bluuebunny/crossref_metadata_2025 huggingface dataset:
Long-Term Heavy Metal Pollution Induces Complex Differences in Farmland Topsoil and Rhizosphere Microbial Communities
Authors: Guo Jing , Dou Weili , Liu Zhiwen , Sun Jiaxuan , Xu Duanping , Yang Qili , Lv Gang , Wang Dongli
Published: December 2023

The microbial effect of long-term heavy metal pollution on farmland remains unclear. Here, we investigated microbial (bacterial and fungal) communities in topsoil and rhizosphere samples with heavy metal (Cd, Cu, Pb, and Zn) pollution from four different types of tillage plots around an abandoned zinc smelter set up 85 years ago and analyzed the complex relationship between microorganisms, plants, and heavy metals (HMs) in soil to guide strategies for further soil remediation measures. The abundance and diversity index results showed that the bacterial and fungal diversities of the four plots were significantly different. Meanwhile, correlation analysis of the microbial communities and HMs showed that bacteria Pseudomonas and fungi Chaetothyriales and Fusarium had a good tolerance for HM pollution, but bacteria Vicinamibacteraceae, JG30_KF_CM45, RB41, Gaiella, MB-A2-108, 67-14, and Microvirga, and fungi Glomerellales, Hypocreales, Chaetomium, and Mortierella all showed indications of being sensitive to HM toxicity. Our structural equation model (SEM) attributed the inhibition of Zn and the promotion of Cd to bacterial diversity, attributed a weak inhibition of Cd to fungal diversity, and revealed the effects of the tillage type on these diversities.
Effects of Replacing Fishmeal with Algal Biomass (Pavlova sp. 459) on Membrane Lipid Composition of Atlantic Salmon (Salmo salar) Parr Muscle and Liver Tissues
Authors: Guerra Nigel , Parrish Christopher C. , Wei Minmin , Perry Judy , Del Ángel-Rodríguez Jorge A. , Tibbetts Sean M. , Emam Mohamed , Colombo Stefanie M.
Published: December 2023

A 12-week feeding trial examined the dietary impact of replacing fishmeal (FM) with algal biomass (AB) derived from Pavlova sp. strain CCMP459 (Pav459) in Atlantic salmon diets. Three distinct diets were formulated: a control diet featuring 20% FM and 7% fish oil (FO), an experimental diet incorporating a 50:50 blend of FM and AB Pav459 and reduced FO (10% FM; 4.5% FO; 10% AB), and a second experimental diet with full replacement of FM with AB Pav459 and further reduction in FO (1.75% FO; 20% AB). Replacing FM with AB Pav459 showed no significant effects on the growth performance of Atlantic salmon. Fish across all diets exhibited growth exceeding 200% from their initial weight. Analysis of total lipid content after the 12-week trial revealed no significant differences among the diets. However, individual proportions of omega-3 (ω3) and omega-6 (ω6) fatty acids varied. Fatty acid profiling in muscle and liver tissues showed distinct compositions reflective of dietary treatments. Linoleic acid (LA) and α-linolenic acid (ALA) exhibited higher proportions in total fatty acids than in membrane lipids. Docosahexaenoic acid (DHA) emerged as the predominant fatty acid in the membranes of both liver and muscle tissues. Furthermore, an analysis of sterol composition in Pavlova and salmon muscle tissue showed the presence of important sterols, including conventionally animal-associated cholesterol. This emphasizes the suitability of microorganisms, such as Pav459, for synthesizing diverse nutrients. Stable isotope analysis demonstrated direct incorporation of eicosapentaenoic acid (EPA) and DHA from diets into salmon tissues. Notably, minimal biosynthesis from the precursor ALA was observed, reaffirming the utility of Pav459-derived fatty acids. The EPA+DHA proportions in the fillet consistently met daily human consumption requirements across all dietary conditions, supporting the use of Pav459 algal biomass as an alternative to FM.
Export of Organic Cape Gooseberry (Physalis peruviana) as An Alternative Illicit Crop Substitution: Survey of Consumers in Namur, Belgium
Authors: Gómez Racines Ligia , Buitrago Vera Juan Manuel
Published: December 2023

The social situation that indigenous people encounter in rural areas of Colombia is linked to social disparities and a dearth of opportunities for their products. Illicitly harvesting coca plants affords them resources they would not receive in the conventional market. This study investigates the feasibility of exporting organic gooseberries cultivated in conflict-affected regions of Colombia to European countries. Such exports could offer a means of crop substitution for indigenous communities that currently rely on coca farming for their sustenance. Additionally, this article features an exploratory analysis of consumer attitudes towards organic cape gooseberry in Namur, Belgium. This study employed surveys of 158 individuals in 2022 to gauge consumer perception and used the ordinary least squares method in the econometric modeling of foreign trade behavior. The modeling utilized 6233 observations between 2015 and 2022 about exports to European nations. Surprisingly, dehydrated gooseberry snacks were found to be the preferred method of consumption in Namur, Belgium, as opposed to fresh fruit. The export of Colombian cape gooseberries has secured a strong presence in Europe, with its price–quantity correlation demonstrating a high inelastic demand. This implies that price changes have minimal impact on the quantities purchased overseas. Organic cape gooseberries have significant potential for indigenous land. However, this study is exploratory and limited to the variables identified in the ICECOMEX databases in Colombia. Further research should consider the consumption of organic cape gooseberries in other European cities.
Driving Circular Economy through Digital Technologies: Current Research Status and Future Directions
Authors: Chi Ziyuan , Liu Zhen , Wang Fenghong , Osmani Mohamed
Published: December 2023

The transition from a linear economy (LE) to a circular economy (CE) is not just about mitigating the negative impacts of LE, but also about considering changes in infrastructure, while leveraging the power of technology to reduce resource production and consumption and waste generation, and improve long-term resilience. The existing research suggests that digital technologies (DTs) have great potential to drive the CE. However, despite the exponential growth and increasing interest in studies on DTs and the CE from year 2016 onwards, few systematic studies on the application of DTs to enable the CE have been found. In addition, the current status and development direction of the DT-driven CE is unclear, and the potential of DTs to support CE implementation is under-researched. Therefore, the aim of this paper is to explore the potential of DTs to drive the CE. This paper set out to analyze the current status and development of the DT-driven CE and examine future development trends in the field. Using a systematic literature review approach, this paper is the first attempt to use a mixed method, i.e., to combine macro-quantitative bibliometric methods with a micro-qualitative content analysis method to explore the DT-driven CE. The results, which include the research background, co-occurrence clusters, research hotspots, and development trends of keyword co-occurrence network visualization and keyword burst detection, are presented from a macro perspective using two bibliometric analysis softwares. In addition, the use of 13 specific DTs in the CE is analyzed according to seven disciplinary areas (Environmental Sciences and Ecology, Engineering, Science and Technology and Other Topics, Business Economics, Computer Science, Operations Research and Management Science, and Construction and Building Technology) of greatest interest from a micro-qualitative point of view. Further, future trends and challenges facing DT-driven CE development are explored and feasible directions for solutions are proposed.
Room-Temperature Processable TiO2 Solar Paint for Dye-Sensitized Solar Cells
Authors: Roy Anurag , Bhandari Shubhranshu , Sen Tithi
Published: December 2023

Dye-sensitized solar cells (DSSCs) have emerged as promising alternatives to traditional silicon photovoltaics owing to their environmentally friendly nature, easy preparation, and low cost. However, a critical bottleneck in DSSC fabrication lies in the high-temperature treatment required for the metal-oxide, primarily titanium dioxide (TiO2), photoanode. This study presents an advanced approach aimed at overcoming this challenge by developing a facile and cost-effective room temperature processable TiO2 paste for large-scale device production and commercialization. In our investigation, TiO2 nanoparticles were synthesized using the sol-gel hydrothermal method. The resulting material served as the basis for a solar paint formulation, utilized as a precursor for the photoanode in tertiary butyl alcohol. Applying this paint, achieved with a simple paintbrush, eliminated the need for high-temperature curing, binders, and reduced chemical additives. This minimizes energy consumption during fabrication and enhances the interface quality and charge transport properties of the photoanode, as evidenced by photovoltaic impedance spectroscopy measurements.
An Adaptive Control Model for Thermal Environmental Factors to Supplement the Sustainability of a Small-Sized Factory
Authors: Ahn Jonghoon
Published: December 2023

Effective indoor thermal controls can have quantifiable advantages of improving energy efficiency and indoor environmental quality, which can also lead to additional benefits such as better workability, productivity, and economy in buildings. However, in the case of factory buildings whose main usage is to produce and process goods, securing thermal comfort for their workers has been regarded as a secondary problem. This study aims to explore the method for cooling and heating air supply controls to improve the thermal comfort of factory buildings by use of a data-driven adaptive model. The genetic algorithm using the idea of occupancy rate helps the model to effectively analyze the indoor environment to determine the optimized conditions for energy use and thermal comfort. As a result, the proposed model successfully shows better performance, which confirms that there is a 2.81% saving in energy consumption and a 16–32% reduction in indoor thermal dissatisfaction. In particular, the significance of this study is that energy use and thermal dissatisfaction can be reduced simultaneously despite precise air-supply controls that are performed in response to the conditions of the building, weather, and occupancy rate.
Mechanism Study of Symmetric Mechanism-Rolling Bearing Dynamic System Considering the Influence of Temperature Factor
Authors: Zhang Chengshi , Liu Tongtong , Wang Yanliang , He Hongliang , Zhang Chao
Published: December 2023

Due to the symmetry of their structure and the way they rotate, rolling bearings are often used at high temperatures and high speeds. When the temperature changes, the material properties of the rolling bearing change, which in turn causes the dynamic model equation of the rolling bearing to change. Given the problem in that the conventional dynamic model equation does not consider temperature changes, but because temperature changes cause changes in material performance parameters resulting in differences between the dynamic simulation signals and the actual signals, this paper fully considers three factors, namely, the thermal expansion coefficient, the hardness value, and the friction coefficient. With the influence of temperature changes, a study on the mechanism of the symmetric mechanism-rolling bearing dynamic system considering the influence of temperature factors is proposed. First, combined with the material properties of the rolling bearing, the changes in thermal expansion coefficient, hardness value, and friction coefficient caused by temperature changes were analyzed. Second, the functional relationship expressions obtained above were substituted into the existing conventional dynamic model. Finally, the comprehensive functional relationship formula was substituted into the conventional dynamic model to obtain the rolling bearing dynamic model under temperature difference changes. By studying the mechanism of the symmetric mechanism-rolling bearing dynamic system that considers the influence of temperature factors, this method can undertake a more comprehensive consideration of the dynamic analysis research into rolling bearing fault diagnosis, thereby verifying the effectiveness of the method.
Sustainability Assessment of Bus Low-Fare Policy Considering Three Stakeholders of the Public, Bus Enterprises and Government: A Case Study of Shenzhen, China
Authors: Yao Di , Xu Liqun , Li Jinpei , Zhang Chunqin
Published: December 2023

In order to quantitatively evaluate the sustainability of bus low-fare policy, this study establishes a sustainability evaluation index system for bus low-fare policy by using the PSR (Pressure–State–Response) model. Based on the matter–element extension model and entropy weight method, the sustainability evaluation model of bus low-fare policy is constructed. Finally, taking Shenzhen as an example, this study compares and analyzes the sustainability changes of bus fare policy in 2006, 2012 and 2016. The results show that the sustainability of the bus fare policy does not depend on the attribute of the fare (profit-making fares or public welfare fares): the sustainability of bus low-fare policy is closely related to the supporting fiscal subsidy system. Compared with the cost regulation subsidy system, the quota subsidy system is more conducive to the sustainability of bus low-fare policy. This study provides a decision-making reference for the sustainable development of urban bus low-fare policy.
The Effect of OnabotulinumtoxinA on Headache Intensity and Number of Monthly Headache Days in Individuals with Chronic Migraine with Different Levels of Neck Disability
Authors: Onan Dilara , Arıkan Halime , Martelletti Paolo
Published: December 2023

One of the treatment methods used in chronic migraine is OnabotulinumtoxinA. The effects of OnabotulinumtoxinA on headache intensity (HI) and number of monthly headache days (NMHD) in chronic migraine (CM) patients classified according to neck disability levels are unknown. Our aim was to investigate the effect of OnabotulinumtoxinA on the HI and the NMHD in individuals with CM with different levels of neck disability. One hundred sixteen patients were enrolled in the study. The OnabotulinumtoxinA protocol was administered as per Follow-the-Pain PREEMPT. The Neck Disability Index was used to evaluate neck disability. Primary outcome measures were headache intensity, assessed with the Visual Analogue Scale, and the number of monthly headache days recorded from patients’ diaries. Secondary outcome measures were migraine disability, assessed with the Migraine Disability Assessment Test, and quality-of-life, assessed with the Headache Impact Test-6. All assessments were made at baseline and end of the treatment. The OnabotulinumtoxinA treatment showed a greater improvement effect in the number of monthly headache days (p = 0.000) and migraine disability (p = 0.000) parameters in the severe and complete disability groups. CM patients with complete and severe neck disability received the most benefit in reducing the NMHD at 3 months after OnabotulinumtoxinA treatment, but the HI decreased at a similar level in all neck disability groups.
Rationality Research on Pumping Station Location Based on MIKE Model: A Case Study of the Wanfu River Re-Navigation Project
Authors: Han Song , Yu Xinyan , Zhang Wei , Sang Guoqing , Liu Yuyu , Xu Shiguo
Published: December 2023

The site selection of hydraulic structures is crucial to the successful implementation of water conservancy projects. Reasonable or not, site selection has a direct impact on the functioning of hydraulic structures, engineering safety, and environmental impact. In this paper, the proposed Wanfu River Guanqiao Ship Lock and Pumping Station engineering is utilised as the object. The MIKE model is executed to simulate both the impact of Guanqiao Ship Lock operation on the water quality of the pumping station intake as well as the effects of pumping station operation on the navigable water level in order to analyse and demonstrate the reasonableness of the pumping station’s location. According to the water quality monitoring data of the last three years, the entropy weight method coupled with the comprehensive pollution index method was used to evaluate the water quality of the Wanfu River. A one-dimensional hydrodynamic water quality model was constructed by applying MIKE11, which reveals the change rule of water quality and also demonstrates the safety of navigable water levels. The MIKE21 two-dimensional water quality model, which intuitively displays the spatial and temporal patterns of change of each indicator, was constructed. The results show the following: (1) The evaluation results of the entropy weight method coupled with the comprehensive pollution index method indicate that the water quality of the Wanfu River is Class III, which meets the water intake standard. (2) Concentrations of the indicators are higher in the abundant water period than in the dry water period, in which the water quality is Class IV in June and July. (3) There is no impact of the pump station operating on navigable water levels.
РОЗВИТОК ФІЗИЧНИХ ЯКОСТЕЙ МОЛОДШИХ ШКОЛЯРІВ ЗАСОБАМИ РУХЛИВИХ ІГОР
Authors: Лебзіна Крістіна
Published: December 2023

У статті проаналізовано використання рухливих ігор для розвитку фізичних якостей дітей молодшого шкільного віку. Розглянуто важливість активного впровадження рухливих ігор в освітню практику початкової школи та застосування широкого спектру рухливих ігор на уроках фізичної культури. У статті аналізуються питання, пов’язані з реалізацією освітнього процесу фізичного розвитку молодших школярів засобами рухливих ігор. Визначено необхідність проведення занять з фізичного виховання в режимі реального часу як чинника оптимізації рухової активності учнів для зміцнення здоров'я, формування здорового способу життя та корекції фізичного стану школярів.

Визначено, що в сучасних умовах організація занять з фізичного виховання учнів початкових класів повинна мати профілактичну та рухову спрямованість, сконцентровану на покращення адаптації до рухових навантажень. Завданням фізичного виховання для молодших школярів у сучасних умовах є насамперед повноцінна реалізація освітнього процесу та створення умов для фізичного розвитку на основі комплексного підходу до фізичної підготовленості і спроможності учнів молодшого шкільного віку.
STUDY OF THE PROCESS OF THRESHING LEGUMINOUS GRASS SEEDS WITH A DRUM-TYPE THRESHING DEVICE
Authors: ANELIAK Mykhailo , KUZMYCH Alvian , STEPANENKO Serhii , LYSANIUK Viktor
Published: December 2023

The article presents the results of studies of the process of threshing leguminous grass seeds with a drum-type threshing device. The process of material movement in the working gap of the drum deck was modelled and the intensity of the action of the working on the material under optimal operating conditions was substantiated. The dependence of the completeness of threshing alfalfa seeds on the number of rasp bar actions on the material on pendulum copra and in a threshing device was obtained based on the results of laboratory research. The influence of the design and technological parameters of the threshing device on the efficiency of threshing alfalfa seeds, as well as on the energy indicators of their operation, has been determined. The rational parameters of the threshing device are substantiated, which ensure complete threshing of seeds at the level of 96.5-98.2%, and damage to no more than 0.8% of seeds.
Un olio può essere agrumato?
Authors: Altissimi Elisa
Published: December 2023

Alcuni nostri lettori ci chiedono se l’aggettivo agrumato sia una forma corretta in italiano, quale sia il suo significato e se sia possibile riferirlo a un olio, come fa una nota azienda del settore, o ad altri cibi.
Mandi Balimau Sebagai Tradisi Masyarakat di Minangkabau
Authors: Anggraini Lopa Sulis , Darwianis Darwianis , Beyete Etereda , Maulana Ibrahim Deden
Published: December 2023

Balimau adalah tradisi turun temurun yang diwariskan nenek moyang Minangkabau dan biasanya dilakukan masyarakat di air sungai yang mengalir dan sekarang banyak dilakukan di tempat-tempat pemandian umum. Tradisi mandi Balimau yang dipercaya sejak dulu sampai sekarang masih banyak melakukan mandi Balimau menggunakan jeruk di sungai dan tempat pemandian untuk tujuan membersihkan diri menjelang bulan suci Ramadhan. Dulu, masyarakat  Minangkabau, Sumatera Barat ada tradisi Balimau, mandi di sungai menggunakan Jeruk membersihan diri menjelang Ramadhan. Karena ketika itu belum ada sabun untuk mandi.  Di Riau dan Lampung  juga ada tradisi mandi Taubat menjelang memasuki bulan suci Ramadhan. Tradisi Balimau semata-mata untuk membersihkan diri, sebelum memasuki bulan Puasa. Namun kini, akibat perkembangan zaman, momen  Balimau dijadikan untuk pergi main-main ke tempat wisata serta mandi mandi bertentangan dengan adat dan agama Islam. Dulu membaca atau berniat mandi Balimau dan meluruskan hati, semata-mata untuk membersihkan diri dan mensucikan jiwa memasuki  bulan Puasa.
GESTÃO DE SUPRIMENTOS E COMPRAS EM ESCOLAS PÚBLICAS MUNICIPAIS: OTIMIZAÇÃO ATRAVÉS DO PLANEJAMENTO LOGÍSTICO
Authors: Rodrigues Mirislaine , Lima Wagner Soares de
Published: December 2023

A gestão eficiente de suprimentos e compras desempenha um papel fundamental no desenvolvimento educacional das escolas públicas municipais. Por meio de uma gestão adequada, é possível garantir o abastecimento regular de materiais e recursos essenciais para o funcionamento das escolas, promovendo um ambiente propício ao aprendizado. Além disso, a gestão de suprimentos e compras contribui para o desenvolvimento econômico local, uma vez que a contratação de fornecedores locais estimula a economia da região. Isso pode resultar em benefícios para a comunidade, como a geração de empregos e o fortalecimento do comércio local. Este estudo visa investigar e propor uma gestão otimizada das cadeias de suprimentos de gestão de suprimentos e compras em escolas públicas municipais para otimizar a alocação de recursos, maximizando a eficiência das aquisições e garantindo o fornecimento adequado de materiais, contribuindo para a qualidade do ensino. Este estudo aborda a gestão de compras e suprimentos em escolas públicas municipais. A análise revelou desafios como a necessidade de seguir regras de licitação, a variação nas demandas das escolas e a busca por preços vantajosos sem comprometer a qualidade na gestão otimizada das cadeias de suprimentos adotadas por algumas escolas incluem parcerias com fornecedores confiáveis, participação em consórcios de compras e uso de recursos tecnológicos para agilizar os processos. A gestão eficaz de compras e suprimentos é fundamental para garantir a qualidade do ambiente educacional nas escolas públicas.
La Flagellazione di Piero della Francesca
Authors: Gianni Alessandra
Published: December 2023

For over three centuries Piero della Francesca’s Flagellation has sparked great interest among scholars and academics all around the world who have built complex demonstration plans in order to reveal its true meaning, in attempt to identify historical events that could form a correct chronology. The intent of these pages is to insert the painting in the centuries-old iconographic tradition, an essential reference to Piero and his commissioners, that can clarify its meaning. Hints to the Montefeltro dukes’ conspiracies and joyful or unpleasant events, or Costantinopoli’s fall, alongside the call to the crusade against the Turks, have been set aside. It will now be possible to go back to enjoy the painting in its absolute formal perfection.
Determinants of Manufacturing Sector Growth in Malaysia
Authors: Yee Woon Shin , Bakar Nor Aznin Abu
Published: December 2023

The purpose of this study is to analyze the determinants of manufacturing sector’s growth in Malaysia. It aims to evaluate the effects of the selected independent variables on the value-added of manufacturing in Malaysia. A time series data for the period of 1970 to 2019 is used and the multi regression analysis is employed. Results obtained indicate that the exports of goods and services, net inflows of foreign direct investment are statistically significant in determining the manufacturing growth. Therefore, the government should provide more incentives for export activities, such as the reduction in tariffs, tax, and increase in subsidiaries. This initiative will attract more sellers to export their goods with the incentives given by the government. At the same time, the government should take some initiatives such as reducing costs and increasing profits for those investors who are interested in investing in Malaysian businesses. This could help to attract more investors to invest and this would help the manufacturing sector increase production capacity, resulting in an increase in manufacturing value added.
GAMBARAN PEMENUHAN KEBUTUHAN DASAR FISIOLOGIS PADA MAHASISWA PENGGUNA VAPE
Authors: Widia Chita
Published: December 2023

Kebutuhan fisiologis adalah kebutuhan untuk mempertahankan kehidupan atau kelangsungan hidup yang harus dipenuhi terlebih dahulu sebelum kebutuhan yang lain. Kebutuhan fisiologis meliputi oksigen, cairan dan elektrolit, nutrisi, eliminasi, istirahat tidur, pengaturan suhu tubuh dan seksual.Vape adalah suatu jenis penghantar nikotin elektrik. Penelitian ini bertujuan untuk mengetahui Pemenuhan Kebutuhan Dasar Fisiologis Pada Mahasiswa Pengguna Vape. Jenis penelitian yang dilakukan adalah deskriptif, pengambilan sampel menggunakan teknik total sampling. Jumlah responden sebanyak 20 orang. Hasil penelitian menunjukan kebutuhan tidur 75% tidak terpenuhi, kebutuhan  oksigenisasi 35% tidak terpenuhi, kebutuhan nutrisi  40% tidak terpenuhi, kebutuhan eliminasi 5% tidak terpenuhi. Penelitian ini diharapkan dapat memberikan informasi  untuk memilih gaya hidup yang sehat dan tidak merokok dalam bentuk apapun. Penelitian selanjutnya diharapkan dapat mengembangkan penelitian terhadap masyarakat luas dengan berbagai usia yang menggunakan vape.
Skin Cancer Classification using Multiple Convolutional Neural Networks
Authors: Praveen Raj A  , Kanishk V  , Vineesh K  , A Senthilselvi
Published: December 2023

Skin cancer is a significant threat to the global health, with over 2.1 million new cases diagnosed annually worldwide. Timely detection and treatment are vital for improving survival rates, yet the limited availability of dermatologists in remote regions poses a significant barrier. The utilization of Artificial Intelligence (AI) and Deep Learning (DL) has seen a remarkable surge in recent years for skin cancer prediction. This study conducts an in-depth review of advanced skin cancer prediction methods employing deep learning techniques and explores the diverse array of machine learning algorithms applied in this context. Skin cancer comprises seven distinct diagnoses, presenting a formidable challenge for dermatologists due to the overlapping phenotypic traits. Conventional diagnostic accuracy typically ranges from 62% to 80%, underscoring the potential of machine learning to enhance diagnosis and treatment. While some researchers have created binary skin cancer classification models, extending this to multiple classes with superior performance has been elusive. A deep learning classification model for various skin cancer types, yielding promising results that highlight the superiority of deep learning in classification tasks is developed. The experimental outcomes demonstrate that the individual accuracy of Sequential, ResNet50, DenseNet201, VGG-16 and EfficientNetB0 models are aggregated and yields the maximum occurring output value from all the models. Furthermore, a comparative analysis with the latest skin classification models underscores the superior performance of the proposed multi-type skin cancer classification model.
Analysis of Effectiveness of Cut Size Line Machines Based on Total Productive Maintenance (TPM) and Analytical Hierarchy Process (AHP) - A Case Study
Authors:   Master Student in Mechanical Engineering, Universitas Andalas, Indonesia, Ardi Muhammad , Sutanto Agus ,   Mechanical Engineering Department, Universitas Andalas, Indonesia, Susilawati Anita ,   Mechanical Engineering Department, Universitas Riau, Indonesia
Published: December 2023

This research aims to analyze the implementation of Total Productive Maintenance (TPM) using Overall Equipment Effectiveness (OEE) and Analytical Hierarchy Process (AHP) approaches to increase the OEE value on cut-size line machines in the finishing department in PT. X. The research methodology was carried out by calculating OEE and significant loss values, analyzing Pareto and Fishbone diagrams, and using the AHP as a decision-making method. Then, the recommendations for implementing focused and autonomous maintenance in the case study company. The research results revealed that the significant influencing factor for the OEE value was engine speed, which causes performance efficiency to decrease so that the OEE value also decreases. The OEE value in 2021 is 74%. The improvement plan by applying the TPM and AHP methods will be expected to increase the performance efficiency of the machine via OEE value from 74% in 2021 to 79% for the coming year 2023/2024.
Apengeters ›Erbe‹
Authors: Vennebusch Jochen Hermann
Published: December 2023

Besides four bells, two baptismal fonts have survived from Gerhard Kranemann’s workshop in Lübeck, which can be considered as outstanding works of the Lübian bronze casting of the late Middle Ages.
While the bells are kept very simple, have no ornamentation and only two of them even bear an inscription, the two baptismal fonts are very elaborately conceived and decorated with numerous reliefs and figures,
some of which reflect a reference to the place of use of the object. The two baptismal fonts also clearly show the different demands of the pictorial programs, which were apparently also connected with the available
financial budget. After all, the bronze casting in Schönberg, which can certainly be dated to 1357, was in all likelihood the donation of two clerics serving at the church in Schönberg and, above all, of the bishop of
Ratzeburg who was in office at the time, while the baptismal font in Siek, which was probably created somewhat later, was the donation of the Lübeck citizen Hinrich Flint. Both artefacts also reveal important details
about the production technique of medieval bronze castings on the one hand, and about the reception of important regional models on the other hand, whose conception was further developed and partly serialized.
The extremely carefully crafted and therefore qualitatively high-ranking works of the caster Gerhard Kranemann, so far rather neglected by art historical scholarship, can thus be regarded as links and mediators
between the baptismal fonts of Hans Apengeter, who can be traced in Lübeck in the first half of the 14th century, and the workshops producing them from the middle of the 15th century onwards.
The Breakthrough Listen Search for Intelligent Life: Technosignature Search of 97 Nearby Galaxies
Authors: Choza Carmen , Bautista Daniel , Croft Steve , Siemion Andrew P. V. , Brzycki Bryan , Bhattaram Krishnakumar , Czech Daniel , de Pater Imke , Gajjar Vishal , Isaacson Howard , Lacker Kevin , Lacki Brian , Lebofsky Matthew , MacMahon David H. E. , Price Danny , Schoultz Sarah , Sheikh Sofia , Varghese Savin Shynu , Morgan Lawrence , Drew Jamie , Worden S. Pete
Published: December 2023

The Breakthrough Listen search for intelligent life is, to date, the most extensive technosignature search of nearby celestial objects. We present a radio technosignature search of the centers of 97 nearby galaxies, observed by Breakthrough Listen at the Robert C. Byrd Green Bank Telescope. We performed a narrowband Doppler drift search using the turboSETI pipeline with a minimum signal-to-noise parameter threshold of 10, across a drift rate range of ±4 Hz s−1, with a spectral resolution of 3 Hz and a time resolution of ∼18.25 s. We removed radio frequency interference (RFI) by using an on-source/off-source cadence pattern of six observations and discarding signals with Doppler drift rates of 0. We assess factors affecting the sensitivity of the Breakthrough Listen data reduction and search pipeline using signal injection and recovery techniques and apply new methods for the investigation of the RFI environment. We present results in four frequency bands covering 1–11 GHz, and place constraints on the presence of transmitters with equivalent isotropic radiated power on the order of 1026 W, corresponding to the theoretical power consumption of Kardashev Type II civilizations.
X-PSI Parameter Recovery for Temperature Map Configurations Inspired by PSR J0030+0451
Authors: Vinciguerra Serena , Salmi Tuomo , Watts Anna L. , Choudhury Devarshi , Kini Yves , Riley Thomas E.
Published: December 2023

In the last few years, the NICER collaboration has provided mass and radius inferences, via pulse profile modeling, for two pulsars: PSR J0030+0451 and PSR J0740+6620. Given the importance of these results for constraining the equation of state of dense nuclear matter, it is crucial to validate them and test their robustness. We therefore explore the reliability of these results and their sensitivity to analysis settings and random processes, including noise, focusing on the specific case of PSR J0030+0451. We use X-ray Pulse Simulation and Inference (X-PSI), one of the two main analysis pipelines currently employed by the NICER collaboration for mass and radius inferences. With synthetic data that mimic the PSR J0030+0451 NICER data set, we evaluate the recovery performances of X-PSI under conditions not previously tested, including complex modeling of the thermally emitting neutron star surface. For the test cases explored, our results suggest that X-PSI is capable of recovering the true mass and radius within reasonable credible intervals. This work also reveals the main vulnerabilities of the analysis: a significant dependence on noise and the presence of multimodal structure in the posterior surface. Noise particularly impacts our sensitivity to the analysis settings and widths of the posterior distributions. The multimodal structure in the posterior suggests that biases could be present if the analysis is unable to exhaustively explore the parameter space. Convergence testing, to ensure an adequate coverage of the parameter space and a suitable representation of the posterior distribution, is one possible solution to these challenges.
Constraining a Companion of the Galactic Center Black Hole Sgr A*
Authors: Will Clifford M. , Naoz Smadar , Hees Aurélien , Tucker Alexandria , Zhang Eric , Do Tuan , Ghez Andrea
Published: December 2023

We use 23 yr of astrometric and radial velocity data on the orbit of the star S0-2 to constrain a hypothetical intermediate-mass black hole orbiting the massive black hole Sgr A* at the Galactic center. The data place upper limits on variations of the orientation of the stellar orbit at levels between 0.°02 and 0.°07 per year. We use a combination of analytic estimates and full numerical integrations of the orbit of S0-2 in the presence of a black hole binary. For a companion intermediate-mass black hole outside the orbit of S0-2 (1020 au), we find that a companion black hole with mass m

c
between 103 and 105
M
⊙ is excluded, with a boundary behaving as

a

c

∼

m

c

1

/

3

. For a companion with a

c
< 1020 au, a black hole with mass between 103 and 105
M
⊙ is excluded, with

a

c

∼

m

c

−
1

/

2

. These bounds arise from quadrupolar perturbations of the orbit of S0-2. Significantly stronger bounds on an inner companion arise from the fact that the location of S0-2 is measured relative to the bright emission of Sgr A* and that separation is perturbed by the “wobble” of Sgr A* about the center of mass between it and the companion. The result is a set of bounds as small as 400 M
⊙ at 200 au; the numerical simulations suggest a bound from these effects varying as

a

c

∼

m

c

−
1

. We compare and contrast our results with those from a recent analysis by the GRAVITY collaboration.
Wide-bandwidth Observations of PSR J0941–39 and PSR J1107–5907
Authors: Sun S. N. , Wang N. , Yan W. M. , Wang S. Q. , Xie J. T.
Published: December 2023

We present a polarization analysis of PSR J0941–39 and PSR J1107–5907, which exhibit transitions between being pulsars and rotating radio transients (RRATs), using the ultrawide-bandwidth low-frequency receiver on Murriyang, the Parkes 64 m radio telescope. The spectral index of each pulsar was measured, revealing distinct variations among different states. By using the rotating vector model, we determined that the geometry of the magnetosphere remains consistent between the RRAT state and the pulsar state for PSR J0941–39, with emissions originating from the same height in the magnetosphere. The occurrence of the RRAT state could be attributed to variations in currents within the pulsar’s magnetosphere. Our results suggest that the emission mechanism of an RRAT may share similarities with that of a typical pulsar.
Time-delayed feedback control for chaotic systems with coexisting attractors
Authors: Zhu Erxi
Published: December 2023

This study investigated the Hopf bifurcation of the equilibrium point of chaotic systems with coexisting attractors under the time-delayed feedback control. First, the equilibrium point and Hopf bifurcation of chaotic systems with coexisting attractors were analyzed. Second, the chaotic systems were controlled by time-delayed feedback, the transversality condition of Hopf bifurcation at the equilibrium point was discussed, and the time-delayed value of Hopf bifurcation at the equilibrium point was obtained. Lastly, the correctness of the theoretical analysis was verified by using the numerical results.
The Anatomy of Sorting—Evidence From Danish Data
Authors: Lentz Rasmus , Piyapromdee Suphanit , Robin Jean-Marc
Published: December 2023

In this paper, we formulate and estimate a flexible model of job mobility and wages with two‐sided heterogeneity. The analysis extends the finite mixture approach of Bonhomme, Lamadon, and Manresa (2019) and Abowd, McKinney, and Schmutte (2019) to develop a new Classification Expectation‐Maximization algorithm that ensures both worker and firm latent‐type identification using wage and mobility variations in the data. Workers receive job offers in worker‐type segmented labor markets. Offers are accepted according to a logit form that compares the value of the current job with that of the new job. In combination with flexibly estimated layoff and job finding rates, the analysis quantifies the four different sources of sorting: job preferences, segmentation, layoffs, and job finding. Job preferences are identified through job‐to‐job moves in a revealed preference argument. They are in the model structurally independent of the identified job wages, possibly as a reflection of the presence of amenities. We find evidence of a strong pecuniary motive in job preferences. While the correlation between preferences and current job wages is positive, the net present value of the future earnings stream given the current job correlates much more strongly with preferences for it. This is more so for short‐ than long‐tenure workers. In the analysis, we distinguish between type sorting and wage sorting. Type sorting is quantified by means of the mutual information index. Wage sorting is captured through correlation between identified wage types. While layoffs are less important than the other channels, we find all channels to contribute substantially to sorting. As workers age, job arrival processes are the key determinant of wage sorting, whereas the role of job preferences dictate type sorting. Over the life cycle, job preferences intensify, type sorting increases, and pecuniary considerations wane.
The Cross‐Sectional Implications of the Social Discount Rate
Authors: Eden Maya
Published: December 2023

In this paper, I consider two normative questions: (1) how should policymakers approach tradeoffs that involve different age groups, and (2) at what rate should policymakers discount the consumption of future generations? I demonstrate that, under standard assumptions, these two questions are equivalent: caring more about the future means caring less about the elderly. Even small differences between the social discount rate and the market interest rate can have significant quantitative implications for the relative value placed on the consumption of different age groups.
QUANTITATIVE APPROACHES IN ARCHITECTURAL DESIGN FOR USER-ORIENTED INDOOR ENVIRONMENTAL QUALITY
Authors: Lee Jeehwan
Published: December 2023

Understanding indoor environmental quality (IEQ) and integrating indoor data into architectural design is a critical component of green building design for building occupants’ comfort and health. With a growing emphasis on creating healthy and comfortable indoor environments in green buildings, indoor data in architectural design has increasingly incorporated quantitative methods to analyze and optimize indoor environmental quality parameters.

Data-driven design in architecture has been used as a decision-making approach to the green building design process; it has implications for the building occupants to voluntarily enhance their indoor environments and comfort. A higher degree of personal control for indoor environmental quality (IEQ) leads to higher satisfaction, energy savings, and productivity in work environments. IEQ data access related to thermal, visual, and acoustic comforts and indoor air enables occupants to acquire ownership of indoor controls, contributing to their comfort and task productivity.

Undergraduate architecture students carried out a series of data-driven designs for IEQ monitoring and design integrations by conducting a field study, data collection, data analysis, and visualization, and linking findings to architectural proposals. Participating groups were requested to i) theoretically understand IEQ data parameters for four primary indoor environments, ii) experimentally conduct a field survey of target spaces, iii) numerically predict IEQ conditions by using diverse simulation tools and measurement devices, iv) graphically visualize IEQ findings, and v) finally integrate findings into the architectural design as a solutional proposal. The findings highlight that the potential of quantitative approaches in architectural design enhances students’ understanding of environmental contributors and design solutions for occupants’ comfort and health.
A Comparative Literature Review of Integrated Approach in Health Care in High and Low- Middle-Income Countries
Authors: Kumar Vikash , Cheng Suk Yin Caroline
Published: December 2023

This literature review explores the definitions, models, and outcomes of an integrated approach to delivering health services. The concept of integrated healthcare emerged in the 1970s and was influenced by the primary healthcare model proposed by the World Health Organization in the Alma-Ata Declaration on Primary Health Care in 1978. This literature review aims to examine how integration is understood and implemented in high-income and low-middle-income countries. A systematic search of major electronic databases, such as PubMed, ScienceDirect, SCOPUS, and Medline, was conducted to identify relevant peer-reviewed journal articles. The search used specific word categories related to the study, such as health system integration, health system, program, outcome/output, and perception. The findings of the study indicate that previous studies focused on policies on health system integration, generated evidence, and refined theories related to integrated care, including person-centered approaches, care coordination, and continuum of care. However, these studies mainly concentrated on desired outcomes and the effectiveness of the integrated approach, often overlooking the experiences of health workers who play a vital role within the health system. As a result, the importance of their experiences, opinions, and contributions to the success of integrated care has not been sufficiently incorporated into existing research. The study concludes that health workers’ experiences and perspectives need to be considered when examining the integrated approach in the development of social and health studies.
Exploring the Interplay between Policy Texts and Local Realities in Drug Procurement for the NPCDCS Program in Bihar: An Institutional Ethnography
Authors: Kumar Vikash
Published: December 2023

India has the largest number of families living below the poverty threshold, resulting in high out-of-pocket expenditure for healthcare, including essential medicines for noncommunicable diseases (NCDs). With the increasing prevalence of NCDs, the role of the Indian government becomes crucial in ensuring that patients have access to essential drugs through public health facilities. This research paper explores the institutional processes of drug procurement in the National Program for Prevention and Control of Diabetes, Cardiovascular Disease, and Stroke in Bihar, India, using institutional ethnography as its methodological approach. The data for the study was collected over a 10-months period in three districts of Bihar and involved collecting data through participant observation, interviews, and reviews of official documents and program guidelines. The findings highlight the influence of various institutional and regulatory texts that shape the implementation of integrated programs in district hospitals and carry the authority and instructions of the Ministry of Health and Family Welfare. Despite their legal entity and autonomous status, the study reveals that the governance, decision-making, and autonomy of health societies involved in the program were restricted through textual practices. The study’s contribution to social science and health system literature lies in illustrating the multiple factors that influence drug procurement at the central, state, and local levels.
Corrective Abortion and Crime
Authors: Epstein William M
Published: December 2023

Observation is key and it is generally supported in the literature that many social problems are caused less by the unborn and more by people below 18 years of age. It is certainly undeniable that the widespread recourse to abortion, usually by pregnant women, has saved taxpayers in the United States many billions of dollars. Had some of the nation’s youths also been aborted before birth, many billions more would have been saved. While certain lasting inconveniences and blemishes borne by parents are irremediable, it is yet possible to prevent stress from continuing on to grandparents and the future society. This paper explores the possibility of correcting many of these oversights through corrective abortions and psychotherapeutic interventions. It also draws out some implications for social policy.
La Malinche: de la subrepresentación a la reivindicación. Malinche ayer, Marina hoy
Authors:  Pleguezuelos María Rocío  Ruiz
Published: December 2023

Muchos personajes históricos han sido rechazados, desvirtuados o simplemente subrepresentados en la gran pantalla y por ende, en la pequeña pantalla. Ha sido este el caso de muchos de los personajes que formaron parte de la historia de la conquista de América por parte de los españoles, siendo Marina, conocida como La Malinche, uno de los más ignorados y maltratados por el cine. Su figura histórica ha sufrido el rechazo y la crítica durante siglos y también se ha transmitido esa negatividad a los medios audiovisuales; contaminando su figura que ha aparecido en pocas ocasiones y, casi siempre, de forma fugaz y con poco peso para la historia desarrollada en la película. Los trabajos de los últimos tiempos parecen querer reivindicar a esta mujer que, además de esclava, amante y madre, fue una inteligente traductora y un elemento crucial para la toma del Imperio Mexica por parte de los españoles.