bluuebunny/crossref_metadata_2025 huggingface dataset:
Sexual Differentiation and Substance Use: A Mini-Review
Authors: Harp Samuel J , Martini Mariangela , Lynch Wendy J , Rissman Emilie F
Published: August 2020

The organizational/activational hypothesis suggests that gonadal steroid hormones like testosterone (T) and estradiol (E2) are important at 2 different times during the lifespan when they perform 2 different functions. First steroids “organize” brain structures early in life and during puberty, and in adults these same hormones “activate” sexually dimorphic behaviors. This hypothesis has been tested and proven valid for a large number of behaviors (learning, memory, social, and sexual behaviors). Sex differences in drug addiction are well established both for humans and animal models. Previous research in this field has focused primarily on cocaine self-administration by rats. Traditionally, observed sex differences have been explained by the sex-specific concentrations of gonadal hormones present at the time of the drug-related behavior. Studies with gonadectomized rodents establishes an activational role for E2 that facilitates vulnerability in females, and when E2 is combined with progesterone, addiction is attenuated. Literature on organizational actions of steroids is sparse but predicts that T, after it is aromatized to E2, changes aspects of the neural reward system. Here we summarize these data and propose that sex chromosome complement also plays a role in determining sex-specific drug-taking behavior. Future research is needed to disentangle the effects of hormones and sex chromosome complement, and we propose the four core genotype mouse model as an effective tool for answering these questions.
Epidural Blood Patch for Postdural Puncture Headache in a Patient With Coronavirus Disease 2019: A Case Report
Authors: Norris Mark C. , Kalustian Albert , Salavati Seroos
Published: August 2020

The safety of epidural blood patch in patients with coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is unknown. Here, we report a single case of epidural blood patch to treat a postdural puncture headache in a woman after spinal anesthesia for cesarean delivery. The patient’s headache was relieved, and she did not develop any other neurological symptoms.
BMPR1A is necessary for chondrogenesis and osteogenesis, whereas BMPR1B prevents hypertrophic differentiation
Authors: Mang Tanja , Kleinschmidt-Doerr Kerstin , Ploeger Frank , Schoenemann Andreas , Lindemann Sven , Gigout Anne
Published: August 2020

BMP2 stimulates bone formation and signals preferably through BMP receptor (BMPR) 1A, whereas GDF5 is a cartilage inducer and signals preferably through BMPR1B. Consequently, BMPR1A and BMPR1B are believed to be involved in bone and cartilage formation, respectively. However, their function is not yet fully clarified. In this study, GDF5 mutants with a decreased affinity for BMPR1A were generated. These mutants, and wild-type GDF5 and BMP2, were tested for their ability to induce dimerization of BMPR1A or BMPR1B with BMPR2, and for their chondrogenic, hypertrophic and osteogenic properties in chondrocytes, in the multipotent mesenchymal precursor cell line C3H10T1/2 and the human osteosarcoma cell line Saos-2. Mutants with the lowest potency for inducing BMPR1A–BMPR2 dimerization exhibited minimal chondrogenic and osteogenic activities, indicating that BMPR1A is necessary for chondrogenic and osteogenic differentiation. BMP2, GDF5 and the GDF5 R399E mutant stimulated expression of chondrogenic and hypertrophy markers in C3H10T1/2 cells and chondrocytes. However, GDF5 R399E, which induces the dimerization of BMPR1B and BMPR2 more potently than GDF5 or BMP2, displayed reduced hypertrophic activity. Therefore, we postulate that stronger BMPR1B signaling, compared to BMPR1A signaling, prevents chondrocyte hypertrophy and acts as a cartilage stabilizer during joint morphogenesis.

This article has an associated First Person interview with the first author of the paper.
Differential effects of early growth conditions on colour-producing nanostructures revealed through small angle X-ray scattering (SAXS) and electron microscopy
Authors: Janas Katarzyna , Łatkiewicz Anna , Parnell Andrew , Lutyk Dorota , Barczyk Julia , Shawkey Matthew D. , Gustafsson Lars , Cichoń Mariusz , Drobniak Szymon M.
Published: August 2020

The costs associated with the production and maintenance of colour patches is thought to maintain their honesty. Although considerable research on sexual selection has focused on structurally coloured plumage ornaments, the proximate mechanisms of their potential condition-dependence, and thus their honesty, is rarely addressed, particularly in an experimental context. Blue tit (Cyanistes caeruleus) nestlings have UV-blue structurally coloured tail feathers, providing a unique opportunity for investigation of the causes of variation in their colour. Here, we examined the influence of early growing conditions on reflectance and structural properties of UV-blue coloured tail feathers of blue tit nestlings. We applied a two-stage brood size manipulation to determine which stage of development more strongly impacts the quality of tail feather colouration and microstructure. We used small angle X-ray scattering (SAXS) and electron microscopy to characterize nano- and micro-scale structure of tail feather barbs. Nestlings from the broods enlarged at a later stage of growth showed a sex-specific rectrix development delay, with males being more sensitive to this manipulation. Contrary to predictions, treatment affected neither the quality of the barb's nanostructures nor the brightness and UV chroma of feathers. However, at the micro-scale, barb's keratin characteristics were impaired in late-enlarged broods. Our results suggest that nanostructure quality, which determines UV-blue colour in tail feathers, is not sensitive to early rearing conditions. Furthermore, availability of resources during feather growth seems to impact the quality of feather microstructure more than body condition, which is likely determined at an earlier stage of nestling growth.
Exercise Is Medicine? The Cardiorespiratory Implications of Ultra-marathon
Authors: Tiller Nicholas B. , Stewart Glenn M. , Illidi Camilla R. , Levine Benjamin D.
Published: August 2020

Regular physical activity decreases the risk of cardiovascular disease, type II diabetes, obesity, certain cancers, and all-cause mortality. Nevertheless, there is mounting evidence that extreme exercise behaviors may be detrimental to human health. This review collates several decades of literature on the physiology and pathophysiology of ultra-marathon running, with emphasis on the cardiorespiratory implications. Herein, we discuss the prevalence and clinical significance of postrace decreases in lung function and diffusing capacity, respiratory muscle fatigue, pulmonary edema, biomarkers of cardiac injury, left/right ventricular dysfunction, and chronic myocardial remodeling. The aim of this article is to inform risk stratification for ultra-marathon and to edify best practice for personnel overseeing the events (i.e., race directors and medics).
Hemolytic Uremic syndrome associated with pregnancy: Outcome from acute Kidney Injury
Authors: Naqvi Rubina
Published: August 2020

Objective: To report here, case series of women developing acute kidney injury (AKI) in association with hemolytic uremic syndrome (HUS) during pregnancy or within days postpartum.

Methods: Subjects for the study reported here comprised of a cohort of 49 women referred from OBGYN and diagnosed having AKI and HUS. AKI was defined according to RIFLE criteria and HUS on basis of hematological, biochemical and histological features. All patients had normal size kidneys on ultrasonography and no previous co- morbidity.

Results: From January 2000 – January 2020, 49 such women were admitted/ referred to this facility. The mean age of these patients was 29.02±5.258 years. Two had HUS during pregnancy while rest during postpartum. Majority of women had more than one insults these include hemorrhages, intrauterine deaths, operative measure (lower segment caesarean section). Renal replacement was required in all women. Complete renal recovery was observed in 14 patients, while one died during acute phase of illness. CKD-V developed in 17 patients, 16 patients lost long term follow up, but were dialysis free till last follow up and one left against medical advice during acute phase of illness. Treatment with plasmapheresis revealed significantly better renal recovery (p value 0.03) in this group of patients.

Conclusion: AKI with background of Hemolytic Uremic Syndrome (HUS) may remain irreversible in many of these young women. Plasmapheresis should be offered to patients with established diagnosis of HUS.

doi: https://doi.org/10.12669/pjms.36.6.2931

How to cite this:Naqvi R. Hemolytic Uremic syndrome associated with pregnancy: Outcome from acute Kidney Injury. Pak J Med Sci. 2020;36(6):1153-1157. doi: https://doi.org/10.12669/pjms.36.6.2931

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Provision of the levonorgestrel intrauterine system in Nigeria: Provider perspectives and service delivery costs
Authors: Brunie Aurélie , Rademacher Kate H. , Nwala Anthony Adindu , Danna Kendal , Saleh Mariya , Afolabi Kayode
Published: August 2020

Background: Several organizations in Nigeria are leading pilot introduction programs of the levonorgestrel intrauterine system (LNG-IUS). We conducted a qualitative assessment of providers’ experiences across the five programs and an analysis of service delivery costs in one program.

Methods: We conducted 20 in-depth interviews (IDIs) with providers. We used project expenditure records to estimate incremental direct service delivery costs of introducing the LNG-IUS in 40 social franchise clinics supported by the Society for Family Health (SFH). We then compared the direct service delivery costs per couple years of protection (CYP) for the LNG-IUS to other family planning methods.

Results: Providers appreciated the therapeutic benefits of the LNG-IUS, especially reduction of heavy bleeding. They said that women generally accepted bleeding changes with counseling but noted complaints about spotting and mixed acceptability of amenorrhea. Providers indicated being comfortable with both the insertion and removal process and believed their equipment and infection prevention protocols were adequate. Lack of awareness among women, limited availability, current pricing, and resistance to uterine placement among some women were perceived as barriers. The estimated direct service delivery cost of introducing the LNG-IUS in pilot settings, inclusive of up-front provider training costs, was USD 34 per insertion. Direct service delivery costs at a ‘steady state’ (i.e., without training costs included for any method) of the LNG-IUS per CYP was similar to that of other contraceptive methods distributed in Nigeria.

Conclusion: Providers’ positive experiences with the LNG-IUS and direct service delivery costs per CYP that align with those for other methods suggest that the LNG-IUS could be an important addition to the method mix in Nigeria. Product introduction strategies will need to address both the supply and the demand sides, as well as consider appropriate pricing of the LNG-IUS relative to other methods and particularly the copper IUD.
Modelling the spread of Corona virus
Authors: Kenath Arun , OV Kiren , C Sivaram
Published: August 2020

The Corona virus has in a very short span wreaked havoc on a global scale. While efforts are on to develop a vaccine against the virus, the best course of action till then is to practice good hygiene and social distancing. In this work, we discuss some quantitative models for the spread of such viruses. These models imply that ‘social distancing’, i.e. a spatial separation of one to two metres between individuals could curtail the rate of spread by increasing the time scale for propagation. We also model the growth, flattening and decay of the curve and these models match with those observed in various regions (countries).
Ergatandromorphism in the Ant Myrmica lobulicornis Nylander, 1857 (Formicidae: Myrmicinae)
Authors: Schifani Enrico , Castracani Cristina , Spotti Fiorenza Augusta , Giannetti Daniele , Ghizzoni Martina , Gobbi Mauro , Pedrotti Luca , Grasso Donato Antonio
Published: August 2020

Ergatandromorphism is the result of an aberrant development in which part of the body of a social insect shows the traits of the worker caste, while the other resembles a male. It is considered a specific case of gynandromorphism. Specimens with these characteristics have rarely been collected in different ant lineages across the world. Here, we provide the first description of ergatandromorphism in the ant Myrmica lobulicornis Nylander, 1857: an ergatandromorphous specimen was recovered during an arthropod sampling campaign across altitudinal and ecological gradients on the Italian Alps (Stelvio National Park), together with 480 workers and 4 queens of the same species, which expressed the normal phenotype.
Cavity quantum electrodynamics with color centers in diamond
Authors: Janitz Erika , Bhaskar Mihir K. , Childress Lilian
Published: August 2020

Coherent interfaces between optical photons and long-lived matter qubits form a key resource for a broad range of quantum technologies. Cavity quantum electrodynamics (cQED) offers a route to achieve such an interface by enhancing interactions between cavity-confined photons and individual emitters. Over the last two decades, a promising new class of emitters based on defect centers in diamond has emerged, combining long spin coherence times with atom-like optical transitions. More recently, advances in optical resonator technologies have made it feasible to realize cQED in diamond. This article reviews progress towards coupling color centers in diamond to optical resonators, focusing on approaches compatible with quantum networks. We consider the challenges for cQED with solid-state emitters and introduce the relevant properties of diamond defect centers before examining two qualitatively different resonator designs: micrometer-scale Fabry–Perot cavities and diamond nanophotonic cavities. For each approach, we examine the underlying theory and fabrication, discuss strengths and outstanding challenges, and highlight state-of-the-art experiments.
X-ray phase tomography with near-field speckles for three-dimensional virtual histology
Authors: Zdora Marie-Christine , Thibault Pierre , Kuo Willy , Fernandez Vincent , Deyhle Hans , Vila-Comamala Joan , Olbinado Margie P. , Rack Alexander , Lackie Peter M. , Katsamenis Orestis L. , Lawson Matthew J. , Kurtcuoglu Vartan , Rau Christoph , Pfeiffer Franz , Zanette Irene
Published: August 2020

High-contrast, high-resolution imaging of biomedical specimens is indispensable for studying organ function and pathologies. Conventional histology, the gold standard for soft-tissue visualization, is limited by its anisotropic spatial resolution, elaborate sample preparation, and lack of quantitative image information. X-ray absorption or phase tomography have been identified as promising alternatives enabling non-destructive, distortion-free three-dimensional (3D) imaging. However, reaching sufficient contrast and resolution with a simple experimental procedure remains a major challenge. Here, we present a solution based on x-ray phase tomography through speckle-based imaging (SBI). We demonstrate on a mouse kidney that SBI delivers comprehensive 3D maps of hydrated, unstained soft tissue, revealing its microstructure and delivering quantitative tissue-density values at a density resolution of better than

2

m
g

/

c
m

3

and spatial resolution of better than 8 µm. We expect that SBI virtual histology will find widespread application in biomedicine and will open up new possibilities for research and histopathology.
Dispersion-engineered T-type germanium waveguide for mid-infrared supercontinuum and frequency comb generations in all-normal dispersion region
Authors: Lai Jintao , Yuan Jinhui , Cheng Yujun , Mei Chao , Zhou Xian , Wu Qiang , Yan Binbin , Wang Kuiru , Long Keping , Yu Chongxiu , Sang Xinzhu
Published: August 2020

In this paper, a T-type germanium (Ge) waveguide with an all-normal dispersion profile is designed for mid-infrared (MIR) supercontinuum (SC) and frequency comb generations. The nonlinearity coefficient of the designed waveguide is calculated as 30.48 W-1·m-1 at the initial pump wavelength of 3.0 µm. Moreover, the group-velocity dispersion is kept low and flat in the considered wavelength range. Simulation results show that with the designed waveguide, the highly coherent and octave-spanning MIR SC can be generated in the wavelength range from 1.85 to 9.98 µm (more than 2.4 octaves) when the pump pulse with wavelength of 3.0 µm, peak power of 900 W, and duration of 120 fs is launched into the 5 mm long waveguide. When the pulse train including 50 pulses at a repetition rate of 100 MHz is used as the pump source, the SC-based frequency comb is obtained.
I verbi di servizio (modali, aspettuali e causativi) e i verbi supporto nelle grammatiche descrittive d’italiano dal 1953 al 2005
Authors: Godzich Anna
Published: August 2020

The paper deals with Italian helping verbs (modal, aspectual, causative verbs) and light verbs which form complex predicates and with the rules that guide its use in Italian descriptive grammars published in Italy between 1953 and 2005. The author shows that those forms in both – traditional and contemporary Italian descriptive grammars are treated at the level of word classes whereas it could be more appropriate to discuss them as clause elements as they form complex predicates. In our opinion this way of describing such verbs is due to the tradition in Italy to focus on a form and not on function of an element. What is more, Italian grammarians tend to omit in Italian descriptive grammars noun predicationand the role of semantic predicate (n pred.). The goal of the paper is to present the advantages of an integrated approach to helping verbs (modal, aspectual, causative verbs) and light verbs in modern Italian. The author emphasizes its importance for contemporary Italian FL syntax teaching.
La pronuncia italiana per i giovani apprendenti sloveni: che cosa ne dicono i dizionari?
Authors: Grošelj Robert
Published: August 2020

The article deals with the representation of Italian pronunciation in five contemporary dictionaries for young Slovenian learners. As the use of a dictionary not only stimulates the development of lexical competence, but can also serve as a useful means for pronunciation learning, the article investigates five categories representing phonetic-phonological features in a dictionary: introduction to phonetics/phonology (e.g. a pronunciation guide), phonetic transcription, phonemes, consonant length and accent. The representation of these features in a dictionary for young learners should be clear and coherent, and in some cases a dictionary (especially a dictionary intended for the youngest users) should also featureaudio pronunciations. The five dictionaries analysed are fragmentary with regard to the pronunciation: only one dictionary includes audio recordings (although the relation between the spelling and the pronunciation remains unclear, as it does not include a pronunciation guide); two dictionaries include deficient phonological transcriptions and incomplete pronunciation guides; one dictionary contains only the Italian alphabet with corresponding phonemes, while another dictionary is without any elements that could familiarize a Slovenian learner with Italian pronunciation.
Observational study of SARS-CoV-2 antibody immune response in a cohort of patients at a North Suburban Chicago, Illinois, in a physician’s practice
Authors: Osher Gerald , Lamb Christopher C. , Ibarra Yuliana , Erickson-Samson Deborah
Published: August 2020

Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a global pandemic. The application of point of care serological testing can help determine past infection and assist healthcare workers assess patient risk.

Method: An observational study of 114 subjects in North Suburban Chicago, Illinois, was performed using the Clungene® lateral flow immunoassay (LFI). Patients’ PCR test results and clinical symptoms were used to compare the seroconversion rate of this patient population with the surrounding community.

Results: Excluding 1 aberrant result, there was 100% positive agreement (10) between PCR and antibody (IgG or IgM) test results. There were 7 patients who did not have a prior PCR test who were positive for IgG; 5 of the 7 had clinical symptoms consistent with possible exposure and 2 were asymptomatic. There was 1 person with a suspected exposure to an infected person who was IgM positive. Ninety-five asymptomatic patients were seronegative. The overall rate of 15.9% seroconversion (IgG or IgM) is consistent with other community-based testing results in the North Suburban Chicago, Illinois area.

Conclusion: Rapid screening tests to identify antibody positive patients recovered from coronavirus disease-2019 can be a useful tool for healthcare professionals to determine or confirm past infection.

Statement of novelty: Limited data is available on the use of point of care serological testing to assist healthcare professionals with the assessment of their patient population regarding past SARS-CoV-2 infectivity and seroconversion. The present study successfully investigated the use of a point of care antibody test in a physician’s office to determine which patients have developed antibodies, indicating an immune response to SARS-CoV-2, and to assist with decisions on whether patients should pursue normal social and workplace activities.
Pharmacotherapy management for hospitalized ischemic stroke patients
Authors: Al-Temimi Ahmed Alaa , Hua Gan Siew , Shalin Selvaraj Christine
Published: August 2020

Background: Worldwide, cerebrovascular accident (stroke) is the second leading cause of death and is the third leading cause of disability. Sadly, stroke prevalence in the low- and middle-income countries remains high (70%) with both stroke-related deaths and disability-adjusted life years reported to be as high as 87%.

Aim: The objective of this study is to evaluate the success of pharmacotherapy management strategy for Malaysian stroke patients in a public hospital based on the Clinical Practice Guidelines (CPG), 2012. 

Methods: A retrospective, cross-sectional study based on medical records of patients (n=682) with confirmed diagnoses of ischemic stroke admitted to Sungai Buloh Hospital for four years was conducted. Data was collected using self-developed data collection forms consisting of demographic profiles, comorbidity and pharmacotherapy treatment. 

Results: The mean age of reported cases was 66.66 years with the majority (58%) being males while only 42% were females. The majority (>72%) adhered to the pharmacotherapy management of Clinical Practice Guideline Malaysia 2012 for ischemic stroke inpatients setting in a public hospital (p=0.001). 

Conclusion: Most patients complied to the pharmacotherapy management of ischemic stroke guideline which is important to avoid disability and mortality caused by stroke.
Knowledge
Authors: Ricciulli David
Published: August 2020

Knowledge
PERCEPCIÓN DE MARCA DE MEDICAMENTOS GENÉRICOS FRENTE A ORIGINALES EN PACIENTES CON HIPERTENSIÓN ARTERIAL PULMONAR EN COLOMBIA.
Authors: Alfonso Iannini Silvana
Published: August 2020

La presente investigación tiene como objetivo establecer percepción de marca presente en un grupo de pacientes con hipertensión arterial pulmonar, frente al uso de medicamentos de marcas genéricos y originales  en el sector farmacéutico en la ciudad de Bogotá. Se buscará analizar las percepciones generales de esta población en torno al uso y tratamiento con medicamentos originales de marca frente a la eficacia de los medicamentos genéricos; evaluando los niveles de  confianza, uso, selección y referenciacion de estos fármacos. La estrategia metodológica que se propondrá será de carácter cuantitativo y se implementará un análisis descriptivo transversal. 
El valor percibido de operadores logísticos por parte de empresas ubicadas en zonas francas.
Authors: Zapata Vargas Diego Armando
Published: August 2020

El estudio del valor percibido es un tema de especial interés para el marketing a nivel empresarial. En este sentido, conocer la percepción de los beneficios y costos que tienen los empresarios respecto a pertenecer a un territorio específico con auxilios tributarios ofrece información importante para la producción y comercialización de bienes y servicios, administrados por operadores logísticos en Bogotá, logrando promover el desarrollo económico de la región. Para tal fin, se ha propuesto desarrollar un estudio exploratorio descriptivo basado en el diseño e implementación de entrevistas con empresarios para una posterior medición con una encuesta.

 
Working paper respecto a la relación entre las actividades promocionales sobre la imagen la marca de producto e intención de compra aplicado a la categoría de electrodomésticos
Authors: Quintero Rueda Jose Luis
Published: August 2020

Resumen

Entendiendo que el presente documento constituye un "Working Papers" cuyo propósito es alojar el avance de los proyectos de investigación desarrollados en la Maestría de la IUPG , bajo la categoría de "literatura gris" proyectado a un artículo publicable en revista indexada, el resumen de este documento consiste en: analizar la influencia de las actividades promocionales en el sector de la compra de marcas de electrodomésticos, particularmente sobre la imagen de marca y la intención de compra de las personas de los estratos 2,3 y 4 de la ciudad de Bogotá. Se profundiza en el concepto de actividad promocional en esta categoría, analizando la relación desde la perspectiva teoría a la perspectiva practica de actividad promocional. Se espera que este estudio sirva a los practicantes y académicos del marketing, ofreciendo información respecto al papel de las actividades promocionales frente al diseño, desarrollo e innovación de producto en el ámbito de la imagen de marca y la intención de compra.

Palabras clave: Actividades promocionales, imagen de marca, intención de compra.

Abstract

Understanding that the present document constitutes a Working Papers whose purpose is to accommodate the progress of the research projects developed in the IUPG Masters, under the category of "gray literature" projected to an article published in indexed journal, the summary of This document consists of: analyzing the influence of promotional activities in the sector of the purchase of household appliances brands, particularly on the brand image and the purchase intention of the people of strata 2, 3 and 4 of the city of Bogota . The concept of promotional activity is deepened in this category, analyzing the relationship from the theory perspective to the practical perspective of activity

Key words: Promotional activities, purchase intention, purchase decision, brand perception.
Post-mortem of the Kerala floods 2018 tragedy
Authors: Ghosh Pritha
Published: August 2020

After more than two weeks of relentless rain, in early August, 2018, Kerala, often referred as ‘God’s own country’ a State at the southern tip of India, known internationally for its scenic green landscapes, tourists spots and backwaters, is left with over 1 million
people in relief camps and close to 400 reported dead- the number expected to be much higher as many areas remain inaccessible. The coastal strip wedged between the Arabian Sea and the Western Ghats mountain chain is prone to inundation. Unusually heavy monsoon rains have got the entire State
of Kerala in the grip of a massive, unprecedented flood: the last time anything like this has happened was in 1924. Even before the rains, Kerala’s economy presented a mixed picture: relatively higher per capita income, but slow growth and high unemployment rates. As torrential rains
abated in Kerala, the major question confronting the State and its unfortunate citizens is an assessment of the colossal loss of property, agriculture and infrastructure and the focus has turned towards the short-term negative implications and how will it rebuild its economy. There were evidently
many political, economic, social and managerial lessons to take away from the disaster. The paper will describe the magnitude of the disaster in Kerala and the impact on the human population.
Electronic and magnetic structure of Sr2Fe3S2O3: a 2-D AFM spin ladder system
Authors: Khanam Dilruba , Iqbal Asif , Rahaman Badiur
Published: August 2020

Electronic structure calculation has been carried out for quantum spin system Sr2Fe3S2O3 with an aim to figure out the underlying spin model. We present first-principles density functional calculation to study the electronic and magnetic properties
of Sr2Fe3S2O3. We discuss explicitly the nature of the exchange paths and provide quantitative estimates of magnetic exchange couplings. A microscopic modelling based on analysis of the electronic structure of this system puts it in the interesting
class of 2-D antiferromagnetic spin S=2 ladder system
Parametric Study of MIG Welding on Mild Steel (IS-2062 GRADE 2)
Authors: Banerjee Akanistha , Neogy Arna , Da Dyuman , De Dwaipayan
Published: August 2020

Metal Inert Gas (MIG) welding is a widely employed arc welding process that uses a consumable metal electrode to produce the weld. MIG welding produces very good quality weld when compared to other welding technologies with precise welding and comparatively little heat affected zone.
MIG welding has become a popular choice of welding processes when high quality, precision welding is required at a comparatively lower cost. MIG welding is dependent on various input parameters but in the present work input parameters selected were welding current and weld time because these
are the two major parameters which affect the weld quality. MIG welding finds its greatest application in welding both ferrous and non-ferrous metals and thus the most widely used arc welding process. A Taguchi Method (2 factors 3 levels) Design of Experiment (DOE) has been applied in this
context to examine different welding defects through various tests like Hardness, Ultrasonography, Dye Penetration Test and tensile testing to examine its effect in each case. Finally using the Taguchi results have been optimized and through experiments and testing the best alternative with
minimum welding defects and maximum yield strength and hardness number is reported successfully in the present work.
Charging Of SmartPhone Through Self-Generated Heat
Authors: Mukherjee Arishmita , Roy Aritra , Sen Arvil , Mukherjee Audrish
Published: August 2020

In this age of highly memory intense applications and increasing size of Random Access Memory (RAM), mobile Central Processing Unit (CPU) temperatures are bound to reach high values; the range can even extend up to 48 degree Celsius. In that case, it would only be logical to try and
harvest that heat energy, which could help in the phone’s performance by actually cooling the device down and simultaneously it can be charged through converting this heat energy into electrical energy. When mobile phones are being charged by motion as well, heat should not be left behind
because it is one of the most thermodynamically underappreciated sources of energy. In this paper, a Peltier Module has been used to capture heat from the CPU or the surroundings to generate a voltage that will supply power to the battery. The advantages of this method includes that a phone
can be charged at anyplacewhere no power source is available. The only disadvantage in this method would be a low efficiency, because heat itself is of very low quality energy source.
Molecular dynamics simulations to see the effect of temperature and pressure change on the dynamics of protein
Authors: Yadav Osheen , Negi Sunita
Published: August 2020

In this work we study the effect of temperature and pressure on the dynamics of calmodulin protein using molecular dynamics simulations. The calmodulin protein is used for this study as a first step which can be extended further to other proteins. Calmodulin is a calcium binding protein
and thus plays a very important role in the transport of calcium ions inside the cell. The temperature is earlier reported to play an important role in the dynamics of this protein which is applicable to the other proteins as well. In this study we therefore study the combined effect of temperature
and pressure on the conformation change of this protein. The pressure alone is not observed to play a significant role in the dynamics of the protein whereas pressure along with temperature is observed to change the conformation of the protein to a large extent. The results were confirmed
with the molecular dynamics simulations performed with the help of NAMD software. These results are consistent with the experimental results of the other workers performed with fourier transform infrared spectroscopy. Temperature is observed to pave pathways to expand/unfold the whole protein
structure making it more susceptible to the effects of pressure.
Análise de satisfação e desempenho dos serviços e produtos ofertados em uma empresa do setor agrícola
Authors: Felipe Schaedler Gustavo , Anita Walter Silvana , Manzano Brenzan Cinara Kottwitz , Luiz Soares Mário
Published: August 2020

O presente artigo tem como objetivo a identificação de oportunidades de melhoria na satisfação de clientes de uma empresa do setor agrícola localizada nodistrito de Novo Sarandi, Oeste do Paraná (Brasil), através do uso conjunto de dois métodos de análise, sendo eles: Modelo Kano e a Matriz de Importância X Desempenho; objetivando analisar o grau de satisfação e importância dos serviços prestados, permitindo uma melhor identificação dos atributos prioritários para melhoria. Para mensuração da satisfação utilizou-se uma pesquisa quantitativa descritiva, por meio de um questionário contendo 18 atributos, aplicado com 100 clientes fixos ou eventuais, que aceitaram respondê-lo. Constatou-se que a média de Satisfação Geral é mediana e que os clientes possuem nível Atrativos e Unidimensionais em relação a melhoria de produtos. Os atributos atrativos apresentam maior impacto na satisfação se melhorados do que insatisfação se piorados, sendo: aparência dos funcionários; aparência externa e aparência interna da empresa. Destaca-se pela análise dos dados, que a empresa atende as expectativas dos consumidores em alguns atributos, sendo que, dos 18 atributos avaliados, é necessário oportunizar a melhoria com mais atenção em cinco deles: agilidade no recebimento de produtos; preço dos produtos; descontos em relação aos produtos no pagamento a vista;  isponibilidade de estoque e prontidão no atendimento; considerados atributos de alta importância ao cliente, mas com baixo nível de desempenho.
Dönüşümsel Seyahat: Kaçkar Dağları Milli Parkı Örneği
Authors: ÖZÇELİK Özer Mesut , ÖMÜRİŞ Ece
Published: August 2020

Seyahate dayalı deneyimler bireylerin bilgi, tutum ve davranışlarında değişimlere yol açabilmektedir. Dönüşümsel seyahat turistlerde dönüşüme yol açabilen öğrenme ve kişisel gelişim gibi motivasyonlarla gerçekleştirilen seyahatleri ifade etmektedir. Bu çalışmanın amacı Kaçkar Milli Parkı’na seyahat eden bireylerin seyahat sonucunda edindikleri dönüşümü anlamaya çalışmaktır. Dönüşümsel Öğrenme Kuramı’na (Mezirow 1978) dayalı olarak geliştirilen bu çalışmada fenomenoloji yaklaşımı kullanılmıştır. Kaçkar Dağları Milli Parkı’nı ziyaret etmiş̧ 16 katılımcıyla yapılan mülakatlarla zengin ve derin veri sağlanmıştır. Katılımcıların seyahatleri sonucunda çevresel farkındalık, davranışsal değişim, kendini gerçekleştirme, kişisel gelişim, sosyal ve kültürel değişim, sağlık ve iyi oluş̧ ve toplumsal fayda geliştirdikleri bulgulanmıştır. Çalışmada, Kaçkar Dağları Milli Parkı’nın dönüştürücü potansiyeli ile ilgili ipuçları elde edilerek ileriki çalışmalara yol gösterebilecek öneriler ortaya konmuştur. Ayrıca bu çalışma, seyahatin bireyler üzerindeki dönüştürücü gücünü Kaçkar Dağları Milli Parkı özelinde tespit ederek, ulusal alanyazınını genişletme niteliğindedir.
Finansal ve Finansal Olmayan Verilerle Menü Performansının Değerlendirilmesi
Authors: YİĞİTOĞLU Vedat , TETİK Nilüfer
Published: August 2020

Bu çalışmada yiyecek menü kalemlerinin performansının finansal ve finansal olmayan verilerle etkin bir şekilde ortaya koyulması amaçlanmıştır. Bu amaçla Antalya’da bulunan lüks bir restoran işletmesinin 30 adet yiyecek kaleminden oluşan akşam yemeği menüsü örnekleminde bir araştırma yapılmıştır. Bir aylık faaliyet dönemini kapsayan araştırma verileri; yüz yüze görüşme, belge inceleme ve görsel kayıt teknikleri kullanılarak toplanmış ve girdi odaklı Veri Zarflama Analizi ile analiz edilmiştir. Yapılan analiz sonucunda, menü kalemlerinin büyük bir kısmının (16’sının) etkin olduğu belirlenmiştir. Ancak etkin olan menü kalemlerine menü grupları bazında bakıldığında, en az sayıda ana yemek grubunda yer alan yiyeceklerin (ikisinin) etkin olduğu anlaşılmıştır. Bu sonuç, işletme yönetiminin özellikle ve öncelikle ana yemek grubunda yer alan yiyecekler üzerinde odaklanması gerektiğini göstermektedir. Çalışmada mevcut yazından farklı olarak ilk defa yiyecek tüketimi önemli bir çıktı değişkeni olarak kullanılmıştır. Böylece menü değerleme sürecine işletmeyle birlikte konuk bakış açısı da dâhil edilmiş ve daha kapsamlı sonuçlar elde edilmiştir.
DESENHO GEOMÉTRICO E GRAFISMO TUPINAMBÁ EM OLIVENÇA, ILHÉUS, BA, BRASIL: ANÁLISE PRELIMINAR
Authors: Silva João Vitor Morais da , Costa Silvia Kimo
Published: August 2020

Este artigo apresenta os resultados do plano de trabalho de pesquisa: “Análise preliminar da geometria no graﬁsmo produzido pela comunidade Tupinambá” localizada no distrito de Olivença, município de Ilhéus, BA e vinculado à pesquisa-ação “Arquitetura Vernacular habitacional como expressão ambiental e cultural no Litoral Sul da Bahia” que vem sendo desenvolvida desde 2016. As atividades pautaram-se no protocolo de aprovação Conep 2.552.460/2018. O plano de trabalho objetivou registrar e analisar o graﬁsmo quanto à geometria implícita e explícita em sua composição. Tal “idioma-código” vem sendo expresso por meio da pintura corporal e “impresso” nas paredes das habitações vernaculares. Os dados foram coletados entre dezembro de 2018 e abril de 2019, por meio da observação participante e desenhos de observação do graﬁsmo. A composição gráﬁca foi analisada considerando princípios da geometria plana e não plana a ﬁm de identiﬁcar as ﬁ guras geométricas, fractais, sua disposição/ organização quanto à simetria, rotação, translação e os algoritmos geométricos. Os resultados mostraram que a composição gráﬁca considera o contexto geográﬁco e biodiversidade onde a comunidade indígena está inserida e carrega elementos gráﬁcos resultantes da “etnogênese” e reelaboração cultural reforçando a identidade étnica Tupinambá. Dentre as principais formas geométricas identiﬁcadas, durante a análise, predominam: os círculos, os quadrados, os losangos, os triângulos, as linhas retas e onduladas. A composição gráﬁca apresenta simetria a partir de um eixo central e propriedades de rotação e translação. Já os algoritmos geométricos, fractais, foram constatados no conjunto de formas que se torna o elemento gráﬁco que se repete em maior ou menor escala.
Factors of soil and atmospheric air degradation and their influence on the state of plants in urban and suburban ecosystems
Authors: Larionov Maxim V. , Larionov Nikolai V. , Gromova Tatyana S. , Siraeva Irina S. , Ermolenko Anna S. , Volodkin Aleksey A. , Levkina Galina V.
Published: August 2020

This paper presents data on characteristics and extent of degradation of soil quality, atmospheric air and plants in urban and suburban areas of the Lower and Middle Volga region, Central Chernozem region. The goal of the research is to analyze and present data of environmental monitoring of soil, atmosphere and plants. On the example of the Saratov, Voronezh and Penza Regions, the values of the state of terrestrial ecosystems on different types of soils are established. The predominant position in terms of area and economic use is occupied by soils transformed in the course of urban development, as well as artificial soils. Compaction, anthropogenic inclusions, littering and heavy metal contamination are of great importance in the degradation of the soil cover. In the air-technogenic pollution, the formation and deposition of dust on the leaf surface of plants plays a significant role. Bioindicative signs in the analysis of the state of the environment and ecological systems were indicators of the viability, condition and stability of trees and shrubs. They are obtained based on average data from the research and subsequent assessment of life status. Separately, the indicators of degradation of woody plants assimilation organs depending on the levels of unfavorable soil-ecological and aerogenic conditions in urban and suburban ecosystems of the studied regions are considered. The significance of degradation of environmental objects by analyzed anthropotechnogenic factors is reflected in the correlation analysis results.
The determination of the nitrogen-containing ions concentrations dynamics in the oxbow of Ishimchik to assess the impact of 2016–2017 floods
Authors: Novik Anastasia A. , Shavnin Aleksey A.
Published: August 2020

This paper presents the results of the ecological state study of oxbow Ishimchik, located in Ishim, Tyumen Region. The paper presents data on the nitrogen-containing ions concentrations dynamics in water samples of oxbow Ishimchik over the summer-autumn of 2017, the content of which is an important indicator of the water chemical composition. The presence of nitrate ions, nitrite ions and ammonia in high concentrations in the samples usually indicates that the reservoir suffers from contamination by household, agricultural and industrial waste. In 2016 and 2017 a large amount of water from heavy floods came to the oxbow, which could significantly increase the concentration of mineral forms of nitrogen. The main concern is the flood of 2016 as to stop the Ishim private sector flooding a channel was dug for discharge of floodwaters from the town-affected part into the oxbow. To determine the content of nitrogen-containing ions, the photometry method was used. The results of a chemical analysis show that the content of ammonium and ammonia cations (total), nitrite anions and nitrate anions is less than maximum permissible concentration as well as there is a change in the prevailing mineral form of nitrogen from redoxidized to oxidized.
Ecology and structure of Trifolium repens L. coenopopulations on the territory of Tatarstan
Authors: Prokhorenko Nina B. , Kadyrova Luisa R. , Demina Galina V.
Published: August 2020

This paper deals with the morphological variability of plants as well as the composition and structure of Trifolium repens L. coenopopulations as a valuable honey plant, an agricultural plant and the plant which is used in medicine. This plant is rich with ascorbic acid, carotene, contains alkaloids, glycosides and other substances. T. repens coenopopulations with difference in density and structure are formed under the influence of ecological and coenotic conditions. Eleven T. repens coenopopulations in various landscape regions in the Republic of Tatarstan were analyzed. Environmental factors characterizing habitats, plant morphological status by 9 parameters, density and vitality structure of coenopopulations were investigated. The results showed that slightly acidic, fresh soils with an above average mineral content are formed in the subtaiga subzone. In the composition of the broad-leaved subzone, the degree of soil moisture decreases to fresh and periodically dry, the content of mineral nitrogen increases from average in the north to higher than the average in the south, soil acidity, on the contrary, decreases from slightly acidic to neutral. The habitat conditions that developed in the north of the broad-leaved subzone are most optimal for the development of T. repens coenopopulations, because plants in these conditions have the largest biomass parameters. This allows us to recommend collecting T. repens coenopopulations in the north of the broad-leaved subzone for medical purposes.
The use of Lapbook-technology in the organization of academic and professional interaction with students of a technical university in a foreign language
Authors: Odaryuk Irina V. , Kotliarenko Iuliia Yu.
Published: August 2020

Federal State Educational Standards for Higher Education of the third generation are aimed at achieving harmonization between the needs of modern production and the tasks set by higher educational institutions for the training of highly qualified specialists. The paper discusses the need to find and apply new, interactive teaching methods and technologies in the educational process of higher education institutions. To solve practical problems or problems in the process of teaching foreign languages, a project methodology is proposed that promotes an independent acquisition of knowledge and their integration from various subject areas. Lapbook technology as one of many design techniques appeals to the creative activity of students personality. The main provisions of this technology are analyzed as a means of complex development of all types of speech activity in academic and professional interaction with students of a technical university in a foreign language. Characteristics (goal, tasks, developed competencies), basic parameters of students activities are described, an approximate structure for the development of subject and meta-subject skills at the stages of the lesson is developed. The development and application of training sessions using Lapbook technology in the framework of teaching a foreign language in higher educational institutions will undoubtedly contribute to the achievement of the tasks set by the new Federal State Educational Standards for Higher Education.
Blood flow condition in the left renal vein in operative treatment of patients with varicocele
Authors: Krupin Valentin N. , Uezdnyj Mihail N. , Zubova Svetlana Yu. , Petrova Polina I.
Published: August 2020

The purpose of the study was to evaluate the blood flow in the left renal vein after ligation of the internal spermatic vein with varicocele and to study the changing of the level of biological markers of acute kidney damage in these patients.

Materials and methods. Under observation were 64 men in age 1823 years with the first hemodynamic type of varicocele. In 3 patients clinically significant compression of the left renal vein was revealed and the remaining 61 patients underwent surgery by Ivanissevich approach. Before the operation, on the 2nd, 10th, 30th and 90th days after the operation patients underwent Doppler blood flow rate by ultrasound with color mapping of the left renal vein with measurement of venous blood flow velocity. During these periods all patients underwent laboratory tests, including the study of the content of cystatin C and interleukin 18 in the blood and urine.

Results. On the first day after ligation of the internal spermatic vein an increase in the concentration of biological markers of acute kidney damage in the blood and urine was noted. After surgery all patients showed an increase in the diameter of the left renal vein by 1.52 mm and a decrease in the linear blood flow velocity in the region of the renal vien by 56 cm/s. On the 10th day after the operation the diameter of the left renal vein was increasesd by 34 mm more and the linear blood flow velocity slows down by 22.5 cm/s. The restoration of blood flow velocity and the diameter of the left renal vein occurred within three months and in most cases returned to baseline and in 22.9% of patients recovery did not occur by the 90th day of observation.

Conclusion. Ligation of the internal spermatic vein with varicocele is accompanied by impaired blood flow in the left renal vein and an increase in the concentration of biological markers of acute kidney damage, which is a manifestation of venous hypertension and renal hypoxia. In most patients these indicators normalize to the 90th day of observation after surgery.