bluuebunny/crossref_metadata_2025 huggingface dataset:
Mineralogy and Distribution of REE in Oxidised Ores of the Mount Weld Laterite Deposit, Western Australia
Authors: Cook Nigel J. , Ciobanu Cristiana L. , Wade Benjamin P. , Gilbert Sarah E. , Alford Robert
Published: May 2023

The Mount Weld rare earth element (REE) deposit, Western Australia, is one of the largest of its type on Earth. Current mining exploits the high-grade weathered goethite-bearing resource that lies above, and which represents the weathering product of a subjacent carbonatite. The mineralogy, petrography, deportment of lanthanides among the different components, and variation in mineral speciation, textures, and chemistry are examined. Microanalysis, involving scanning electron microscope (SEM) imaging, electron probe microanalysis (EPMA) and laser ablation inductively coupled-plasma mass spectrometry (LA-ICP-MS), was conducted on sized fractions of three crushed and ground laterite ore samples from current and planned production, and a representative sample from the underlying carbonatite. High-magnification imaging of particles in laterite samples show that individual REE-bearing phases are fine-grained and extend in size well below the micron-scale. Nanoscale inclusions of REE-phosphates are observed in apatite, Fe-(Mn)-(hydr)oxides, and quartz, among others. These have the appearance, particularly in fluorapatite, of pervasive, ultrafine dusty domains. Apart from the discrete REE minerals and abundant nano- to micron-scale inclusions in gangue, all ore components analysed by LA-ICP-MS contain trace to minor levels of REEs within their structures. This includes apatite, where low levels of REE are confirmed in preserved igneous apatite, but also Fe- and Mn-(hydr)oxides in which concentrations of hundreds, even thousands of ppm are measured. This is significant given that Fe-(Mn)-(hydr)oxides are the most abundant component of the laterite and points to extensive mobility and redistribution of REEs, and especially HREE, during progressive lateritisation. Late-formed minerals, notably tiny grains of cerianite, reflect a shift to oxidising conditions. REE-fluorocarbonates are the main host for REEs in carbonatite and are systematically replaced by hydrated, Ca-bearing REE-phosphates (largely rhabdophane). The latter displays varied compositions but is characteristically enriched in HREE relative to monazite in the same sample. Fine-grained, compositionally heterogeneous rhabdophane is accompanied by minor amounts of other paragenetically late, hydrated phosphates with enhanced MREE/HREE relative to LREE (although still LREE-dominant). Minor, relict xenotime and zircon are significant HREE carriers. Ilmenite and pyrochlore group members contain REE but contribute only negligibly to the overall REE budget. Although the proportions of individual mineral species differ, the chemistry of key ore components are similar in different laterite samples from the current resource. Mineral signatures are, however, subtly different in the lower grade southeastern part of the deposit, including higher concentrations of HREE relative to LREE in monazite, rhabdophane, florencite and Fe-(Mn)-(hydr)oxides.
Microwave-Assisted Fabrication of High Energy Density Binary Metal Sulfides for Enhanced Performance in Battery Applications
Authors: Salvatore Kenna L. , Fang Justin , Tang Christopher R. , Takeuchi Esther S. , Marschilok Amy C. , Takeuchi Kenneth J. , Wong Stanislaus S.
Published: May 2023

Nanomaterials have found use in a number of relevant energy applications. In particular, nanoscale motifs of binary metal sulfides can function as conversion materials, similar to that of analogous metal oxides, nitrides, or phosphides, and are characterized by their high theoretical capacity and correspondingly low cost. This review focuses on structure–composition–property relationships of specific relevance to battery applications, emanating from systematic attempts to either (1) vary and alter the dimension of nanoscale architectures or (2) introduce conductive carbon-based entities, such as carbon nanotubes and graphene-derived species. In this study, we will primarily concern ourselves with probing metal sulfide nanostructures generated by a microwave-mediated synthetic approach, which we have explored extensively in recent years. This particular fabrication protocol represents a relatively facile, flexible, and effective means with which to simultaneously control both chemical composition and physical morphology within these systems to tailor them for energy storage applications.
Zinc (Zn) Doping by Hydrothermal and Alkaline Heat-Treatment Methods on Titania Nanotube Arrays for Enhanced Antibacterial Activity
Authors: Bhattacharjee Abhishek , Goodall Emma , Pereira Bruno Leandro , Soares Paulo , Popat Ketul C.
Published: May 2023

Titanium (Ti) is a popular biomaterial for orthopedic implant applications due to its superior mechanical properties such as corrosion resistance and low modulus of elasticity. However, around 10% of these implants fail annually due to bacterial infection and poor osseointegration, resulting in severe pain and suffering for the patients. To improve their performance, nanoscale surface modification approaches and doping of trace elements on the surfaces can be utilized which may help in improving cell adhesion for better osseointegration while reducing bacterial infection. In this work, at first, titania (TiO2) nanotube arrays (NT) were fabricated on commercially available pure Ti surfaces via anodization. Then zinc (Zn) doping was conducted following two distinct methods: hydrothermal and alkaline heat treatment. Scanning electron microscopic (SEM) images of the prepared surfaces revealed unique surface morphologies, while energy dispersive X-ray spectroscopy (EDS) revealed Zn distribution on the surfaces. Contact angle measurements indicated that NT surfaces were superhydrophilic. X-ray photoelectron spectroscopy (XPS) provided the relative amount of Zn on the surfaces and indicated that hydrothermally treated surfaces had more Zn compared to the alkaline heat-treated surfaces. X-ray crystallography (XRD) and nanoindentation techniques provided the crystal structure and mechanical properties of the surfaces. While testing with adipose-derived stem cells (ADSC), the surfaces showed no apparent cytotoxicity to the cells. Finally, bacteria adhesion and morphology were evaluated on the surfaces after 6 h and 24 h of incubation. From the results, it was confirmed that NT surfaces doped with Zn drastically reduced bacteria adhesion compared to the Ti control. Zn-doped NT surfaces thus offer a potential platform for orthopedic implant application.
RYK Gene Expression Associated with Drug Response Variation of Temozolomide and Clinical Outcomes in Glioma Patients
Authors: Gonzalez Ricardo D. , Small George W. , Green Adrian J. , Akhtari Farida S. , Havener Tammy M. , Quintanilha Julia C. F. , Cipriani Amber B. , Reif David M. , McLeod Howard L. , Motsinger-Reif Alison A. , Wiltshire Tim
Published: May 2023

Temozolomide (TMZ) chemotherapy is an important tool in the treatment of glioma brain tumors. However, variable patient response and chemo-resistance remain exceptionally challenging. Our previous genome-wide association study (GWAS) identified a suggestively significant association of SNP rs4470517 in the RYK (receptor-like kinase) gene with TMZ drug response. Functional validation of RYK using lymphocytes and glioma cell lines resulted in gene expression analysis indicating differences in expression status between genotypes of the cell lines and TMZ dose response. We conducted univariate and multivariate Cox regression analyses using publicly available TCGA and GEO datasets to investigate the impact of RYK gene expression status on glioma patient overall (OS) and progression-free survival (PFS). Our results indicated that in IDH mutant gliomas, RYK expression and tumor grade were significant predictors of survival. In IDH wildtype glioblastomas (GBM), MGMT status was the only significant predictor. Despite this result, we revealed a potential benefit of RYK expression in IDH wildtype GBM patients. We found that a combination of RYK expression and MGMT status could serve as an additional biomarker for improved survival. Overall, our findings suggest that RYK expression may serve as an important prognostic or predictor of TMZ response and survival for glioma patients.
Chitosan-Based Particulate Carriers: Structure, Production and Corresponding Controlled Release
Authors: Weng Jiaqi , Durand Alain , Desobry Stéphane
Published: May 2023

The state of the art in the use of chitosan (CS) for preparing particulate carriers for drug delivery applications is reviewed. After evidencing the scientific and commercial potentials of CS, the links between targeted controlled activity, the preparation process and the kinetics of release are detailed, focusing on two types of particulate carriers: matrix particles and capsules. More precisely, the relationship between the size/structure of CS-based particles as multifunctional delivery systems and drug release kinetics (models) is emphasized. The preparation method and conditions greatly influence particle structure and size, which affect release properties. Various techniques available for characterizing particle structural properties and size distribution are reviewed. CS particulate carriers with different structures can achieve various release patterns, including zero-order, multi-pulsed, and pulse-triggered. Mathematical models have an unavoidable role in understanding release mechanisms and their interrelationships. Moreover, models help identify the key structural characteristics, thus saving experimental time. Furthermore, by investigating the close relation between preparation process parameters and particulate structural characteristics as well as their effect on release properties, a novel “on-demand” strategy for the design of drug delivery devices may be developed. This reverse strategy involves designing the production process and the related particles’ structure based on the targeted release pattern.
Transdermal Delivery of α-Aminophosphonates as Semisolid Formulations—An In Vitro-Ex Vivo Study
Authors: Kocsis Dorottya , Varga Petra Regina , Keshwan Rusul , Nader Mina , Lengyel Miléna , Szabó Pál , Antal István , Kánai Károly , Keglevich György , Erdő Franciska
Published: May 2023

α-Aminophosphonates are organophosphorus compounds with an obvious similarity with α-amino acids. Owing to their biological and pharmacological characteristics, they have attracted the attention of many medicinal chemists. α-Aminophosphonates are known to exhibit antiviral, antitumor, antimicrobial, antioxidant and antibacterial activities, which can all be important in pathological dermatological conditions. However, their ADMET properties are not well studied. The aim of the current study was to provide preliminary information about the skin penetration of three preselected α-aminophosphonates when applying them as topical cream formulations in static and dynamic diffusion chambers. The results indicate that aminophosphonate 1a, without any substituent in the para position, shows the best release from the formulation and the highest absorption through the excised skin. However, based on our previous study, the in vitro pharmacological potency was higher in the case of para-substituted molecules 1b and 1c. The particle size and rheological studies revealed that the 2% cream of aminophosphonate 1a was the most homogenous formulation. In conclusion, the most promising molecule was 1a, but further experiments are proposed to uncover the possible transporter interactions in the skin, optimize the topical formulations and improve PK/PD profiles in case of transdermal delivery.
In Vitro Evaluation of Biphasic Calcium Phosphate Scaffolds Derived from Cuttlefish Bone Coated with Poly(ester urea) for Bone Tissue Regeneration
Authors: Pereira Patrícia , Neto Ana S. , Rodrigues Ana S. , Barros Inês , Miranda Catarina , Ramalho-Santos João , Pereira de Almeida Luís , Ferreira José M. F. , Coelho Jorge F. J. , Fonseca Ana C.
Published: May 2023

This study investigates the osteogenic differentiation of umbilical-cord-derived human mesenchymal stromal cells (hUC-MSCs) on biphasic calcium phosphate (BCP) scaffolds derived from cuttlefish bone doped with metal ions and coated with polymers. First, the in vitro cytocompatibility of the undoped and ion-doped (Sr2+, Mg2+ and/or Zn2+) BCP scaffolds was evaluated for 72 h using Live/Dead staining and viability assays. From these tests, the most promising composition was found to be the BCP scaffold doped with strontium (Sr2+), magnesium (Mg2+) and zinc (Zn2+) (BCP-6Sr2Mg2Zn). Then, samples from the BCP-6Sr2Mg2Zn were coated with poly(ԑ-caprolactone) (PCL) or poly(ester urea) (PEU). The results showed that hUC-MSCs can differentiate into osteoblasts, and hUC-MSCs seeded on the PEU-coated scaffolds proliferated well, adhered to the scaffold surfaces, and enhanced their differentiation capabilities without negative effects on cell proliferation under in vitro conditions. Overall, these results suggest that PEU-coated scaffolds are an alternative to PCL for use in bone regeneration, providing a suitable environment to maximally induce osteogenesis.
Exploration of Breakdown Strength Decrease and Mitigation of Ultrathin Polypropylene
Authors: Tan Daniel Q. , Liu Yichen , Lin Xiaotian , Huang Enling , Lin Xi , Wu Xudong , Lin Jintao , Luo Ronghai , Wang Tianxiang
Published: May 2023

Polypropylene film is the most important organic dielectric in capacitor technology; however, applications such as power electronic devices require more miniaturized capacitors and thinner dielectric films. The commercial biaxially oriented polypropylene film is losing the advantage of its high breakdown strength as it becomes thinner. This work carefully studies the breakdown strength of the film between 1 and 5 microns. The breakdown strength drops rapidly and hardly ensures that the capacitor reaches a volumetric energy density of 2 J/cm3. Differential scanning calorimetry, X-ray, and SEM analyses showed that this phenomenon has nothing to do with the crystallographic orientation and crystallinity of the film but is closely related to the non-uniform fibers and many voids produced by overstretching the film. Measures must be taken to avoid their premature breakdown due to high local electric fields. An improvement below 5 microns will maintain a high energy density and the important application of polypropylene films in capacitors. Without destroying the physical properties of commercial films, this work employs the ALD oxide coating scheme to augment the dielectric strength of a BOPP in the thickness range below 5 μm, especially its high temperature performance. Therefore, the problem of the reduction in dielectric strength and energy density caused by BOPP thinning can be alleviated.
Calculation of Strain Energy Density Function Using Ogden Model and Mooney–Rivlin Model Based on Biaxial Elongation Experiments of Silicone Rubber
Authors: Yamashita Yoshihiro , Uematsu Hideyuki , Tanoue Shuichi
Published: May 2023

Strain energy density functions are used in CAE analysis of hyperelastic materials such as rubber and elastomers. This function can originally be obtained only by experiments using biaxial deformation, but the difficulty of such experiments has made it almost impossible to put the function to practical use. Furthermore, it has been unclear how to introduce the strain energy density function necessary for CAE analysis from the results of biaxial deformation experiments on rubber. In this study, parameters of the Ogden and Mooney–Rivlin approximations of the strain energy density function were derived from the results of biaxial deformation experiments on silicone rubber, and their validity was verified. These results showed that it is best to determine the coefficients of the approximate equations for the strain energy density function after 10 cycles of repeated elongation of rubber in an equal biaxial deformation state, followed by equal biaxial elongation, uniaxial constrained biaxial elongation, and uniaxial elongation to obtain these three stress–strain curves.
Influence of 3D Microstructure Pattern and Infill Density on the Mechanical and Thermal Properties of PET-G Filaments
Authors: Lopes Lucas , Reis Daniel , Paula Junior Adilson , Almeida Manuela
Published: May 2023

This study aims to evaluate the thermal and mechanical performances of PET-G thermoplastics with different 3D microstructure patterns and infill densities. The production costs were also estimated to identify the most cost-effective solution. A total of 12 infill patterns were analysed, including Gyroid, Grid, Hilbert curve, Line, Rectilinear, Stars, Triangles, 3D Honeycomb, Honeycomb, Concentric, Cubic, and Octagram spiral with a fixed infill density of 25%. Different infill densities ranging from 5% to 20% were also tested to determine the best geometries. Thermal tests were conducted in a hotbox test chamber and mechanical properties were evaluated using a series of three-point bending tests. The study used printing parameters to meet the construction sector’s specific needs, including a larger nozzle diameter and printing speed. The internal microstructures led to variations of up to 70% in thermal performance and up to 300% in mechanical performance. For each geometry, the mechanical and thermal performance was highly correlated with the infill pattern, where higher infill improved thermal and mechanical performances. The economic performance showed that, in most cases, except for the Honeycomb and 3D Honeycomb, there were no significant cost differences between infill geometries. These findings can provide valuable insights for selecting the optimal 3D printing parameters in the construction industry.
Parametric Stochastic Modeling of Particle Descriptor Vectors for Studying the Influence of Ultrafine Particle Wettability and Morphology on Flotation-Based Separation Behavior
Authors: Wilhelm Thomas , Sygusch Johanna , Furat Orkun , Bachmann Kai , Rudolph Martin , Schmidt Volker
Published: May 2023

Practically all particle separation processes depend on more than one particulate property. In the case of the industrially important froth flotation separation, these properties concern wettability, composition, size and shape. Therefore, it is useful to analyze different particle descriptors when studying the influence of particle wettability and morphology on the separation behavior of particle systems. A common tool for classifying particle separation processes are Tromp functions. Recently, multivariate Tromp functions, computed by means of non-parametric kernel density estimation, have emerged which characterize the separation behavior with respect to multidimensional vectors of particle descriptors. In the present paper, an alternative parametric approach based on copulas is proposed in order to compute multivariate Tromp functions and, in this way, to characterize the separation behavior of particle systems. In particular, bivariate Tromp functions for the area-equivalent diameter and aspect ratio of glass particles with different morphologies and surface modification have been computed, based on image characterization by means of mineral liberation analysis (MLA). Comparing the obtained Tromp functions with one another reveals the combined influence of multiple factors, in this case particle wettability, morphology and size, on the separation behavior and introduces an innovative approach for evaluating multidimensional separation. In addition, we extend the parametric copula-based method for the computation of multivariate Tromp functions, in order to characterize separation processes, also in the case when image measurements are not available for all separated fractions.
Study on the Efficiency of a Hydroponic Treatment for Removing Organic Loading from Wastewater and Its Application as a Nutrient for the “Amaranthus campestris” Plant for Sustainability
Authors: Aishwarya J. M. , Vidhya R.
Published: May 2023

The investments needed for treating the wastewater produced by an ever-growing population has raised serious concerns regarding the environmental upkeep of many cities across the world. The concept of the circular economy in this context, i.e., the reuse of partially treated water to produce hydroponic plants, is the central idea of this paper. Usage of partially treated (secondary treated) wastewater for the growth of Amaranthus campestris is investigated. The many benefits here are the cost reduction in the treatment process, the reuse of water for commercial plants, the use of treated water, and no pressure on soil all address sustainable development goals such as zero hunger, no poverty, clean water, and sanitation. This study focuses on the degree of pollutant removal using Amaranthus campestris, a local green widely used in India. Secondary-treated domestic wastewater was fed to the hydroponic medium through batches by using an aerobic process, and the hydraulic retention time was maintained for 10 days. In addition to wastewater, a commercial hydroponic solution was added. This study was carried out to verify the reduction in organic loading in wastewater and the growth of plants in comparison with commercial hydroponic solutions. The total COD and BOD removal was significant (p < 0.0009), ranging from 58.5% to 72.5% and 80% to 82.5%, respectively, from the 0th day to the 50th day. After treatment, the lowest nitrogen, potassium, and phosphorus values in DWW were 2.4 mg/L, 5.4 mg/L, and 0.41 mg/L, found on the 20th, 30th, and 40th days of the experiment, respectively. It was also proven that the treated wastewater from the outlet of the hydroponic reactor was within the standard limits and safe to discharge into water bodies. Based on these results, it is encouraging to implement this method at a large scale in small local communities at a lower cost because of its simplified design in promoting a water-based circular economy, which has been proven to reduce carbon footprints, thus supporting a green environment.
Ivermectin Effect on In-Hospital Mortality and Need for Respiratory Support in COVID-19 Pneumonia: Propensity Score-Matched Retrospective Study
Authors: Llenas-García Jara , del Pozo Alfonso , Talaya Alberto , Roig-Sánchez Nuria , Poveda Ruiz Noemí , Devesa García Carlos , Borrajo Brunete Emilio , González Cuello Inmaculada , Lucas Dato Ana , Navarro Miriam , Wikman-Jorgensen Philip
Published: May 2023

Introduction. There is negligible evidence on the efficacy of ivermectin for treating COVID-19 pneumonia. This study aimed to assess the efficacy of ivermectin for pre-emptively treating Strongyloides stercoralis hyperinfection syndrome in order to reduce mortality and the need for respiratory support in patients hospitalized for COVID-19. Methods. This single-center, observational, retrospective study included patients admitted with COVID-19 pneumonia at Hospital Vega Baja from 23 February 2020 to 14 March 2021. Because strongyloidiasis is endemic to our area, medical criteria support empiric administration of a single, 200 μg/kg dose of ivermectin to prevent Strongyloides hyperinfection syndrome. The outcome was a composite of all-cause in-hospital mortality and the need for respiratory support. Results. Of 1167 patients in the cohort, 96 received ivermectin. After propensity score matching, we included 192 patients. The composite outcome of in-hospital mortality or need for respiratory support occurred in 41.7% of the control group (40/96) and 34.4% (33/96) of the ivermectin group. Ivermectin was not associated with the outcome of interest (adjusted odds ratio [aOR] 0.77, 95% confidence interval [CI] 0.35, 1.69; p = 0.52). The factors independently associated with this endpoint were oxygen saturation (aOR 0.78, 95% CI 0.68, 0.89, p < 0.001) and C-reactive protein at admission (aOR: 1.09, 95% CI 1.03, 1.16, p < 0.001). Conclusions. In hospitalized patients with COVID-19 pneumonia, ivermectin at a single dose for pre-emptively treating Strongyloides stercoralis is not effective in reducing mortality or the need for respiratory support measures.
Detection and Phylogenetic Characterization of a Novel Adenovirus Found in Lesser Mouse-Eared Bat (Myotis blythii) in South Kazakhstan
Authors: Karamendin Kobey , Kydyrmanov Aidyn , Sabyrzhan Temirlan , Nuralibekov Sardor , Kasymbekov Yermukhammet , Khan Yelizaveta
Published: May 2023

Bats are an important natural reservoir of various pathogenic microorganisms, and regular monitoring is necessary to track the situation of zoonotic infections. When examining samples from bats in South Kazakhstan, nucleotide sequences of putative novel bat adenovirus (AdV) species were found. Estimates of amino acid identities of the hexon protein have shown that potentially novel Bat mastadenovirus BatAdV-KZ01 shared higher similarity with monkey Rhesus adenovirus 59 (74.29%) than with Bat AdVs E and H (74.00%). Phylogenetically, BatAdV-KZ01 formed a separate clade, distant from Bat AdVs and other mammalian AdVs. Since adenoviruses are essential pathogens for many mammals, including humans and bats, this finding is of interest from both scientific and epidemiological points of view.
First Record of the Alien Tintinnid Ciliate Rhizodomus tagatzi Strelkow and Wirketis 1950 in the Adriatic Sea
Authors: Njire Jakica , Bojanić Natalia , Lučić Davor , Violić Ivana
Published: May 2023

The tintinnid ciliate Rhizodomus tagatzi has spread rapidly in recent decades in neritic areas of the Mediterranean and adjacent seas, where it is classified as a non-indigenous species. The present study documents the first finding of the species in the Adriatic Sea, in the transitional waters of the Neretva River estuary. Zooplankton material was collected with 5 L Niskin bottles in three layers (1, 5 and 7 m) at two stations, at the mouth of the Neretva River and 16 km upstream, in the period from May 2022 to January 2023. In addition to the morphological characteristics of R. tagatzi, we discuss the state and variability of the populations based on the abundance of the species and the influence of abiotic environmental factors (temperature and salinity) and possible pathways of entry into the Adriatic Sea. The maximum abundance of R. tagatzi in the Neretva River estuary of ~2 × 103 cells L−1 is among the highest in the Mediterranean Sea, and the species has a significant contribution to the tintinnid community (>80%), indicating successful establishment of the population in the estuary and intense influence on ecosystem functioning until the strong river flow completely displaces the wedge from the seabed. Statistical methods confirm the differences between stations in the total abundance of tintinnids and differences in their vertical distribution at the upstream station.
Feasibility and Environmental Impact of NOM Reduction by Microfiltration at a Finnish Surface Water Treatment Plant
Authors: Laurell Panu , Poutanen Heikki , Hesampour Mehrdad , Tuutijärvi Tanja , Vahala Riku
Published: May 2023

Low-pressure membranes (including microfiltration and ultrafiltration) for natural organic matter removal in drinking water treatment have gained increasing interest in the Nordic countries. Microfiltration can produce stable water quality and requires less space than conventional treatment. Hollow fibre microfiltration coupled with chemical coagulation was tested at a Finnish surface water treatment plant to study its feasibility and environmental impact compared to clarification, rapid sand filtration and ozonation. Microfiltration improved both physical and chemical water quality, while natural organic matter removal was similar to that of conventional treatment. Membrane treatment would increase operational costs by 2.5–3.5 euro cents per m3. Most of the costs derive from chemicals used in membrane cleaning. Membrane treatment is an energy-intensive process, but energy production in the Nordic countries has a low emission factor. Greenhouse gas emissions from operating microfiltration are estimated at 16 g CO2-eq./m3 of permeate. Lowering chemical consumption and using renewable energy in production could decrease total emissions.
Events in the hotel as a way to increase income
Authors: Sedova K. D. , Steinke A. Yu. ,   Graduate School of Management Russian Economic University. G. V. Plekhanov, Semkina N. S. ,   Department of Hotel and Tourism Management Russian Economic University. G. V. Plekhanova
Published: May 2023

The article is devoted to methods of increasing the profitability of the hotel. The main attention is paid to the consideration of events as a tool to increase the profitability of the hotel. The issue of logistics in the hotel during the events was considered. The authors conducted a study that identified the most popular and demanded events held in hotels today, provided information on the features of these events, and also noted the most promising direction, developing which the hotel is likely to increase its income.
THE INFLUENCE OF THE NUTRITIONAL LEVEL ON THE GROWTH AND DEVELOPMENT OF BULL CALVES
Authors: ЛУКОНИНА О.Н. , ВЕЛЬМАТОВ А.А. , ВЕЛЬМАТОВ А.П. , ТИШКИНА Т.Н.
Published: May 2023

Изучена динамика живой массы симментал-голштинских бычков III поколения при разном уровне кормления в условиях сельхозпредприятия Республики Мордовия. Для этого было сформировано 3 группы бычков по 20 голов, имеющих в генотипе 87,5% крови голштинов. Бычки контрольной группы получали питательные вещества по детализированным нормам РАСХН, а особи I и II опытных групп — на 10—20% больше этих норм. Увеличение энергетической питательности рационов позволило повысить живую массу бычков на 39,0—73,8 кг и получить их с живой массой 489—524 кг. За весь период выращивания (18 мес) более высоким среднесуточным приростом характеризовались бычки II группы, получающие на 20% больше питательных веществ. Разница между особями контрольной и II групп составила 136 г (17,9%; Р<0,05), а между бычками контрольной и I групп, получающими на 10% больше питательных веществ, — 73,6 г (9,7%; Р<0,05). Интенсивное выращивание оказало позитивное влияние на формирование типа телосложения животных. Для бычков опытных групп характерно удлиненное и широкое туловище с хорошо выраженными мясными формами.

Live weight dynamics of generation III Simmental-Holstein bull calves with various levels of nutrition was researched under the conditions of an agricultural enterprise located in the Republic of Mordovia. 3 groups of bull calves consisting of 20 individual animals with the genotype including 87.5% of Holstein blood were formed for this purpose. Bull calves from the control group received the nutrients in accordance with detailed norms of the Russian Academy of Agricultural Sciences, while species from experimental groups I and II received nutrition exceeding these norms by 10—20%. The increase of energy value of the diet allowed to increase live weight of the bulls by 39.0—73.8 kg and reach the live weight of 489—524 kg. During the whole period of rearing (18 months), bull calves from group II who received 20% more nutrients showed the greatest average daily weight gain. The difference between the animals from the control group and group II amounted to 136 g (17.9%; P<0.05), while the difference between the animals from the control group and group I (receiving 10% more nutrients) amounted to 73.6 g (9.7%; P<0.05). Intensive rearing positively influenced body type formation of the animals. Prolonged and wide body with well-defined meat forms is characteristic for the animals from the experimental groups.
THE RESULTS OF PUREBRED AND CROSSBRED BEEF CATTLE BREEDING’S IMITATION MODELING
Authors: СИДОРОВА В.Ю.
Published: May 2023

В структуре производства крупного рогатого скота на мясные цели доля продукции от разведения чистопородного и помесного скота составляет около 20%. Цель исследования — определить особенности разведения чистопородного и помесного мясного скота, установить эффективность использования резервов при его разведении на мясные цели с применением инновационных технологий кормления и содержания. Модель воспроизводства стада — 284 (продолжительность стельности — постоянная величина) и 90 (сервис–период — изменяемая величина) — показала, что наиболее близкими к эффективному воспроизводству скота для мясных целей оказались животные мясного направления продуктивности с сезонными отелами. Вопрос влияния других различных элементов технологии выращивания на эффективность разведения чистопородных и помесных животных на откорме изучен недостаточно полно и требует уточнения. Результаты исследований, отражающие различия в технологии выращивания мясного скота, показали, что для определения эффективности разведения крупного рогатого скота различных конституциональных типов был разработан методический подход с математическим и логическим выражением регрессии признаков: f1/f2+m1/m2+g1/g2+(n∑y…u), где переменные g, m, f — математические, а остальные — логические признаки: при использовании резервов выращивания до 18-месячного возраста живая масса бычков черно-пестрой породы достигает 395,4 кг, помесных бычков — 431,5 кг, а абердин ангусских — 600—650 кг.

In the cattle production for meat purposes’ structure , the share of products from both purebred and mixed cattle breeding reaches about 20%: for comparison, this figure in the USA and Canada reaches 70-75%, in Australia — 85%, in EU countries — 40—50%. The purpose of the study was the purebred and mixed beef cattle breeding features to determine, and in breeding effectiveness reserves for cattle for meat purposes with innovative technologies using for young animals’ feeding and keeping to establish. The herd reproduction model, which takes the form is: 284 (pregnancy duration — constant value) + 90 (service period — variable value) showed that the animals of the meat production with seasonal calving were the closest to the effective reproduction of livestock for meat purposes. At the same time, the issue of the influence of other various elements of the raising technology of purebred and crossbred animals breeding for fattening’s efficiency has not been studied fully enough and requires clarification. To determine the effectiveness of breeding various types of livestock, a methodological approach was developed, with a mathematical and logical expression of regression features: f1/f2 + m1/m2 +g1/g2 +(n∑y...u), where the variables g, m, f are mathematical, and the rest logical.The research results reflecting differences in the beef cattle raising technology, showed that reserves using for growing up to 18 months of age, black-and-white bulls reach a live weight of 395.4 kg, crossbred bulls — 431.5 kg, and Aberdeen-Angus bulls — 600—650 kg.
Situación actual de la formación profesional trabajo social en Vietnam hoy
Authors: Van Truong Doan
Published: May 2023

La industria del trabajo social ha venido jugando un papel importante en el desarrollo de la igualdad y el progreso de cada nación y la humanidad. En particular, el sector del trabajo social contribuye a resolver problemas sociales relacionados con la vida de individuos, pequeños grupos y comunidades de personas desfavorecidas. Hoy, junto con el rápido crecimiento económico, también van en aumento muchos problemas sociales apremiantes. Por lo tanto, abordar y prevenir estos problemas sociales es muy necesario, requiriendo una plantilla de trabajadores sociales para solucionar los problemas antes mencionados. Por lo tanto, el desarrollo y la expansión del alcance de la formación en trabajo social es un requisito urgente y en línea con la tendencia general de desarrollo de la época. Este artículo se centrará en analizar el estado actual de la formación del Trabajo Social en nuestro país en el contexto de la integración.
Social effect of COVID 19: cases from North Shoa Zone, Oromia, Ethiopia
Authors: Chekol Yayew Genet , Kasay Belay , Atlaw Habtamu , Girma Haile
Published: May 2023

The primary motivation for initiating this study is the recognition that there is a lack of geographically disaggregated information regarding the socio-economic effects of COVID-19 and thus resulted in failing to cultivate context-based prevention response and the prevailing prevention needs. Unless the key socio-economic effects of COVID 19 are known, and if there is no alignment with the spatial variation, it is impossible to plan, target, and deliver sound interventions. This study covers North Shewa Zone of Oromia region, Ethiopian. Mixed research approach with descriptive survey design has been used and systematic sampling technique was employed to select respondents proportionally from each stratum by the population size determination formal of Yemane (1967)  the sample unites were 374 respondents. The study revealed that Covid -19 has significant effect of the social networking specifically; on social assets, social gathering.
Apoyo organizacional y contextual para el fomento de vocaciones STEM. Psicometría de una escala de medición.
Authors: Magaña-Medina Deneb Elí , Aguilar-Morales Norma , Hernández-Mena Verónica
Published: May 2023

Introducción: El objetivo del estudio fue la validación psicométrica de una escala de elaboración propia para medir la percepción de apoyo organizacional y contextual sobre el fomento hacia las disciplinas STEM (ciencia, tecnología, ingeniería y matemáticas por sus siglas en inglés) para estudiantes de nivel medio superior.

Método: El cuestionario fue administrado a papel y lápiz de forma anónima y cada participante brindó su consentimiento informado al comenzar el cuestionario. Se realizó un muestreo determinístico a 390 estudiantes que cumplieron los criterios de inclusión.

Resultados: Para la validez de contenido se realizó una consulta a expertos sobre el tema, y la validez de constructo se estimó realizando un análisis factorial exploratorio (AFE), mediante el método de extracción de factores por máxima verosimilitud con rotación oblimin directo, reportando cargas factoriales superiores a 0.5. Para validar el modelo teórico se realizó de igual forma un Análisis Factorial Confirmatorio (AFC) que permitió demostrar la validez de la estructura previamente obtenida, pero con ajustes. Se estimaron los indicadores de ajuste del modelo de medida, (χ2= 15.20, gl= 8, p > 0.055, SRMR=0.05, AGFI=0.96, RMSEA 0.04 IC90[0.00-0.08], TLI=0.98, y CFI=0.99), cuyos valores obtenidos, al igual que los de fiabilidad se consideran aceptables de acuerdo con los estándares reportados en la literatura.

Discusión o Conclusión: El modelo de medida se corrobora con ajustes a la estructura teórica según lo que se reporta en los indicadores de ajuste tanto del análisis factorial exploratorio como del confirmatorio. Los resultados presentan una contribución importante en la medición de los elementos que coadyuvan al fomento de vocaciones en disciplinas STEM. Desde una mirada metodológica se propone
PERANCANGAN SISTEM PENDUKUNG KEPUTUSAN PENILAIAN KINERJA KARYAWAN (STUDI KASUS : PT. MANDIRI PASTI JAYA JAMBI)
Authors: Saputra Ade , Rasywir Errissya , Rohaini Eni
Published: May 2023

ABSTRACT

Mandiri Pasti Jaya Jambi is one of company which has been located in Jambi where provision of bonus still be selected subjective by owner desire. So always get problem like social jealousy between employment and decrease performance of employment. Because of that, this research have purpose to give solution to that happening problems with offer a decision support system of evaluating the performance of an employee to provision of bonus by using PHP programming language and DBMS MySQL. Writer make development system with waterfall method and using model approach system unified model language with use case diagram, activity diagram, class diagram and flowchart diagram. New system make some output like show employees data, admin data, assessment criteria data, employees assessment data, and result of reckoning to granting bonus employees with MAUT who contributed to company can increase performance and spirit employees

 

Keywords : System, Decision, Performance, Employees

 

ABSTRAK

Mandiri Pasti Jaya Jambi merupakan salah satu perusahaan yang berlokasi di daerah Jambi dengan pemberian bonus karyawan yang masih dipilih secara subjektif berdasarkan keinginan dari pemilik perusahaan. Sehingga terjadi permasalahan yaitu terjadi kecemburuan sosial antar karyawan dan menurunnya kinerja dari karyawan. Oleh karena itu, penelitian ini bertujuan memberikan solusi untuk permasalahan yang terjadi dengan menawarkan sistem pendukung keputusan penilaian kinerja karyawan untuk pemberian bonus menggunakan bahasa pemograman PHP dan DBMS MySQL. Penulis melakukan pengembangan sistem dengan metode waterfall dan menggunakan pendekatan model sistem unified model language menggunakan usecase diagram, activity diagram, class diagram dan flowchart diagram. Sistem baru menghasilkan output yang dapat menampilkan data karyawan, data admin, data kriteria, data sub kriteria, data penilaian karyawan dan hasil perhitungan pemberian bonus karyawan dengan metode MAUT yang memberikan kontribusi kepada perusahan dapat meningkatkan kinerja dan semangat karyawan.

 

Kata Kunci : Sistem, Keputusan, Kinerja, Karyawan
Implementasi Data Mining Untuk Menentukan Persediaan Stok Obat Di Apotek K-24 Menggunakan Metode K-Means Clustering
Authors: Ayu ramadhanty Desy , Renita Syafitri  , Errissya Rasywir  , Despita Meisak
Published: May 2023

Pengolahan data mining telah berkembang sangat pesat, beradaptasi dengan segala bentuk analisis data. Pada dasarnya, data mining dapat menganalisis data untuk menggunakan teknik perangkat lunak untuk menemukan pola dalam kumpulan data tersembunyi. Manajemen persediaan yang tinggi dan tidak ekonomis karena beberapa produk mungkin memiliki ruang dan kelebihan. Hal ini tentu sangat merugikan pelaku usaha seperti tempat kesehatan Apotek K-24. Metode K-Means sudah menjadi salah satu teknik data mining yang digunakan untuk merancang strategi persediaan atau buku pesanan yang efektif menggunakan data transaksi penjualan bisnis. Tujuan penelitian dari penelitian ini adalah untuk menerapkan algoritma KMeans, dan data transaksi obat dari Apotek K-24 di berikan sebagai contoh tipikal. Hasil analisis untuk penelitian ini menggunakan 20 buah data.
Implementasi Data Mining Untuk Menentuksn Persediaan Stok Barang Di Mini Market Menggunakan Metode K-Means Clustering
Authors: Prastiwi Hani , Jeny Pricilia  , Errissya Rasywir
Published: May 2023

[1]Abstrak- Data mining adalah metode untuk menemukan pola tertentu dari kumpulan data yang berjumlah besar. Meskipun banyak dipelajari pada bidang ilmu komputer dan statistika, data mining adalah metode yang bisa diterapkan dan mempermudah pekerjaan di bidang lainnya juga. Namun sebenarnya apa itu data mining? Data mining adalah metode dalam ilmu komputer yang biasa digunakan dalam proses pencarian knowledge. Tahapan di dalamnya berguna untuk mencari pola-pola tertentu dari data yang ada pada database. Biasanya, metode ini banyak ditemukan pada bidang machine learning dan statistika. Metode K-Means sudah menjadi salah satu teknik data mining yang digunakan untuk merancang strategi persediaan barang yang efektif menggunakan data transaksi penjualan. Tujuan dari penelitian ini adalah untuk menerap kan algoritma K-Means dan data transaksi penjualan dari MM Glory sebagai contoh tipikal. Hasil analisis untuk penelitian ini menggunakan dua puluh (20) buah data.
Perancangan Aplikasi Rekam Medis Pada Uptd Puskesmas Durian Luncuk
Authors: Yoant Prasiska  , Sharipuddin  , Hendri
Published: May 2023

UPTD Puskesmas Durian Luncuk merupakan salah satu puskemas yang beroperasi di Provinsi Jambi. Adapun permasalahan yang terjadi adalah susah dalam merekap rekam medis pasien, sulit mencari data stok obat, dan belum adanya laporan-laporan mengenai data pasien, dokter jaga dikarenakan sistem yang dilakukan masih secara manual dengan menggunakan kertas dan sering terjadi kehilangan data. Oleh karena itu, penelitian ini bertujuan memberikan solusi untuk permasalahan yang terjadi dengan menawarkan aplikasi rekam medis menggunakan bahasa pemograman PHP dan database MySQL sehingga pengolahan data lebih terstruktur dan dapat memberikan informasi data yang dibutuhkan secara cepat dan tepat. Dan dalam penelitian ini, menggunakan metode pengembangan sistem waterfall dan pemodelan sistem dengan use case diagram, activity diagram, class diagram, dan flowchart. Sehingga aplikasi dirancang dapat menghasilkan output berupa data pasien, data dokter, data obat, data rekam medis pasien dan laporan-laporan.
Perancangan Sistem Absensi Facial Recognition Menggunakan CNN dan Liveness Detector pada BPR Central Dana Mandiri
Authors: Khatina Sari  , Jasmir  , Arvita Yulia
Published: May 2023

− Pemanfaatan Facial Recognition berkembang pesat dalam berbagai bidang karena menawarkan kemudahan dalam penerapannya, untuk itu sistem ini juga dapat dimanfaatkan dalam proses pencatatan kehadiran di sebuah organisasi, terutama karena adanya perubahan kebutuhan semenjak pandemi terjadi yang menyebabkan keterbatasan interaksi antar individu dalam menjalankan aktivitasnya. Akan tetapi, dibutuhkan penambahan Liveness Detection sehingga manipulasi atau kecurangan sistem, seperti menggunakan foto untuk proses absensi, dapat dicegah. Pada penelitian ini, sistem absensi Facial Recognition dikembangkan dengan tujuan untuk meningkatkan efektivitas pencatatan kehadiran karyawan pada BPR Central Dana Mandiri. Selain itu, sistem absensi yang berteknologi touchless ini diharapkan mampu mengurangi risiko penularan virus antar karyawan di perusahaan tersebut. Sistem dirancang dengan algoritma Convolutional Neural Network untuk pendeteksian wajah dan perhitungan Eye Aspect Ratio (EAR) sebagai Liveness Detector. Berdasarkan hasil pengujian yang dilakukan, sistem dapat membedakan antara wajah yang terdaftar pada database dengan wajah asing dan hanya mencatat kehadiran karyawan setelah mengenali wajah karyawan tersebut serta mendeteksi kedipan matanya. Sedangkan dari hasil uji coba pengenalan wajah, didapatkan bahwa sistem dapat mengenali seluruh wajah yang berasal dari database sistem dengan tingkat akurasi sebesar 100%, sedangkan pengenalan wajah terhadap wajah-wajah random, yang didapatkan dari internet, memiliki tingkat akurasi sebesar 73,33%.