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2021 ◽  
Vol 2139 (1) ◽  
pp. 012019
Author(s):  
J H Arévalo-Ruedas ◽  
E Espinel-Blanco ◽  
E Florez-Solano

Abstract Cutting tools have great use in the industry for their great effectiveness at the time of use, but it is important to know what the proper use is, because the misuse or constant use of such tools, can cause excessive wear and tear that will reduce tool life. There are different methods and equations to measure the useful life of the tool, it is important to know its state so that at the time of being used in a machining process does not cause irreversible damage to the part. One of the most well-known equations is the Taylor equation where they relate useful lifetime to cutting speed. This project was developed in order to demonstrate, by means of equations and graphs, the lifetime and wear of the cutting tools, as well as the application of statistical equations that allow the analysis of the results obtained in the laboratory; a statistical study was able to evaluate the wear on the cutting tool, obtaining statistically the useful life of the tool in each machining process and calculate in the same way the total useful life of the tool.


2021 ◽  
Vol 11 (11) ◽  
pp. 696
Author(s):  
Marco Giliberti

The paper contains progress reports supported by data about two short activities aimed at introducing physics themes in primary school. The first is a formal storytelling intervention named “Mommy Comet” carried out in first- and fifth-grade classes and concerning motion in the absence of forces in the Solar System broad context. The second is an informal work with third-, fourth- and fifth-degree students to investigate what physics is about. The results obtained by analyzing questionnaires and conducting interviews show how these narrative tools can offer wide potentialities and prove great effectiveness in introducing young students to physics.


Author(s):  
Mohit Tyagi ◽  
◽  
Dilbagh Panchal ◽  
Deepak Kumar ◽  
R. S. Walia ◽  
...  

The current research work deals with an identification of different lean strategies and extraction to relevant strategies after discussion with experts and gives the answer of a question “how lean manufacturing strategies can help the organization to enhance the efficiency of the organization with great effectiveness?” In this research work, thirty-six lean strategies have been identified and out of which thirteen lean strategies were filtered in respect of highly importance value by factor analysis using software SPSS 21. Further, to identify and analyze the inter-relationship among filtered strategies, an Interpretive Structural Modeling (ISM) with Fuzzy Matriced’ Impacts Croise´s Multiplication Applique´e a UN Classement (MICMAC) approach has been used. Fuzzy MICMAC help to understand the dependence and driver’s power of the lean strategies. The mutual importance of extracted strategies has been discussed through developing the ISM model and the individual assessment of each strategy with each of the other strategies has been derived using the Fuzzy MICMAC approach.


2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Fei-long Wei ◽  
Haoran Gao ◽  
Xiaodong Yan ◽  
Yifang Yuan ◽  
Shu Qian ◽  
...  

Abstract Full-endoscopic transforaminal lumbar discectomy (FETD) is increasingly used in patients with lumbar disc herniation (LDH). There is little knowledge on the related factors, including the straight leg raising test (SLR), that influence the operation. Consecutive patients with LDH who came to our hospital from August 2015 to September 2016 and underwent FETD surgery were included. Four kinds of scores, including the VAS (lumbar/leg), ODI and JOA values, were measured and reassessed after FETD to assess the surgical outcomes. There was a statistically significant difference between the scores before surgery and at each postoperative follow-up. In addition, the increase in the JOA score postoperatively was statistically significant compared with that before surgery. There were statistically significant differences among the three subpopulations [patients considered SLR positive (0°–30°), SLR positive (31°–60°) and SLR negative (61°–)] in the changes in the VAS (leg), ODI and JOA values. However, there were no statistically significant differences among the three subpopulations [patients considered SLR positive (0°–30°), SLR positive (31°–60°) and SLR negative (61°–)] in the changes in VAS score (lumbar). FETD showed great effectiveness in treating patients with lumbar disc herniation. Patients who were SLR negative may receive greater benefit from FETD.


2020 ◽  
Author(s):  
Hongchao Fang ◽  
Pengtao Xie

Pretrained language models such as BERT, GPT have shown great effectiveness in language understanding. The auxiliary predictive tasks in existing pretraining approaches are mostly defined on tokens, thus may not be able to capture sentence-level semantics very well. To address this issue, we propose CERT: Contrastive self-supervised Encoder Representations from Transformers, which pretrains language representation models using contrastive self-supervised learning at the sentence level. CERT creates augmentations of original sentences using back-translation. Then it finetunes a pretrained language encoder (e.g., BERT) by predicting whether two augmented sentences originate from the same sentence. CERT is simple to use and can be flexibly plugged into any pretraining-finetuning NLP pipeline. We evaluate CERT on three language understanding tasks: CoLA, RTE, and QNLI. CERT outperforms BERT significantly.<br>


2020 ◽  
Author(s):  
Hongchao Fang ◽  
Pengtao Xie

Pretrained language models such as BERT, GPT have shown great effectiveness in language understanding. The auxiliary predictive tasks in existing pretraining approaches are mostly defined on tokens, thus may not be able to capture sentence-level semantics very well. To address this issue, we propose CERT: Contrastive self-supervised Encoder Representations from Transformers, which pretrains language representation models using contrastive self-supervised learning at the sentence level. CERT creates augmentations of original sentences using back-translation. Then it finetunes a pretrained language encoder (e.g., BERT) by predicting whether two augmented sentences originate from the same sentence. CERT is simple to use and can be flexibly plugged into any pretraining-finetuning NLP pipeline. We evaluate CERT on three language understanding tasks: CoLA, RTE, and QNLI. CERT outperforms BERT significantly.<br>


2020 ◽  
Vol 13 (4) ◽  
pp. 86
Author(s):  
Chunxia Fu

Cohesion Theory of Halliday and Hasan has been widely applied in different parts of language teaching. As many cohesive devices are used in language, it&rsquo;s very necessary for language learners to understand and identify those devices. Now in China, a large number of college students have to take part in the CET-4 test every year. Thus, it is of great significance that some effective strategies can be applied in the test and help more students pass the test easily. Cohesion Theory and cohesive devices may be such strategies and they are important for the improvement of reading comprehension of CET-4. This article is aiming to use the CET-4 test papers in June 2019 as examples to illustrate that Cohesion Theory can be applied in reading comprehension of CET-4 with great effectiveness.


2020 ◽  
Vol 209 ◽  
pp. 04001
Author(s):  
Lev Belyaev ◽  
Lyudmila Chudinova ◽  
Sergei Podkovalnikov

Results of the next round of studies on Russian interstate electric ties are described. A part of the Eurasian region including European and Siberian part of Russia and countries of Central Asia, Caucasus, Southern Asia and Middle East is considered for 2040 target year. Great effectiveness of creation of interstate power grid in this region is shown.


2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Tesa Puteri Permatasari ◽  
Dini Hadiarti ◽  
Raudhatul Fadhilah

ABSTRACTThe results and retention of student learning is still low in learning the concept of mole due to the difficulties of students to understand the concept and the lack of ability to resolve the matter of calculation. This study aimed to determine the differences in the results and retention of learning between the students who were taught with and without using mind-map media based on tier training method in the material of mole concept, knowing the great effectiveness of mind-map media based tier training method toward the results and retention of students in the material of mole concept at X grade students of SMAN 8 Pontianak. This research used Quasi Experimental Research with control group design. This research used purposive sampling with X MIA 4 as the experimental class and X MIA 3 as the control class. The techniques of collecting data used measurement techniques, observation and interviews, while the data collection tools used the test results and retention of learning, observation sheet and questionnaire. Mann-Whitney U test as the data analysis showed that there were some differences in learning while the t-test showed that there were differences in retention of learning. The results of the data showed that there were differences in learning outcomes and retention between the students who were taught with and without mindmap media based on tiered training method. Learning by using mind-map media gave effectiveness to the result of students learning outcomes which 24,86% categorized as medium category, the retention of student learning for 8 days was 28,52% categorized as medium category.Keywords: learning outcomes, tier training method, mind-map, retention


Author(s):  
Cristine Yuri Schincaglia ◽  
Graziela Camargo dos Santos ◽  
Juliana Aparecida Ribeiro ◽  
Renata Yamashiro de Bueno Figueiredo ◽  
Simone Menezes ◽  
...  

O parto é um processo natural que ocorre nas mulheres. A mulher deve ser participante ativa deste processo, reconhecendo seu corpo e suas necessidades para o parto, tornando o parto humanizado. Quando a mulher não entra em trabalho de parto espontaneamente, instrumentos e fármacos que irão induzir e/ou conduzir seu trabalho de parto podem ser utilizados de uma forma segura e eficaz. A ocitocina e o misoprostol são os fármacos de primeira escolha, pois demonstram muita efetividade nestes processos e são de baixo custo. O objetivo deste trabalho é descrever os efeitos positivos e negativos do uso de ocitócitos na indução e condução do parto normal. Para tanto, realizou-se uma revisão da literatura, a partir de artigos levantados em bases de dados eletrônicas, periódicos brasileiros e internacionais indexados encontrados na Biblioteca Virtual em Saúde (BVS), SciELO, LILACS e manuais governamentais, entre 2010 a 2016. Concluiu-se que, o uso da ocitocina deve ser avaliado criteriosamente devido aos efeitos colaterais que podem ocorrer, aumentando a monitorização e limitações da parturiente.Descritores: Parto Obstétrico, Trabalho de Parto Induzido, Ocitocina. AbstractThe consequences of the use of oxytocics during childbirthChildbirth is a natural process that occurs in women. Woman should be an active participant in this process, recognizing her body and her needs for childbirth, making the humanized delivery. When the woman does not go into labor spontaneously, instruments and drugs can be used that will induce and / or conduct her labor, safely and effectively. Oxytocin and Misoprostol are the drugs of choice because they demonstrate great effectiveness in these processes and have low cost. The objective is to describe the consequences of using oxytocics for induction and conduction of normal labor. Therefore, we made a literature review, based on articles collected in electronic databases in indexed Brazilian and international journals found in the Virtual Health Library (VHL), Scielo and Lilacs from 2010 to 2016. The conclusion is that the use of oxytocin should be evaluated carefully because of side effects that may occur, increasing monitoring and limitations of the parturient.Descriptors: Induction of Labor, Induced Labor, Oxytocin. ResumenLas consecuencias de la utilización de oxitócitos durante el partoEl parto es un proceso natural que se produce en la mujer. La mujer debe ser un participante activo en este proceso, reconociendo su cuerpo y sus necesidades para la entrega, tornando el parto humanizado. Cuando una mujer no entra en trabajo de parto espontáneo, se puede utilizar los instrumentos y medicamentos para inducir y/o conducir su trabajo de parto de forma segura y eficaz. La oxitocina y el misoprostol son los fármacos de primera elección, ya que muestran una gran efectividad en estos procesos y son de bajo costo. El objetivo de este estudio es describir cuáles serán las consecuencias del uso de oxitócitos para la inducción y conducción del parto normal. Con este fin, hemos realizado una revisión de la literatura desde artículos en las bases de datos LILACS y manuales governamentales, entre los años 2010 hasta el 2016. Se concluye que el uso de oxitocina debe evaluarse con cuidado debido a los efectos secundarios que pueden ocurrir, aumentando la monitorización y las limitaciones de la parturienta.Descriptores: Inducción del Trabajo de Parto, Parto Inducido, Oxitocina.


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