scholarly journals The method of assessing the quality of the excavation workmanshift in the underground coal mine

2019 ◽  
Vol 106 ◽  
pp. 01002
Author(s):  
Marcin Cholewa ◽  
Stanisław Duży
Keyword(s):  
Underground Coal Mine ◽  
Final Grade ◽  
Tightening Torque ◽  
Mine Roadway ◽  
Quality Category ◽  
Roadway Support ◽  
Rock Strata ◽  
Excavation Performance ◽  
Breach Width

A new method of assessing the quality of the heading workmanship was proposed in this article. The method includes 13 parameters characterizing the quality of excavation performance, namely: the heading breach width, the heading useful height, the heading useful width, the angle of inclination of arch, the horizontal offset of arch (direction), the vertical offset of arch (cancellation), distance between mine roadway support, the arch set overlap length, the tightening torque of clamps screws, development of struts, dadding and the contact of support with rock strata. For each element of the excavation the number of quality points is determined based on by the amount of multiples of the quality statistics QN from the qualifying constant. After adding up the points, the final grade is obtained in the form of the quality category. The conclusion is an example of the evaluation of the quality of heading workmanship according to the developed method.

scholarly journals Effect of Fertileader® Vital on green pea maturation

2013 ◽  
Vol 19 (3-4) ◽  
Author(s):  
N. Mendler-Drienyovszki ◽  
J. Dobránszky
Keyword(s):  
Economic Importance ◽  
Fertilizer Treatment ◽  
Measuring Time ◽  
Foliar Fertilizer ◽  
Quality Class ◽  
Green Pea ◽  
Quality Category ◽  
Canning Industry ◽  
Green Peas

The changes of tenderness of three green pea varieties with different maturity were studied after Fertileader® Vital fertilizer treatment. The fertilizer treatment caused signifi cant differences in the tenderness of treated plants in every year. After the second measuring time; the treated plants showed better quality than the control ones. The treated varieties kept their tenderness longer due to this foliar fertilizer, the yield have better quality so even better suited to the requirement of canning industry. Use of Fertileader® Vital is of an economic importance because high economic benefi t can be realized in one hectare after Fertileader® Vital treatment. By using this foliar fertilizer 12,840 HUF extra profi ts can be realized by producing green peas of I. quality class instead of yield with II. quality category. This extra profit could increase to 447,840 HUF considering that green peas belong still to the II. quality class after fertilizer treatment when the quality of non-treated plants are no more suitable for the canning industry.

scholarly journals Study of changes in the technological performance of raw cotton when storing

2021 ◽  
Vol 54 (4) ◽  
pp. 30-36
Author(s):  
Orif Zh. Murodov ◽  
Mansurbek E. Ruzmetov
Keyword(s):  
Shelf Life ◽  
Mass Fraction ◽  
Technological Performance ◽  
Short Fibres ◽  
Quality Category

The results of the experiments showed that with an increased density of raw cotton that occurs in the lower layers of the bundle and an increase in its shelf life, an increase in the mass fraction of defects and trash in the fibre is observed. It was found that with an increase in the density of raw cotton more than 250 kg/m3, the mass fraction of defects and weeds in the fibre increases by almost 10 %, the damage to seeds by 6 %, the staple mass length decreases by 3 %, and the proportion of short fibres by 9 %. The increase in the shelf life of the fibre also negatively affects the quality of the fibre and seeds and, most importantly, cotton for grades III–V. An increase in the mass fraction of flaws and trash in the fibre, in turn, affects the unevenness of the yarn and the quality category of the resulting yarn.

scholarly journals Strength and Weakness Characteristics of Using Polymer Based Alternative to Steel Mesh In Underground Coal Mine Strata

2019 ◽  
Vol 2 (1) ◽  
pp. 37
Author(s):  
Akash Talapatra
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Coal Mine ◽  
Underground Coal Mine ◽  
Elongation At Break ◽  
Steel Mesh ◽  
Mesh Material ◽  
Underground Roadway ◽  
Roadway Support ◽  
Break Yield

Nowadays a viable development of polymer based material as an alternative to the steel mesh material has been increased at a notable amount for providing enough support in the underground roadways. This feasibility study done on the development of using polymer based alternative is related with both of the chemical & physical properties of the selected material. If the polymer alternative has a considerable amount of capability to tolerate all the physical & material constraints equal to or above the normal steel mesh, then the possibility of using polymeric alternatives have been increased at a greater extent. For this reinforcement test, an experiment practice would be done by comparing the mechanical properties of the steel mesh with the polymeric material such as modulus property, elongation-at-break, yield stress etc. After that, a suitable polymer based alternative will be applied for underground roadway support in upcoming days.

scholarly journals Aplication of Image Processing to Determine The Freshness of Tilapia Fish (Oreochromis niloticus)

2019 ◽  
Vol 22 (2) ◽  
pp. 229-235
Author(s):  
Ayu Kalista ◽  
Amin Redjo ◽  
Umi Rosidah
Keyword(s):  
Image Processing ◽  
Storage Time ◽  
High Quality ◽  
Fresh Fish ◽  
A Value ◽  
Red Color ◽  
Quality Category ◽  
Independent Variable ◽  
High Quality Category

The quality of fresh fish will decrease immediately after death. One of the indicators of fish quality is the changes of the gills color. The aim of this research was to determine the changes of red color in the gills of tilapia using image processing as an indicator of fish freshness. The research method used is the Explanatory Research where the independent variable (x) is tilapia which stored at room temperature for 12 hours. The dependent variable (y) was the intensity value of red. The quality of fish could be grouped into several categories, such as high quality, good quality, limit of acceptability and spoilt. The Observation was carried out with a time of 0 hours to 12 hours (4 hour interval). The results showed that storage time affected the deterioration of fresh quality. The high quality category has a red percentage value of 82.18%. Fresh category has a red percentage value of 67.10%. The limit of acceptability category has a value of 38.52% and the spoiltcategory has a red percentage value of 9.92%.

scholarly journals Cost-Effectiveness of Multiple Sclerosis Disease-Modifying Therapies: A Systematic Review of the Literature

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
David Yamamoto ◽  
Jonathan D. Campbell
Keyword(s):  
Cost Effectiveness ◽  
Simulation Models ◽  
Primary Outcome Measure ◽  
Multiple Sclerosis Disease ◽  
Life Years ◽  
Quality Category ◽  
The Cost ◽  
Effectiveness Studies

Objective. To provide a current and comprehensive understanding of the cost-effectiveness of DMTs for the treatment of MS by quantitatively evaluating the quality of recent cost-effectiveness studies and exploring how the field has progressed from past recommendations.Methods. We assessed the quality of studies that met our systematic literature search criteria using the Quality of Health Economic Studies validated instrument.Results. Of the 82 studies that met our initial search criteria, we included 22 in this review. Four studies (18%) achieved quality category 2, three studies (14%) achieved quality category 3, and 15 studies (68%) achieved the highest quality category 4. 91% of studies were simulation models. 13 studies (59%) had quality-adjusted life years (QALYs) as the primary outcome measure, included a societal perspective in the analysis, and utilized time horizons of 10 years to lifetime.Conclusions. To continue to improve the cost-effectiveness evidence of DMTs, we recommend: lifetime horizons, societal perspectives, and QALYs; supplemental evidence with shorter horizons, payer perspectives, and clinical outcomes to inform multiple decision makers; development of modeling and input standards for comparability; head-to-head RCTs between DMTs and long-term prospective studies; and comprehensive cost-effectiveness studies that compare all appropriate DMTs.

Numerical Simulation Analysis of Different Coal Mine Roadway Support Effect

2013 ◽  
Vol 807-809 ◽  
pp. 2356-2360 ◽  
Author(s):  
Guang Yi Sun ◽  
Xiao Luo
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Simulation Analysis ◽  
Support Effect ◽  
Surrounding Rock ◽  
Anchor Cable ◽  
Mine Roadway ◽  
Coal Wall ◽  
Roadway Support

The application of FLAC2D software long ditch coal mine extraction tunnel without support boltgrouting. Anchor when the anchor rope supporting and strengthening supporting state ofroadwaywere simulated and analyzed the change of roadway surrounding rock under differentsupport forms. Demonstrated the possibility that the current anchor cable anchor supporting andanalysis under the condition of the coal wall broken grouting bolt is the necessity of reinforcement.

scholarly journals PENGEMBANGAN BUKU AJAR BAHASA INDONESIA DENGAN MODEL CIRC UNTUK MENINGKATKAN KETERAMPILAN LITERASI BERBAHASA SISWA KELAS V SD

2018 ◽  
Vol 4 (1) ◽  
pp. 638
Author(s):  
Finna Rahma Hijria
Keyword(s):  
Mixed Method ◽  
Test Score ◽  
Development Stage ◽  
Literacy Skills ◽  
Model Quality ◽  
Quality Category ◽  
Language Literacy ◽  
Quantitative Descriptive ◽  
Bahasa Indonesia

ABSTRACTThe purpose of this study is to develop a Indonesian textbook CIRC model to improve language literacy skills of  125th">  grade elementary students. The specific objectives of this study are (1) to describe the process of developing Indonesian textbooks with CIRC model to improve students’ language literacy skills of elementary school classrooms, (2) to describe the quality of Indonesian texsbooks with CIRC model. Quality developed textbooks is reviewed based on products and their use in the classroom. This development study referred to the four-D development model which consists of four stages (1) define; (2) design; (3) develop,and (4) disseminate. However, this research was only limited at the development stage without doing dissemination because this research product was for trial school in particular. The data collection used documentation technique, observation, questionnaire, and test. The obtained data was analysed by qualitative-quantitative descriptive (mixed method). The results from this research 90,62% of material feasibility, 92,5% of presentation feasibility, 100% language feasibility, and 86,36% feasibility was gotten from the research results. All of those percentagesbelonged to the good quality category (proper). The results from the observation toward teacher and students’ activity were 89,2% and 92,04%. The teacher and students’ responses toward CIRC model in Bahasa Indonesia textbook were 87,5% and 83,33%. The students’ average test score was 82,63 meet a students’ standard competence of 75. Keywords: Textbook Elaboration, Language Literacy, CIRC Model. ABSTRAK                                                                                          Tujuan umum penelitian ini adalah mengembangkan buku ajar Bahasa Indonesia dengan model CIRC untuk meningkatkan keterampilan Literasi berbahasa siswa kelas V SD. Adapun tujuan khusus penelitian ini adalah (1) mendeskripsikan proses pengembangan buku ajar Bahasa Indonesia dengan model CIRC untuk meningkatkan keterampilan literasi berbahasa siswa kelass V SD, (2) mendeskripsikan kualitas buku ajar Bahasa Indonesia dengan model CIRC. Kualitas buku ajar yang dikembangkan ditinjau berdasarkan produk dan penggunaannya di kelas. Penelitian pengembangan ini mengacu pada model pengembangan four-D yang terdiri atas tahap (1) pendefinisian; (2) perancangan; (3) pengembangan; dan (4) penyebaran. Akan tetapi, penelitian ini hanya sampai pada tahap pengembangan tanpa melakukan penyebaran karena produk penelitian ini hanya dikhususkan sekolah uji coba. Pengumpulan data dilakukan menggunakan teknik dokumentasi, observasi, angket, dan tes. Data yang diperoleh dianalisis secara deskriptif kualitatif-kuantitatif. Berdasarkan hasil penelitian diperoleh hasil persentase kelayakan materi 90,62%, kelayakan penyajian 92,5%, kelayakan kebahasaan 100%, dan kelayakan kegrafikaan 86,36%. Semua kategori tersebut termasuk kategori berkualitas (sangat layak/baik). Perolehan hasil observasi terhadap aktivitas guru dan siswa berturut-turut adalah 89,2% dan 92,04%. Respon guru dan siswa terhadap buku ajar Bahasa Indonesia model CIRC adalah 87,5% dan 83,33%. Rata-rata hasil belajar siswa sebesar 82,63 yang sesuai dengan kriteria ketuntasan yaitu 75.Kata Kunci: Pengembangan Buku Ajar, Literasi Berbahasa, Model Pembelajaran CIRC.

scholarly journals Efecto de la calidad de un curso sobre manejo poscosecha en la motivación, aprendizaje y rendimiento estudiantil en la Universidad Estatal a Distancia de Costa Rica

2012 ◽  
Vol 4 (2) ◽  
pp. 259-271
Author(s):  
Carmen Andrés
Keyword(s):  
Costa Rica ◽  
Learning Process ◽  
Final Grade ◽  
Alternative Evaluation ◽  
Evaluation Instruments ◽  
Postharvest Handling ◽  
And Performance

En la UNED de Costa Rica, el rendimiento, motivación y aprendizajede los estudiantes son los tres ejes centrales en los que la Cátedra deAgroindustria se está enfocando a partir del año 2012 para mejorarla calidad de los cursos y dar una mejor atención a los estudiantes. Lahipótesis que la cátedra plantea es que si se toma en cuenta la situación de cada estudiante y el proceso de aprendizaje no se basa solamente en una nota final, mayor será su motivación, rendimiento y aprendizaje. Se trabajó el curso Manejo poscosecha I, impartido en el I cuatrimestre del 2012, realizando a) una evaluación del nivel de motivación de los estudiantes a través de una encuesta y la indagación de su situación específica y b)un análisis de su rendimiento y nivel de aprendizaje a través del estudio de dos instrumentos de evaluación: foro y examen. Se encontró que los estudiantes no responden de manera positiva a actividades de evaluación alternativa si no tienen porcentaje en la nota final, que no reciben suficiente retroalimentación sobre sus evaluaciones y que prefieren tener más tutorías presenciales. Se encontró también que el nivel de aprendizaje no está relacionado positivamente con el rendimiento obtenido en la nota final del Foro 1, mientras que sí está relacionado en el primer examen ordinario. Se concluye que el aprendizaje de los estudiantes no se mide por completo con una nota final y la situación específica de cada estudiante debe considerarse para mejorar su motivación, aprendizaje y rendimiento. Se recomienda introducir cada vez más la evaluación alternativa en los cursos de la Cátedra de Agroindustria, sin dejar de lado las situaciones específicas de cada estudiante.ABSTRACTEffect of the quality of a postharvest handling course in the motivation,learning process and performance of students at the Distance StateUniversity of Costa Rica. Performance, motivation and knowledge of thestudents are the three central axes in which the Agroindustry chair hasbeen working since the year 2012 to improve the quality of its coursesand take care of the students in a better way. My hypothesis was that ifeach student situation is taken into account, and the learning processis not based only on a final grade, there would be better motivation,knowledge and performance. The Postharvest handling course (first termof 2012) at UNED was investigated through: a) an evaluation of the levelof the students’ motivation with a survey and inquiry about their specificsituation and b) an analysis of their performance and knowledge levelthrough the judgment of two evaluation instruments: Forum 1 and thefirst exam. The students do not respond in a positive way if the alternativeevaluation activities lack a percentage in the final grade, or they do notget enough feedback about their evaluations; the prefer to have morepresential tutorials. Knowledge is negatively correlated with the finalgrade obtained by the students in Forum 1, but positively related to thefirst exam. The knowledge of the students is not completely measuredwith a final grade and individual situations must be taken into accountto increase motivation, performance and knowledge. I recommend theinclusion of alternative evaluation activities in the Agroindustry chairwithout leaving behind the specific situations of each student.

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