scholarly journals Plant communities of the Karkas Hunting-Prohibited Region, Isfahan-Iran

2008 ◽  
Vol 54 (No. 8) ◽  
pp. 347-358
Author(s):  
S.J. Khajeddin ◽  
H. Yeganeh
Keyword(s):  
Plant Communities ◽  
Random Sampling ◽  
Dominant Species ◽  
Sampling Method ◽  
Bare Soil ◽  
Cluster Analyses ◽  
Isfahan Province ◽  
Biogeographic Region ◽  
The Impact ◽  
Interesting Area

The Karkas mountainous region is a very interesting area for its big game wildlife and rare species in the Irano-Touranian biogeographic region. It is essential to study the plant communities and the impact of environmental factors, to protect and rehabilitate these ecosystems. The studied region is located in the Isfahan province, central Iran, with the area of about 92 100 ha. The aim of the study was to identify the plant communities of the Karkas Hunting-Prohibited Region. Vegetation cover was sampled using a stratified random sampling method and the entities were preliminarily segmented with the physiognomic-floristic-ecologic method. 10 × 10 m quadrates (100 m<sup>2</sup>) were used to estimate the species cover, litter, stone, gravel and bare soil percentages. Plant communities were classified using cluster analyses and denderogram construction. The results confirmed the importance of the climatic and topographic factors that affect the establishment of the plant communities. Plant habitats in the region are mosaics and cause ecoton formations, so diversities in species combinations increase. The species diversity of the communities was measured using the Shannon coefficient; it varied from 2.26 to 0.39. According to cluster analyses, there are 15 different plant communities, but when the second dominant species were considered, some communities were further divided into sub-communities.

scholarly journals PENGARUH PENGGUNAAN GADGET DENGAN PRESTASI BELAJAR PADA SISWA/SISWI SMAN 2 TEMBILAHAN

2019 ◽  
Vol 5 (3) ◽  
pp. 157
Author(s):  
Haryati Astuti
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Adverse Impact ◽  
The Internet ◽  
Stratified Random Sampling ◽  
Cross Sectional ◽  
Learning Achievement ◽  
Additional Information ◽  
The World ◽  
The Impact

Gadget are phones that have capabilities such as computers, usually have large screens and the operating system is capable of carrying out common applications. Throughout the world there are 76.9 billion gadget usage and will continue to increase. The impact of the use of gadget can have an adverse impact on adolescents, it is known that the mass media or in this case the internet has a big impact on behavior change, such as playing games, watching porn videos and having unlimited relationships with girlfriends. The purpose of this study was to find out the description of the use of gadgets with the learning achievement of students of SMAN 2 Tembilahan in 2018. This research is descriptive with a cross sectional approach. The population in this study were all students of class XI and XII, with the sampling method carried out in proportionate stratified random sampling, as many as 117 samples, carried out on 28 Agustus 2018. The results of this study that use the majority of gadgets have a majority of unfavorable learning achievement as many as 41 people (56.2%) and the negative using the majority gadget also has a bad learning achievement of 52 people (71.2%). It is hoped that this research will be used as a reference for schools on the impact of gadget use, so that this research can later be used by students to improve learning achievement, and can provide additional information for further researchers by replacing or adding existing variables related to the description of gadget usage, learning in adolescents.

scholarly journals Changes in plant composition and diversity in an Alpine heath and meadow after 18 years of experimental warming

2020 ◽  
Author(s):  
Juha Alatalo ◽  
Mohammad Bagher Erfanian ◽  
Ulf Molau ◽  
Shengbin Chen ◽  
Yang Bai ◽  
...  
Keyword(s):  
Species Composition ◽  
Plant Communities ◽  
Phylogenetic Diversity ◽  
Dominant Species ◽  
Experimental Warming ◽  
Alpine Plant ◽  
Arctic Ecosystems ◽  
Alpine Plant Communities ◽  
The Impact

Background and aim Global warming is expected to have large impacts on high alpine and Arctic ecosystems in future. Here we report the effects of 18 years of experimental warming on two contrasting high alpine plant communities in subarctic Sweden.Methods Using open-top chambers (OTCs), we analysed the effects of long-term passive experimental warming on two high alpine plant communities, a species- and nutrient-poor heath and a more nutrient- and species-rich mesic meadow. We determined the impact on species composition, species diversity (at the level of rare, frequent and dominant species in each community), and phylogenetic and functional diversity.Key results Long-term warming drove differentiation in the species composition in both heath and meadow vegetation, with the warmed plots having distinctly different species composition in 2013 compared with 1995. In addition, variability in species composition increased in the meadow, while it decreased in the heath. The long-term warming had a significant negative effect on the three orders of phylogenetic Hill diversity in the meadow. There was a similar tendency in the heath, but only the phylogenetic diversity of dominant species was significantly affected. Long-term warming caused a reduction in graminoids in the heath, while deciduous shrubs increased. In the meadow, cushion-forming plants showed an increase in abundance from 2001 to 2013 in the warmed plots. Conclusions Responses in species and phylogenetic diversity to experimental warming varied over both time (medium vs long-term responses) and space (i.e. between the two neighbouring plant communities heath and meadow). The meadow community was more negatively affected in terms of species and phylogenetic diversity than the heath community. A potential driver for the changes in the meadow may be decreased soil moisture caused by the long-term warming.

scholarly journals Distribusi dan Kemelimpahan Spesies Tumbuhan Bawah pada Naungan Pinus mercusii,Acacia auriculiformis danEucalyptus alba di Hutan Gama Giri Mandiri, Yogyakarta

2015 ◽  
Vol 16 (1) ◽  
pp. 33
Author(s):  
Maizer Said Nahdi ◽  
Darsikin Darsikin
Keyword(s):  
Environmental Factors ◽  
Random Sampling ◽  
Dominant Species ◽  
Sampling Method ◽  
Diversity Index ◽  
Acacia Auriculiformis ◽  
Stratified Random Sampling ◽  
Plot Size ◽  
Factors Influencing ◽  
Light Density

The purpose of this research was to study distribution and abundance of (shrubs, herbs, and rumput) under the three stands,i.e. Pinus mercusii, Acacia auriculiformis and Eucalyptus alba and environmental factors influencing them in Gama Girimandiri Forest. Data were collected in April-May 2011, using square plots. Plots were located in three locations by followinga stratified random sampling method. We administered 10 repetitions, and plot size 5x5 m for shrubs and herbs, and 1X1 m forgrass. The species found in each stand were identified and calculated for their density, frequency, domination, importantvalue, diversity index, and those parameters’ correlation with the measured environmental factors. The study shows that 59species of herbs and shrubs, and 12 species of grass. In the three stands, it could be shown various domination of grass,meanwhile there is no dominant species at the level of herbs and shrubs. The highest density, measured by diversity index,was observed at the stand of Pinus (3,13), followed by Acacia (3,12) and Eucalyptus (2,8). The distribution and density ofMemecylon sp and Oplismenus burmanni were observed at their highest value under the stand of Pinus, Lantana camaraLinn (37.2). At the same fashion, Paspalum conjugatum (58.3) does under the stand of Acacia, and Desmodium triflorum(64,2) and Ischaemum magnum (122) under Eucalyptus. Lantana camara could always be found under the three stands, ithad high important value, categorized as strategy species and invasive. Light density and pH significantly influenced thediversity index of shrubs and herbs. In addition, only soil temperature gave an effect to grass.

scholarly journals DAMPAK KEANGGOTAAN KELOMPOK LUMBUNG PANGAN MASYARAKAT TERHADAP PENDAPATAN USAHATANI PADI DI KABUPATEN TAKALAR

Agric ◽  
2017 ◽  
Vol 29 (1) ◽  
pp. 69
Author(s):  
Muh Tahir ◽  
Sri Murdiyati ◽  
Sitti Arwati
Keyword(s):  
Data Analysis ◽  
Random Sampling ◽  
Sampling Method ◽  
Simple Random Sampling ◽  
Total Sample ◽  
T Test ◽  
Land Area ◽  
Income Levels ◽  
South Sulawesi ◽  
The Impact

<span class="fontstyle0">This study aims to analyze the income of paddy farming in members and non-members of the community granary group, and to know the impact of the membership of the granary group on the income of paddy farming. This research was conducted in Bontoloe Village, Galesong Sub District, Takalar District, South Sulawesi Province. Sampling was done by two methods, first for sample of granary member using purposive sampling method, second fornon-member of granary using simple random sampling method. So the total sample in this study were 34 farmers. Data analysis used is the analysis of different test (t test) and multiple linear regression. The results showed that the income earned by farmer members of the granary group amounted to Rp 9,386,227.00, while the income earned by non-member farmers in the granary group was Rp 9,175,144.00. Differences in paddy production, revenue, and income levels between member farmers and non-members of the granary group based on t test proved not significantly different. Factors that significantly affect the income level of paddy farming are land area, paddy seed price, pesticide price, and labor wage. While the impact of membership of community granary group was not significant to the income of paddy farming. But simultaneously (land area, price of paddy seed, price of urea fertilizer, phonska fertilizer price, pesticide price, labor wage, dummy member) can affect paddy farming income of 84.99%.</span>

scholarly journals Pengaruh Shift Kerja, Stres Kerja Dan Lingkungan Kerja Terhadap Kinerja Karyawan Di PT. Liku Telaga Gresik

2020 ◽  
Vol 16 (1) ◽  
pp. 208-230
Author(s):  
Yani Elviani Lestari ◽  
Moh. Bukhori ◽  
Fathorrahman
Keyword(s):  
Work Environment ◽  
Human Resource ◽  
Stress Level ◽  
Random Sampling ◽  
Sampling Method ◽  
Employee Performance ◽  
Organizational Goals ◽  
Spss Software ◽  
Permanent Employees ◽  
The Impact

In determining and achieving a goal in a organization, one element that’s needed is human resource. In facing challenges to achieve organizational goals, continues improvement is needed to improve and enhance employee performance. The goals of this research is : 1. To know and analyze the impact of shift system to employee’s performance, 2. To know and analyze the impact of employee’s stress level to employee’s performance, 3. To know and analyze the impact of work environment to employee’s performance, 4. To know and analyze the impact of shift system, employee’s stress level, and work environment simultaneously to employee’s performance. This research is associative casual research using quantitative approach. This research was conducted on PT Liku Telaga’s employees. The population of this research is all permanent employees of PT Liku Telaga. Samples were taken using proportional random sampling method from 68 respondents. Those data were processed using SPSS software ver.20. The result of this research shows that 1. Shift system doesn’t affect significantly and affect positively to employee’s performance 2. Employee’s stress level affect significantly and affect negatively to employee’s performance 3. Work environment affect significantly and affect positively to employee’s performance 4. Shift system, employee’s stress level and work environment affect significantly to PT Liku Telaga employee’s performance.

scholarly journals THE IMPACT OF SOCIO-EMOTIONAL INTELLIGENCE ON ACADEMIC PERFORMANCE

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Jamshid Ali Turi ◽  
Muhammad Faizal A. Ghani ◽  
Yasir Javid ◽  
Shaharyar Sorooshian
Keyword(s):  
Emotional Intelligence ◽  
Academic Performance ◽  
Random Sampling ◽  
Sampling Method ◽  
Target Population ◽  
Survey Method ◽  
Teaching Learning ◽  
The University ◽  
The Impact ◽  
Self Administered Questionnaire

The study was designed to check the impact of socio-emotional intelligence on academic performance of the university students. The target population was BS, MS and PhD students of the COMSATS institute for information technology. Self-administered questionnaire based survey method was adopted using Bar On EQ-I questionnaire for data collection based on non-random sampling (Convenient) sampling method. Results indicate positive correlation between socio-emotional intelligence and academic performance and the results recommend penetration of socio-emotional intelligence practices in teaching learning processes for getting best possible academics objectives.

أثر دور الحوافز المادية والمعنوية في تحسين أداء العاملين في شركة الكهرباء- محافظات غزة

2016 ◽  
Vol 3 (1) ◽  
pp. 106-135
Keyword(s):  
Significant Relationship ◽  
Analytical Method ◽  
Random Sampling ◽  
Sampling Method ◽  
Electricity Distribution ◽  
Distribution Company ◽  
Study Population ◽  
Job Title ◽  
And Performance ◽  
The Impact

ملخص: هدفت الدراسة إلى التعرف على دور الحوافز المادية والمعنوية في تحسين أداء العاملين في شركة الكهرباء -محافظات غزة. وقد استخدم الباحثون المنهج الوصفي التحليلي؛ لمناسبة هذا المنهج لمثل هذا النوع من الدراسات. وقد تكون مجتمع الدراسة من العاملين في شركة توزيع الكهرباء- محافظات غزة. وقد قام الباحثون باستخدام طريقة العينة العشوائية ، حيث تم توزيع (150) استبانة على عينة الدراسة وقد تم استرداد ((144 استبانة بنسبة استرداد (96%). وقد توصلت الدراسة إلى النتائج الآتية : وجود علاقة ذات دلالة إحصائية عند مستوى دلالة (0.05 ≤ α) بين الحوافز المادية وأداء العاملين في شركة توزيع الكهرباء – محافظات غزة. وجود علاقة ذات دلالة إحصائية عند مستوى دلالة (0.05 ≤ α) بين الحوافز المعنوية وأداء العاملين في شركة توزيع الكهرباء – محافظات غزة. وجود علاقة ذات دلالة إحصائية عند مستوى دلالة (0.05 ≤ α) بين الإنصاف في الحوافز المادية والمعنوية وأداء العاملين في شركة توزيع الكهرباء محافظات غزة. لا توجد فروق ذات دلالة احصائية عند مستوى (0.05 ≤ α) بين الحوافز وأداء العاملين في شركة توزيع الكهرباء محافظات غزة تعزى للمتغيرات التالية (العمر، المؤهل العلمي ، المسمى الوظيفي). بينما يوجد فروق تعزى لسنوات الخبرة.توصلت الدراسة إلى مجموعة توصيات أهمها: ضرورة أن تهتم الشركة بزيادة المكافآت المادية لتحسين المردود الأدنى للعاملين فيها. تشجيع العاملين في حال تحقيق الأهداف المطلوبة وذلك بمنحهم العمولات على ذلك. العمل على تقديم مزايا معنوية إضافية للعاملين لتحفيزهم على العمل. الاهتمام بتنمية روح التقدير والاحترام بين العاملين لتحفيزهم على العمل. ضرورة السعي لتحقيق الإنصاف في منح الحوافز المعنوية والمادية للعاملين. ضرورة اتباع نظام حوافز وترقيات عادل من خلال التدرج الوظيفي. Abstract The study aimed to identify The impact of material and moral incentives on the performance of employees in the provinces of Gaza electricity distribution company . Study Method:The researchers used the descriptive analytical method; the most appropriate approach for the study.The study population: 150employees at Gaza electricity distribution company.The study sample: The researchers used Random Sampling Method, 150 questionnaire papers were distributed of which 144 were retained, which means that the return rate was (96%). Study Findings:The presence of a statistically significant relationship at the level of (0.05 ≤ α) between physical incentives and the performance of employees in the provinces of Gaza electricity distribution company.The presence of a statistically significant relationship at the level of (0.05 ≤ α) between moral incentives and performance of employees in the provinces of Gaza electricity distribution company.The presence of a statistically significant relationship at the level of (0.05 ≤ α) between the equity in physical and moral incentives and the performance of employees in the provinces of Gaza electricity distribution company. No statistically significant differences at the level of (0.05 ≤ α) between incentives and performance of employees in the provinces of Gaza electricity distribution company. That’s because of the following variables (age, educational qualification, job title). While there are differences due to years of experience Recommendations:The need for the company to be interested in increasing material rewards to improve the minimum output of the workers. Encouraging employees when the desired objectives are achieved by giving them commissions on it.Working to provide additional moral advantages for employees to motivate them to work.Paying attention to the development of the spirit of appreciation and respect among employees to motivate them to work. The need to strive to achieve fairness in the granting the moral and physical incentives for employees.The need for a system of incentives and fair promotions through career gradation .

Young Farmers' Motivation and Participation in Horticultural Organic Farming in Yogyakarta, Indonesia

2020 ◽  
Vol 11 (1) ◽  
pp. 45-58
Author(s):  
Sunarru Samsi Hariadi ◽  
Diah Fitria Widhiningsih
Keyword(s):  
Organic Farming ◽  
Agricultural Policy ◽  
Random Sampling ◽  
Sampling Method ◽  
Simple Random Sampling ◽  
Agricultural Extension ◽  
Psychological Characteristics ◽  
The Impact ◽  
Local Leaders

This research aims at analyzing how to further young farmers' motivation and participation and the impact of influencing factors of relevance. Prominent among the goals of this research is to enhance youth psychological characteristics so as to arrange the best strategy to promote horticultural organic farming. Eighty young farmers were selected by means of simple random sampling method. Path analysis was employed to decide the fit model. It was found that agricultural extension workers changed young farmers' motivations and that they had an impact on participation by enhancing perception. The role of agricultural extension workers should be improved; and they should help control the communication between local leaders and farmers. Hopefully, this research can be used as the basis of agricultural policy in developing countries.

scholarly journals Training Set Construction for Genomic Prediction in Auto-Tetraploids: An Example in Potato

2021 ◽  
Vol 12 ◽  
Author(s):  
Stefan Wilson ◽  
Marcos Malosetti ◽  
Chris Maliepaard ◽  
Han A. Mulder ◽  
Richard G. F. Visser ◽  
...  
Keyword(s):  
Genetic Distance ◽  
Genomic Prediction ◽  
Random Sampling ◽  
Sampling Method ◽  
Distance Sampling ◽  
Simple Random Sampling ◽  
Coefficient Of Determination ◽  
Stratified Random Sampling ◽  
Training Set ◽  
The Impact

Training set construction is an important prerequisite to Genomic Prediction (GP), and while this has been studied in diploids, polyploids have not received the same attention. Polyploidy is a common feature in many crop plants, like for example banana and blueberry, but also potato which is the third most important crop in the world in terms of food consumption, after rice and wheat. The aim of this study was to investigate the impact of different training set construction methods using a publicly available diversity panel of tetraploid potatoes. Four methods of training set construction were compared: simple random sampling, stratified random sampling, genetic distance sampling and sampling based on the coefficient of determination (CDmean). For stratified random sampling, population structure analyses were carried out in order to define sub-populations, but since sub-populations accounted for only 16.6% of genetic variation, there were negligible differences between stratified and simple random sampling. For genetic distance sampling, four genetic distance measures were compared and though they performed similarly, Euclidean distance was the most consistent. In the majority of cases the CDmean method was the best sampling method, and compared to simple random sampling gave improvements of 4–14% in cross-validation scenarios, and 2–8% in scenarios with an independent test set, while genetic distance sampling gave improvements of 5.5–10.5% and 0.4–4.5%. No interaction was found between sampling method and the statistical model for the traits analyzed.

scholarly journals IMPACT OF WORKING ENVIRONMENT ON JOB SATISFACTION OF EMPLOYEES

2020 ◽  
pp. 403-406
Author(s):  
Dr.K. Sivagama Shunmuga Sundari ◽  
Ms.A. Antony Selva Priya
Keyword(s):  
Job Satisfaction ◽  
Random Sampling ◽  
Sampling Method ◽  
Structured Interview ◽  
Working Environment ◽  
Primary Data ◽  
Interview Schedule ◽  
Significant Difference ◽  
The Impact

The aim of this paper is to analyse the impact of working environment on job satisfaction of port trusts employees. A well structured interview schedule was used to collect the primary data and proportionate random sampling method was used to select the respondents. The study found that there is a significant difference between the satisfaction of employees of V.O.C. and Chennai port trusts with regard to working environment. KEYWORDS: Working environment, Job satisfaction, Port trusts employees, Interview schedule.

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