bluuebunny/crossref_metadata_2025 huggingface dataset:
INFLUENCE OF MICRO-HOLES ON RAKE FACE OF THE CARBIDE INSERT ON MACHINING PERFORMANCE
Authors:   Vellore Institute of Technology, School of Mechanical Engineering, Vellore, India, Jeyapandiarajan P. , Xavior M. Anthony ,   Vellore Institute of Technology, School of Mechanical Engineering, Vellore, India, Sasidharan P. ,   University of Tours, University of Orleans, France, Duchosal Arnaud ,   University of Tours, University of Orleans, France
Published: October 2021

The performance of the PVD coated carbide insert with micro-holes is experimentally compared with that of the conventional inserts while machining Inconel 718 under Dry and MQL condition (Canola Oil, 0.25% Gr with Canola Oil). The machining performance of textured tool is found to be relatively good when compared to untextured tool in terms of the cutting force, surface roughness, flank wear and crater wear occurred on the cutting inserts. It is being inferred that Canola oil with 0.25% Gr-nanoparticle has improved the cutting force by 17.39%, decreased the flank wear and surface roughness by 20% and 36.23% respectively while machining with the textured tool.
EXPERIMENTAL STUDY ON TILTING STIFFNESS OF OIL HYDROSTATIC SHALLOW RECESS THRUST BEARINGS
Authors:   KERN Microtechnik GmbH, Tripkewitz F. A. , Fritz M. ,   KERN Microtechnik GmbH, Weigold M. ,   Technische Universität Darmstadt, Institute of Production Management, Technology and Machine Tools (PTW),
Published: October 2021

Circular shallow recess bearings generate a not rotationally symmetrical pressure profile if they are not aligned parallel. The throttling effect of the shallow recess makes this response possible. Furthermore, the generated pressure profile acts against the tilting. As a result, a shallow recess bearing generates a tilting stiffness. This article outlines an experimental approach to characterize the tilting stiffness of an oil hydrostatic shallow recess thrust bearing with micro step and gap height. For this purpose, we developed a small test bench. The measured tilting stiffnesses are compared with a numerical solution based on the 2D-Reynolds equation.
INFLUENCE OF LPBF PROCESS PARAMETERS ON MILLING OF A MARAGING TOOL STEEL
Authors:   Karlsruhe Institute of Technology (KIT), wbk Institute of Production Science, Neuenfeldt M. , Zanger F. ,   Karlsruhe Institute of Technology (KIT), wbk Institute of Production Science, Schulze V. ,   Karlsruhe Institute of Technology (KIT), wbk Institute of Production Science
Published: October 2021

As the process parameters in the LPBF-process influence the microstructure, density and hardness of the produced parts, their influence on the milling process is suspected. For this reason the new maraging tool steel alloy Specialis® has been investigated on its machinability depending on the built parameters. The influence of the energy density, laser power and scan speed in the LPBF-process on the milling process Specialis® is examined. During the milling process the process forces are measured as well as the obtained surface roughness. The results confirm the importance of adjusting the process parameters in the LPBF-process to the finishing process.
MACHINE DATA-BASED PREDICTION OF BLISK BLADE GEOMETRY CHARACTERISTICS
Authors:   Rolls-Royce Deutschland Ltd & Co KG, Ernst A. , Weigold M. ,   TU Darmstadt, Institute of Production Management, Technology and Machine Tools
Published: October 2021

The increasing availability of data recording solutions in the field of machining in combination with major developments in Machine Learning and Artificial Intelligence enable new approaches towards optimization in the industrial environment. In the aviation industry, critical components must fulfil extremely high quality standards. This requires a stable and error-free manufacturing process, as well as an extensive geometrical compliance, what is until now verified by long-lasting coordinate measuring machine (CMM) inspection. This publication shows how machine data analysis can contribute to reduce CMM measurement effort and thus decrease component cycle time. For this purpose, production machine data from an aircraft engine Inconel compressor blisk blade 5-axis milling operation was recorded and analysed by subsequent application of machine learning algorithms to predict the geometric measurement characteristics.
COMPARISON OF SPRAYABILITY AND SOLUBILITY OF BIO-BASED LUBRICANTS WITH LIQUID CARBON DIOXIDE
Authors:   University Erlangen-Nuremberg, Institute for Resource and Energy Efficient Production Systems, Meier T. , Gross D. ,   University Erlangen-Nuremberg, Institute for Resource and Energy Efficient Production Systems, Hanenkamp N. ,   University Erlangen-Nuremberg, Institute for Resource and Energy Efficient Production Systems
Published: October 2021

In recent years, cryogenic minimum quantity lubrication (CMQL) has been established in comparison to pure cryogenic cooling. The used oil has a crucial influence on the success of the technology. The aim of this study is to investigate the influence of oils from renewable resources with regard to their miscibility with carbon dioxide (CO2) and their spraying behavior. Ten different bio-based oils (synthetic ester, natural ester and fatty alcohol) have been examined regarding their suitability for CMQL compared to a conventional mineral hydrocrack oil. A validation based on sprayability and solubility properties with liquid CO2 has been performed. The sprayability and the resulting oil droplet size have an impact on the amount of oil entering the process zone and thus on the lubrication performance of the coolant concept. For this reason, a high-speed camera has been used to capture shadow images of the jet from an external cooling nozzle. In addition the width, intensity and uniformity of the oil application were evaluated. The solubility of the bio-based oils in CO2 is investigated in a static mixing chamber with varied mixing ratio. The miscibility of the bio-based oils in a single channel supply system was investigated with high-speed recordings of a dynamic mixing chamber. The results of the various experimental setups have been compared.
CHATTER DETECTION BASED ON A CONTACT SENSOR IN MILLING OPERATIONS
Authors:   MTA-BME Lendulet Machine Tool Vibration Research Group, Hajdu D. , Bachrathy D. ,   Department of Applied Mechanics, Budapest University of Technology and Economics
Published: October 2021

Chatter vibrations during machining operations are large-amplitude self-excited vibrations, which result in the loss of physical contact between the workpiece and the tool. This paper presents an electric contact sensor, which is used to detect the cutting and noncutting periods during the operation. The spectrum of the signal of the electric contact sensor is free from environmental noise and can be used to select the chatter frequencies as the boundary of stability is approached. The detection is automatic with the use of an analog phototransistor that helps the time-periodic sectioning of the measured signals. The presented approach makes chatter detection possible before harmful vibrations arise.
THE IMPACT OF KEY TEMPERATURE MEASURING POINTS ON THERMAL ERROR COMPENSATION MODEL TRANSFER BETWEEN MILLING CENTERS OF THE SAME PRODUCT LINE
Authors:   Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Production Machines and Equipment, RCMT, Straka M. , Mares M. ,   Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Production Machines and Equipment, RCMT, Horejs O. ,   Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Production Machines and Equipment, RCMT
Published: October 2021

Machine tool thermal errors are an important element in machined workpiece inaccuracies. In the past few decades, thermal errors have been successfully reduced by software compensation techniques such as multiple linear regression analysis, finite element method, neural network and transfer function (TF). A phenomenological approach based on TFs is used for thermal error compensation in this research. This approach respects basic heat transfer mechanisms in the MT structure and requires a minimum of additional gauges. Every MT is unique due to manufacturing inaccuracies in components, assembly processes (different preloads in bolts, deviations in the assembly and seating of components, etc.) or working environment (air-conditioned room or ordinary production hall). The aim of this paper is to investigate thermal error compensation model transfer between machines of the same product line to improve thermal error model prediction. Several milling centers of the same product line were tested with varying non-stationary activities of heat sources from linear axis movements and in varying working environments. The issue of key temperature point selection is considered.
Trial of DC Submersible Pump 12 Volt 50 Watt with Solar Power and Relationship between Water Discharge and Storage Height
Authors:   Study Program of Physics Education, Bosowa University of Makassar, Swandi Ahmad , Rahmadhanningsih Sri ,   Postgraduate Program, Institut Teknologi Bandung, Viridi Sparisoma ,   Department of Physics, Institut Teknologi Bandung, Sutjahja Inge Magdalena ,   Department of Physics, Institut Teknologi Bandung
Published: October 2021

One of the biggest problems for farmers in the dry season is the lack of water supply for irrigation. Currently, various types of pumps have been widely used, such as fuel pumps and pumps with PLN electricity. However, the costs required to operate these tools are pretty expensive. The solution to overcome this is using DC submersible pumps using solar panels as an energy source. The purposes of this study are to (1) determine the duration of operation of the DC submersible pump with the specifications of the battery and solar panels used, and (2) determine the productivity of the DC submersible pump in terms of the resulting discharge for various storage height conditions used. The research method used is an experimental research method using a quantitative approach. The results of this study are (1) DC submersible pump can operate for 240 minutes with 20 Ah battery at maximum voltage and uses 60 Wp solar panels, and (2) the height of the storage has an effect on the resulting discharge, there is a reduction in the resulting discharge every 0.5 meters increase in the height of the storage. Based on the analysis results, the maximum height limit for submersible pump push is 3.7 meters using a 3 per 4 inch hose. The results of this study can be a reference for farmers or users to determine the height of the water storage.
Reconstruction of Bandung Groundwater Basin Model Using Schlumberger Configuration Geoelectric Method
Authors:   Department of Mining Engineering, Universitas Muhammadiyah Tasikmalaya, Himawan Bayu , Amukti Rian ,   Department Center for Deep-Sea Research, Indonesian Institute of Sciences, Agustin Friska ,   Department of Mining Engineering, Institut Teknologi dan Sains Bandung, Mussoddaq Mochamad ,   Department of Geology Engineering, Institut Teknologi Bandung, Artyanto Andika ,   PT. Timah Tbk
Published: October 2021

Bandung is a city with rapid industrial development and a dense population. It causes the need for clean water to be huge, so it impacts groundwater extraction on a large scale. The Bandung Basin, which is a good reservoir for groundwater, will be disturbed if conservation and monitoring efforts are not carried out in the presence of groundwater. This study focuses on reconstructing the groundwater model in the Bandung Basin using the Schlumberger geoelectric method. After taking and analyzing the data, it was found that the resistivity value of the location of the presence of groundwater is depicted into three groundwater basins, namely the Bandung-Soreang groundwater basin, the Lembang groundwater basin, and the Batujajar groundwater basin. Unfettered aquifers, relatively aquitard in nature, are in the upper layer of the coal sandstone, claystone and sandstone units. The confined aquifer in the sand unit is under the sandy claystone layer.
INFLUENCE OF ORGANIC MANURES AND GIBBERELLIC ACID ON GROWTH AND YIELD OF STRAWBERRY (Fragaria X ananassa DUCH.)
Authors:   Nadia Krishi Vigyan Kendra, BCKV, ICAR, Gayeshpur, Nadia, West Bengal, India- 741234, Ansary S.H. , Mudi N. ,   Hooghly Krishi Vigyan Kendra, BCKV, ICAR, Chinsurah, Hooghly, West Bengal, India- 712102, Barui K. ,   Howrah Krishi Vigyan Kendra, BCKV, ICAR, Jagatballavpur, Howrah, West Bengal, India- 711408, Majumder A. ,   Howrah Krishi Vigyan Kendra, BCKV, ICAR, Jagatballavpur, Howrah, West Bengal, India- 711408, Gayen N. ,   Hooghly Krishi Vigyan Kendra, BCKV, ICAR, Chinsurah, Hooghly, West Bengal, India- 712102, Chowdhury A. K. ,   Hooghly Krishi Vigyan Kendra, BCKV, ICAR, Chinsurah, Hooghly, West Bengal, India- 712102
Published: October 2021

A field experiment was conducted to study the effect of organic manures and growth regulators on the growth and yield of two varieties of strawberry namely ‘Sweet Charlie’ and ‘Winter Dawn’. Six treatments were taken combining three organic manures viz. Vermicompost @ 3.0 t/ha, Mustard oil cake @ 1.0 t/ha and Neem cake @ 1.0 t/ha and two concentrations of gibberellic acid (GA3) viz. 75 ppm and 100 ppm along with a control. Foliar application of GA3 was carried out at 40 and 60 days after planting whereas organic manures were applied as basal dose. Results of the study suggested that higher doses i.e. 100 ppm of GA3 along with vermicompost exhibited more vegetative growth whereas 75 ppm GA3 resulted in higher fruit set and yield in both the varieties. It was found that vermicompost @ 3.0 t/ha combined with 100 ppm GA3 recorded the highest plant height (24.7 cm and 21.4 cm) and numbers of leaves per plant (46.0 and 68.7) in both Sweet Charlie and Winter Dawn varieties, respectively. Whereas, highest fruit diameter (3.3cm and 3.4cm), fruit length (4.6cm and 4.8cm), fruit weight (18.2 g and 17.9 g), number of fruits per plant (24.6 and 32.0), yield per plant (447.8 g and 572.1 g) and yield per hectare (18.80 t and 24.03 t) were recorded under vermicompost @ 3.0 t/ha in combination with 75 ppm GA3 in both Sweet Charlie and Winter Dawn varieties, respectively. It was observed that Winter Dawn variety produced a 28.0% higher yield as compared to Sweet Charlie under the best treatment i.e. vermicompost @ 3.0 t/ha in combination with 75 ppm GA3.
STUDY ON GROWTH PERFORMANCE, PRODUCTION, AND RETURN OF VIETNAMESE KOI (Anabas testudineus) FOR SOCIO-ECONOMIC UPLIFTMENT OF RURAL YOUTH IN MANIPUR, INDIA
Authors:   Krishi Vigyan Kendra, Imphal East, Central Agricultural University, Lamphelpat, Imphal- 795004, India, Salam M. A. , Bedajit Y. ,   Krishi Vigyan Kendra, Imphal East, Central Agricultural University, Lamphelpat, Imphal- 795004, India, Irungbam Surajkumar ,   Krishi Vigyan Kendra, Imphal East, Central Agricultural University, Lamphelpat, Imphal- 795004, India, Ramananda H. ,   Krishi Vigyan Kendra, Imphal East, Central Agricultural University, Lamphelpat, Imphal- 795004, India, Oinam Gunajit ,   Krishi Vigyan Kendra, Imphal East, Central Agricultural University, Lamphelpat, Imphal- 795004, India
Published: October 2021

The climbing perch fish Anabas testudineus, locally known as Ukabi, is one of the important freshwater small indigenous fish of Manipur. It is very popular in the state for its delicious taste and flavor. A study was carried out in nine experimental ponds (each size 0.25 ha) to assess survival rate, specific growth rate, absolute growth, production, and benefit-cost ratio of climbing perch (Anabas testudineus) for four months period during the year 2020. The experiment consists of three treatments T1 (P1& P2- stocking density with 80000 nos. fry/ha), T2 (P3 & P4 stocking density with 100000 nos. fry/ha), and T3 (P5 & P6 stocking density with 120000 nos. fry/ha). Water quality parameters of the test ponds were within the normal range for fish culture. As compared to T2 and T3, T1 was significantly higher in the specific growth rate (5.021±0.001%), absolute growth (113.25±0.18 g), production (1709.4±1.97 kg/0.25 ha), and benefit-cost ratio (3.28±0.19). Therefore, the present study was very important for the proper stocking density of its culture in the Manipur and NE region. It will help in the commercialization of its technique in maximization of production and income for the socio-economic upliftment of rural youth in the state.
fórmulas de tratamiento nominal: un rasgo de identidad lingüística en el habla juvenil
Authors: Mahecha-Ovalle Andrés
Published: October 2021

El artículo analiza si las fórmulas de tratamiento nominal son un rasgo de identidad lingüística en las comunidades de habla juveniles en la localidad de Kennedy, Bogotá D.C. La metodología se abordó desde cuatro etapas: selección de los informantes con la técnica del muestreo selectivo cualificado; elección de los instrumentos de recolección de datos (grabación espontánea, cuestionario sociolingüístico, entrevista a profundidad y grupo focal); organización del corpus y análisis de los datos obtenidos desde la perspectiva de la sociolingüística interaccional. Los resultados arrojaron una relación directa entre las fórmulas de tratamiento nominal como rasgo central de la identidad lingüística en habla juvenil de la comunidad de habla estudiada, la cual se configura a través de la conciencia lingüística, el comportamiento lingüístico, la cohesión grupal, las prácticas discusivas, la comunicación efectuada en los medios masivos de comunicación y las redes sociales. Se concluye que los diversos deícticos sociales son un rasgo definitivo de la identidad lingüística en el habla juvenil en los diversos escenarios comunicativos.
Generator Maintenance Scheduling Models for Electrical Power Systems: A Review
Authors:   General Company of South Electricity Distribution, Ministry of Electricity, Iraq, Muthana Shatha Abdulhadi , Ku-Mahamud Ku Ruhana
Published: October 2021

Interest in Generator Maintenance Scheduling (GMS) has increased due to the advent of demand-related expansion in size for modern power systems. Timely maintenance plays a significant role in minimizing failures and helps in averting cost incurred as a result of production shutdowns. The GMS problem is a complex and nonlinear optimization problem that specifies the schedule for carrying out planned preventive maintenance on power generation units. There is no clear concept to GMS model types and choosing the appropriate maintenance scheduling type. Thus, this paper presented a comprehensive review on GMS models in electrical power systems that covers the maintenance strategies, main elements of GMS models, and optimization methods used in solving GMS models. The list of references comprised related works from the years 2000 until 2020, which were classified into three based on the objectives. A new type of objective function for the GMS models was among the suggestions provided. A numerical example which focuses on a multi-objective GMS model and a proposed multi-objective Pareto ant colony system algorithm are also presented. The results of this review will not only enable researchers to gain a good overview of the existing GMS models for electrical power systems but also provide a source of references in choosing an appropriate maintenance scheduling strategy that is suitable with the type of generating unit and existing operating conditions.
Adapting to Uncertain Times: Implementing Integrated STEM Curriculum during the COVID19 Pandemic and the Impact on Student Attitudes
Authors:   The University of Sydney, Australia, Tully Deborah , Anderson Judy
Published: October 2021

The global pandemic in 2020 thwarted teachers’ plans to continue their integrated STEM curriculum implementation as school closures created the urgent need to use distance learning modes to support students. This study highlights the journey of one school that continued to offer STEM project-based curriculum during Covid19 using online learning platforms during one term, for half their cohort of students. The other half of students undertook their STEM project-based curriculum with face-to-face learning once students returned to school after restrictions were lifted. Following an explanatory sequential mixed-methods design (Creswell, 2013), this study explored the impact of blended learning, undertaken during Covid-19 restrictions, on student attitudes in STEM subjects. For students that completed two projects with face-to-face learning, there were no statistically significant differences in STEM attitudes. However, students that undertook STEM with blended learning during Covid19 restrictions indicated a significant increase in their attitude in mathematics. Interviews with three STEM teachers illuminate these findings.
The Influence of Teaching English in STEM Education for ESL Learners amidst a Changing World after COVID19
Authors:   School of Education, La Trobe University, Melbourne, Australia, Sultana Nahima , Kahwaji Huda , Kurup Premnadh M
Published: October 2021

With the globalising of education, discourse about the teaching of ESL (English as a second language) has contested ‘old’ literacy teaching and learning. Innovative approaches to language have changed perspectives about teaching and learning English in STEM (Science, Technology, Engineering and Mathematics) education and paved the way for ‘new’ developments of literacy practices. Yet, STEM education for ESL leaners is still standing in a disjuncture between the global digital forms of communication and traditional practices. This paper draws upon recent literature investigating the teaching of English for ESL learners to engage in a robust discussion about ESL teaching practices in STEM education. It presents some of the issues facing ESL teachers and learners, as well as the knowledge and skills that ESL practitioners must acquire and integrate into their classroom practice to successfully address these arising challenges. This paper presents a need to change the current pedagogical practices in STEM Education to consider ESL learners’ needs in today’s globalising and digital society, particularly in the midst of the rapid and continually evolving changes due to COVID19.
The study on Flexible Music Teaching Method of Innovative Poker Design
Authors:   Graduate Institute of Technological & Vocational Education, National Taipei University of Technology, Taipei City, Taiwan, Lin Teng-Chiao , Chen Hsing-Hui , Yang Wei-Chang , Chang Shao-Shiun , Yang Yu-Lin , Wu Shinn-Dar , Chang Yen-Chin
Published: October 2021

From ancient times to the present, music allows people to listen to music from different periods, understand its structure and expressions, perceive which nationality, region, age, and type of music, and then express its thinking at that time. The unique feeling of music creation is purposeful and connotative, which implies the author's life experience and thoughts, and can bring people beautiful enjoyment and express people's emotions. From the growth of learning, music plays an important role and is an important part of primary education. It is an effective tool for cultivating children's artistic literacy. Generally, music education in kindergartens has begun around the world. In ancient China, music was regarded as one of the six artistic abilities that scholars and scholars should possess. As for the formal music education in China, it continues until the end of nine years of compulsory education, that is, graduation from junior high school. At present, music education is also offered in ordinary high schools. This study found that learners can sing, express emotions and have a happy time with music. Afterwards, the music melody gives the listener motivation, comfort and peace, but from beginning to end, learners often only envy and cannot play. The reason can be summarized as a bunch of musical pokers such as "sprouts", during the period of enlightenment, especially in elementary school. After the learner recognizes the musical poker, it cannot be connected with the Sheet music, resulting in a great sense of distance in the recognition of notes, beats, and melody. Therefore, this study introduces innovative thinking courses combined with music education, which mainly discusses the training of sound sense and beat, and uses cross-field teaching to make musical pokers no longer unfamiliar.
Suggestions for Improving Geotechnical and Infrastructure Courses Teaching on Higher Education
Authors:   University of Thessaly, General Department of Larissa, Larissa, Greece, Alamanis Nikolaos , Papageorgiou Grigorios , Chouliaras Ioannis , Kotsopoulos Spyridon , Xafoulis Nikolaos , Farsirotou Evangelia
Published: October 2021

The purpose of this paper is to prepare questionnaire-based research proposals by undergraduate students for the Soil Mechanics course of the Dept. Civil Infrastructure Engineering, as well as postgraduate students for the course of Environmental Geotechnics of the Postgraduate Programme "Advanced Environmental Management Technologies in Engineering Works" of the General Department of Larissa of the University of Thessaly, with the ultimate goal being the upgrade of the classes. It is noted that the lecturers of the course participated in the evaluation of the Environmental Geotechnics course through a relevant questionnaire. The research strategy concerns the design of the questionnaire in conjunction with the objectives of the course. According to the curriculum, geotechnical courses aim to enable students to apply the methodologies for calculating the physical characteristics and mechanical properties of the soil, which functions either as a superstructure load recipient or as a structural material for the construction of geotechnical works. The questionnaires took into account the content of each lesson, students' preferences in the learning process, the ability to self-evaluate, evaluate and develop collaborations, the desired number of teaching hours available to cover the subject and the adequacy of the knowledge acquired in each module of the course. Finally, the students' responses were evaluated, and useful conclusions were drawn which could contribute positively to the qualitative improvement of the teaching of the above courses
A Preliminary Analysis of the Competency and Skills of Japanese IT Engineers in Managerial Positions
Authors:   Shibaura Institute of Technology, Saitama, Japan, Innes-Taylor Akiko Ryu , Yamazaki Atsuko , Inoue Masahiro , Matsumura Naoki , Hirata Fumiaki , Waki Katsutoshi
Published: October 2021

As globalization and digitization progress rapidly, the world as well as the talent in demand and the skills and competencies required are changing. Under these circumstances, every corporation is under great pressure to adopt its organization to prepare for the coming future changes. Therefore, a discussion about how to develop new leaders who are capable of tackling complex problems in the future is required. Although the demand for talent in science and engineering is increasing over the course of digitalization, many engineers struggle in management jobs, especially regarding intangibles. This study aims to measure the competency of Japanese Information Technology (IT) engineers, utilizing the Progress Report on Generic Skills (PROG) assessment tool to identify the talent development opportunities in the field of engineering and science. Thus, this study demonstrates that general competencies, such as teamwork, personal, and problem-solving skills, were more often exhibited by IT engineers with a background in social sciences and liberal arts compared with those with a background in engineering and science. The results suggest that engineers have both challenges and opportunities to grow their competencies by increasing their training in non-cognitive skills.
Reproductive health of parents
Authors: Yuzko O.M.
Published: October 2021

The reproductive health of parents is the onset and further physiological course of pregnancy, childbirth and health of the unborn child. Saving of reproductive health can be considered as protecting the family from factors with “reproductive toxicity”, that is lead to morphological and functional changes in the germ cells, organs and systems of embryo. The risk of infertility and miscarriage is significantly higher in couples where a man and a woman have balanced chromosomal rearrangements or gene polymorphisms. In the future, we will be able to block genotoxic lesions of the genome at the gene level.Research and development of experience on this issue continues. Now there are already some promising methods, which include nutritional support at the stage of pregnancy planning using folic acid and myo-inositol. New guidelines have been developed for folic acid, metafolin, MTHFR gene variants, and others. Neural tube defects are more common in people with MTHFR 677 CT and TT genotypes in countries where food folate fortification is not used, so they did not get enough of it. Women who are planning a pregnancy and have previously children with malformations are recommended to intake folic acid 4000 µg daily, starting 1 month before pregnancy and during the first 3 months of gestation.However, getting ready for pregnancy is much more than 3 or 12 months before conception. Preparing for pregnancy is a healthy lifestyle for parents from the moment they are conceived to their reproductive years. Saving of reproductive health is protection against genotoxic damage. Genotoxic substances act in different periods of life with different intensity of strength and time, therefore, the program for maintaining reproductive health should begin from the moment of conception of future parents. At the same time, the reproductive health saving program applies to both women and men.
Aligning Perceptual Preference with Instructional Method in a Recreational Environment
Authors: DeLoach Brian , Stone Whitley , Tolusso Danilo , Brown Mac , Cook Eric , DeLoach Guy , Lambert David , Rueping Tom
Published: October 2021

Aligning instructional modality with students’ perceptual preference (PP) or learning style is trending in educational research. However, there is little data to support this claim when instruction is geared toward a recreational activity, such as fly casting. The purpose of this investigation was to evaluate the effects of implementing matched or unmatched instructional methods with student PP. There was no difference in casting performance between groups matched with their learning preferences versus those who were not matched. The data support Hanson’s theory stating instruction should be dictated based on the content structure, not the learner’s PP. The researchers recommend a systematic, multifaceted approach to teaching novel motor skills such as fly casting. Further, this approach could be utilized for similar motions in sport and recreation. Subscribe to JOREL
Significance of High-Quality Physical Education Teachers
Authors: Cardina Catherine , James Alisa
Published: October 2021

This study investigated the extent to which public school K–12 staff in the United States teaching physical education were certified in physical education and had an academic major in physical education during the 2015–2016 school year. Data were collected from a nationally representative sample of public school teachers in the United States. Descriptive statistics were used in the description of physical education teachers’ certification and academic major. These characteristics were investigated with regard to school grade level, census region, urbanicity, and newly hired. Results showed that over 30% of public high school physical education teachers did not have an undergraduate or graduate degree in physical education. Nearly 20% of physical education teachers were not certified in physical education. Furthermore, less than 70% of physical education teachers had both characteristics of a qualified teacher. Results from this study show the need for an increase in the percentage of high-quality physical education teachers who have both teaching certification and an academic major in physical education, which would positively impact public health in the United States. Subscribe to TPE
Pensar con Sloterdijk. Antropotécnica, ejercicio y educación
Authors: Pulido Cortés Óscar , Espinel-Bernal Oscar , Castro Patarroyo Lizeth Ximena , Pérez Burgos Diego Fernando , Cárdenas Obregón Karen Andrea , Díaz Bernal Juan Guillermo , Mora Vanegas Diana Ximena , Montaña Contreras Deiscy Soraya , Cruz Vargas Iván Darío , Ojeda Suárez Manuel Alejandro , Alba Talero Miguel Ángel , Vargas Ingrid , Hurtado Johan , Patiño Cuervo Daniela , Torres-Torres Aura Marcela
Published: October 2021

El presente libro aborda los textos de Peter Sloterdijk en busca de nociones teórico-metodológicas para pensar los problemas de la educación, de la pedagogía y de la filosofía misma desde otras perspectivas. Al asumir la filosofía como una labor de problematización, emergen nociones como antropotécnica y ejercicio para dar forma a nuevas preguntas y a nuevas maneras de preguntar en el ámbito de la filosofía de la educación. La lectura de los textos de Sloterdijk lleva a escritos que indagan sobre las formas ejercitantes que rodean la enseñanza, el ser maestro, el aprendiz, el aprender y los cuerpos esculpidos por prácticas deportivas, la escritura y la lectura. Mediante estas técnicas, espacios y mecanismos, los seres humanos se hacen lo que son: humanos. Operar con problemas bajo esta perspectiva teórico-metodológica significa explorar las potencialidades de las herramientas para hacer uso de ellas e, incluso, para forjar otras aplicaciones, formas y posibilidades. Sin embargo, este uso debe sustentarse en la revisión, el conocimiento y la preparación de las herramientas, lo cual es el propósito de este libro, a partir de la aproximación al pensamiento de Sloterdijk.
KUTADGU BİLİG’DE “ERÜR” VE “TURUR” KULLANIMI ÜZERİNE
Authors: ABİK Ayşehan Deniz , ÇUBUKCU Melek
Published: October 2021

Çeşitli kaynaklarda "copula, predikat, ek eylem, ek fiil, koşaç, bildirme kipi, cevheri fiil, yardımcı fiil, isim fiil, salt fiil ( verbe absolu), verbe substantif" olarak adlandırılan, "er-" ve "tur-" ek fiillerinin kullanımı bu çalışmanın konusunu oluşturmaktadır. İsimden yüklem yapan bu ek fiillerin, çalışmada yalnızca geniş zaman 3. tekil kişi çekimleri ele alınmıştır. Kutadgu Bilig'in beyitlerinin tamamı "erür" ve "turur" ile “ol” ve “ermez” kullanımı bakımından incelenmiş, ilgili yapılar beyitlerde kullanıldığı kelimelerle birlikte ele alınmış, beyit numaraları da verilerek Türkiye Türkçesine aktarımlarıyla sunulmuştur. Çalışmanın amacı "erür" ve "turur" yapılarının hangi durumlarda kullanıldığının tespit edilmesi ve aralarında var olması muhtemel sayılan farkların tespit edilmesidir. Bunun için Türkçe isim, alıntı isim, sıfat, zamir, zarf, edat, isim çekim ekleri, fiil çekim ekleri, yapım ekleri ve fiilimsiler ile birlikte kullanılan "erür" ve "turur"un genel olarak oranları da verilerek ilgili yapıların kullanımına dair bir yorum yapma imkânı doğmuştur.
Comparative evaluation of obesity-related parameters in junior sumo wrestlers and children with obesity
Authors: Ogawa Miori , Sagayama Hiroyuki , Tamai Shinsuke , Momma Reiko , Hoshi Daisuke , Uchizawa Akiko , Ichikawa Go , Arisaka Osamu , Watanabe Koichi
Published: October 2021

[Purpose] Exercise is a key factor in preventing obesity and metabolic syndrome. Sumo wrestlers increase their body size from childhood for athletic advantage; however, the risk of metabolic syndrome in junior sumo wrestlers is undetermined. Preventive measures against pediatric obesity should be initiated during childhood to prevent obesity in adulthood, considering its high global incidence. We comparatively evaluated the risk factors for metabolic syndrome in junior sumo wrestlers and children with obesity.[Methods] We enrolled 70 male children (age 9–17 years [sumo group, n = 14] and 9–14 years [other sports and non-exercise groups, n = 28 each]) and evaluated their anthropometric parameters (height, weight, body mass index z-score, obesity rate, waist circumference, waist to height ratio) and hematological parameters (total, low-density, high-density, and non-high-density lipoprotein-cholesterol; triglycerides; plasma glucose, and glycated hemoglobin levels).[Results] The BMI z-score, obesity rate, waist circumference (p < 0.05, along with the non-exercise group), and systolic blood pressure were significantly higher and the high-density cholesterol level was lower in the sumo group than in the other sports group (p < 0.05). The waist to height ratio was significantly higher in the non-exercise group than in the other sports group (p < 0.05). No significant difference was found in other blood lipid, plasma glucose (significantly lower level than the reference range in the sumo group, p < 0.05), and glycated hemoglobin (within the reference range in all groups) levels among the three groups.[Conclusion] Junior sumo wrestlers had a larger body size and higher blood pressure than children with obesity who exercised regularly. This provides direction for future research into targeted preventive interventions against metabolic syndrome for junior sumo wrestlers with large body size.
Pengaruh Konsentrasi Aktivator Asam Fosfat (H3PO4) pada Pembuatan Karbon Aktif dari Sabut Kelapa terhadap Adsorpsi Logam Kromium
Authors: Sholikhah Hamida Ishmatu , Putri Hartika Rahma , Inayati Inayati
Published: October 2021

Chromium is one of the hazardous heavy metal contained in the industrial wastewater. It can be reduced by various methods, such as adsorption. The purpose of this study was initialized an activated carbon from coconut fiber by various phosphoric acid (H3PO4) activator concentration (0,1M; 0,5M; 1M; 1,5M; 2M) and variation of contact time (30; 60; 90; 120; 150; 180 minutes) to obtain optimum adsorption capacity of chromium. Analysis of the activated coconut fiber carbon by SAA obtained a surface area of 53,39 m2/g. The potassium chromate (K2CrO4) solution was adsorbed by the adsorbent and then analyzed by a UV-VIS Spectrophotometer to measure the chromium content. This study proved that chromium adsorption by activated coconut fiber carbon was increased by the time until reaching optimum condition. Enhancement of adsorption capacity was directly proportional as the more concentrated phosphoric acid activator. Maximum adsorption capacity obtained was 3,464 mg/g and the optimum condition was at contact time of 150 minutes with the phosphoric acid activator concentration of 2M.
Biosorption of Chromium from Textile Wastewater Using Mimosa pudica Tannin Gel
Authors: Ramadhan Yanuar Bekti , Sabrina Aida Nur , Kwartiningsih Endang
Published: October 2021

The heavy metal content is very dangerous because it can pollute the environment. One of the heavy metals waste commonly found in the textile industry is chromium (Cr). Mimosa pudica is a weed plant and its availability is very abundant. However, it also contains tannin which can be developed into tannin gel biosorbent to adsorption heavy metal content in the wastewater. The purpose of this research is to study Mimosa pudica tannin as a Cr biosorbent from textile wastewater. There are two steps to synthesis tannin gel biosorbent. They are the tannin extraction and the condensation polymerization process. Tannin is easily soluble in water so the condensation polymerization process is needed to make it insoluble in water. The extraction of Mimosa pudica tannin was done using water solvent. The condensation polymerization process was done by the reaction of tannin extract and formaldehyde. The Cr content of textile industry wastewater in the Pasar Kliwon, Surakarta was 4 ppm. The results of the biosorption of Cr heavy metal using Mimosa pudica tannin gel showed that the remaining Cr heavy metal was 0.7098 ppm. It was already below the threshold which was 1 ppm.

 

Keywords: biosorption, condensation polymerization, extraction, Mimosa pudica, tannin gel
Machine Learning Identification of Lymph Node Metastasis in women with early-stage epithelial ovarian cancer: a SEER population-based study
Authors: Zhu Xiu-jie , Fang wen-lai , xu chao-yi
Published: October 2021

Objective

Emerging evidence indicates that nearly 20% of patients with incompletely staged early-stage ovarian cancer develop to advanced stage because of lymph node metastases. The aim of the present study is to establish machine learning (ML) based predictive models for lymph node metastasis (LNM) in early-stage epithelial ovarian cancer (EOC).
Methods

The Surveillance, Epidemiology, and End Results (SEER) database was used to select patients diagnosed with early T classification epithelial ovarian cancer (EOC) between 2010 and 2015. The possibility of LNM was predicted by comparing the six ML algorithms. Model performance was compared in terms of accuracy, sensitivity, specificity, F1 score, and the area under the curve (AUC). The Shapley Additive Explanation (SHAP) analysis was employed to generate explanations and was presented as patient-specific visualizations.
Results

Screening of the SEER database yielded 3400 patients with early-stage epithelial ovarian cancer, and the data were divided randomly into a training set (70%), validation set (15%), and test set (15%). A grid search with 10-fold cross-validation was performed on the training set to tune the parameters. Overall, the Random Forest (RF) (accuracy of 79.8% and AUC of 0.878) was the best performing classifier and the Extreme Gradient Boosting (XGBoost) (accuracy of 77.2% and AUC of 0.857) demonstrated a similar high performance. The RF model performance was highly dependent on five top-rank features, including histology, grade, marital status, chemotherapy, and tumor size. SHAP analysis provided model-agnostic interpretation illustrating significant clinical contributors associated with risks of LNM in early-stage epithelial ovarian cancer (EOC).
Conclusions

The established ML-based prediction model for LNM in early-stage EOC is valid and valuable in improving clinical decision-making.
AnchoisFert: A New Organic Fertilizer from Fish Processing Waste for Sustainable Agriculture
Authors: Muscolo Adele , Mauriello Francesco , Marra Francesco , Calabrò Paolo Salvatore , Russo Mariateresa , Ciriminna Rosaria , Pagliaro Mario
Published: October 2021

The “AnchoisFert” solid residue comprised of milled anchovy leftovers after fish oil extraction with biobased limonene is a powerful organic fertilizer. Employed to promote the growth of Tropea’s red onion (Allium cepa), the fertilizer turns out to largely superior to commonly used organic (manure) and chemical (NPK) fertilizers. Rich in proteins, organic carbon, flavonoids, magnesium, potassium, phosphate and sulphate, and devoid of antibiotics and antibiotic resistance genes, the new organic fertilizer can replace both conventional organic and inorganic fertilizers. The discovery closes the fishing material cycle for one of the most fished species across the seas opening the route to a new class of organic fertilizers of exceptional performance derived from abundant biowaste via a low-cost, environmentally-friendly circular economy process.
Study protocol for a randomized clinical trial to evaluate the effect of the use of Xylitol gum in the prevention of caries lesions in children living in Ladakh – the Caries Prevention Xylitol in Children (CaPreXCh) trial
Authors: Cagetti Maria Grazia , Cocco Fabio , Calzavara Ezio , Augello Davide , Zagpoo Phunchok , Campus Guglielmo
Published: October 2021

Background: Ladakh is region of the larger region of Kashmir and Jammu administered by India. Only few data on oral health of Ladakh’s population are available. The aim of the present protocol will be to record the caries prevalence of primary and permanent molars of schoolchildren living in Ladakh and to implement a school-based Xylitol program, named the Caries Prevention Xylitol in Children (CaPreXCh) trial, using chewing gums. Methods: The protocol is designed as a triple-blind randomized, controlled, parallel-group clinical trial in children aged 5-14 years. The study should have be carried out from August 2021 to August 2024 in Zanskar Valley (Ladakh), but COVID-19 pandemic does not allow today to make predictions on the exact start. Participants will be randomly allocated into two groups: subjects who will receive a chewing gum with Xylitol (70% w/v) as only sweetener, and those who will a sugared chewing gum containing Maltitol (23% w/v). The subjects will be instructed to chew a total of 6 pellets for 5 min divided into 3 intakes a day (2 in the morning, 2 after the midday meal and 2 in the afternoon) for one school-year. Clinical examination will comprise an oral examination in which caries index (ICDAS scores), bleeding on probing and plaque pH evaluation after sucrose challenge will be recorded at baseline (t0); clinical examination will be repeated after 12 months since the beginning of the chewing gum administration period (t1), after another 12 months period (t2) and finally after further 12 months (t3) (24 months from the end of the chewing gum use). The primary outcome will be the caries increment measured both at enamel and dentinal level on primary and permanent molars. Data analysis will be conducted through Kaplan-Meyer graphs to evaluate caries increment. A comparison of the methods will be carried-out with Cox regression with shared frailty. The net caries increment for initial, moderate and severe caries level, using ICDAS (Δ-initial, Δ-moderate and Δ-severe), will be calculated. Discussion: This trial will be the first trial in India assessing the effect of chewing gum containing only Xylitol as sweetener for caries prevention in children. Name of the registry Clinical trials.gov ClinicalTrials.gov Identifier: NCT04420780 Registered June 9, 2020
Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device
Authors: Ishizu Hiroshi , Yamamori Hirotake , Arisawa Shunichi , Tokiwa Kazuyasu , Tanaka Yasumoto
Published: October 2021

Applying a radian phase shift other than 2π is a key issue for superconducting circuits, such as flux qubits. The magnetic flux is useful when generating a phase shift. However, a quantized magnetic flux accompanying a trapped vortex in a superconductor does not have a phase shifter function. The magnetic flux generated by an external field generates noise. In this study, we propose a phase bias system that does not require an external field during operation. We confirm the phase shift of a direct current superconducting interference device (SQUID) placed on an ultrathin superconducting Nb bilayer with a through-hole by cooling it to a temperature below the superconducting transition temperature with an external field. Although the cause of the phase shift in our system is unclear, we believe that it may be caused by a fractional quantum in the bilayer. When the SQUID is replaced by a qubit, the phase shift can be applied to a phase bias.