bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelos logísticos estocásticos: una revisión de la literatura
Authors: Martínez-Bernal Javier , Cuervo-Cruz Ricardo Andrés , Orjuela-Castro Javier Arturo 
Published: September 2021

El presente artículo se realiza con el objetivo de establecer el estado del arte de los modelos de localización, inventario y ruteo con parámetros estocásticos. Se realizó una revisión sistemática de la literatura en las bases de datos ScienceDirect, ScholarGoogle, SpringerLink, Scopus, SemanticScholar, Scielo y ResearchGate. A través de preguntas orientadoras, se seleccionaron 99 artículos, de los cuales el 74% es literatura reciente entre 2015 y 2019. Se clasificaron los modelos individuales logísticos estocásticos, se propuso una taxonomía con un enfoque de investigación de operaciones, a partir de sus características, parámetros, restricciones, funciones objetivo y métodos de solución utilizados. Asimismo, se identificaron las tendencias y las futuras líneas de investigación. Como conclusión se identifican nuevas estrategias y políticas operativas que permiten mejorar el desempeño de la cadena de suministro, igualmente la ausencia de métodos de solución eficientes ha sido evidente en grandes instancias, según la vida real.
A computer program for the application of Zoeppritz's amplitude equations and Knott's energy equations
Authors: Young G. B. , Braile L. W. 
Published: September 2021

abstract
A computer program is presented which calculates Zoeppritz's displacement amplitude coefficients, displacement potential coefficients, and Knott's energy coefficients for plane harmonic elastic waves of P or SV type incident on a plane interface between two isotropic, homogeneous elastic solids. A discussion of these three basic types of coefficients is included. Results of applying the program to a sample case are presented in the form of a graph of the energy coefficients computed for all possible wave types and over a range of angle of incidence of 0° to 90°.
Clinical correlates of plasma antithrombin and protein C levels in patients with pre-eclampsia and eclampsia in Sokoto, Northwest Nigeria
Authors: Musa Abubakar U. , Mamman Aisha I. , Panti Abubakar A. , Alhassan Abdul Wahab , Rabi'u Anas F. 
Published: September 2021

Background: Hypertensive disorders of pregnancy complicate 17% of pregnancies in Sokoto, Nigeria with pre-eclampsia and eclampsia accounting for 6% and 4.29% respectively. Pre-eclampsia and eclampsia stand out as major causes of poor pregnancy outcomes with eclampsia contributing 46% of adolescent maternal mortality in Sokoto. These disorders increase risk of venous thromboembolism, DIC, placental abruption, IUGR, premature delivery and recurrent pregnancy loss. The roles of antithrombin and protein C in disease severity and outcomes of pregnancies in pre-eclampsia/eclampsia are subject of recent researches albeit with conflicting findings. The aim of the study was to determine the plasma antithrombin and protein C levels of pre-eclampsia and eclampsia in Sokoto with a view to assessing any relationship with clinical severity and pregnancy outcomes.Methods: Prospective comparative study involving 31 each of pregnant women with pre-eclampsia, eclampsia and normotensive pregnancy. Plasma antithrombin and protein C levels were determined via kinetic method using S4 Nortek semi-automated coagulometer. Data analysis was performed using SPSS version 21.0. Results: The mean plasma antithrombin and protein C levels for eclampsia, pre-eclampsia and normotensive pregnancy were (61.17±9.13 and 60.00±5.76) vs (71.24±13.15 and 71.06±6.16) vs (85.54±8.77 and 89.64±7.61) respectively; p=0.0001. Severe pre-eclampsia when compared with mild pre-eclampsia had lower antithrombin (70.21±13.58 vs 73.74±12.43; p=0.507) and protein C (70.52±6.27 vs 72.40±6.00; p=0.451) levels respectively, though without statistical significance. Pre-eclampsia with low plasma antithrombin levels had increased risk of preterm delivery when age, gravidity and booking status were factored (OR, 1.2, 95% CI 0.035 to 0.348, p=0.017).Conclusions: Lower plasma antithrombin and protein C levels were found with eclampsia and severe pre-eclampsia suggesting consumptive depletion of anticoagulants with disease progression. Women with pre-eclampsia and low plasma antithrombin levels were found to have increased odds of having preterm delivery when age, gravidity and booking status were considered.
Role of ferric carboxymaltose in the treatment of postpartum anemia in a tertiary care hospital in Andhra Pradesh
Authors: Krishna Kirtan , Krishna Achint , N. Divya Teja G. 
Published: September 2021

Background: Postpartum iron deficiency anemia is common in India as a consequence of postpartum hemorrhage. Recent studies have evaluated the use of parenteral iron as a better tolerated treatment modality. Compared with oral iron supplements, parenteral iron is associated with a rapid rise in serum ferritin and hemoglobin and improved maternal fatigue scores in the postpartum period. Parenteral iron may be considered for the treatment of postpartum anemia. The objective of the study was to evaluate the efficacy, safety, and tolerability of intravenous ferric carboxymaltose, in women with postpartum anemia.Methods: A clinical observational study was undertaken in a tertiary care hospital, 50 women within six weeks of delivery with Hb ≥6 gm/dl and ≤10 gm/dl received 1000 mg/week, over 15 minutes or less, repeated weekly to a calculated replacement dose (maximum 2500 mg) . Hemoglobin and serum ferritin levels were recorded prior to treatment and on day 21 after completion of treatment.Results: Ferric carboxymaltose-treated subjects achieved a hemoglobin greater than 12 gm/dL in a short time period (21 days), achieve a hemoglobin rise of ≥3 gm/dL more quickly, and attain higher serum ferritin levels. It is also associated with better patient compliance, and shorter treatment period. Drug-related adverse events occurred less frequently with ferric carboxymaltose. The only noted disadvantage was that it is more expensive when compared to other iron preperations.Conclusions: Intravenous ferric carboxymaltose was safe and well tolerated with good efficacy and better patient compliance in the treatment of postpartum iron deficiency anemia.
Challenge in challenging times: a case report of ruptured isthmic ectopic pregnancy in an asymptomatic COVID-19 positive patient
Authors: Gahlot Ankita , Raval Atri , Yadav Bindoo , Saxena Swarnima 
Published: September 2021

Emergency surgical management of patients who are COVID-19 positive is extremely challenging for the treating doctors as there is a need to keep the balance between delivering optimal medical care to the patient, preventing spread to others and protecting ourselves. COVID-19 manifestations in pregnant women are similar to non-pregnant patients. The patient may be asymptomatic or may present with symptoms like cough, cold, fever and shortness of breath. In obstetric emergencies like ruptured ectopic pregnancy, when a patient presents in casualty with history of amenorrhea, pain abdomen and features of shock, main priority for the clinician is to stabilize them and treat the underlying cause so as to save their life. We report the emergency management of a hemodynamically unstable ruptured ectopic pregnancy at 9 weeks of gestation in a COVID-19 positive patient. It was stressful for the treating doctors because of high infectivity of the disease, scarcity of resources during the pandemic and precarious condition of the patient.
Treatment seeking patterns of the COVID-19 first wave patients: a narrative study from Dhaka, Bangladesh
Authors: Kazi Nahida Sultana , Kazi Shahedul Halim 
Published: September 2021

Background: The COVID-19 has already taken the lives of 4,088,281 people worldwide. To date, the deadly virus has killed 17,894 people in Bangladesh following a sharp increase in death per day. The current article focuses on the treatment-seeking patterns of COVID-19 patients during the first wave of the pandemic in the country. Methods: This is a qualitative study based on semi-structured interviews with 30 respondents selected purposively. The interviews were transcribed verbatim and analyzed narratively. Results: The study shows that 28 out of 30 participants pursued treatments from home, whilst, two individuals with comorbidity got admitted to the hospitals for weeks. This indicates that there is an association between comorbidity and hospitalization of the COVID-19 patients. The study reveals that the use of telemedicine service amidst COVID-19 has initiated a new era of health-seeking among people in Bangladesh. Similarly, media and the internet played a significant role in the quick access to information about the pandemic as well as to decide on the response and healing patterns of the participants. Besides the pharmaceutical drugs, using herbs was a common remedial process among the patients in the study. Conclusions: Like other countries, people in Bangladesh are also puzzled about the coronavirus and its treatment procedures. A proper response to the current situation, an effective preparedness policy, and public awareness are crucial for tackling the further destruction resulting from a highly infectious disease.
A clinical study of traumatic tympanic membrane perforation
Authors: A. T. Fida Harish , Prasad K. U. Raghavendra 
Published: September 2021

<p><strong>Background:</strong> Tympanic membrane (TM) which forms the partition between external auditory canal and middle ear may be ruptured by trauma. Traumatic TM perforation is a commonly observed condition. Though, several therapeutic interventions have been described, conservative follow-up until spontaneous complete recovery is the most common choice.</p><p><strong>Methods:</strong> It was a prospective cohort study conducted during a period of 10 months from July 2020 to April 2021, carried out in 30 patients who presented to outpatient department of ENT and casualty of Hassan institute of medical sciences hospital with traumatic TM perforation. After taking informed consent, detailed history was taken, thorough examination of ear was performed and characteristics of perforation were noted. Pure tone audiometry (PTA) was conducted, data was statistically analysed.</p><p><strong>Results:</strong> Mean age group was 33.1 years and 73.3% were males. Ear pain was the commonest symptom with accidental trauma being the most common cause. 70% of them had left TM perforation and posteroinferior quadrant was mostly involved.</p><p><strong>Conclusions:</strong> Traumatic TM perforation is commonly seen in young adults following accidental trauma and assault. Earache, sudden hearing loss and tinnitus are the common symptoms. Most of the cases heal spontaneously with conservative management.</p>
Retrospective study of lightning fatalities in Raigarh, Chhattisgarh
Authors: Ban Goswami Rajesh , Dutta A. 
Published: September 2021

is a massive electrostatic discharge caused by the circulation of warm moisture-filled air through unbalanced electric field in the atmosphere, accompanied by the loud sound of thunder.: The present study was conducted to ascertain the pattern of lightning cases along with distribution of cases based on age, sex, season, location, activity of the victim and injury pattern in the corpse.: The present cross sectional retrospective study was carried out in the department of Forensic Medicine at Govt. Medical College, Raigarh, CG. All autopsy cases of lightning deaths from 2018 to 2019 (two years) were considered for the study.: Most of the deceased were in the age group of 31-40 years. All incidents happened in open field. High incidence of lightning deaths occurred during monsoon season and peak incidence in evening hours. In most cases arborescent mark was found as pathognomonic finding.: Lightning incidents are always accidental in nature. They are fatal and need prompt resuscitative measures. Lightning injuries have bizarre presentation in the body, therefore the autopsy surgeon needs meticulous and detailed methodical approach during autopsy.
Correlation between cyberloafing and media consumption: Results of teenagers’ self-reports
Authors: Sivrikova Nadezhda 
Published: September 2021

The study of the correlation between cyberloafing behaviour and the features of teenage media use became the goal of this research. A total of 121 teenagers (13–15 years old) participated in the survey. There were 61 boys and 60 girls. The results of the study showed that the phenomenon of cyberloafing is not widespread among schoolchildren in Russia. Most often, during lessons, teenagers search the network for the information they need or to communicate. The most popular sources of information for adolescents are the Internet, books and television. The results of the study show that the formation of cyberloafing behaviours is associated with quantitative and qualitative features of adolescent media consumption. The level of cyberloafing depends on media competence, as well as on the characteristics of the perception and processing of media information. The limitations of the presented study are discussed in the final part of this article.

Keywords: Cyberloafing, media use, generational psychology, adolescents, teenagers.
VARIABILIDADE PLUVIOMÉTRICA E A PRODUÇÃO DE MILHO NO CURIMATAÚ OCIDENTAL DA PARAÍBA
Authors: Silva Maciel Rocha da , Luna Igor Revelles Gomes , Santos João Paulo de Oliveira , Pereira Daniel Duarte , Nascimento Izaias Romário Soares do , Silva Diego Alves Monteiro da , Cartaxo Paulo Henrique de Almeida , Luna Neto Erasmo Venâncio de , Alves Andressa Kamila Souza , Araújo José Rayan Eraldo Souza 
Published: September 2021

O milho é uma das culturas mais cultivadas do Semiárido no Brasil, no entanto, sua produção é ainda pouco tecnificada, o que leva essa cultura ser extremamente dependente de fatores ambientais. Nesse sentido, o presente estudo objetivou analisar a evolução da produção de milho no munícipio de Barra de Santa Rosa, Paraíba, entre os anos de 2002 e 2016, associando os resultados obtidos com a precipitação pluviométrica local. Para tanto, visando analisar a influência da precipitação sobre as variáveis de produção da cultura do milho, assim como a relação entre essas variáveis, utilizou-se uma matriz de correlação. Foi também realizada análise de similaridade entre as variáveis obtidas para os anos avaliados e uma análise descritiva de componentes principais. Os resultados evidenciaram correlação positiva da precipitação pluviométrica sobre todas as variáveis analisadas, principalmente para a área plantada e área colhida. Mesmo em anos com precipitação normal ou acima da média climatológica, a produção total de milho se mostrou baixa. A análise de componentes principais registrou 84,67% de explicação da variância original nos dois primeiros eixos e demonstrou a forte associação entre área plantada, colhida e produção. A análise de agrupamento hierárquico gerou a formação de quatro grupos principais, sendo estes associados principalmente aos resultados produtivos da cultura do milho. A precipitação pluviométrica se mostrou como um fator extremamente importante na dinâmica de produção de milho no municípiode Barra de Santa Rosa, influenciando principalmente na área plantada e colhida.
Sequências deposicionais fluviais e evolução geomorfológica da bacia do Rio Paraúna - Serra do Espinhaço Meridional, Sudeste do Brasil
Authors: Carvalho Alex de , Magalhães Junior Antonio Pereira 
Published: September 2021

A identificação de registros de mudanças na dinâmica hidrossedimentar ao longo do tempo permite verificar possíveis alterações da estabilidade de sistemas fluviais e discutir suas implicações na evolução geomorfológica. Este artigo discute a contribuição dos processos fluviais na configuração geomorfológica da bacia do rio Paraúna, ao longo do Pleistoceno Superior/Holoceno. Realizaram-se as seguintes etapas metodológicas: reunião de informações da área estudada; a identificação, mapeamento e caracterização de níveis e sequências deposicionais fluviais; e a datação de sedimentos fluviais pela Luminescência Opticamente Estimulada (LOE). Baseando-se na topografia e na resistência litológica, pode-se identificar dois compartimentos geomorfológicos: Superfícies Elevadas (SE) e Depressão de Gouveia (DG). A dinâmica fluvial é condicionada pelo nível de base regional (rio Paraúna) na DG e pelos níveis de base locais controlados por quartzitos (Supergrupo Espinhaço) nas SE. Frequentemente, as médias/altas vertentes possuem níveis de seixos escalonados e os fundos de vale colmatados possuem níveis arenosos embutidos e/ou encaixados. Na DG, a estabilização do nível de base condicionou a configuração dos fundos de vale, favorecendo a redução da incisão fluvial, o encouraçamento das calhas e a regularização dos perfis longitudinais. Nas SE, a litologia e aspectos locais das bacias e dos canais explicam a diversidade de configurações de vales.
Associations of Gene Polymorphisms and Prognosis in Highly Adherent to Treatment Patients After Myocardial Infarction
Authors: Pereverzeva K. G. , Yakushin S. S. , Nikiforov A. A. , Novoselova A. A. 
Published: September 2021

Aim. To evaluate the influence of genetic factors on the risk of developing a combined endpoint, during a one-year supervision of patients, who had myocardial infarction and highly adherent to drug therapy.Material and methods. The research included 250 patients with high adherence to treatment with myocardial infarction, using the method of polymerase chain reaction we determined the polymorphisms Thr174Met and Met235Thr in the AGT gene, Arg389Gly and Ser49Gly in the ADRB1 gene, Ser447Ter in the LPL gene and Leu28Pro in the APOE gene, Trp212Ter and G681A in the CYP2C19 gene, and then we evaluated their influence on the prognosis.Results. A significant influence on the risk of developing combined endpoint was noticed for the polymorphism of CYP2C19 (G681A) gene. For the GA genotype of the CYP2C19 gene (G6881A), the OR of developing an unsuccessful outcome was 1.97 (95 % CI 1.05 — 3.69) (P = 0.03). For сarrier-state of A allele the OR was 1.46 (95 % CI 1.06 — 3.64) (P = 0.03). Conclusion. The results received indicate the need for individual approach for the choice of drugs from the group of inhibitors P2Y12-receptors for dual antiplatelet therapy, and if clopidogrel is chosen it is necessary to resolve the issue of pharmacogenetic testing for CYP2C19.
The Influence of Leadership, Communication and Work Discipline on Employee Performance at UMKM Bumbu Machmudah Sidoarjo
Authors: Mashudi Mashudi 
Published: September 2021

In this study aims to determine the effect of leadership, communication and work disicpline in simultan and partial to employee performannce UMKM Bumbu Machmudah, and to determined the effect of the most significant among leadhership, communication and work disicpline on employee performannce UMKM Bumbu Machmudah Sidoarjo. The result of this study took a sample of 150 employees with technique jenuh sampling and non probability sampling in UMKM Bumbu Machmudah Sidoarjo. Moreover, this study is conducted using a quantitave method, survey, explanatory reserch As well as using analysis multiple linear with SPSS version 17 for Windows.
The result of this study based on Simultaneous test shows that communication and disicpline affect the employee performannce simultaneously, and partial test shows that leadership, communication and work disicpline and affect the employee performannce in UMKM Bumbu Machmudah Sidoarjo. Work disicpline show the most significant effect toward the employee performannce because it has the significance of the smallest compared with the other independent variables.
A High-Pressure Thermal Aureole of the Bayan-Kol Gabbro–Monzodiorite Intrusion (Western Sangilen, Southeastern Tuva): Evidence for Lower-Crust Mafic Magma Chambers
Authors: Selyatitskii A.Yu. , Polyansky O.P. , Shelepaev R.A. 
Published: September 2021

Abstract—Thermal metamorphism produced an aureole near the early Paleozoic Bayan-Kol gabbro–monzodiorite intrusion in the Erzin shear zone of western Sangilen (Tuva–Mongolia microcontinent, Central Asian Orogenic Belt). Field observation of intrusive contact, structure–textural and mineral transformations of metamorphic rocks, regular changes in the chemical composition of minerals with approaching the intrusive contact, and high temperature gradient from intrusive to wallrocks verified the occurrence of a contact aureole near the Bayan-Kol intrusion. The high-gradient thermal metamorphism (M2) affected garnet–staurolite–kyanite schists that formed during earlier regional metamorphism (M1) at 6.2–7.9 kbar and 600–670 ºC. The 0.5 km wide M2 metamorphic aureole mapped along the northwestern intrusion margin consists of a muscovite–sillimanite zone adjacent to the sedimentary country rocks and a cordierite–K-feldspar zone on the side of the intrusion. The M2 metamorphic reactions occurred within the granulite facies temperature range 880–910 ºC along the contact with monzodiorites and at ~950 ºC along the boundary with gabbronorites; the temperature on the aureole periphery was about 640 ºC. Pressure estimates indicate deep-seated high-grade metamorphism at 6.9–7.8 kbar, while the intrusion itself crystallized at 7.7–7.8 kbar. The suggested numerical model implying the formation of a thermal aureole at a depth of 26 km (7 kbar) in the lower crust is consistent with the temperature pattern determined by geothermobarometry for several key points of the metamorphic zoning and confirms its deep-level origin. Thus, the aureole near the Bayan-Kol intrusion represents a rare case of contact metamorphism in the lower continental crust. The obtained results, along with published petrological and geochronological evidence, reveal two depth levels of the early Paleozoic M2 metamorphism in the Sangilen area: upper (7–15 km, 2–4 kbar) and lower (26–30 km, 7–8 kbar) crust. The Bayan-Kol gabbro–monzodiorite intrusion is likely a small apophysis or a fragment of a deep-crust intermediate magma chamber, while the moderate-pressure (7–8 kbar) M2 granulites in the Erzin shear zone are products of high-gradient metamorphism related to the Cambrian–Ordovician collisional mafic magmatism in the Sangilen area.
Efficacy Comparison and Safety Analysis of Radical Resection of Sigmoid Colon Cancer Based on Different Cancer Locations
Authors: Chen Li , Chen Engeng , Jin Dongai , Chen Min , Zhou Wei , song zhangfa 
Published: September 2021

Abstract
Background: Sigmoid colon cancer is a common type of colon cancer; it refers to tumor lesions occurring in the segment approximately 16 cm to 50 cm from the anal margin. Currently, surgical resection is the most effective treatment for non-metastatic sigmoid colon cancer. Therefore, to more accurately standardize colon cancer surgery, we classified the sigmoid colon into distal and proximal segments. This study compares and analyzes the intraoperative situation, postoperative pathology and safety of radical resection of sigmoid cancer in different locations from different aspects. Result: The patients with sigmoid colon tumor can be divided into distal group (16-30cm from the anus) and proximal group (31-50cm from the anus) according to the distance between the tumor and the anal margin. Conclusion: The patients in the distal group using stapler for intestinal anastomosis and anal decompression tube were significantly more than those in the proximal group. For the ligation of the inferior mesenteric artery, high ligation was usually used or the left colic artery was usually preserved in the distal group, and the superior rectal artery was usually retained in the proximal group. The incidence of postoperative complications in the distal group was higher than that in the proximal group, but there was no significant difference between the two groups.