scholarly journals Experimental research on influence of functional parameters of combined installations designed at separating the impurities out of cereal seeds

2019 ◽  
Vol 112 ◽  
pp. 03004
Author(s):  
Carmen Brăcăcescu ◽  
Ioan Ţenu ◽  
Costin Mircea ◽  
George Bunduchi
Keyword(s):  
Experimental Research ◽  
Quality Index ◽  
Oscillation Amplitude ◽  
Specific Weight ◽  
Work Surface ◽  
Experimental Installation ◽  
Aerodynamic Properties ◽  
Surface Work ◽  
Separation Degree ◽  
Mechanical Shaker

The paper presents the experimental installation, the methodology and measuring apparatus used for experimental research of qualitative indexes of impurities separation out of grain seeds for combined separating systems (according to specific weight and aerodynamic properties of seeds). The experimental installation used was composed of a gravimetric separator with mechanical shaker with unbalanced masses (mounted on the platform working surface) and an aspiration installation with fan. The experimental research has aimed at quantitative and qualitative influence on separation quality index of the following operating parameters: material flow rate of shaking separator, the air flow of aspiration installation, tilting work surface, work surface oscillation amplitude. Based on data obtained by measurements and qualitative indicators the separating process indexes have been determined, namely: degree of impurities separation, degree of good seeds loss, as well as, the separation quality index for different types of combinations of separation installation parameters.

Steel Slag as a Substitute for Natural Aggregate in the Production of Concrete

2015 ◽  
Vol 244 ◽  
pp. 77-87 ◽  
Author(s):  
Vojtěch Václavík ◽  
Tomáš Dvorský ◽  
Vojtěch Šimíček ◽  
Marcela Ondová ◽  
Jan Valíček ◽  
...  
Keyword(s):  
Experimental Research ◽  
Steel Slag ◽  
Volume Ratio ◽  
Shape Index ◽  
Specific Weight ◽  
Strength Properties ◽  
Absorption Capacity ◽  
Concrete Mixture ◽  
Powder Density ◽  
Natural Aggregates

This article presents the results of an experimental research dealing with the use of steel slag as a partial substitute for natural aggregates in the production of concrete composite. Comparative mixture based on natural aggregates was prepared from the fractions of 0/4, 4/8 and 8/16 mm, which were represented in the volume ratio of 40:30:30. During the experimental research, natural aggregates with the fractions of 4/8 mm, 8/16 mm were replaced with steel slag of the same faction. We have tested the input properties of natural aggregates and steel slag for the designed experimental mixtures (grain size, density, specific weight, powder density, absorption capacity, resistance to crushing, shape index). In case of concrete mixture prepared according to the experimental recipes, we have monitored the following characteristics: density of fresh concrete mixture, consistency of concrete mixture, strength characteristics - cube strength after 3, 7, 14, 21, 28 and 90 days, prism strength after 28 days. The research has discovered that substitution of natural aggregates with steel slag of the same fraction in concrete mixture is possible, without significantly affecting the strength properties of the concrete based on steel slag in comparison with the concrete based on natural aggregates.

scholarly journals BACK MASSAGE PADA KUALITAS TIDUR IBU HAMIL TRIMESTER III

2020 ◽  
Vol 6 (4) ◽  
pp. 408-412
Author(s):  
Yuli Yantina ◽  
Nita Evrianasari
Keyword(s):  
Sleep Quality ◽  
Pregnant Women ◽  
Experimental Research ◽  
Quality Index ◽  
Pittsburgh Sleep Quality Index ◽  
P Value ◽  
Paired Sample ◽  
Massage Intervention ◽  
Back Massage

ABSTRACT  Background: During pregnancy, pregnant women will experience a variety of changes in reproduction that are physiological and sometimes pathological. Sleep difficulties are generally more common in early pregnancy. Then this sleepless complaint will reappear at the end of pregnancy. Persistent sleep disorders will interfere with the physical and psychological pregnant women.                Purpose of this study is to know the effect of back massage on sleep quality of trimester III pregnant women  Methods: Research type experimental research, design pre experiment designs with one group pretest posttest design. Population in this research is trimester mother III at BPM Tiara Iswantika Wonosari District of Pekalongan Regency of East Lampung year 2018, sample taken counted 29 people with purposive sampling technique. Analysis in this research use paired sample t test.Results of statistical tests showed that the mean maternal sleep quality score on the measurement result using the Pittsburgh Sleep Quality Index (PSQI) questionnaire before (pretest) the back massage intervention was 6,28±1,461 and after (posttest) the back massage intervention was 5, 03±1,349 with an mean difference of 1,241±0,739. In result of paired sample t test showed back massage proved to have an effect on to sleep quality of pregnant woman trimester III (p-value 0,000 <a0,05). Conclusion: With the results of this study is expected pregnant women can do back massage therapy to reduce tension, relax the body and improve sleep quality.Suggestion Currently there is still no counseling related to back massage, so health workers should be able to provide back massage counseling to pregnant women because back massage has become part of supporting therapy in the health sector to improve health status, especially in improving the quality of sleep for pregnant women. Keywords : Sleep quality, back massage ABSTRAK  Latar Belakang: Pada masa kehamilan, ibu hamil akan mengalami berbagai perubahan pada sistrem reproduksi yang bersifat fisiologis dan terkadang bersifat patologis. Kesulitan tidur umumnya lebih banyak dialami pada awal kehamilan. Kemudian keluhan sulit tidur ini akan kembali muncul pada akhir kehamilan. Gangguan tidur yang  terus menerus akan mengganggu fisik dan kejiwaan ibu hamil.Tujuan: diketahuinya pengaruh back massage terhadap kualitas tidur ibu hamil trimester III    Metodologi: Jenis penelitian experimental research, desain pre experiment designs dengan rancangan one group pretest posttest. Populasi dalam penelitian ini adalah ibu trimester III di BPM Tiara Iswantika Wonosari Kec. Pekalongan Kab. Lampung Timur tahun 2018, sampel yang diambil sebanyak 29 orang dengan teknik purposive sampling. Analisis dalam penelitian ini menggunakan uji paired sample t test.Hasil: uji statistik menunjukkan bahwa Rata-rata skor kualitas tidur ibu hamil pada hasil pengukuran menggunakan kuesioner the Pittsburgh Sleep Quality Index (PSQI) sebelum (pretest) intervensi back massage adalah 6,28±1,461 dan setelah (posttest) intervensi back massage adalah 5,03±1,349 dengan selisih rata-rata 1,241±0,739. Pada hasil uji paired sample t test menunjukkan back massage terbukti berpengaruh terhadap kualitas tidur ibu hamil trimester III (p-value 0,000<a0,05). Kesimpulan: Dengan hasil penelitian ini diharapkan ibu hamil dapat melakukan terapi back massage untuk menurunkan ketegangan, merileksasi tubuh dan meningkatkan kualitas tidur.Saran Saat ini masih belum ada penyuluhan terkait back massage maka hendaknya bagi tenaga kesehatan dapat memberikan penyuluhan back massage kepada ibu hamil karena back massage telah menjadi bagian dari terapi penunjang dalam bidang kesehatan untuk meningkatkan derajat kesehatan terutama dalam meningkatkan kualitas tidur ibu hamil. Kata Kunci : Kualitas tidur, back massage 

scholarly journals РОЗРОБЛЕННЯ ЕКСПЕРИМЕНТАЛЬНОЇ УСТАНОВКИ ДЛЯ ВИПРОБУВАНЬ ПРОГРАМНО-АПАРАТНИХ ЗАСОБІВ УПРАВЛІННЯ МІКРОЕНЕРГЕТИЧНИМИ МЕРЕЖАМИ ЛОКАЛЬНИХ ОБ’ЄКТІВ

2021 ◽  
Vol 148 (4) ◽  
pp. 14-24
Author(s):  
О. О. Шавьолкін ◽  
І. О. Шведчикова ◽  
Г. В. Кругляк ◽  
Р. М. Марченко ◽  
А. В. Пісоцький
Keyword(s):  
Experimental Research ◽  
Radiation Power ◽  
Practical Importance ◽  
Photovoltaic System ◽  
Storage Battery ◽  
Experimental Setup ◽  
Daily Cycle ◽  
Static Tests ◽  
Experimental Installation ◽  
Software And Hardware

Development of the experimental installation for testing of the software and hardware tools of management of a photovoltaic system of a local facility connected to the grid, which, along with checking its operability, will allow analyzing the operation and adjusting the settings of systems with different parameters under different weather conditions, load schedules and operating modes. Method. Experimental research with preliminary justification of settings based on calculations and simulation data obtained in the Matlab software package. Results.  The  structure  and  experimental  installation  on  the  base  of  the  photovoltaic  system  with storage  battery  and  using  a  photovoltaic  battery  emulator  with  software  control  of  generation  and  load power were developed. The software modules of the system have been developed. According to the results of the simulation, the moments of time are determined when the operating mode is switched in the experimental setup. The experimental setup was tested in static and dynamic modes. Static tests were aimed at checking the functioning of the photovoltaic battery emulator in accordance with the specified solar radiation power and  the  temperature  of  the  photo  module,  as  well  as  checking  the  correctness  of  the  model  used  in  the program. Tests in statics with fixed parameters and in dynamics in the daily cycle, in general, confirmed the efficiency of the proposed solutions. Scientific novelty. The method of experimental research in the daily cycle of photovoltaic systems control with the use of software-controlled emulators of a photovoltaic battery and load with power and time scaling  was  developed.  This,  along  with  the  acceleration  of  the  experiment,  allows  us  to  estimate  the effectiveness  of  the  tested  systems  at  different  ratios  of  system  parameters  and  adjust  the  functioning algorithms.  Practical  importance.  The  proposed  solutions  for  the  implementation  of  the  experimental installation  allow  minimizing  material  costs  and  time  costs  in  the  process  of  testing  and  development  of software and hardware control tools of a photovoltaic system with storage battery.

scholarly journals Vertical differential grout pump experimental studies methods validation

2019 ◽  
Vol 1 (52) ◽  
pp. 30-37
Author(s):  
Vitalii Nadobko
Keyword(s):  
Experimental Research ◽  
Research Method ◽  
Experimental Studies ◽  
Hole Diameter ◽  
Experimental Sample ◽  
Experimental Installation ◽  
National Technical

The article is devoted to creation and substantiation of experimental research method of vertical differential grout pumpwith flowing piston mark РН 2-4, developed by researchers at Poltava National Technical Yuri Kondratyuk University.Experiments type has been substantiated, variation intervals of the studied parameters values have been determined, thepreparation of the experimental sample of the grout pump for research has been described, an experimental installation for researchhas been designed, the measuring means have been selected, the conditions for performing the experiments have beendetermined. This technique enables to find the rational values for the following parameters of the solution pump when workingwith plaster solutions of different displacement: working body frequency movement, diameter, mass and height of liftingover the valve, the hole diameter in the valve sockets.

scholarly journals RESEARCH ON SEED SEPARATION PROCESS ON A GRAVITY-CASCADE SEPARATOR

2020 ◽  
pp. 173-180
Author(s):  
Igor Dudarev ◽  
Lyudmyla Zabrodotska ◽  
Vasyl Satsiuk ◽  
Iryna Taraymovich ◽  
Vasyl Olkhovsky
Keyword(s):  
Flow Rate ◽  
Tilt Angle ◽  
Quality Index ◽  
Separation Process ◽  
Aerodynamic Properties ◽  
Separator Operation

Different designs of separators are used for separating seeds. The principle of separator operation is based on various physical, mechanical and aerodynamic properties of seeds. Gravitational separators are promising because energy is not spent on separation process in this type of separators. A gravity-cascade separator was proposed, in which the separator sections are connected like “scissors”. The sieve length was theoretically justified, taking into account the condition for passing a small fraction of seeds into the sieve holes. The influence of sieves tilt angle and seed flow rate from hopper on the quality index of separation process was studied experimentally

Homocysteine Levels Show Significant Differences among Mediterranean Dietary Quality Index Variables Compared to Folate and Vitamin B12 Status in Women

2015 ◽  
Vol 85 (3-4) ◽  
pp. 202-210 ◽  
Author(s):  
Ivona Višekruna ◽  
Ivana Rumbak ◽  
Ivana Rumora Samarin ◽  
Irena Keser ◽  
Jasmina Ranilović
Keyword(s):  
Mediterranean Diet ◽  
Diet Quality ◽  
Quality Index ◽  
Fruits And Vegetables ◽  
Reproductive Age ◽  
Dietary Quality ◽  
Vitamin B ◽  
Cross Sectional ◽  
Poor Diet ◽  
The Mediterranean

Abstract. Results of epidemiologic studies and clinical trials have shown that subjects following the Mediterranean diet had lower inflammatory markers such as homocysteine (Hcy). Therefore, the aim of this cross-sectional study was to assess female diet quality with the Mediterranean diet quality index (MDQI) and to determine the correlation between MDQI, homocysteine, folate and vitamin B12 levels in the blood. The study participants were 237 apparently healthy women (96 of reproductive age and 141 postmenopausal) between 25 and 93 years. For each participant, 24-hour dietary recalls for 3 days were collected, MDQI was calculated, and plasma Hcy, serum and erythrocyte folate and vitamin B12 levels were analysed. Total MDQI ranged from 8 to 10 points, which represented a medium-poor diet for the subjects. The strength of correlation using biomarkers, regardless of group type, age, gender and other measured parameters, was ranked from best (0.11) to worst (0.52) for olive oil, fish, fruits and vegetables, grains, and meat, in this order. Hcy levels showed the best response among all markers across all groups and food types. Our study shows significant differences between variables of the MDQI and Hcy levels compared to levels of folate and vitamin B12 in participants with medium-poor diet quality, as evaluated according to MDQI scores.

Secondary Transfer Effect of Contact

2009 ◽  
Vol 40 (2) ◽  
pp. 55-65 ◽  
Author(s):  
Thomas F. Pettigrew
Keyword(s):  
Cognitive Dissonance ◽  
Experimental Research ◽  
Intergroup Contact ◽  
Transfer Effect ◽  
Evaluative Conditioning ◽  
Transfer Effects ◽  
Secondary Transfer ◽  
Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

Review of Foundations of Experimental Research. 3rd ed.

1983 ◽  
Vol 28 (10) ◽  
pp. 805-805
Author(s):  
Roger E. Kirk
Keyword(s):  
Experimental Research
Sign in / Sign up

Export Citation Format

Share Document