scholarly journals Water Hammer Modelling and Simulation by GIS

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
K. Hariri Asli ◽  
A. K. Haghi ◽  
H. Hariri Asli ◽  
E. Sabermaash Eshghi
Keyword(s):  
Computational Model ◽  
Water Hammer ◽  
Laboratory Model ◽  
Test Results ◽  
Geography Information System ◽  
Transmission Pipeline ◽  
Water Transmission ◽  
Geography Information ◽  
The Relationship ◽  
Unaccounted For Water

This work defined an Eulerian-based computational model compared with regression of the relationship between the dependent and independent variables for water hammer surge wave in transmission pipeline. The work also mentioned control of Unaccounted-for-Water (UFW) based on the Geography Information System (GIS) for water transmission pipeline. The experimental results of laboratory model and the field test results showed the validity of prediction achieved by computational model.

scholarly journals PELATIHAN SISTEM INFROMASI GEOGRAFI KEPADA GURU SMA/MA SE-EKS KARESIDENAN SURAKARTA

Warta LPM ◽  
2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohammad Amin Sunarhadi ◽  
Dilahur Dilahur ◽  
Priyono Priyono
Keyword(s):  
Information System ◽  
High Schools ◽  
Physical Nature ◽  
Cognitive Domain ◽  
Cognitive Level ◽  
Geography Information System ◽  
The Earth ◽  
Implementation Level ◽  
Geography Information ◽  
The Relationship

The training aims at improving the capability of the trainingparticipants – teachers – for teaching Geography Information System by(1) giving information and introduction about the process in implementingSIG for the teachers of senior high schools (SMA/MA). (2) Demonstratinghow to operate the technology of geography information system and (3)socializing the existence and technological implementation system ofSIG. the methods used are speech, discussion, peer teaching and practice.The place to practice it is in the laboratory of Geography faculty of UMS.The participants are allowed to operate hardware and software of SIG.The result of pretest by using questioner and brainstorming shows thatmost of the participants master SIG in cognitive domain in comprehensionlevel for the theory of SIG, while for its operation; they are in perceptionlevel of psychomotor domain. At the end of the training, the participantsshow that there is the change of comprehension about the theory of SIGfrom cognitive level to implementation level, whereas in the operation ofSIG, the change is from perception level to implementation with guidance.The result of training is supplemented by the response of the participantswhich is appropriate to the target score. The response of the task ofidentification is the use of map and SIG in teaching Geography whichfinds that teaching Geography in senior high schools (SMA/MA) isdirected to 3 targets: 1. analyzing the impulse of physical nature and thedevelopment of the shape of the earth and its reservation. 2. Evaluatingsocial impulse in the earth and its interaction as well as its effect to ourlife and 3. Using the concept of region and graphic in understandinglocation, design, distribution and the relationship among the objectsinvolved the specification for industry.

Problematic Internet Use digunakan Ketika Kesepian pada Remaja

2020 ◽  
Vol 14 (1) ◽  
pp. 45-60
Author(s):  
Yashinta Yashinta ◽  
Dwi Hurriyati
Keyword(s):  
Internet Use ◽  
Hypothesis Test ◽  
Problematic Internet Use ◽  
Coefficient Of Determination ◽  
Test Results ◽  
Research Subjects ◽  
Significance Level ◽  
Relationship Of ◽  
The Relationship ◽  
Effective Contribution

This study aims to determine the relationship of loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city. Research subjects numbered 220 people using random sampling methods. Data was collected using a 60 item problematic internet use scale and a 60 item loneliness. Realibility is generated on scale of problematic internet use of 0,955 and loneliness of 0,946.Hypothesis testing uses product moment correlation analysis techniques. Hypothesis test results showed a positive relationshif between loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city r= 0,684 with a significance level of 0,000 (p<0,01). Loneliness in this study made an effective contribution of 46,8% to problematic internet use which can be seen from the coefficient of determination (r²) that is equel to 0,468.

PEMODELAN PENENTUAN KAWASAN SAWAH BERKELANJUTAN Studi Kasus Kabupaten Semarang

2019 ◽  
Vol 3 ◽  
pp. 227
Author(s):  
Ahmad Yazidun Nafi ◽  
Yudi Basuki
Keyword(s):  
Information System ◽  
Land Rent ◽  
Geography Information System ◽  
Geography Information

Alih fungsi lahan pertanian ke non pertanian menjadi permasalahan di kawasan pinggiran perkotaan. Alih fungsi lahan ini disebabkan land rent lahan pertanian tidak menguntungkan dibandingkan jika dibandingkan dengan lahan komersil. Jika kondisi ini terus berlanjut maka akan mengancam ketahanan pangan suatu wilayah. Penelitian ini bertujuan untuk memodelkan penentuan lahan sawah berkelanjutan berdasarkan analisis spasial dan teknik penginderaan jauh. Analisis yang digunakan meliputi analisis interpretasi citra, Geography Information System (GIS), analisis statistik, dan analisis prediksi ketersediaan lahan sawah. Penelitian ini dilakukan di Kabupaten Semarang dengan perkembangan perkotaan yang cepat. Variabel dalam menyusun model lahan sawah berkelanjutan ini terdiri dari variabel produktivitas tanaman, kepadatan dan jangkauan jaringan jalan dan sungai, kawasan lindung, serta proyeksi arah perkembangan perkotaan. Hasil analisis produktivitas tanaman menghasilkan persamaan statistik produktivitas (ton/ha) = 3,795 (NDVI) + 3,774 dan nilai r² sebesar 0,854. Terdapat selisih antara data dinas dengan data peneliti sebesar 2,8% dari luas lahan pertanian eksisiting. Selisish luas ini dikarenakan perbedaan skala peta, proses analisis, dan metode yang digunakan. Berdasarkan hasil analisis dan pembahasan maka dapat disimpulkan bahwa lahan sawah berkelanjutan ketersediannya mulai berkurang, sehingga perlu adanya ketegasan pemerintah daerah dalam menjaga ketersedian lahan sawah.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

Adolescent smoking behavior and communication with parents: Depression as a mediator and gender as a moderator

2019 ◽  
Vol 47 (10) ◽  
pp. 1-9 ◽  
Author(s):  
Xieping Chen ◽  
Qian Xie ◽  
Yuting Yang
Keyword(s):  
Smoking Behavior ◽  
Depression Scale ◽  
Epidemiological Studies ◽  
Adolescent Smoking ◽  
Junior High Schools ◽  
Test Results ◽  
Negative Effect ◽  
And Gender ◽  
The Relationship ◽  
Communication Scale

Parent–adolescent communication is assumed to be an important factor affecting adolescent smoking behavior. However, the inner mechanism accounting for this association has still not been clarified in research. Our purpose in this study was to examine the relationships between parent–adolescent communication, adolescent smoking behavior, and depression, as well as gender differences in the relationship between depression and adolescent smoking behavior. Participants were 1,134 students at 6 junior high schools in China who completed the Parent-Adolescent Communication Scale, the Epidemiological Studies Depression Scale, and the Smoking Behavior Test. Results showed that parent-adolescent communication had a significant negative effect on adolescent smoking behavior and depression partially mediated the relationship between parent–adolescent communication and adolescent smoking behavior. In addition, gender moderated the relationship between depression and adolescent smoking behavior. Overall, these findings may help to promote better understanding of the relationship between parent–adolescent communication and adolescent smoking behavior.

A Study on Estimation of Internal Pressure Creep Life Using Small Punch Creep (SPC) Tests for Boiler Pipes

2009 ◽  
Author(s):  
Toshimi Kobayashi ◽  
Toru Izaki ◽  
Junichi Kusumoto ◽  
Akihiro Kanaya
Keyword(s):  
Internal Pressure ◽  
Residual Life ◽  
Test Results ◽  
Creep Life ◽  
Creep Tests ◽  
Good Correspondence ◽  
Small Punch ◽  
Uniaxial Creep ◽  
Wide Range ◽  
The Relationship

The small punch creep (SPC) test is possible to predict residual creep life at a high accuracy. But, the results of SPC tests cannot be compared with uniaxial creep or internal pressure creep results directly. In this report, the relationship between SPC test results and uniaxial creep test results in ASME A335 P11 (1.25Cr-0.5Mo Steel) was studied. The obtained relationship between SPC load and equivalent uniaxial creep stress formed a simple linear equation under the wide range of test temperature and test period. Then, the SPC results can be compared with uniaxial results by converting SPC loads to the equivalent uniaxial creep stresses. The relationship between SPC test results and internal pressure creep tests results was also studied. The internal creep life of as-received P11 pipe was almost same as SPC result when the hoop stress was converted to the SPC load. The creep lives of internal pressure creep influenced materials also showed good correspondence with SPC results. Therefore SPC can estimate the residual life of internal pressure creep influenced materials.

Size Effect on Mechanical Properties of LVL

2014 ◽  
Vol 887-888 ◽  
pp. 824-829
Author(s):  
Qing Fang Lv ◽  
Ji Hong Qin ◽  
Ran Zhu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Size Effect ◽  
Tensile Test ◽  
Compression Test ◽  
Test Results ◽  
Laminated Veneer Lumber ◽  
Object Of Study ◽  
The Relationship

Laminated veneer lumber is taken as an object of study, and use LVL specimens of different sizes for compression test and tensile test. The goal of the experiment is to investigate the size effect on compressive strength and tensile strength as well as the influence of the secondary glued laminated face, which appears in the secondary molding processes. The results show that both compressive strength and tensile strength have the size effect apparently and the existence of the secondary glued laminated face lower the compressive strength of LVL specimens. Afterwards, the relationship between compressive strength and volume along with tensile strength and area are obtained by the test results.

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