bluuebunny/crossref_metadata_2025 huggingface dataset:
Environmental Factors Determinate Roadkill Levels of the Endemic Iberian Species, Iberian Hare (Lepus Granatensis)
Authors: Duarte Jesús , Romero David , Rubio Pablo , Farfán Miguel Ángel , Fa Julia
Published: June 2021

Lepus granatensis is an Iberian Peninsula endemic species and one of the most important small game species. We surveyed Iberian hare-vehicle accidents in roads network in southern Spain, analysing the Mediterranean landscape, the main habitats of this species. We recorded roadkill of roads during 6-month, compared hare roadkill densities to hare hunting yields. We analyzed the spatial patterns and factors that could be influencing the hare road kill. We detected blackspots of hare road kill in areas with high landscape heterogeneity and included embankments, intersections roads and high traffic intensity. The hare roadkill ranged between 6% and 41% of the annual harvest of hares killed on neighbouring hunting estates. We therefore consider it highly relevant to take into account the hare road kill, especially in hare hunting areas, suggesting to gamekeepers and managers addressing the issue of road kill of hares. It would be necessary that hunting quotas be adjusted in territories where the additive effect of these non-natural hare mortalities converge. Results point to future directions for applied research in road ecology, which would include demographic compensation and roadkill mitigation. Our methodology could be of wide use to identify lagomorphs’ road kill blackspots by analysing environmental spatial patterns.
Rivaroxaban versus Vitamin K Antagonists (Warfarin) based on the triple therapy for left ventricular thrombus after ST-Elevation Myocardial Infarction
Authors: Zhang Zhongfan , Zhang Qian , Qu Ming , Yu Miao , Jiang Zhenya , Li Delin , Si Daoyuan , Zhang Wenqi
Published: June 2021

Background: Left ventricular thrombus(LVT) can lead to serious complications, and mostly formed after ST-Elevation myocardial infarction(STEMI). The Off-label use of new oral anticoagulants(NOACs) in the triple therapy of LVT after STEMI has increased in the past few years. As one of the most widely used NOACs, the data of safety and efficacy of rivaroxaban in LVT after STEMI is limited and warrants continued exploring.Methods: We conducted a retrospective cohort study involving STEMI patients underwent primary percutaneous coronary intervention (PCI). Among patients who developed LVT after STEMI, we evaluated the efficacy and safety of rivaroxaban plus DAPT therapy associated with thrombus resolution and clinical adverse events, compared with triple therapy with VKA. Results: In 1,335 patients with STEMI, a total of 77 (5.7%) developed LVT over the follow up period (median 25.0 months). Of the patients diagnosed with LVT, 31 patients were started on triple therapy with VKA, 33 patients on triple therapy with rivaroxaban. There was a consistent similarity in LVT resolution with rivaroxaban application compared to VKA application during the follow-up period[HR:1.57(95%CI 0.89-2.77), p=0.096; Adjusted HR:1.70(95%CI 0.90-3.22), p=0.104]. When the analysis focused on LVT resolution at different time points during the follow-up period, triple therapy with rivaroxaban showed quicker resolution than with VKA(6months:p=0.049; 12months:p=0.044; 18months:p=0.045). Meanwhile, similar risks of ISTH bleeding were recorded in both groups, with no difference between the two groups(Rivaroxaban 6.1% vs VKA 9.7% , p=0.444). Fewer net adverse clinical events(NACE) were observed in the rivaroxaban group compared with the VKA group[Rivaroxaban 24.2% vs VKA 58.1%; HR:0.31(95%CI 0.14-0.68), p=0.003; Adjusted HR: 0.23(95%CI 0.09-0.57), p=0.001].Conclusions: This observational study suggests triple therapy with rivaroxaban has similar and quicker LVT resolution in patients with LVT after STEMI, compared with triple therapy with VKA, and perhaps was accompanied with a better clinical benefit. Larger sample sizes and randomized controlled trials are needed to confirm this observation.
Morphological Analysis of Medullary Cavity for Designing Personalized Femoral Stem
Authors: Wang Lin , Guo Kaijin , Zhu Hong , He Kunjin , Geng Weizhong
Published: June 2021

To improve the quality and efficiency of femoral stem prosthesis design, a Monte Carlo method based on femoral bone marrow cavity analysis is proposed to measure morphological parameters using anatomical semantics. The region of interest is the femur, which includes the medullary cavity and cortical region. After this region is extracted, the size of the cavity and region is simulated using the Monte Carlo method. Finally, based on clinical needs, the morphological parameters are calculated and analyzed based on the size of the region of interest. From the perspective of the probability model, the non-random problem of solving the cross-section area of the femoral marrow cavity is transformed into one having a random nature so that a probability model can be used. The experimental results show that this method is simple, flexible, and efficient. It provides a new and reasonable scientific method for comprehensively understanding the anatomical morphological changes of the femoral marrow cavity. The measurement and analysis of the morphological parameters of the femoral bone marrow cavity in this paper provide the necessary scientific theoretical support for improved morphologic research, design, and clinical selection of femoral stem prostheses and has important significance and application value in clinical practice.
Vertical distribution and sources of PAHs in different agricultural soil profiles: a case study in Jianghan Plain, Central China
Authors: Wang Zeya , Gong Xiangyi , Zhang Jiaquan , Ren Dajun , Meng Dekang
Published: June 2021

PAHs are one of the persistent organic pollutants (POPs) and widely distributed in nature. This study aimed to investigate the distribution and origination of polycyclic aromatic hydrocarbons (PAHs) in 3 different agricultural soil profiles (paddy, cotton and rape). The study found that 16 PAHs were all detected in 3 soil profiles, where the concentrations of ∑16PAHs ranged from 122.37-664.13ng/g in surface soil and 24.15-109.76ng/g in bottom soil. Compared to other areas, the concentrations were higher than most plains, but lower than several cities. The ∑16PAHs of naphthalene(Nap) counted the most in nearly every sample. The total concentrations of ∑16PAHs were higher in shallow soil and decreased sharply with the increase of depth, while those were smoothly distributed in paddy field (PF). The results showed that 3 soil profiles were all weakly alkaline (8 < pH < 9), and PAH concentrations in soil were linearly related with total organic carbon (TOC) at different depths except for the PF soil profiles. It was the flooded tillage method in PF that caused the different characteristics of distribution and physicochemical properties. There were high correlation between dissolved organic matters(DOM) and PAH concentrations in cotton field (CF). However, there were no correlations between concentrations of PAHs and other 3 properties (pH, clay miners). By the ratio method, PAHs were revealed mainly derived from combustion, and then petroleum.
Pilot Program of Shared Assistance with Primary Care in Patients Living with HIV, and Satisfaction with The Healthcare Received
Authors: Riera Melchor , Ferre Adria , Santos-Pinheiro Alfredo , Vilchez Helem Hayde , Martin-Peña Maria Luisa , Ribas Maria Angels , Peñaranda Maria , Fanjul Francisco Javier , Campins Antoni Abdo , Pou Joan Albert , Garcia-Gazalla Mercedes , Pou Joan , Llorente Maria Angeles , Garcia-Paz Maria del carmen , Corredor Maria Teresa , Estelrich Catalina Maria , Gomez-Lobon Ana , Murillas Javier
Published: June 2021

Background: There are few shared assistance programs with Primary Health Care (PHC) in PLWH. The aim was to develop a Pilot Program of shared HIV care in PLWH ensuring proper HIV control. Methods: Design: Prospective pilot project of a shared care intervention.Setting: HIV specialized outpatient consultations for HIV infection at Son Espases University Hospital which serves 2000 patients. Subjects: Patients who attended HIV specialized consultation between January 1st and June 30th, 2017. Intervention: Basal questionnaire on health services used by patients. HIV Training Program on HIV in Primary Health Care (PHC). Pilot Program of shared assistance (PPAC) with PHC. Main Outcomes: Maintenance of undetectable HIV viral load, antiretroviral therapy (ART) adherence, AIDS and non-AIDS events, loss of follow up, and satisfaction questionnaire. Results: The basal questionnaire was filled out by 918 patients, with 108 (11.7%) patients reporting neither knowing nor having been visited by their GP. A total of 93 patients were included in the PPAC, with a mean age of 49.9 years (SD 11.7), and an average of 14.6 years since the HIV diagnosis. Eleven patients were followed up for less than six months and were excluded from the analysis. Median follow-up during the PPAC of the remaining 82 patients was 728 days (IQR 370-1070). Sixteen patients dropped out of the PPAC (19.5%), three died, three were lost to follow up, one was withdrawn due to medical criteria, and nine withdrew voluntarily.No patient presented any AIDS defining events, although eight patients presented non-AIDS events. All the patients had undetectable viral load (VL) and average ART adherence was 99.4% (SD1.4). The patient’s satisfaction score with PPAC was 8.64 (SD2.5).Conclusion: It is possible to establish shared care programs with PHC in selected patients with HIV infection, thereby reducing hospital visits while maintaining good adherence and virological control and achieving high patient satisfaction.
Utilization of both Electronical Manganese Slag and Silicate Tailings as Raw Materials for Fabrication of Cost-effective Porous Ceramics
Authors: Lin Hongfu , Li Mengke , He Zhiguo , Zhong Hui , Hu Liang , Sun Wei , Zhang Dajun
Published: June 2021

Herein, porous wollastonite ceramics with high porosity and low density were successfully fabricated with silicate tailings and electrolytic manganese slag (MS) as primary raw materials. The influences of calcination temperature, SiC and MS addition amounts on porosity, water adsorption, pore distribution, bulk density and bending strength were systematically studied. The results showed that 0.4 wt% of SiC was optimal for the ceramic foaming at the sintering temperature of 1140 ℃. The addition of MS promoted the foaming of ceramic matrix at low temperature. The porosity of ceramics reduced from 78.4–63.7%, bulk density elevated from 0.96 to 1.13 g/cm3, and bending strength increased from 8.43 to 11.22 MPa as the MS increased from 8.33 wt% to 46.67 wt%. Moreover, the best corrosion resistance performance reached to 99.55% with 8.33 wt% MS content and sintering temperature of 1160 ℃. This work is of significance for the solid waste utilization.
Knowledge assessment of Sepsis Diagnosis and Management during COVID-19 pandemic among House Officers & Medical Officers in Ibrahim Malik Teaching Hospital in Khartoum State, Sudan, 2021
Authors: Abdelrahman ElMuiz , Ahmed Khabab Abbasher Hussien Mohamed , Mahgoub Ibrahim , Omer Mohammed Eltahier Abdalla , Abdalla Yassin Abdelrahim , Bashir Abdelgadir Ali
Published: June 2021

Background: Sepsis is life-threatening and frequently a final common pathway to death for many infectious diseases worldwide and may lead to death if left untreated. The objective is to assess the scientific medical knowledge upon sepsis among House officers and Medical officers in terms of diagnosis and management.Method: An observational cross sectional Hospital-based study was conducted through self-administered retrospective questionnaires based on the objective of the study. We enrolled 155 participants through Convenience sampling. The questionnaire contains parts of validated Sepsis criteria in terms of diagnosis and management. Analysis was done by using SPSS version 20. Data are presenter as frequencies and percentages using figures and tables. P value less than 0.05 considered significant Mann Whitney U test use to compare level of knowledge adherence between trained participants and non-trained participants.Results: The mean knowledge score about sepsis diagnosis was 2.6 out of 10 (SD= 1.8), and about sepsis management was 2.8 out of 8 (SD=1.8) the mean overall score was 5.5 out of 18.No significant difference found between participants who were trained upon diagnosis and management of sepsis and those who were not.Conclusion: Study findings illustrated that the capacity to perceive and manage sepsis among House Officers and Medical Officers doctors is poor and there are dangerous gaps in their investigation and management of such septic patients.
Investigation of the Role of CpG Methylation in Epithelial Mesenchymal Transition Master Genes in a Chemoresistant Ovarian Cancer Cell line
Authors: Alghamian Yaman , Soukkarieh Chadi , Abbady Abdul Qader , Murad Hossam
Published: June 2021

Ovarian cancer is one of the commonly diagnosed cancers among women. Chemoresistant is an essential reason for treatment failure and high mortality. Emerging evidence connects epithelial mesenchymal transition (EMT) like changes and acquisition of chemoresistance in cancer. DNA methylation influences cellular processes including EMT. Here, we investigate EMT like changes in cisplatin-resistant A2780 ovarian cancer cells (A2780cis), and we study the DNA methylation role in EMT master genes regulation. Cell viability assay was carried to test the sensitivity of A2780, and A2780cis human cancer cell lines to cisplatin compared to other cancer cell lines. Differential mRNA expression of EMT markers using qPCR was conducted to investigate EMT like changes. The role of CpGs methylation in gene expression regulation was investigated by 5-azacytidine (5-aza) treatment. DNA methylation changes in EMT genes were identified using Methylscreen assay between A2780 and A2780cis cells. A2780cis maintains its cisplatin tolerance ability and exhibits phenotypic changes congruent with EMT. Methylscreen assay and qPCR study revealed DNA hypermethylation in promoters of epithelial adhesion molecules CDH1 and EPCAM in A2780cis compared to the cisplatin-sensitive parental cells, these changes were concomitant with gene expression down-regulation. DNA hypomethylation associated with transcription up-regulation of the mesenchymal marker TWIST2 was observed in the resistant cells. Azacytidine treatment confirmed the DNA methylation role in the regulation of gene expression of CDH1, EPCAM and TWIST2 genes. A2780cis cell line undergoes EMT like changes, and EMT master genes are regulated by DNA methylation. A better perception of the molecular alterations which correlate with chemoresistance may lead to therapeutic benefits such as chemosensitivity restoration.
Identification of SARS-CoV-2 P.1-related lineages in Brazil provides new insights about the mechanisms of emergence of Variants of Concern
Authors: Gräf Tiago , Bello Gonzalo , Venas Taina Moreira Martins , Pereira Elisa Cavalcante , Paixão Anna Carolina Dias , Appolinario Luciana Reis , Lopes Renata Serrano , Mendonça Ana Carolina da Fonseca , Rocha Alice Sampaio Barreto da , Motta Fernando Couto , Gregianini Tatiana Schäffer , Salvato Richard Steiner , Fernandes Sandra Bianchini , Rovaris Darcita Buerger , Cavalcanti Andrea Cony , Leite Anderson Brandão , Riediger Irina , Debur Maria do Carmo , Bernardes André Felipe Leal , Ribeiro-Rodrigues Rodrigo , Grinsztejn Beatriz , Nascimento Valdinete Alves do , de Souza Victor Costa , Gonçalves Luciana , Costa Cristiano Fernandes da , Mattos Tirza , Dezordi Filipe Zimmer , Wallau Gabriel Luz , Naveca Felipe Gomes , Delatorre Edson , Siqueira Marilda Mendonça , Resende Paola Cristina
Published: June 2021

One of the most remarkable features of the SARS-CoV-2 Variants of Concern (VOC) is the unusually large number of mutations they carry. However, the specific factors that drove the emergence of such variants since the second half of 2020 are not fully resolved. In this study, we described a new SARS-CoV-2 lineage provisionally designated as P.1-like-II that, as well as the previously described lineage P.1-like-I, shares several lineage-defining mutations with the VOC P.1 circulating in Brazil. Reconstructions of P.1 ancestor sequences demonstrate that the entire constellation of mutations that define the VOC P.1 did not accumulate within a single long-term infected individual, but was acquired by sequential addition during interhost transmissions. Our evolutionary analyses further estimate that P.1-ancestors strains carrying half of the P.1-lineage-defining mutations, including those at the receptor-binding domain of the Spike protein, circulated cryptically in the Amazonas state since August 2020. This evolutionary pattern is consistent with the hypothesis that partial human population immunity acquired from natural SARS-CoV-2 infections during the first half of 2020 might have been the major driving force behind natural selection that allowed VOCs' emergence and worldwide spread. These findings also support a long lag-time between the emergence of variants with key mutations of concern and expansion of the VOC P.1 in Brazil.
Methodology for staff management assessment efficiency in the medical institutions
Authors: Opanasiuk Yuliia , Grabowska Monika , Volovyk Olena
Published: June 2021

This paper considers human resources to be important for the effective functioning and development of the organization in current socio-economic conditions. Corporate management involves the impact on people (corporate staff) primarily. The authors noted that the staff management assessment is a powerful instrument to increase the management process’s effectiveness. The normative documents of the Ministry of Health of Ukraine define the following methods of quality control of medical services: clinical audit and monitoring. The purpose of a clinical audit is to find opportunities to achieve high-quality health care. Continuous tracking of staff provides an opportunity to make effective management decisions and increase productivity. An adequate system for assessing the quality of medical staff should respond not only to the result of medical care but also to prevent defects. Personnel management in health care quality should be carried out to avoid mistakes in the provision of medical care. This concept is designed to create an internal structural quality management system. Therefore, it is essential to understand the assessment process and its interactions at different stages of the management process within the organization. In the paper, the authors determined ways to enhance the medical staff management assessment. The study presents the essence and features of medical staff assessment based on the general principles and methods for assessing the effectiveness of public and private medical institutions. The authors analyzed the medical staff assessment system in medical institutions and identified its features under medical reform. Besides, the study provided the investigation of the current state of the staff assessment of medical institutions. It analyzed the areas of concern in the methods and mechanisms of staff assessment. To investigate the current situation in the medical institution, the structure and movement of medical staff were analyzed. The findings identified the gaps in the current staff assessment system and the reasons for the low rates of nursing staff. The authors highlighted ways to improve the current staff assessment system in the institution through the social satisfaction criterion, interviewing the parturient women and configuration management of quality based on the PDCA cycle. The obtained results showed that the medical institution had different reserves available to increase the parturient women satisfaction with the level of medical services received.
The Analysis Of Musyarakah Contract Sharing System Implementationin BPRS Saka Dana Mulia Kudus
Authors: Huda Nur , Fajri Fitri
Published: June 2021

Purpose - This research aims to know how the implementation of revenue sharing system to Musyarakah finance and to know the Conformity between the implementation done with Fatwa DSN No.08/DSN-MUI/IV/2000.Method - The study uses a qualitative descriptive approach with a type of case study research.Result - The results showed that a). the implementation of revenue sharing system to Musyarakah finance in BPRS Saka Dana Mulia uses projections or estimates between 1,75% - 2,5% multiplied by the bank's capital. This revenue sharing system has been determined at the beginning of the nominal magnitude of the result for which the customer must be deposited every month. But the bank continues to see the customer's business, when the customer's business suffered losses that are not caused by human error then the bank and the customer will renrenegotiate regarding the outcome.b). The implementation of Musyarakah finance to PT. BPRS Saka Dana Mulia which has been adjusted to Fatwa DSN No.08/DSN-MUI/IV/2000 located at the statement of ijab qabul, contract object (capital, work, andloss), Operational costs and disputes. While that is still not appropriate, that is in the part of the object contract about the profit.Implication - This research is only researching in PT. BPRS Saka Dana Mulia Kudus.Originality - there are differences in the division of sharing system between theories and practices implemented in BPRS Saka Dana Mulia.
Quotation/Parenthesis Qur’an Verse Before Beginning Deed In The Structure Of Notary Deed In Sharia Financial Institutions’ Contract
Authors: Usman Sandi Aji , Rasiam Rasiam
Published: June 2021

Purpose - This research aims to reveal and describe the issue of Islamic financial institutions' contract structure, the practice of the Qur'an quotation/parenthesis in the notary deed structure in Sharia financial institutions ' contract.Method - The method used in this research is normative juridical, with the processing and analysis of data in a qualitative descriptive way, this research data is sourced from secondary data and supported by interviews from sources as supporting data Secondary. The approach is to study with the regulatory approach of legislation.Result - In Islamic Sharia or fatwa is not regulated about the structure of the deed on the deed authentic or under the hands, but which is governed only the principles or basic rules only. Structure of authentic deed made by notary official, especially the deed in financial institution that includes quotation of Qur'an verses using Indonesian language before deed title does not violate the provisions of UUJN.Implication - The absence of the form of the standard structure of sharia agreement both for sharia transactions and in particular sharia financial institutions should be the financial Services Authority in collaboration with the organization of Indonesian Notary Association (INI) who is already experts to Making authentic deed in the form of raw in accordance with UUNJ.Originality - The focus of this research is to reveal and describe the issue of Islamic financial institutions ' contract structure.
Tendencies in the propagation of fires and ammunition explosions at fixed storage facilities
Authors: Zlobin V. А.
Published: June 2021

Aim. To suggest an approach to identifying the common features of statistical series containing information on the time, place and external conditions of the development and propagation of emergency situations associated with fires and ammunition explosions at fixed storage facilities, to synthesize the function of partial risk indicator of such situations, i.e., the energy susceptibility to external effects of ammunition storage systems.

Methods. The paper uses methods of mathematical analysis of statistical series and probability theory. For the first time ever, individual external conditions of emergency situations involving ammunition are analysed using statistical series (rate of insolation).

Results. The paper has collected and classified statistical data on emergencies involving fires and explosions in ammunition storage facilities that took place in the current century in a number of countries of the world, whose emergency nature was confirmed by extensive media coverage. Using statistical series analysis, an exponential relationship has been established between the rate of fires and explosions and the total power saturation of the ammunition storage system.

Conclusions. The frequency of emergencies involving fires and explosions depends on the overall power saturation of the storage system that is defined by the solar intensity in the area of the ammunition storage facility that depends on its latitude and season. The suggested approach allows, by analysing empirical data on the time and place of emergencies, identifying the specific survivability values of a hazardous storage facility characterizing the energy susceptibility of the system to the effects that trigger explosions and fires.
Immunosuppressant Drugs and Covid-19: Associated Risks, Drug-Drug Interactions and Contraindications
Authors: Talukdar Debjyoti , Ignacio Diane , Gupta Madan Mohan
Published: June 2021

:

Immunosuppressant drugs like Etanercept, Mycophenolate mofetil, Sirolimus, Cyclosporine,
and Rituximab can weaken the immune system and make patients susceptible to SARS
nCoV-2 virus. These drugs make immunocompromised persons more vulnerable to complications
associated with COVID-19. Moreover, it can also increase mortality and morbidity, as a weakened
immune system can lead to a longer duration of infection. This study discusses the guidelines on
immunosuppressant drugs and their associated risk factors with COVID-19, issued by the U.S
CDC (Centers for Disease Control and Prevention), WHO (World Health Organization), U.S FDA
(Food and Drug Administration), and other accredited global health organizations. Moreover, it also
includes information about pharmaceutical properties, mechanism of action, COVID-19 associated
risk factors, adverse drug reactions, contraindications, and drug-drug interactions. Our study
will help government partners and international health organizations to understand COVID-19
health risks associated with immunosuppressants. Increased public awareness about effective drug
therapy for autoimmune diseases, cancer treatment, immunocompromised, and organ transplant patients
will help lower the mortality and morbidity associated with the disease amid the COVID-19
pandemic.
Vicisitudes de la práctica de enfermería ante la Covid-19
Authors: Orozco-López O.V.
Published: June 2021

Lejano parece el mes de enero cuando estábamos saliendo de las festividades decembrinas y con gran expectativa y emoción recibíamos un año nuevo. Iniciaba el 2020, especial pues es nuestro Año Internacional de los Profesionales de la Enfermería y de la Partería, designado así por la 72ª Asamblea Mundial de la Salud en conmemoración del bicentenario del natalicio de Florence Nightingale.

Sin embargo, a inicios de este año la OMS reportó la existencia de un brote de neumonía atípica en la ciudad china de Wuhan. Se trataba del surgimiento de lo que posteriormente sería la pandemia de la Covid-19.

El proceso de reconversión de las unidades que prestaron atención a pacientes con Covid fue el primero de muchos retos que el personal de salud que tuvimos que enfrentar.
Magnetic investigation in the vicinity of Derby, Adams County, Colorado, U.S.A.
Authors: Del Castillo Luis
Published: June 2021

Durante el verano y otoño de 1967, se realizaron levantamientos magnéticos de intensidad vertical en dos áreas adyacentes al pozo Rocky Mountain Arsenal Num. 1, localizado al NE de la ciudad de Denver, Condado de Adams, en el Estado de Colorado. Se dio a estos levantamientos el nombre de Arca Manila y Area Eastlake, las cuales están cubiertas con aluvión; la edad de las rocas subyacentes varia del Precámbrico al Cenozoico y se piensa que el basamento cubierto por dichas rocas está constituido por rocas metamórficas completamente plegadas y falladas. La profundidad de las rocas basales, inferida por la columna estatigráfica del Pozo Arsenal No. 1 fue tomada como base para la evaluación cuantitativa de las anomalías magnéticas en ambas áreas cuya interpretación se dificultó por la falta de información de subsuelo y por la variación de propiedades magnéticas de las rocas basales.No existe evidencia de grandes desplazamientos debidos a fallas verticales en las dos áreas, luego la única posibilidad de fallas en el área de Eastlake que pudiesen producir temblores son las de resbalamiento a rumbo de inclinación acompañadas por pequeños desplazamientos verticales. La amplitud de las anomalías tanto observadas como calculadas en este estudio es concordante para una profundidad del basamento de orden de 3,510 a 3,960 m. La interpretación obtenida en el Area Manila pudiera ser objetada, pero la tendencia de las anomalías magnéticas terrestres encontradas concuerda con las del levantamiento aeromagnético.El cambio de gradiente magnético en el área de Eastlake probablemente se debe a un contraste de susceptibilidad magnética de 1,350 x 10-6 cgs entre un bloque de 6,436 m de roca alterada por esfuerzos tectónicos y un gneiss anfibolitico. Este contacto podría representar la extensión oriental de las formaciones con rumbo este-oeste que afloran en las montañas Front Range hacia el oeste. Las causas de las anomalías magnéticas en la Cuenca Denver son variadas, por lo que no es posible extrapolar los resultados obtenidos a otras áreas dentro de la misma cuenca.
The Mexican Volcanic Belt structure and tectonics
Authors: Mooser Federico
Published: June 2021

El Cinturón Volcánico Mexicano parece ser una antigua sutura cuya reapertura tuvo lugar en el Terciario Medio. Su curso irregular y zigzagueante, con grandes volcanes levantándose en sus esquinas meridionales, hace pensar que en épocas geológicas tempranas la sutura sufrió grandes desplazamientos. La actividad ígnea del Cinturón (en su mayoría lavas andesíticas) pudo originarse de la fusión de la Placa de Cocos, posterior a la subducción de la Trinchera de Acapulco. No existe conexión entre. la zona de Fractura Clarion y los grandes volcanes del Cinturón, los cuales sólo aparentemente están alineados de Este a Oeste. Probablemente la debilidad cortical por la cual entró el levantamiento. del Pacífico Oriental hendiendo el Golfo de California, originalmente formó, con la sutura del Cinturón, una antigua y única zona de debilidad.
Reconnaissance geochemistry of some rocks of the Guanajuato Mineral District, México
Authors: Pal Surendra
Published: June 2021

Se usó el análisis instrumental de activación por neutrones para determinar la concentración de unos 16 elementos (Na, K, Rb, Cs, Ba; Th, Fe, Sc, Co, Cr, La, Eu, Zr, Hf, Ta and Sb) en rocas del Distrito Minero de Guanajuato, México. El análisis de las rocas de referencia de la U.S.G,S. muestra que el método es bastante confiable para estudiar la geoquímica de las formaciones de las rocas. Se discuten estos resultados en base a la geología y se señalan sus significados sobre las relaciones petrogenéticas.
Credible as Evidence? Multilayered Audience Reception of Narrative Arguments
Authors: Bubikova-Moan Jarmila
Published: June 2021

Building on a view of both narration and argumentation as dynamic concepts, this paper considers ways of assessing the credibility of narrative arguments constructed in empirical examples of conversational discourse. I argue that the key in any such exercise is to pay close attention to both structural and pragmatic details, particularly how conversational storytelling gets embedded in the surrounding discourse and how the way this is discursively accomplished vis-à-vis the narrators’ multilayered audience may be reflective of their argumentative goals.
Quantum advantage from energy measurements of many-body quantum systems
Authors: Novo Leonardo , Bermejo-Vega Juani , García-Patrón Raúl
Published: June 2021

The problem of sampling outputs of quantum circuits has been proposed as a candidate for demonstrating a quantum computational advantage (sometimes referred to as quantum "supremacy"). In this work, we investigate whether quantum advantage demonstrations can be achieved for more physically-motivated sampling problems, related to measurements of physical observables. We focus on the problem of sampling the outcomes of an energy measurement, performed on a simple-to-prepare product quantum state – a problem we refer to as energy sampling. For different regimes of measurement resolution and measurement errors, we provide complexity theoretic arguments showing that the existence of efficient classical algorithms for energy sampling is unlikely. In particular, we describe a family of Hamiltonians with nearest-neighbour interactions on a 2D lattice that can be efficiently measured with high resolution using a quantum circuit of commuting gates (IQP circuit), whereas an efficient classical simulation of this process should be impossible. In this high resolution regime, which can only be achieved for Hamiltonians that can beexponentially fast-forwarded, it is possible to use current theoretical tools tying quantum advantage statements to a polynomial-hierarchy collapse whereas for lower resolution measurements such arguments fail. Nevertheless, we show that efficient classical algorithms for low-resolution energy sampling can still be ruled out if we assume that quantum computers are strictly more powerful than classical ones. We believe our work brings a new perspective to the problem of demonstrating quantum advantage and leads to interesting new questions in Hamiltonian complexity.
Gastric Polyps and Atrophic Gastritis
Authors: Kolesnikova I. Yu. , Novikova A. S.
Published: June 2021

Aim. A study of atrophic gastritis severity and rate in patients with gastric polyps (GP).

Materials and methods. The study enrolled 61 patients with hyperplastic (HGP) and 41 — with adenomatous GP (AGP). All patients had 24-h gastric pH-metry, control of the pepsinogen I, II and gastrin-17 levels, in addition to a general clinical, endoscopic, histological examination and testing for Helicobacter pylori.

Results. GP patients had benign manifestations prevailed with epigastric heaviness and overflow, and a scarce history of H. pylori testing at no control of rendered eradication therapy. A symptomatic proton pump inhibitor treatment in GP was either prescribed or voluntary. Focal atrophic gastritis in endoscopy was revealed in 12 (19.7 %) HGP and 16 (39.0 %) AGP patients, diffused atrophic gastritis — in 49 (80.3 %) HGP and 25 (60.9 %) AGP patients. Low-grade chronic gastritis in histology prevailed in HGP, moderate — in AGP, and severe — in 21.9 % cases. Moderate (27.9 %) to severe (65.6 %) atrophy of gastric mucosa was registered in HGP, with 53.7 and 39.0 % respective AGP cases. Polyp dysplasia was detected in 20 % HGP and 75.6 % AGP cases. Pepsinogen I <25 µg/L at a pepsinogen I/II ratio ><3 was observed in 38 (62.3 %) HGP and 18 (43.9 %) AGP patients. Hypo- and anacidic were 65.6 % HGP and 31.7 % AGP patients. >H. pylori-positive were 52.5 % HGP and 70.7 % AGP cases.

Conclusion. A largely similar aetiopathogenesis of gastric polyps and chronic atrophic gastritis warrants the H. pylori diagnosis and a more detailed patient control for chronic gastritis grading and staging, functional insufficiency of gastric mucosa and the severity of hyperplastic and dysplastic change. The H. pylori eradication, in contrast to anti-secretory therapy, allows the containment of chronic gastritis and is a critical measure in gastric cancer prevention.
(EN)TERRA BRASILIS | TO BURRY BRAZIL
Authors: Amon Daniela Barcellos
Published: June 2021

Ensaio visual acerca do livro de artista (EN)TERRA BRASILIS (2020), de Daniela Amon, que, por meio de um diálogo com a história da arte e da articulação entre linguagem, matéria e símbolo, oferece uma reflexão a respeito da história do Brasil, desde tempos coloniais até os dias atuais, e uma crítica ao manejo da atual crise pandêmica.
Fatiamento da Paisagem | Landscape slicing
Authors: Guibes Patricia Stuart
Published: June 2021

A partir do fatiamento horizontal de uma fotografia, este ensaio apresenta uma reflexão sobre perda de referências e dissolução de perspectivas. As imagens alongadas, seis fatias de um todo, são compreendidas como questionamentos sobre a impermanência da paisagem urbana.
Predicted declines in suitable habitat for greater one-horned rhinoceros (Rhinoceros unicornis) under future climate and land use change scenarios
Authors: Pant Ganesh , Maraseni Tek , Apan Armando , Allen Benjamin
Published: June 2021

Aim Rapidly changing climate is likely to modify the spatial
distribution of both flora and fauna. Land use change continues to alter
the availability and quality of habitat and further intensifies the
effects of climate change on wildlife species. We used an ensemble
modelling approach to predict changes in habitat suitability for an
iconic wildlife species, greater one-horned rhinoceros due to the
combined effects of climate and land use changes. Location Nepal.
Methods We compiled an extensive database on current rhinoceros
distribution and selected nine ecologically meaningful environmental
variables for developing ensemble models of habitat suitability using
seven different species distribution modelling techniques in the BIOMOD2
R package; and we did this under current climatic conditions and then
projected them onto two possible climate scenarios (SSP1-2.6 and
SSp5-8.5) and two different time frames (2050 and 2070). Results Out of
seven algorithms, random forest performed the best, and four
environmental variables — distance from grasslands, distance from
wetlands, annual precipitation, and slope, contributed the most in the
model. The ensemble model estimated the current suitable habitat of
rhinoceros to be 1,875 km2, about 1.3% of the total area of Nepal. The
future habitat suitability under the lowest and highest emission
scenarios was estimated to be: (1) 1,637 km2 and 1,417 km2 in 2050; and
(2) 1,562 km2 and 1,301 km2 in 2070, respectively. Main conclusions Our
results suggest that nearly one-third of the current rhinoceros habitat
would become unsuitable within a period of 50 years, with the predicted
declines being influenced to a greater degree by climatic changes than
land use changes. We have recommended several measures to moderate these
impacts, including relocation of the proposed Nijgad International
Airport given that a considerable portion of potential rhinoceros
habitat will be lost if the airport is constructed on the currently
proposed site.
Multiplicity of normalized solutions for p-Laplacian equation with critical growth in RN
Authors: Peng Xueqin
Published: June 2021

In this paper, we consider the following p-Laplacian equation     
−∆pu + |u|p−2u − λu = µ|u|q−2u +
|u|p∗−2u, in RN, u > 0, ∫ RNu2dx = a2,
where a,µ > 0, −∆pu = div(|∇u|p−2∇u),1
< p < N, λ ∈ R is an unknown parameter that appears
as a Lagrange multiplier, p < q
Cooperative Relationship between Teachers and Parents: Develop Learning Ability for Primary School Students during the Covid-19 Pandemic
Authors: Wibowo Dodiet Enggar , Mahmudi Ali , Retnawati Heri
Published: June 2021

Educators and students have suffered greatly from the Covid-19 pandemic. As a result of the Covid-19 pandemic, almost all of schools had to deactivate its activities. During the Covid-19 pandemic, the role of parents is very much needed in helping the learning process at home. This study aims to develop the learning abilities of elementary school students during the Covid-19 pandemic by establishing cooperative relationships between teachers and parents. Respondents of this study were 11 teachers and 8 parents. Confidential information from respondents, all answers and the identity given are kept confidential. The research design are exploratory case studies, data collection instruments with semi-structured interview methods, and Focused group Discussion (FGD). The data analysis in this study consisted of studying, categorizing, tabulating, combining empirical evidence to build initial propositions. The process of data collection and data analysis are carried out simultaneously which then continued after data collection is complete using intensive analysis methods and interactive models. The results of the research on the impact of Covid-19 showed that online learning are not effective compared to face-to-face learning in the classroom, the obstacles in online learning including unstable networks, and lack of parents’ ability to help explaining the material provided by the teacher. Good cooperation and communication between parents and teachers are the solution to optimize study from home.
Problem based learning dan Problem solving Berpengaruh Terhadap Kemampuan Pemecahan Masalah Matematika
Authors: Sampini Sampini , Mustaji Mustaji , Harwanto Harwanto
Published: June 2021

Rendahnya keterampilan menyelesaikan soal pemecahan masalah pada mata pelajaran matematika disebabkan karena guru kurang menggunakan model pembelajaran inovatif yang memudahkan siswa dalam belajar. Penelitian ini bertujuan untuk menganalisis perbedaan pengaruh model pembelajaran problem-based learning dan problem solving terhadap kemampuan pemecahan masalah ditinjau dari kemampuan berpikir kreatif siswa. Jenis penelitian ini yakni penelitian kuantitatif. Subjek penelitian berjumlah 143 siswa. Teknik pengumpulan menggunakan instrument berupa tes uraian. Data dianalisis melalui uji normalitas dan homogenitas, uji T, dan uji ANAVA. Hasil penelitian menunjukkan bahwa analisis kemampuan siswa ditinjau dari metode pembelajaran sebesar 0,577 ≥ 0,05, analisis kemampuan siswa ditinjau dari kemampuan berpikir kreatif, sebesar 0,000. Nilai signifikansi sebesar 0,000 ≤ 0,05, analisis interaksi antara metode pembelajaran dengan kemampuan berpikir kreatif sebesar 0,633 ≥ 0,05. Dapat disimpulkan tidak ada perbedaan kemampuan pemecahan masalah pada siswa yang mengikuti kelas PBL maupun kelas Problem solving, ada perbedaan kemampuan pemecahan masalah pada siswa yang memiliki kemampuan berpikir tingkat tinggi dengan yang rendah, dan ada interaksi antara PBL dan Problem solving terhadap kemampuan pemecahan masalah ditinjau dari kemampuan berpikir kreatif. Implikasi penelitian ini memberikan dampak pada kemampuan pemecahan masalah pada siswa menjadi meningkat.
Pengembangan Multimedia Sistem Tata Surya pada Muatan IPA
Authors: Putra Wahyu Permadi , Negara I Gusti Agung Oka
Published: June 2021

Kurangnya media pembelajaran yang membantu siswa dalam belajar membuat siswa sulit memahami materi pelajaran. Penelitian ini bertujuan untuk mendeskripsikan proses rancang  bangun dari produk Multimedia sistem tata surya dan mengetahui hasil validasi produk Multimedia sistem tata surya menurut hasil review para ahli dan uji coba perorangan. Penelitian pengembangan ini menggunakan model ADDIE (Analyzed, Design, Development, Implementation, Evaluation). Pengumpulan data menggunakan metode kuesioner. Analisis data menggunakan metode analisis deskriptif kuantitatif. Hasil analisis data yang diperoleh yaitu ahli isi muatan pelajaran IPA memperoleh skor 87,50 (sangat baik), ahli desain instruksional memperoleh skor 93,75 (sangat baik), ahli media pembelajaran memperoleh skor 91,66 (sangat baik) dan hasil uji coba perorangan memperoleh skor 92,30 (sangat baik). Berdasarkan hasil analisis data uji produk oleh para ahli dan hasil uji coba perorangan, dapat disimpulkan bahwa produk Multimedia sistem tata surya ini layak digunakan pada materi tata surya kelas VI. Implikasi penelitian ini adalah memberikan sebuah media pembelajaran inovatif yang dapat membantu siswa dalam belajar sehingga berdampak pada hasil belajar siswa yang meningkat.
Toposequent Effect on Soil Morphology and Classification of Ultisol Soil in the Ayer Hitam Forest Reserve, Peninsular Malaysia
Authors: Aditya Haidar Fari , Gandaseca Seca , Rayes Mochtar Lutfi , Karam Daljit Singh
Published: June 2021

Morphology in forest soils has developed over a long time due to the non-intensive management of forest soils. Damage to forest soil occurs when there is logging activity, fire, or land use change. Some forest was used as productive land for example agroforestry and forest production. As with landuse in agriculture, intensive management of forests can also reduce soil productivity. Inaccuracy forest land use would cause environmental or economic damage, so basic soil management data in forest areas is needed. However, the soil morphology of the Ayer Hitam Forest Reserve (AHFR) in  Malaysiahas never been observed. The objective of this study is to assess the soil characteristic and soil morphological properties of theAHFR.  Studying the characteristics of soil morphology in toposequent conditions is necessary to find out the differences in soil from different heights and the effects of erosion, transportation, and deposition on the soil. This study was conducted in the AHFR, Puchong, Selangor Darul Ehsan, Peninsular Malaysia. Mapping of the area under investigation was carried out by conventional soil survey techniques with a physiographic approach using maps with a scale of 1:30,000. The results showed that AHFRhas some different soil morphological characteristics and classification in subgroupamong five different slope positions with similar soil order, which is a Ultisol soil. The soil in the AHFRis formed from highly weathered soil due to high rainfall in this location.The results of this study are important for soil development, identification management, and land use priority such as erosion control on steep-slope forest areas, regeneration and reforestation, and it can also be used for forest education, practice, research, and training activities.Keywords: Ayer Hitam Forest Reserve, forest soil, soil morphology, toposequent, Ultisol soil
Bio-Polyurethane Resins Derived from Liquid Fractions of Lignin for the Modification of Ramie Fibers
Authors: Aristri Manggar Arum , Lubis Muhammad Adly Rahandi , Laksana Raden Permana Budi , Falah Faizatul , Fatriasari Widya , Ismayati Maya , Wulandari Asri Peni , Nurindah Nurindah , Ridho Muhammad Rasyidur
Published: June 2021

In this study, technical lignin from black liquor was used as a pre-polymer for the preparation of bio-polyurethane (Bio-PU) resins. Briefly, the isolated lignin was fractionated using ethyl acetate (EtAc) and methanol (MeOH). The liquid fractions of lignin, such as lignin-EtAc (L-EtAc) and lignin-methanol (L-MeOH), were mixed with 10% of polymeric isocyanate (based on the weight of liquid fractions) to obtain Bio-PU resins. The isolated lignin, fractionated lignin, and lignin-derived Bio-PU resins were characterized using several techniques. The obtained Bio-PU resins were then used to modify ramie fibers using vacuum impregnation method. Fourier Transform Infrared (FTIR) spectroscopy, Differential Scanning Calorimetry (DSC), and Thermogravimetric Analysis (TGA) revealed that the isolated lignin had quite similar characteristics to the lignin standard. Fractionation of lignin with EtAc and MeOH altered its characteristics. FTIR, DSC, and TGA showed that solid fractions of lignin had similar characteristics to lignin standard and isolated lignin, while the liquid fractions had characteristics from lignin and the solvents. The absorption band of isocyanate (−N=C=O) groups was shifted to 2285 cm−1 from 2240 cm−1 owing to the reaction with the −OH groups in lignin, forming urethane (R−NH−C=O−R) groups at 1605 cm−1 in Bio-PU resins. Thermal properties of Bio-PU resins derived from L-EtAc exhibited greater endothermic reaction compared to Bio-PU-L-MeOH. As a result, the free −N=C=O groups in Bio-PU resins have reacted with –OH groups on the surface of ramie fibers and improved its thermal properties. Modification of ramie fibers with Bio-PU resins improved the fibers’ thermal stability by 15% using Bio-PU-LEtAc for 60 min of impregnation.Keywords: Bio-polyurethane resins, Impregnation, Lignin fractions, Ramie fibers, Thermal stability