişek Sözcüğü, Tarihî Kıpçak-Harezm ve Çağatay Eserlerinde Şişek Sözcüğü, Eski Oğuz Türkçesi Eserlerinde Şişek Sözcüğü, Türkiye Türkçesi ve Ağızlarında Şişek Sözcüğü, Çağdaş Türk Dillerinde Şişek Sözcüğü, İçeriği Farklı Sözlüklerde Şişek Sözcüğü, Şişek Sözcüğüne Dair Köken Bilgisi Açıklamaları ve Sonuç olmak üzere dokuz başlık altında toplanmıştır. şişek sözcüğü, tarihî Türk dillerinden Eski Türkçe döneminde Dîvânu Lugâti’t- Türk’te tişek biçimiyle “iki yaşındaki koyun” anlamında bir kez geçmekteyken, çağdaş Türk dillerinde en az iki biçimi ve birçok farklı anlamı bulunmaktadır. Bu biçim ve anlamların tarihî Türk dilleri ile çağdaş Türk dilleri ve Anadolu ağızlarındaki durumu şu şekildedir: Eski Türkçe tişek’ten gelişen şişek ve Anadolu ağızlardaki işek, fişek, şişak, şişey, şüşek türevleri “çeşitli yaşlardaki erkek ve dişi koyun; enenmiş koyun; doğurmamış genç manda” anlamları yanında “balık” anlamını da ifade etmektedir. Eski Türkçe tişe-’den gelişen dişe- biçimi Türkiye Türkçesinde “diş çıkarmaya başlamak (bebekler hakkında); diş çıkarmak” anlamına, Kumuk Türkçesinde tişe- olarak “1. Yonmak, yontmak; taşnı tişemek ‘taşı yontmak’; 2. mec. Birini birine, bir şeye saldırtmak”, Kaşgar ve Yarkend ağzında tişa- biçimi “1. Testerenin dişlerini eğelemek; 2. çişi- ‘yaşını doldurmak” anlamlarına evrilmiştir.
Ein altuigurisches Dharmaśarīrasūtra nach einer chinesischen Version
Authors: ZIEME Peter
Published: June 2021

Das altuigurische Fragment U 4830 (T II Y 6) der Berliner Turfan-Sammlung wird hier zusammen mit der originalen chinesischen Passage des Dharmaśarīrasūtra (Foshuo) fashen jing (佛説)法身經(T.XVII.0766.0699b18-700c08) ediert und verglichen. Bilinguale sanskritische/altuigurische Fragmente Textes waren bereits bekannt. Das hier veröffentlichte Bruchstück bezeugt einmal mehr, daß bei den uigurischen Buddhisten ein Interesse für das Sūtra oder vielleicht sogar ganz allgemein für dogmatische Begriffsreihen bestand.
Identidades Sociales y Realidades Geográficas en el Asociacionismo Deportivo
Authors: Soria Cáceres Carlos Hugo
Published: June 2021

El significado de los nombres que podemos encontrar en los clubes deportivos es, con frecuencia, herencia de un proceso histórico con lazos arraigados en la propia idiosincrasia del lugar. Conocer su significado ayuda a entender el contexto en el que nacieron y su posterior evolución hasta nuestros días. El análisis que se realiza en este artículo pretende vislumbrar la importancia de la identidad colectiva a partir del sentimiento de pertenencia a un club deportivo. Bajo esta perspectiva sociológica y geográfica, se propone un estudio del origen y significado de los nombres en diferentes entidades futbolísticas de Europa y Sudamérica. Posteriormente, de forma específica, se trata el papel de la emigración y la identidad social a partir del ejemplo del club brasileño Sociedade Esportiva Palmeiras.
Assessment of Groundwater Quality for Drinking Purposes Using Water Quality Index, and Identifying the Affecting Mechanism in Rashdiya, Central Iraq
Authors: Beg Ayad Ali Faris , Awadh Salih M. , Thamer Mohammed Bahjat , Al-Sulttani Ahmed H.
Published: June 2021

Groundwater is an important resource that can be used for various purposes. Various factors can change the chemistry of the GW, such as the chemical composition of an aquifer as well as the leaching of human waste into groundwater. The study area is a barren land covered by some sabkhas, in addition to some agricultural fields. The study aims to assess groundwater quality for drinking purposes using the Water Quality Index. The groundwater is chemically heterogeneous and has a wide quality range from very poor to excellent. Evaporation appears to be the controlling factor among the other shallow waters, while relatively deep water is related to rock-soil dominance. Rocks, land use and land cover have helped control the groundwater quality. Moreover, the heavy use of fertilizers, pesticides and irrigation, in addition to the presence of sabkhas, contributed to the deterioration of the groundwater quality. The water-rock interaction and evaporation are the dominant mechanisms that are controlling the groundwater quality in the study area.