Research on the relationship between rock stress level and the occurrence of rock burst

2011 ◽  
pp. 793-796
Author(s):  
H Ji ◽  
Y Zhang ◽  
Z Hou
Keyword(s):  
Rock Burst ◽  
Stress Level ◽  
Rock Stress ◽  
The Relationship

scholarly journals HUBUNGAN ANTARA PERSEPSI TERHADAP KEBISINGAN DENGAN STRES KARYAWAN

Jurnal Ecopsy ◽  
2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Juliana Sari Pratiwi ◽  
Hemy Heryati Anward ◽  
Silvia Kristanti Tri Febriana
Keyword(s):  
Data Collection ◽  
Key Words ◽  
Stress Level ◽  
Random Sampling ◽  
Positive Relationship ◽  
Sampling Technique ◽  
Education Level ◽  
Machine Operators ◽  
The Subject ◽  
The Relationship

Penelitian ini bertujuan untuk mengetahui hubungan antara persepsi terhadap kebisingan dengan stres karyawan PT. PLN (Persero) PLTU Sektor Asam Asam. Subjek penelitian ini adalah karyawan / pekerja lapangan bagian operator mesin pada PT. PLN (Persero) PLTU Sektor Asam Asam, dengan kriteria karyawan / pekerja yang berjenis kelamin pria. Jumlah subjek penelitian sebanyak 40 orang. Subjek dipilih dengan menggunakan teknik purposive random sampling. Subjek penelitian berusia 20 tahun sampai dengan 50 tahun. Tingkat pendidikan subjek penelitian adalah STM Mesin berjumlah 14 orang, STM Listrik berjumlah 9 orang, D1 Mesin berjumlah 3 orang, D1 Listrik berjumlah 8 orang, D3 Mesin berjumlah 4 orang dan S1 Tehnik Mesin berjumlah 2 orang. Instrumen yang digunakan dalam pengumpulan data adalah Kuesioner untuk mengukur Persepsi Terhadap Kebisingan dan Skala untuk mengukur Stres. Sebelum digunakan instrumen-instrumen ini diujicoba terlebih dahulu. Hasil penelitian menunjukkan bahwa koefisien korelasi Persepsi Terhadap Kebisingan dengan Stres adalah ( r = 0,482 dengan p = 0,003 (p < 0,01) ). Hal ini menunjukkan bahwa ada hubungan positif antara persepsi terhadap kebisingan dengan stres karyawan PT. PLN (Persero) PLTU Sektor Asam Asam diterima. Jadi, semakin tinggi persepsi terhadap kebisingan, maka semakin tinggi pula tingkat stres, dan semakin rendah tingkat persepsi terhadap kebisingan, maka semakin rendah pula tingkat stres.  Kata kunci : Persepsi terhadap kebisingan, stress This study aims to determine the relationship between perceptions of noise with the stress of employees PT. PLN (Persero) PLTU Sektor Asam Asam. The subject of this study were employees / workers in the field of machine operators PT. PLN (Persero) PLTU Sektor Asam Asam, the criteria of employees / workers who are male. The number of subjects is 40 people. Subjects were selected using purposive random sampling technique. Subjects aged 20 years to 50 years. The subjects education level is STM Machine totaled 14 people, STM Electrical totaled 9 people, D1 Machine totaled 3 people, D1 Electrical totaled 8 people, D3 Machine totaled 4 people and S1 Techniques Machine totaled 2 people. Instruments used in data collection are questionnaires to measure Perception of noise and Scale to measure stress. Prior to use these instruments are tested first. The results showed that the correlation coefficient Perceptions of noise with the Stress is ( r = 0.482 with p = 0.003 (p <0.01) ). This suggests that there is a positive relationship between perceptions of noise with the stress of employees PT. PLN (Persero) PLTU Sektor Asam Asam be accepted. Thus, the higher the perception of noise, the higher the stress level, and the lower the perceived level of noise, then the lower the stress level. Key words : The perception of noise, stress

scholarly journals A Small Sample Prediction Method for Engineering p-S-N Curve

2018 ◽  
Vol 36 (5) ◽  
pp. 831-838 ◽  
Author(s):  
Xiaoran Liu ◽  
Qin Sun ◽  
Ke Liang
Keyword(s):  
Fatigue Life ◽  
Aluminium Alloy ◽  
Stress Level ◽  
Bayesian Method ◽  
Polynomial Chaos ◽  
Least Squares Method ◽  
Prediction Method ◽  
Optimization Method ◽  
Small Sample ◽  
The Relationship

Based on Non-intrusive Polynomial Chaos method, a small sample prediction method for engineering p-S-N curve that has a medium fatigue life is proposed. Parameters in Basquin model are calculated through optimization method based on small sample of observed fatigue life. We establish NIPC polynomials and obtain big sample parameters, obtaining probabilistic properties of parameters with the big sample EDF method. Then the relationship between statistics and stress level are fitted with least squares method. Some new samples are introduced to improve the accuracy of the method. The statistics are updated by Bayesian method. Samples parameters under any stress level are obtained to calculate corresponding fatigue life. Probabilistic properties of fatigue life are predicted, and the p-S-N curve is established. Test observations of aluminium alloy T-2024 are all located in the interval of 95% quantile, showing that the method can effectively predict probabilistic properties of medium fatigue life.

scholarly journals The Relationship between Nutritional Status, Sleep Duration, Stress Level with Blood Pressure of Nurse Night Shift in the Hospital: Cohort Study

2019 ◽  
Vol 4 (1) ◽  
pp. 55
Author(s):  
Salmawati Salmawati ◽  
Ari Natalia Probandari ◽  
Sapja Anantanyu
Keyword(s):  
Blood Pressure ◽  
At Risk ◽  
Nutritional Status ◽  
Sleep Duration ◽  
Stress Level ◽  
Night Shift ◽  
Anthropometric Measurement ◽  
Short Sleep Duration ◽  
Stress Levels ◽  
The Relationship

Objective: Hypertension as a cardiovascular disease occurs due to an uncontrolled increase in blood pressure. Night shift nurses with more overweight, short sleep duration, and excessive stress levels are at risk of increase blood pressure. This study aims to analyze how the relationship between obesity, nutritional status, sleep duration and stress level influence the blood pressure of the night shift nurses.Materials and methods: The subjects in this study were night shift nurses in four hospitals. The dependent variable was blood pressure and the independent variables were nutritional status, sleep duration, and stress levels. This study was an observational analysis with a perspective cohort design in which the subjects were 312 night shift nurses. Nutritional status were identified from Body Mass Index (BMI) through anthropometric measurement, sleep duration by looking at average hours of sleep during the night service, stress levels through the Perceived Stress Scale (PSS-10) questionnaire. Blood pressure was measured using a mercury sphygmomanometer. Data were analyzed by Chi-square test and Logistic Regression.Results and Discussion: There was a significant relationship between nutritional status, sleep duration, and stress levels with blood pressure. The results of the multivariate analysis showed that the shift nurses with overweight (obesity) nutritional status are at a risk of having disorder 1.97 times, the shift nurses with sleep duration < 6 hours are at risk of having disorder 3.78 times and shift nurses with intermediate stress level at risk of having disorder 2.08 times with enhancement blood pressure.Conclusion: There is a relationship between nutritional status, sleep duration and stress level with blood pressure. Sleep duration mostly influences the blood pressure.International Journal of Human and Health Sciences Vol. 04 No. 01 January’20 Page : 55-59

scholarly journals Identifying Stress Level Among Gamers Using Electroencephalogram Signals

2020 ◽  
Vol 6 (2) ◽  
pp. 42-46
Author(s):  
Norzaliza MNor ◽  
Sheik Dawood Mohamed Rafi ◽  
Muhammad Arif Othman
Keyword(s):  
Stress Level ◽  
Negative Emotion ◽  
Induce Stress ◽  
Mel Frequency Cepstral Coefficients ◽  
Experimental Procedure ◽  
Brain Signals ◽  
Result Show ◽  
The Subject ◽  
To Come ◽  
The Relationship

This research is conducted to identify stress level among gamer using Electroencephalogram Machine (EEG). Electroencephalogram machine or better known as EEG machine is a machine used by neuroscientists to read brain signals activity through various number of channels. The brain signals collected from subjects using 19 channels EEG machine which is DABO Machine. The problem in this research study is to find out if game can induce stress. The expected outcome of this research is that brain signal collected from subjects could give enough evidence about the relationship between playing game and stress level in their daily activities. Objective of the research is to design experimental procedure suitable for understanding the bio-signal of subjects inducing stress and to understand the relationship between four basic emotion (Happy, Calm, Fear, Sad) and the emotion while playing the games. In our research methodology, we focus on five difference stages to complete the research. The stages start with the data collection, pre-processing, features extraction classification and lastly analysis. Later, we able to come out with the result of our research about the stress level for the subject. The experiment was conducted by following a standard protocol experiment for EEG machine. This data will be analysed using Mel Frequency Cepstral Coefficients (MFCC) as feature extraction, and multilayer perceptron (MLP) as classifier. The result show that the subject has positive emotion which is calm and happy at the beginning and ending of playing the game. At the beginning, subject only start with demo, so the subject did not feel pressured and at the end we assumed that the subject feel relieved because of ending the game. After certain time playing the game, the subject starting to have negative emotion until the end of the game. This happen because of subject started to feel stress after plays the higher level of the game. Based on the result, we can conclude that game can induce stress among gamers

Research Foundation of Rock-Burst Hazard Control for Mining Pattern with No Pillar

2010 ◽  
Vol 156-157 ◽  
pp. 207-210
Author(s):  
Zhi Jie Wen ◽  
Lian Jun Chen ◽  
Xiao Dong Zhao ◽  
Chuan Zhang
Keyword(s):  
Rock Burst ◽  
Abutment Pressure ◽  
Relevant Information ◽  
Mechanics Model ◽  
Working Face ◽  
Hazard Control ◽  
Time Space ◽  
Relationship Of ◽  
The Relationship ◽  
Realization Condition

In order to effectively prevent the rock burst occurrence for mining patter with no pillar, the reason and its realization condition of rock burst were studied; the stope structure mechanics model with working face mining was built; four phases of rock burst occurrence with mining were proposed; the relationship between rock burst occurrence and abutment pressure law of development was analyzed, time-space coupling relationship of rock burst and its relevant information for rock burst control were obtained.

scholarly journals Investigating the Relationship Between Perceived Stress and Leisure Coping Strategies among University Students: Eskişehir Technical University Case

2020 ◽  
Vol 13 (6) ◽  
pp. 67
Author(s):  
Hüseyin Çevik
Keyword(s):  
University Students ◽  
Coping Strategies ◽  
Perceived Stress ◽  
Stress Level ◽  
Leisure Activities ◽  
Active Participation ◽  
Negative Effects ◽  
Coping With Stress ◽  
Recreation Programs ◽  
The Relationship

The problems university students face during their education life often lead to undesirable situations as stress resources. Thus, various methods, techniques and strategies are employed in order to avoid negative effects of stress in their lives. Leisure is one of the effective methods in coping with stress, and leisure coping strategies are &ldquo;leisure companionship&rdquo;, &ldquo;leisure palliative coping&rdquo; and &ldquo;leisure mood enhancement&rdquo;. However, there are few studies in the literature focusing on the relationship between these strategies and perceived stress. Exploring this relationship is believed to provide valuable insights for university administrations so that they might offer effective recreation programs for their students. Therefore, this study aims to examine the relationship between perceived stress and leisure coping strategies. In addition, it examines whether there is a difference in perceived stress and strategies according to time spent for leisure activities and type of leisure participation. The participants of the study are 338 students, who were determined by using convenience sampling method. The data were collected through a survey that consists of three parts. The first part includes Perceived Stress Scale (PSS), the second one Leisure Coping Strategies Scale (LCSS) and the third one demographic questions about the participants. The data were analyzed by using Pearson Moment-Product correlation, t-test and ANOVA analyses. According to the findings, there is a negative significant relationship between perceived stress level, leisure coping strategies and its subdimensions. The study also found that perceived stress level of the participants who prefer passive participation in leisure activities is significantly different from that of those who prefer active participation. Similarly, the participants who prefer passive participation in leisure activities is significantly different from those who prefer active participation in terms of leisure coping strategies. In conclusion, the study contributes to the literature with these valuable findings and provides important insights for university campus recreation programs and services.

scholarly journals Mechanical Stresses Induced by Compression in Castings of the Load-carrying Grate

2016 ◽  
Vol 16 (2) ◽  
pp. 51-54
Author(s):  
J. Słowik ◽  
A. Drotlew ◽  
B. Piekarski
Keyword(s):  
Heat Treatment ◽  
Stress Distribution ◽  
Stress Level ◽  
Stress Transfer ◽  
State Of Stress ◽  
Structure Changes ◽  
Load Carrying ◽  
The Relationship ◽  
Forced Movement

Abstract The main aim of this study was to examine the compression-induced state of stress arising in castings of the guide grates during operation in pusher-type furnaces for heat treatment. The effect of grate compression is caused by its forced movement in the furnace. The introduction of flexible segments to the grate structure changes in a significant way the stress distribution, mainly by decreasing its value, and consequently considerably extends the lifetime of the grates. The stress distribution was examined in the grates with flexible segments arranged crosswise (normal to the direction of the grate compression) and lengthwise (following the direction of force). A regression equation was derived to describe the relationship between the stress level in a row of ribs in the grate and the number of flexible segments of a lengthwise orientation placed in this row. It was found that, regardless of the distribution of the flexible segments in a row, the stress values were similar in all the ribs included in this row, and in a given row of the ribs/flexible segments a similar state of stress prevailed, irrespective of the position of this row in the whole structure of the grate and of the number of the ribs/flexible segments introduced therein. Parts of the grate responsible for the stress transfer were indicated and also parts which play the role of an element bonding the structure.

Sign in / Sign up

Export Citation Format

Share Document