bluuebunny/crossref_metadata_2025 huggingface dataset:
Man Invades Nature: Tracing the dynamics and trends of anthropogenic stressors within a coastal wetland environment
Authors: Okyere Emmanuel Yeboah , Adu-Boahen Kofi , Dadson Ishmael Yaw , Boanu Nelson Yeboah , MENSAH BISMARK
Published: January 2022

The coastal areas contain some of the most valuable resources on earth that are constantly under threat due to human development. Notable among these resources are wetlands, a delicate but beneficial asset to the coastal dweller. This paper studied growth of Winneba city into the Muni Lagoon catchment as well as its associated effects on the ramsar site. The study used satellite images for the years 1990, 2000 and 2019 to model encroachment within the catchment over the 30- year period. Stakeholders were purposively selected and interviewed to gain insight into the subject under discussion. The study revealed that there is high rate of encroachment occurring within the lagoon catchment evidenced in the form of residential structures and agricultural activities. The rate of encroachment has almost quintupled within the period under study. These activities have led to some parts of the feeder streams of the lagoon drying up. The encroachment has been successful as a result of lack of clearly defined boundaries showing the extent of the wetland. The study recommends that all the stakeholder should come together and work with Wildlife Division of the Forestry Commission to establish boundaries of the wetland beyond which anthropogenic activities should not be allowed.
Influence of Multiwalled Carbon Nanotubes in Polytetrafluoroethylene on the Parameters of Electronic Structure and Absorption of UHF Radiation
Authors: Galstian Iryna , Tsapko Yevgen , Makarenko Olexiy , Yampolskiy A.L.
Published: January 2022

Using the methods of angular correlation of annihilation radiation, attenuation of electromagnetic radiation in 1.5–2 2 GHz frequency range, and optical ellipsometry, it was shown that a 2% decrease in the probability of annihilation of positrons in pores of free volume leads to changes in the parameters of electronic structure of composites by 15–25% in composites of polytetrafluoroethylene (PTFE) + multiwalled carbon nanotubes (MWCNTs). Polytetrafluoroethylene is transparent to electromagnetic radiation, but after the addition of 10 wt% multiwalled carbon nanotubes, the composite demonstrates a more than 400-fold decrease in the electromagnetic radiation intensity when the radiation passes through a specimen with a thickness of ≈2 mm. It was found that the average radius of the free volume pores and the probability of annihilation of positrons in this area are determined by the electronic structure parameters of the polymer matrix only. The Fermi angle and the probability of positrons annihilation with free electrons are determined by the electronic structure parameters of MWCNTs only. Since the electronic structure of the cores and defects of the polymer matrix (at least outside the interphase) does not change, changes in these characteristics are mainly due to changes in the MWCNTs electronic structure. It was found that in a specimen with 10 wt% MWCNTs, the highest density of free electrons is observed, and the highest electron density is observed on defects. The average of free volume pore radius reaches its maximum value at 10 wt% MWCNTs in the composite.
Prevalence, Sociodemographic Correlates and Associated factors of Somatoform and Whiteley Disorders among Internally Displaced Persons in Ogoja displacement settlements, Nigeria: A Cross-sectional Study
Authors: Ugbe Ugbe Maurice-Joel , Esu Ekpereonne Babatunde , Onwusaka Obiageli Chiezey , Bisongedam Marvin Muji , Efut Joseph Ajah , Ekpo Ofem Irom
Published: January 2022

Experiences of displacement have been associated with the prevalence of various mental health disorders owing to certain factors. This study aimed to identify the prevalence, sociodemographic correlates, and other factors associated with Somatoform and Whiteley disorders among internally displaced adults in Ogoja displacement settlements, Nigeria. This was a cross-sectional study of 335 respondents. Somatoform and Whiteley disorders were assessed using the SOM-SCL and Whiteley-7 sections of the Common Mental Disorder Questionnaire while a semi-structured questionnaire was used to collect data on sociodemographic and displacement-related factors. Data were analyzed using descriptive statistics, Chi-square, and multivariable logistic regression. The prevalence of somatoform and Whiteley disorders was 59.1% and 84.8% respectively. Factors found to be significant in each bivariate Chi-square analysis were modeled for each mental disorder. The multivariate analysis revealed that being married (AOR=2.80; p=0.02) prolonged displacement (AOR=3.29; p=0.003), discrimination (AOR=2.25; p=0.01), disease outbreak (AOR=1.92; p=0.03), loss of loved ones (AOR=1.34; p=0.028), overcrowded households (AOR=2.30; p=0.008), and fear of reprisals (AOR=2.05; p=0.026) were significantly associated with somatoform disorder. Younger ages, low income (AOR=5.43; p=0.006), longer duration of displacement (AOR=8.43; p=0.020), separation from family (AOR=4.19; p=0.004), and loss of loved ones (AOR=3.57; p=0.006) were significantly associated with Whiteley problems. The findings suggest that the high prevalence of the studied outcomes are related to many demographic factors, life stressors and events. A synergetic effort by different bodies in creating and routinely arranging mental health interventions for this population is recommended.
Research on Energy Consumption Evaluation of Electric Vehicle Considering Air Conditioning Energy Consumption
Authors: Li Ning , Liu Yingshuai , Zhang Junzhi , Li Chao , Ji Yuan , Liu Weilong
Published: January 2022

This article discusses how to accurately evaluate the whole vehicle energy consumption under different refrigeration and heating working states of electric vehicles. Firstly, using the actual driving test data of electric vehicle, the weight coefficients of electric vehicle under refrigeration, heating and uncooled heating were obtained by algorithm. Then, the above weight coefficient was combined with the drum test results to obtain the annual comprehensive 100km energy consumption value of the vehicle, at the same time, the comprehensive energy consumption value of 100km of the vehicle under different comfort control modes of electric vehicle was analyzed. The related vehicle tests were carried out, the simulation and experimental results showed that the weight coefficient obtained by the least square method can better reflect the real energy consumption of the whole vehicle, the evaluation method of 100km energy consumption of electric vehicle proposed in this paper is a feasible evaluation method.
Geochemical Characterization of Shale Deposits Around Afikpo Area, Southeastern Nigeria
Authors: Okonkwo Stellarmaris , Okunlola Olugbenga
Published: January 2022

The mineralogical and geochemical composition of shale sourced from Mamu and Nkporo Formations, around Afikpo area in south-eastern Nigeria, were investigated to evaluate the source rock composition/provenance, infer paleo-redox conditions, sedimentary cycle, maturity and the intensity of source area weathering. Dominant clay mineral in both formations is kaolinite. Plots of Al2O3 vs. SiO2, TiO2 vs. Al2O3, Th/Sc*100 vs. Zr/Sc, La – Th – Sc and Cr/V vs. Y/Ni with observed light rare-earth elements (LREE) enrichment and negative Eu anomalies (Eu/Eu*: 0.04 – 0.08 for Nkporo and 0.06 – 0.08 for Mamu Formation samples) indicates largely felsic sources provenance, supported by presence of kaolinitic mineral. The redox-sensitive trace element values (Mo, U, and V) suggest a marginal marine (oxic) environment for Mamu Formation shale but marine (oxic to anoxic) setting for Nkporo Formation, this was supported by U/Th and Ni/Co values as their ratios suggest that the depositional basin experienced oxic to anoxic depositional conditions. The characteristic moderate HREE depletion pattern with low GdN/YbN ratios for the investigated Afikpo shale indicates non- monazite accumulation in the samples. The sediments are mature according to values of ICV, ratios of Th/Sc and Zr/Sc. Plots of CIA vs. SiO2, ICV vs. CIA with Al2O3-(CaO + Na2O)-K2O signpost an intense weathering in the source area. There is insignificant differences between the weathering and sediment maturity for the shale sediments of both formations from the same sedimentary basins, however, there exist disparity in their source rock/provenance and redox settings justifying the different formations.
Paragenesis and precipitation stages of Nb-Ta-oxide minerals in phosphorus-rich rare-element pegmatites (Buranga dike, Rwanda)
Authors: Araujo Fernando Prado , Hulsbosch Niels , Muchez Philippe
Published: January 2022

Nb-Ta-oxide minerals (NTO) are commonly associated with rare-element pegmatites where they are interpreted to precipitate at magmatic to magmatic-hydrothermal conditions. Although high-temperature experiments show that phosphorus and other fluxing elements (e.g., Li, B, F) can affect the saturation of NTO in pegmatitic systems, it is still uncertain how NTO saturation occurs in natural, flux-rich pegmatitic melts and whether crystallization occurs at multiple stages during magmatic or subsolidus conditions. The lithium-cesium-tantalum (LCT) family P-rich Buranga granitic pegmatite (western Rwanda) is used as a type locality to address this question. NTO mineralization in the Buranga dike occurs in two mineralogical units: in mineralogically complex phosphatic nodules, and in albitized parts. In the phosphatic nodules, Fe-Nb-Ta-rich rutile and columbite-group minerals (CGM) are observed, while in the albitized parts, only CGM is found. Fe-Nb-Ta-rich rutile precipitates at the magmatic stage along with early primary phosphates (i.e., F-rich montebrasite, wyllieite, and fluorapatite). Conversely, CGM mineralization occurs at the magmatic-hydrothermal stage in association with replacement phosphates like bertossaite, after primary minerals (i.e., rutile, wyllieite, rosemaryite, and trolleite) are destabilized due to crystal-melt-fluid interactions. NTO textures and chemical zoning show uneven evolution from core to rim and are related to localized alteration phenomena of the surrounding minerals. This indicates that local processes and element transfers are more important than dike-scale fractionation processes for NTO mineralization in P-rich granitic pegmatites. The restricted availability of Fe and Mn in the system, which is related to the competition between phosphate and oxide minerals, is identified as the main control on the CGM mineralization in the Buranga dike. CGM precipitation is only possible during the magmatic-hydrothermal stage when Fe and Mn are leached from the primary phosphates and remobilized to the Nb-Ta-bearing residual melt by the exsolved fluid.
Runoff forecasting model based on CEEMD and combination model: a case study in the Manasi River, China
Authors: Lian Lian
Published: January 2022

Accurate forecasting of runoff is necessary for water resources management. However, the runoff time series consists of complex nonlinear and non-stationary characteristics, which makes forecasting difficult. To contribute towards improved forecasting accuracy, a novel combination model based on complementary ensemble empirical mode decomposition (CEEMD) for runoff forecasting is proposed and applied in this paper. Firstly, the original runoff series is decomposed into a limited number of intrinsic mode functions (IMFs) and one residual based on CEEMD, which makes the runoff time series stationary. Then, approximate entropy is introduced to judge the complexity of each IMF and residual. According to the calculation results of approximate entropy, the high complexity components are predicted by Gaussian process regression (GPR), the medium complexity components are predicted by support vector machine (SVM), and the low complexity components are predicted by autoregressive integrated moving average model (ARIMA). The advantages of each forecasting model are used to forecast the appropriate components. In order to solve the problem that the forecasting performance of GPR and SVM is affected by their parameters, an improved fireworks algorithm (IFWA) is proposed to optimize the parameters of two models. Finally, the final forecasting result is obtained by adding the forecasted values of each component. The runoff data collected from the Manasi River, China is chosen as the research object. Compared with some state-of-the-art forecasting models, the comparison result curve between the forecasted value and actual value of runoff, the forecasting error, the histogram of the forecasting error distribution, the performance indicators and related statistical indicators show that the developed forecasting model has higher prediction accuracy and is able to reflect the change laws of runoff correctly.
Assessment of the groundwater quality by using multivariate approach and non-carcinogenic risk of uranium in the inhabitants of the Bastar district, Chhattisgarh, Central India
Authors: Singh Mayank , Sahu Pokhraj , Tapadia Kavita , Jhariya Dalchand
Published: January 2022

The elevated levels of uranium found in 17 states of India is alarming due to the radionuclide contamination in groundwater. Chronic ingestion can cause potential harm to humans and living things such as damage to kidneys, and cancer of the liver, lungs, and bones. The present study was undertaken to assess groundwater quality using a multivariate approach to the non-carcinogenic exposure of uranium by residents of the Bastar district, Chhattisgarh. The concentration of uranium in groundwater samples ranged from 0.50–26.4 μg/l in 70 samples, with 82% of samples being beyond the recommended limits by the International Commission on Radiological Protection. Hierarchical cluster analysis divided all sampling locations into 10 clusters explaining the similarity of geological conditions. Factor analysis extracted four principal components or factors with 70.20% cumulative variance from the entire data set. Chronic daily intake has been found above from the reference dose as 34.29, 42.86, and 51.43% for young children, children and adults. The results of hazard quotient analysis classified the degree of non-carcinogenic risk which was >1 in 34.28, 45.71, and 41.43% for the samples from young children, children and adults, respectively. This study will generate baseline data and suggest the need for revision of water quality monitoring plans and preventive water management practices.
The situation of management research in Peru. A bibliometric analysis in the Bicentennial
Authors: Ortigueira-Sánchez Luis Camilo , Risco-Martínez Santiago Luis
Published: January 2022

In 2021, Peru celebrated 200 years of independence, marking an important milestone in its history, which leads us to the following question: In these 200 years, how much progress has been made in business studies in Peru? We found bibliometric analysis to be the most appropriate method to answer this question. The software used to analyze the interrelationships between articles was Vosviewer, a software that allows the creation and visualization of bibliometric networks. Using the search terms "Peru" and "Business", we retrieved 908 articles from the Scopus Database.
The role of surgical treatment in stage IV adrenocortical cancer
Authors: Temnyy A. S. , Kazantsev A. P. , Kerimov P. A. , Rubanskaya M. V. , Varfolomeeva S. R.
Published: January 2022

Introduction. Adrenal cortical carcinoma (ACC) is a rare cancer with a very poor prognosis. Surgery remains the best treatment modality for adrenocortical carcinoma in the early stages. The appropriate treatment for metastatic ACC is not well established, and the effectiveness of chemotherapy and radiotherapy, is not proven. Five-year survival for patients with stage IV tumors ranged from 0 to 17 %. The data regarding the effectiveness of surgery in the management of metastatic tumor remain scarce.Aim of the study – to present our results of surgical treatment for metastatic ACC in children and to determine the risk factors of local relapse.Materials and methods. The results of treatment of 10 patients with a median age of 5.8 (1.5–15.1) years with stage IV ACC were retrospectively analyzed. The tumors were hormone-producing in 6 of 10 cases. Four (40 %) patients experienced a Cushing syndrome. Primary tumor resection R1 and R0 was performed in 8 (80 %) and 5 (50 %) patients respectively. The median volume of resected tumor was 183 (3.6–1608) cm3. All patients received mitotane combined in 80 % with systemic chemotherapy consisted of etoposide, doxorubicin, cisplatin (EDP-M).Results. Two (20 %) of 10 patients are alive with tumor in 14.1 and 28.8 months respectively. The median follow-up in the hole group was 21.8 (10.4–33.9) months and the median period to disease progression was 11.3 (6.4–17.9) months. The risk of local relapse in the first 8 months after surgery was 33.3 % vs. 100 % in R0 and R1/R2 groups respectively. The period from diagnosis to death from tumor progression was significantly longer in 7 patients with 2 and more EDP-M courses compared to 3 patients who received one EDP-M or no further treatment (24.9 vs. 14.4 months, p = 0.02). Two and five-year overall survive were 57.1 % and 0 % respectively.Conclusion. The radical surgical resection (R0) significantly reduced the risk and incidence of local relapse in children with stage IV ACC. Adjuvant EDP-M therapy did not affect the unfavorable prognosis of the disease, but positively influenced life expectancy of patients with disseminated ACC.
Blinatumomab in acute lymphoblastic leukemia treatment: features of therapy organization, supplement issues and therapy-related toxicity. Literature review and own experience
Authors: Batmanova N. A. , Valiev T. T. , Kirgizov K. I. , Varfolomeeva S. R.
Published: January 2022

Acute lymphoblastic leukemia is the most common tumor of childhood. Using of modern treatment chemotherapy regimens, we can reach about 90 % of 5-year survival. An important problem – patients with relapses of the disease, as well as children with the persistence of minimal residual disease (MRD), which is absolutely necessary in hematopoietic stem cell transplantation aspects. The possibilities of continuous intensive chemotherapy are limited by high toxicity, and therefore targeted drugs are used to achieve MRD-negative remission in children, in particular, a bispecific antibody – blinatumomab.This article presents our own experience of using blinatumomab in patients using various financial sources, the technical features of using within the federal medical center. Also, undesirable effects of the drug and their therapy are mentioned.
Effect and Mechanism of the Lenvatinib@H-MnO2-FA Drug Delivery System
in Targeting Intrahepatic Cholangiocarcinoma
Authors: Ning Zhouyu , Yang Lina , Yan Xia , Wang Dan , Hua Yongqiang , Shi Weidong , Lin Junhua , Meng Zhiqiang
Published: January 2022

Background:

To investigate the effects of the Lenvatinib@H-MnO2-FA administration system on
the proliferation and apoptosis of Intrahepatic cholangiocarcinoma (ICC) and the underlying molecular mechanism.

Materials and Methods:

In this research, hollow MnO2 (H-MnO2) was synthesized via the modified Stöber
method, and H-MnO2 was modified with polyethylene glycol-bis (Amine) (NH2-PEG-NH2) and folic acid (FA)
to obtain H-MnO2-PEG-FA (H-MnO2-FA). Lenvatinib was coated in the hollow cavity of H-MnO2-PEG-FA to
further form a nanometre drug-carrying system (Lenvatinib@H-MnO2-PEG-FA). Lenvatinib@H-MnO2-FA
was characterized through transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
Fourier transform infrared spectroscopy (FT-IR) was used to verify that Lenvatinib was loaded on nanoparticles.
Functionally, confocal laser scanning microscopy (CLSM), 2-(4-Amidinophenyl)-6-indolecarbamidine dihydrochloride
(DAPI) staining, and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay
were performed to determine the effect of Lenvatinib@H-MnO2-FA on the proliferation and apoptosis of ICC
cells (9810 cells). Finally, the protein levels of Raf-1MEK1/2-ERK1/2 signalling pathway components were detected
through Western blotting analysis.

Results:

We successfully synthesised a Lenvatinib@H-MnO2-PEG-FA administration system. The resulting
nanomaterials had excellent biological stability and improved targeting effects. Functionally, Lenvatinib@
H-MnO2-FA inhibited the proliferation of 9810 cells. The Bcl-2 protein level was significantly downregulated,
and the caspase-3 protein level was significantly upregulated, indicating that Lenvatinib@H-MnO2-
PEG- FA promoted the apoptosis of 9810 cells. Mechanistically, Lenvatinib@H-MnO2-FA increased the phosphorylation
levels of Raf, MEK1/2, and ERK1/2.

Conclusions:

H-MnO2-FA can more effectively deliver Lenvatinib to inhibit proliferation and promote apoptosis
in ICC, which could be the promising drug delivery nano-vehicles for delivery drugs.
The Advances in Bioactivities, Mechanisms of Action and Structural Optimizations of Matrine and its Derivatives
Authors: Lv Min , Xu Hui , Xu Jianwei
Published: January 2022

Matrine, a tetracyclo-quinolizidine alkaloid, is isolated from the industrial crop plant Sophora flavescens. Due to a wide range of pharmacological and agricultural properties, the research on the phytochemistry, pharmacology, toxicology, and mechanisms of action of matrine and its derivatives has received much attention. On the other hand, to improve their biological activities, the study on structural optimizations and structure-activity relationships of matrine and its derivatives has also attached more and more importance. In this review article, the updates regarding the advances in bioactivities, mechanisms of action, structural modifications, and structure-activity relationships of matrine and its derivatives from 2017 to 2020 are presented. We hope that this review will provide a reference for the development and application of matrine and its derivatives as drugs or pesticides in the future.
Breviscapine Combined with BMSCs Reduces Aβ Deposition in Rat
with Alzheimer's Disease by Regulating Circular RNA ciRS-7
Authors: Huang Wei , Sun Fengqin , Zhang Yulin , Wu Xinran , Xu Xu , Zhu Chaodie
Published: January 2022

Aims:

This study aimed to clarify that breviscapine combined with bone
marrow mesenchymal stem cells (BMSCs) treatment can reduce Aβ deposition in
Alzheimer's disease (AD) patients.

Background:

AD is a common degenerative disease of the central nervous system. Aβ
protein deposition in the cerebral cortex and hippocampus causes neuronal peroxidation
damage, synaptic dysfunction, neuroinflammation, and nerve cell apoptosis, and
ultimately leads to AD.

Objective:

To investigate whether breviscapine combined with BMSCs treatment can
reduce Aβ deposition in AD.

Metchods:

The AD rat model was successfully induced by Aβ1-42. The expression of
protein and mRNA was detected by western blot and reverse transcription-quantitative
PCR (RT-qPCR), respectively.

Results:

In AD rat brain tissue, the expression of circular RNA ciRS-7 (ciRS-7), ubiquitin
carboxyl-terminal hydrolase L1 (UCHL1), and NF-kappaB p65 was significantly
downregulated, and the expression of β-amyloid precursor protein (APP), β-site APPcleaving
enzyme 1 (BAEC1), and Aβ was upregulated. The expression of ciRS-7,
UCHL1, and p65 was significantly upregulated after breviscapine or BMSCs treatment,
and there was increased APP and BAEC1 degradation. Notably, breviscapine combined
with BMSCs treatment was more effective than either treatment alone. In SH-SY5Y
cells, overexpression of ciRS-7 reduced Aβ deposition by upregulating UCHL1 to
degrade APP and BAEC1, but these effects were reversed with inhibition of NF-kB
signaling. Finally, knockdown of ciRS-7 elevated Aβ, APP, and BAEC1 expression in
each group of rats compared with the control.

Conclusion:

Breviscapine combined with BMSCs treatment can reduce Aβ deposition in
AD rats and promote the degradation of APP and BAEC1 by activating NF-kB to
promote UCHL1 expression.
Assessment of the potentials of solar energy and radiation at the Islamic University of Medina
Authors:   Department of Electrical Engineering, Faculty of Engineering, Islamic University in Madinah, Saudi Arabia, et al. Draou
Published: January 2022

The availability of radiation measurements is an essential factor in the evaluation of solar potential when a photovoltaic plant is to be installed. This paper addresses an assessment of the measurements and analysis of solar radiation in Medina, Saudi Arabia. The actual measurements are taken from a meteorological station located on the roof of the Engineering laboratory building at the Islamic University in Medina, KSA. The obtained results are satisfactory and prove the reliability of the constructed numerical models.
Неупругое рассеяние света самосформированными линейно-цепочными агрегатами углеродных атомов в островковых пленках золота
Authors: Компан М.Е. , Коньков О.И. , Никитин С.Е. , Анкудинов А.В.
Published: January 2022

The study of the optical response of gold island films revealed an intense line in the light scattering spectrum near 2100 cm-1. Some possible reasons for the appearance of this line are considered. Comparison of the results obtained for films obtained by various technologies, light scattering spectra on other types of samples, as well as comparison with the results of other authors allow us to interpret the line as the result of inelastic light scattering by one-dimensional carbon chains.
Protective Effect of Phragmitis Rhizoma against Oxidative Stress-induced DNA Damage and Apoptosis in Chang Liver Cells
Authors: Lee Hui yeong , Hong Sang hoon , Park Sang eun
Published: January 2022

Objectives: Phragmitis Rhizoma is the fresh or dried rhizome of Phragmites communis Trin., which has been prescribed in traditional Korean medicine to relieve fever and vomiting and to nourish the body fluids. Recently, the protective effect of Phragmitis Rhizoma extract or its components on myelotoxicity and inflammatory responses have been reported, but no study has yet been conducted on oxidative stress.Methods: The present study investigated whether an ethanol extract of Phragmitis Rhizoma (PR) could protect against cellular damage induced by oxidative stress in Chang liver cells.Results: Pretreatment with PR significantly suppressed the hydrogen peroxide (H2O2)-induced reduction of Chang cell viability and generation of reactive oxygen species (ROS), thereby deferring apoptosis. PR also markedly inhibited H2O2-induced comet tail formation and phospho-γH2AX expression, suggesting that PR protected against oxidative stress–mediated DNA damage. PR also effectively prevented the inhibition of ATP synthesis in H2O2-treated Chang cells by inhibiting the loss of mitochondrial membrane potential, indicating that PR maintains energy metabolism through preservation of mitochondrial function while eliminating ROS generated by H2O2. Immunoblotting results indicated that PR attenuated the H2O2-induced downregulation of Bcl-2 and upregulation of Bax expression.Conclusions: PR protects against oxidative injury in Chang liver cells by regulating energy homeostasis via ROS generation blockade, which is at least partly mediated through inactivation of the mitochondria-mediated apoptosis pathway.
Faster quantum and classical SDP approximations for quadratic binary optimization
Authors: G.S L. Brandão Fernando , Kueng Richard , Stilck França Daniel
Published: January 2022

We give a quantum speedup for solving the canonical semidefinite programming relaxation for binary quadratic optimization. This class of relaxations for combinatorial optimization has so far eluded quantum speedups. Our methods combine ideas from quantum Gibbs sampling and matrix exponent updates. A de-quantization of the algorithm also leads to a faster classical solver. For generic instances, our quantum solver gives a nearly quadratic speedup over state-of-the-art algorithms. Such instances include approximating the ground state of spin glasses and MaxCut on Erdös-Rényi graphs. We also provide an efficient randomized rounding procedure that converts approximately optimal SDP solutions into approximations of the original quadratic optimization problem.
MATHEMATICS ANXIETY AND ITS EFFECTS ON ENGINEERING STUDENTS’ PERFORMANCE DURING THE COVID 19 PANDEMIC
Authors: Mendoza Velazco Derling Jose , Flores Hinostroza Elizeth Mayrene , Cejas Martínez Magda Francisca , Liccione Edith Josefina
Published: January 2022

The research objective was to describe the levels of anxiety and their effects on performance manifested by the mathematics students of the engineering faculty of the National University of Chimborazo UNACH during the 2020-1 academic semester. The study is in the quantitative paradigm with a descriptive exploratory design. The total sample consisted of 120 students studying mathematics, which are at different levels and careers of the engineering faculty. The sample selection was of an intentional non-probabilistic type and had as inclusion criteria not having been diagnosed with an anxiety disorder. The Brief Anxiety Situations and Responses Inventory was applied (ASRI-B). The ASRI-B was sent to students by email to facilitate data collection. The two-factor ANOVA (mathematics and comprehension) uses to analyze the research results. It's allowed to find statistically significant differences in the grasp of the contents presented by the teachers in a virtual way for the cognitive and physiological response system and the general level of anxiety, as well as in situational areas of evaluation anxiety and anxiety in everyday situations, during the academic closure in the quarantine season due to the COVID-19 pandemic.
Impactos de la Religiosidad y la Orientación Política de Consumidores Mexicanos Sobre el Valor Percibido
Authors: Alvarado-Herrera Alejandro , Cavazos-Arroyo Judith
Published: January 2022

Introducción. En un entorno cada vez más competitivo las organizaciones necesitan identificar variables clave que pueden influir en la decisión y el comportamiento de compra de los consumidores. Por ello, el objetivo de esta investigación fue: analizar la influencia de la religiosidad y la orientación política sobre el valor utilitario, emocional y social percibidos atribuidos por los consumidores a los productos y servicios ofrecidos por empresas socialmente responsables. Materiales y métodos. Se realizó una investigación cuantitativa aplicándose una encuesta personal a 528 consumidores. Resultados Se encontró que el nivel de religiosidad influye en las tres dimensiones del valor percibido, donde, a mayor nivel de religiosidad de los consumidores, mayor el valor percibido atribuido a los productos y servicios en cuestión. Sin embargo, el nivel de religiosidad influye en las tres dimensiones del valor percibido. Sin embargo, la orientación política influye solamente en el valor emocional, tanto en consumidores autodefinidos como de izquierda como de derecha. Conclusiones. Los hallazgos pueden ayudar a los tomadores de decisiones de marketing de las empresas a saber que el nivel de religiosidad y la orientación política de sus consumidores, tanto potenciales como actuales, pueden, de hecho, tener un impacto en el valor percibido de los consumidores sobre sus ofertas y deben tenerse en cuenta en la creación de sus estrategias, campañas y mensajes.
Agricultores Tradicionales Produciendo para el Mercado Agroexportador. Causas y Consecuencias de Dicho Cambio Productivo
Authors: Barajas-Gamboa Jaime Alejandro , Méndez-Sastoque Marlon Javier
Published: January 2022

Introducción. En el municipio de El Peñol, Antioquia, la incursión de pequeños y medianos productores al mercado agroexportador de la gulupa (Passifflora edulis Sims) es hoy una realidad reconocida, que, asumida como caso de estudio, permite aportar a la comprensión de un fenómeno particular: el tránsito de agricultores tradicionales-locales hacia la producción para el mercado internacional, asunto sobre del que versa el presente estudio. Objetivo. Identificar y analizar las causas y consecuencias de la incursión de pequeños y medianos productores de El Peñol, Antioquia, al mercado agroexportador de la gulupa. Materiales y métodos. La investigación, de índole cualitativa, se centró en analizar las múltiples narrativas expuestas por los propios actores localmente asociados al cultivo de gulupa sobre las causas y consecuencias del fenómeno estudiado. La información se recolectó mediante entrevistas a profundidad, posteriormente analizadas en su contenido. Resultados. Entre las causas de la incursión al mercado global destacan las ventajas ofrecidas por el cultivo ante la inestabilidad de los precios de los productos tradicionales, el conocimiento previo de la especie y la oportunidad de tránsito hacia una agricultura más limpia. Entre las consecuencias, el mejoramiento de las condiciones socioeconómicas familiares, la reafirmación de la vocación agrícola de pequeños y medianos productores y la alta dependencia de la intermediación realizada por las empresas agroexportadoras. Conclusiones. Las causas y consecuencias del cambio productivo presentan un carácter multidimensional y ambivalente, situación que induce a explorar el fenómeno más allá de su dimensión económica, dando cuenta, simultáneamente, de sus bondades y riesgos.
Measurement of absorbed dose rate in water phantom maintained at body temperature by 60Co irradiator – comparison of experimental results and Monte Carlo simulation
Authors: Kye Yong-Uk , Kim Hyo-Jin , Lee Ji-Eun , Seo Yun-Jae , Kim Jung-Ki , Jo Wol-Soon , Lee Dong-Yeon , Kang Yeong-Rok
Published: January 2022

To analyze the biological effects of radiation, it is important that the
conditions of in vitro experiments match closely with those of in vivo
experiments. In this study, we constructed an irradiation system to
conduct irradiation experiments under conditions similar to those of in vivo
experiments. The Dongnam Institute of Radiological and Medial Sciences has a
gamma irradiator including 60Co radioisotope for research purposes and
accreditation for standard calibration of the ion chamber. The temperature
of the water phantom was maintained the same as that of the normal human
body, and the physical dosimetry was carried out accurately using the ion
chamber with traceability. We report the measurement of lateral profiles,
depth profiles, and absorbed dose rate in water, Dw, at the irradiation
location of the blood samples using a farmer-type ion chamber. We simulated
the source, collimator, irradiator, phantom, and extra structure of the
gamma irradiation system using the Monte Carlo code and compared the
simulated and the experimental results. The experimentally and theoretically
evaluated dose rates were 0.2975 ? 0.0055 Gymin?1 (at coverage factor k =
2) and 0.2978 ? 0.0052 Gymin?1 (at coverage factor k = 2) at
source-to-surface distance of 100 cm and 5 gcm?2 depth in the water phantom,
respectively. Blood irradiation will be conducted in vitro, under conditions similar to in vivo conditions, to provide the dose-response curve
based on dosimetry with traceability.
Sialoliths of Submandibular Gland and Wharton’s Duct: Orthopantomography
Authors: Demidov Valentyn , Khrulenko Serhii
Published: January 2022

Orthopantomography (OPG), which is also known as panoramic radiography, pantomography, and panoramic imaging, proved its efficacy in infection, trauma, jaw lesions, tumor cases, etc. Calcification of the soft tissues in perimaxillary and perimandibular regions can also be visualized on OPG images. Reports clearly
showed sialolith occurrence in the parotid gland in 10%, in submandibular gland in 83%, and in sublingual and minor salivary glands in 7%. Typically, sialoliths are visualized on the panoramic radiographs as radiopaque lesions. They are of round or oval shape, cylindrical or irregularly-shaped calcifications. Only in limited cases, sialoliths can be X-ray negative. The research data shows – from 10 to 20% the salivary stones are radiolucent.
Digital OPG combines a lot of advantages. In summary, digital orthopantomography proved its efficacy in diagnostics of sialoliths located in the submandibular gland and its duct. Simultaneously, OPG is more than useful for diagnosis establishment and control of treatment for neighboring specialties.
The composition of patients older than working age taken to the hospital for diseases of the circulatory system
Authors: Shlyafer S. I.
Published: January 2022

The article analyzes information about patients older than working age, delivered to the hospital for emergency indications, including emergency medical teams, for diseases of the circulatory system in the Russian Federation for 2010–2019. Over 10 years in the country, there has been an increase in the proportion of patients older than working age with diseases of the circulatory system, admitted on an emergency indications to the hospital, from 43,65 to 53,0%, including by emergency medical teams — from 47,2 to 49,1%.
A posteriori estimate of the impact of business activity on the reputation capital of the region
Authors: EL'SHIN Leonid A. , BURGANOV Rafis T. , ABDUKAEVA Aliya A.
Published: January 2022

Subject. This article analyzes the involvement of regional socio-economic systems in national and global reproduction processes.
Objectives. The article aims to determine the relationship between the region's reputation, its business activity, and macroeconomic parameters of the region's development.
Methods. For the study, we used the empirical methods of research.
Results. The article presents a model that reveals the dependence of the region's reputation on its business activity, and it also offers a concept of regional management, taking into account the provisions of the theory of reputation economics.
Conclusions. The article concludes that the reputation capital index is the most important indicator of the effectiveness of strategic management of the region.
PERANCANGAN APLIKASI PEMANTAUAN PENJUALAN DENGAN KEAMANAN SINKRONISASI DATA DENGAN WEB SERVICE PADA CV. SURYA MULTI KARYA
Authors: Sandy Mardian Puli , Tony Tony
Published: January 2022

Aplikasi yang dirancang adalah aplikasi pemantauna penjualan pada CV. Surya Multi Karya, yaitu aplikasi yang berbasisi aplikasi desktop dan website. Pada saat ini CV. Surya Multi Karya memiliki satu cabang yang tempatnya berjauhan dengan toko pusat. Aplikasi desktop akan digunakan untuk melakukan segala transaksi yang terjadi pada CV. Surya Multi Karya yang berupa transaksi penjualan dan peng-input-an data barang yang masuk dan keluar, sedangkan website  bertujuan untuk menunjukan report dari hasil penjualan dan stok barang pada CV. Surya Multi Karya. Pada aplikasi ini menggunakan web service yang di dalam terdapat WCF yang dimana berguna untuk mensinkronisasikan data pada database agar dapat digunakan oleh CV. Surya Multi Karya.
APLIKASI MOBILE DAN WEB VIDEO CONFERENCING (KOLABORASI)
Authors: Novantarius Nofantarius
Published: January 2022

Aplikasi yang dikembangkan adalah aplikasi mobile dan web video conferencing. Memiliki fitur video conference untuk mempermudah komunikasi, real-time chatting memudahkan viewer mengajukan pertanyaan, file sharing untuk upload dan download file, dan location sharing untuk mengetahui lokasi dari user yang terhubung. Sistem dikembangkan dengan menggunakan Quickblox API, Cordova Framework, NodeJS, Heroku Toolbelt untuk terhubung dengan server heroku, serta SQLite DB Browser untuk pembuatan database. Pengujian telah dilakukan pada setiap modul yang ada pada aplikasi menggunakan Blackbox Testing, pengujian delay time, pengujian audio dan pengujian lokasi. Pada pengujian delay time, rata-rata delay time dari total waktu pengujian selama 80s dengan bandwith 10 Mbps adalah 114.1 ms dan masih tergolong dalam kategori kualitas baik. Pengujian audio, terhadap 11 user, didapat hasil kualitas suara akan terdengar kecil apabila tidak menggunakan bantuan headset. Pengujian lokasi sudah dapat berfungsi dengan baik karena lokasi yang ditampilkan dari aplikasi sudah mendekati lokasi yang sebenarnya dari user yang terhubung.
De Genova, N. y Tazzioli, M. (Eds.) (2021). Europa / crisis. Nuevas palabras clave en la ‘crisis’ en y de ‘Europa’. Madrid: Los Libros de la Catarata.
Authors: Abreu Colombri José Antonio
Published: January 2022

Propuesta de reseña
Agentes, no víctimas. Estrategias de periodistas para evadir las agresiones no físicas en Baja California
Authors: Merchant Diana Denisse
Published: January 2022

En.

The nuances and consequences of the structural precariousness of Mexican journalism vary with the region. Attacks on journalists by power groups (in- cluding public officials, politicians, and business and media owners) in the northwest of the country appear to be one of the many problems linked to its economic, socio-cultural and political instability. In Baja California, journalists practice their profession under constant threat of economic, ethical and psychological attack, obliging them to regard the phenomenon in one of two ways: as a naturalized aspect of their profession and there- fore inherent to it; or as a trigger for creating strategies to circumvent it, including adapting aspects of their professional journalistic lives. The topic is relevant because the classifica- tion and differentiation of attacks has not been explored by Mexican studies on the press and power, apart from identifying and defining the structural violence and investigating physical attacks against journalists (murders, assaults and “express kidnappings”). By way of a four-month ethnographic study of the union of journalists from the five municipalities of Baja California and 25 interviews with journalists, editors, heads of information, public officials, politicians and business owners, this paper analyzes the strategies employed by print journalists to cope with abuses. Having another job concurrently (within or without journalism); publicly proving who is trying to influence them; and maintaining union and solidarity among colleagues when publishing sensitive news are all strategies employed to counter attacks. In this journalistic world, those who employ these strategies become agents and not victims of the structural precariousness that has developed in Baja California over the better part of a century.
Program Stimulasi Kesiapan Anak Masuk Sekolah Dasar Bagi Orang Tua di Kelurahan Jetaksari Kecamatan Sayung Kabupaten Demak
Authors: Agustina Setiowati Erni , Handayani Agustin , Supradewi Ratna
Published: January 2022

Program pendampingan ini bertujuan untuk meningkatkan pengetahuan orang tua dalam memberikan stimulasi yang tepat agar anak usia 6-7 tahun siap memasuki sekolah dasar. Pada saat berada di taman kanak-kanak (TK), guru TK memberikan berbagai stimulasi diantaranya keterampilan motorik halus dan kasar, kemampuan mengenali objek dan kegunaanya, bersosialisasi, mengenal moral sesuai usianya serta menghitung benda. Disamping itu, orang tua memberikan stimulasi yang mengarah pada aktivitas yang ditujukan agar anak cepat beradaptasi dengan tugas akademik di sekolah dasar. Akan tetapi, tidak jarang orang tua kemudian lebih menekankan anak lancar menulis, membaca, dan berhitung.  Padahal dalam kesiapan masuk sekolah juga harus memperhatikan kesiapan fisik dan motorik, emosi, sosial, bahasa, dan ketertarikan untuk belajar. Sebanyak 29 orang tua anak TK (RA) Al Khusaini mengikuti kegiatan ini dan untuk mengetahui kesiapan anak masuk sekolah dilakukan Tes Kesiapan Sekolah menggunakan NST (Nijmeegse Schoolbekwaamheids Test) terhadap 15 anak usia 5,0 sampai 5,9 tahun dari total 29 anak TK B. Hasil tes NST menunjukkan ada 7 anak berada pada kategori siap dan sisanya belum siap, selain itu orang tua diberi angket pengetahuan mengenai kesiapan anak masuk sekolah. Data menunjukkan bahwa sebagian besar orang tua memandang melatih kemampuan membaca, menulis dan berhitung yang paling penting sehingga lebih menekankan aspek ini dalam menstimulasi. Hasil pengabdian masyarakat ini diketahui bahwa orang tua setelah kegiatan pendampingan mengetahui aspek-aspek kesiapan anak masuk sekolah dan cara-cara menstimulasinya yang akan mendukung keberhasilan anak belajar di SD.
Robust dicopper(I) µ-boryl complexes supported by a dinucleating naphthyridine-based ligand
Authors: Ríos Pablo , See Matthew S. , Handford Rex C. , Tilley T. Don
Published: January 2022

Copper boryl species have been widely invoked as reactive intermediates in Cu-catalysed C−H borylation reactions, but their isolation and study have been challenging. Use of the robust dinucleating ligand DPFN (2,7-bis(fluoro-di(2-pyridyl)methyl)-1,8-naphthyridine) allowed for the isolation of two very thermally stable dicopper(I) boryl complexes, [(DPFN)Cu2(µ-Bpin)][NTf2] (2) and [(DPFN)Cu2(µ-Bcat)][NTf2] (4) (pin = 2,3-dimethylbutane-2,3-diol; cat = benzene-1,2-diol). These complexes were prepared by cleavage of the corresponding diborane via reaction with the alkoxide [(DPFN)Cu2(µ-OtBu)][NTf2] (3). Reactivity studies illustrated the exceptional stability of these boryl complexes (thermal stability in solution up to 100 °C) and their role in the activation of C(sp)−H bonds. X-ray diffraction and computational studies provide a detailed description of the bonding and electronic structures in these species, and suggest that the dinucleating character of the naphthyridine-based ligand is largely responsible for their remarkable stability.
Кар’єрне зростання державного службовця в умовах модернізації публічного адміністрування в Україні
Authors: Барановська Тетяна Василівна , Бідюк Тетяна Анатоліївна
Published: January 2022

У статті здійснено науково-теоретичний аналіз службової кар’єри як адміністративно-правової категорії, визначено напрями розвитку державної служби в умовах реформування публічного управління в Україні. Проаналізовано сучасний стан і проблеми модернізації державної служби та управління людськими ресурсами, відповідно до європейських стандартів, де пріоритетними напрямами є модернізації державної служби й управління людськими ресурсами. Досліджено нові підходи, інструменти для забезпечення державної служби, визначені стратегією реформування в Україні, це дозволяє зауважити, що нововведення, передбачені проєктом Закону України «Про державну службу» більш відповідають сучасним викликам.
Exploration of Teaching and Education: Integration of Sports and Medicine in Physical Education in Colleges and Universities
Authors: Chao Yuhan , Guo Xiucheng , Wang Rui
Published: January 2022

Based on the concept and definition of “integration of sports and medicine,” this paper analyzes the current situation of the integration, where it lacks innovative physical education curriculum content and physical education teachers with conventional medical professional knowledge; in addition, physical education disciplines with medical characteristics are not highlighted. Therefore, relevant measures are put forward for reference and discussion.