ESTIMATION OF EFFICIENCY OF IMPERVIOUS SCREEN AT THE DON MAIN CHANNEL

2017 ◽  
Vol 7 (4) ◽  
pp. 67-72
Author(s):  
Aleksandr V. ISHCHENKO ◽  
Oleg A. BAEV
Keyword(s):  
Main Channel ◽  
Effi Ciency ◽  
Before And After ◽  
Impervious Screen ◽  
Main Canal

The article gives an evaluation of the effi ciency of the Don main canal impervious screen, fi eld observation on the canal section before and after reconstruction are carried out. To estimate the eff ectiveness of the impervious measure, comparative calculations are carried out for the canal section before the reconstruction (in the earthen channel) and after it (with facing from geocomposite bentonite mats), conclusions are drawn and recommendations for channel operation are made.

scholarly journals Forensic investigation of Gumbasa irrigation main canal damage due to large-scale flow liquefaction in Sibalaya caused by the 2018 Sulawesi Earthquake

2021 ◽  
Vol 930 (1) ◽  
pp. 012079
Author(s):  
S Nurdin ◽  
A Arsyad ◽  
F A Marhum ◽  
H Setiawan
Keyword(s):  
Large Scale ◽  
Field Tests ◽  
Standard Penetration Test ◽  
Forensic Investigation ◽  
Flexible Pipe ◽  
Ground Movements ◽  
Before And After ◽  
Future Earthquake ◽  
Main Canal ◽  
Flow Liquefaction

Abstract This study conducted an extensive soil investigation in the Sibalaya liquefaction area to identify the Gumbasa main canal’s damage triggered by flow liquefaction. Several field tests and trenches with approximately 4 m were excavated to observe liquefied soil layers directly near the canal. A borehole, standard penetration test, and multichannel analysis surface waves (MASW) were performed beside the trench to obtain each layer’s penetration resistance. This research aims to understand the landslide’s whole aspect. The ground movements were analyzed by using satellite photos before and after the earthquake. The displacement of the main canal, the typical damage inventory, and the proposed reconstruction of the main canal are the focus of this study. As a result of the forensic investigation, the liquefied layers and debris flow contributing to the massive landslide were identified to impact the primary canal. The typical damage of the canal was due to surface rupture that occurred both horizontally and vertically. A solution for reconstructing the main canal is to use a flexible pipe canal structure. That will be resilient to future earthquake and ground movements, stabilize the ground downslope of the existing canal to limit the risk of future lateral movement in future earth tremors.

scholarly journals Experimental Study of Submerged Vanes in Intakes under Sediment Feeding Conditions

2018 ◽  
Vol 40 ◽  
pp. 03016
Author(s):  
Aslı Bor Türkben
Keyword(s):  
Water Intake ◽  
River Flow ◽  
Flow Direction ◽  
Main Channel ◽  
Bed Topography ◽  
Before And After ◽  
Submerged Vane ◽  
Solid Discharge ◽  
Submerged Vanes ◽  
Intake Structure

Sediment is transported along the river flow and deposited in the mouth of the intake structure over time and reducing the water intake capacity. Nowadays, many water intake structures lose their function and are closed to operation. To deal with this problem, recently, submerged vane application has offered a practical and economical solution. The aim of this study was to evaluate the efficiency of three vane installations under sediment feeding conditions by comparing the bed topography before and after vanes were installed. For that purpose, experiments were carried out in a laboratory channel running for 90-degree intake angle. Three vanes were installed in one column at near the intake entrance. The vanes dimensions were equal to; 3cm height, 12cm long, 10 mm thick, and aligned with α = 20° angle to flow direction. The tests were run until equilibrium was reached, i.e. when the outgoing solid discharge was equal or larger than 90% of the incoming. Once the bed topography remained stable, bed and water level surfaces were measured. tests were carried out by feeding sediment from upstream of the main channel.

Effect of Western the Fourth Phase Project on Hydrodynamic Condition for Shijiu Port in Rizhao

2012 ◽  
Vol 204-208 ◽  
pp. 2369-2373
Author(s):  
Jia Rui Li ◽  
Die Shuang Yu
Keyword(s):  
Channel Flow ◽  
Water Area ◽  
Main Channel ◽  
Hydrodynamic Condition ◽  
Port Area ◽  
Before And After ◽  
Project Construction ◽  
Sheltering Effect ◽  
Sea Area ◽  
Flow Velocities

A hydrodynamic model of Shijiu port and its adjacent sea area was built to discuss the effect of western the fourth phase project on the flow condition for Shijiu port area. The results show that with the sheltering effect of breakwaters, flow velocity values are small inside the breakwaters. The water area near the project is affected more by the project construction. The flow velocities there are faster after the project construction than before it. In the main channel, flow velocities outside the breakwaters almost have no difference before and after the project. The project construction doesn’t have significant effect on it.

scholarly journals Pengembangan sistem informasi berbasis komputer untuk efi siensi penyelenggaraan makanan di Instalasi Gizi RS Militer Malang

2016 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Hasan Aroni ◽  
Hari Kusnanto ◽  
Anis Fuad
Keyword(s):  
Information System ◽  
Science And Technology ◽  
Military Hospital ◽  
Food Stock ◽  
Effi Ciency ◽  
Nutrition Service ◽  
Before And After ◽  
Quasi Experimental ◽  
Computer Based ◽  
Food Provision

ABSTRACT<br /><br />Background: The rapid development of science and technology in the globalization era, particularly information technology enables data or information to be processed quickly and accurately. Nutrition service in the form of food provision in hospitals requires precision and accuracy  as well as speed in its process. Therefore the utilization of science and technology especially computer-based information system will be of much help. Nutrition installation of Malang Military Hospital still uses manual method in calculating the need for food stock so that it needs more time and nutrition staff to do the work.   <br /> <br />Method: The study was a quasi experimental study (before and after) without control group to fi nd out the difference in duration of food stock need calculation before and after the implementation of computer-based information system in the food provision at Nutrition Installation of Malang Military Hospital.<br /><br />Result: The implementation of computer-based information system at nutrition installation improved nutrition staff and time effi ciency in the calculation of food stock needs. Only one nutrition staff was needed to operate computer, whereas in the manual calculation method two nutrition staff were needed to do the work. The time needed to calculate food stock before the implementation of computer-based information system in average was 3.5 hours and after the implementation was 1.6 hours, based on statistical test at signifi cance level 95% p&lt;α(0.05) whereby 0.003&lt;0.05. This meant there was difference in duration of time needed before and after the implementation of computer-based information system in food provision at Nutrition Installation of Malang Military Hospital.<br /><br />Conclusion: The development of computer-based information system improved nutrition staff and time effi ciency in the calculation of food stock need in food provision at Nutrition Installation of Malang Military Hospital.<br /><br />KEYWORDS: information system, effi ciency, food stock calculation, nutrition installation, food provision<br /><br />ABSTRAK<br /><br />Latar Belakang: Perkembangan iptek pada era globalisasi yang begitu pesat, terutama teknologi informasi akan memungkinkan proses data atau informasi dengan cepat dan akurat. Pelayanan gizi, dalam hal penyelenggaraan makanan rumah sakit dalam prosesnya memerlukan ketelitian dan ketepatan serta kecepatan waktu yang digunakan. Untuk itu, pemanfaatan ilmu pengetahuan dan teknolgi dalam hal ini sistem informasi berbasis komputer akan sangat membantu. Instalasi Gizi Rumah Sakit Militer Malang (RSMM), dalam kegiatan perhitungan kebutuhan bahan makanan masih menggunakan penghitungan secara manual sehingga memerlukan waktu dan tenaga kerja gizi yang lebih untuk menyelesaikannya.<br /><br />Tujuan: Mengembangkan sistem informasi berbasis komputer untuk meningkatkan efi siensi waktu dan tenaga kerja gizi dalam perhitungan kebutuhan bahan makanan pada penyelenggaraan makanan di Instalasi Gizi RSMM.<br /><br />Metode: Penelitian ini merupakan penelitian quasi experimental (before-after) tanpa kelompok kontrol untuk mengetahui perbedaan durasi waktu yang digunakan dalam perhitungan kebutuhan bahan makanan sebelum dan sesudah menerapkan sistem informasi berbasis komputer pada penyelenggaraan makanan di Instalasi Gizi RSMM.<br /><br />Hasil: Penelitian ini menunjukkan bahwa dengan penerapan sistem informasi berbasis komputer pada instalasi gizi akan meningkatkan efi siensi tenaga kerja gizi dan waktu dalam perhitungan kebutuhan bahan makanan. Satu tenaga kerja gizi cukup digunakan untuk operasional computer yangsebelumnya 2 tenaga kerja gizi untuk perhitungan secara manual. Waktu yang diperlukan untuk perhitungan bahan makanan sebelum dan sesudah menerapkan sistem informasi berbasis komputer berbeda nyata dengan rata-rata adalah 3,5 jam dan 1,6 jam(p&lt;0,05).<br /><br />Kesimpulan: Pengembangan sistem informasi berbasis komputer akan meningkatkan efi siensi tenaga kerja gizi dan waktu dalam perhitungan kebutuhan bahan makanan pada penyelenggaraan makanan di Instalasi Gizi RSMM.<br /><br />KATA KUNCI: sistem Informasi, komputer, efi siensi tenaga kerja gizi dan waktu, perhitungan kebutuhan bahan makanan

Decapod community structure in a subtropical mountain stream in Taiwan before and after a catastrophic typhoon

Crustaceana ◽  
2014 ◽  
Vol 87 (11-12) ◽  
pp. 1281-1295
Author(s):  
Kwee Siong Tew ◽  
Chiao-Chuan Han ◽  
David C. Glover ◽  
Yu-Kang Chen
Keyword(s):  
Community Structure ◽  
Extreme Events ◽  
Diversity Index ◽  
Aquatic Organisms ◽  
Main Channel ◽  
Mountain Stream ◽  
Acute Effects ◽  
Subtropical Area ◽  
Physical Conditions ◽  
Before And After

Extreme events (typhoons, floods, and mudflows) can influence the abundance and community structure of aquatic organisms. In this study, we compare freshwater decapod abundance and community structure in main channel and tributary sites in a subtropical area of Taiwan before and after the typhoon Tembin. The results indicate that the physical conditions, decapod abundance and the Shannon diversity index were significantly different between the main channel and tributary sites, but were not significantly affected by the typhoon. The decapod community structure also showed significant differences spatially, but not temporally. The results of this study suggest that decapod communities are highly resilient to the acute effects of typhoons.

scholarly journals PERENCANAAN REHABILITASI SALURAN INDUK DAERAH IRIGASI CIBINUANGEUN DI KABUPATEN LEBAK PROVINSI BANTEN

2021 ◽  
Vol 3 (1) ◽  
pp. 1-6
Author(s):  
Restu Candra ◽  
Rino Dwi Sadi ◽  
Ma'ulfi Kharis Abadi
Keyword(s):  
Agricultural Land ◽  
Water Source ◽  
Main Channel ◽  
Public Works ◽  
Water Drainage ◽  
Irrigation Planning ◽  
Irrigation Area ◽  
Directorate General ◽  
Main Canal ◽  
The Cost

Irrigation is an effort to provide and regulate water for agricultural land. The main objective of this study is to plan the rehabilitation of the main channel of Cibinuangeun irrigation area, Lebak Regency, Banten Province. The main channel serves to carry water from the main network to the secondary channel and tertiary plot. The material can be made of masonry, concrete or masonry and concrete. The Cibinuangeun main channel relies on a water source from the Cibinuangeun river through the Cibinuangeun weir building. The Cibinuangeun Irrigation Area has a functional area 2570 ha. The condition of the Cibinuangeun main canal currently has a lot of damage, which results in water drainage being not optimal so it is necessary to plan for rehabilitation by directly examining the condition of the canals at the location to determine the volume of damage and calculate the cost of rehabilitation on the channel. The research method used is the Irrigation Planning Criteria issued by the Ministry of Public Works, Directorate General of Water Resources as the basis for standard irrigation planning. The results showed that the trapezoidal trunk channel and the current available flow rate were not in accordance with the initial planning of the Cibinuangeun main channel construction, due to sedimentation and damage to the walls and floor of the leaking channel. The level of damage to the main line reached 47,37% of a total trunk length of 950 meters. The planned cost required for the rehabilitation of the Cibinuangeun main channel is four hundred seventy million four hundred thousand rupiah.

scholarly journals Efficacy of a Nickel-Titanium Ultrasonic Instrument for Biofilm Removal in a Simulated Complex Root Canal

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4914
Author(s):  
Young-Ryul Oh ◽  
Hye-Min Ku ◽  
Dohyun Kim ◽  
Su-Jung Shin ◽  
Il-Young Jung
Keyword(s):  
Stainless Steel ◽  
Enterococcus Faecalis ◽  
Root Canal ◽  
Nickel Titanium ◽  
Complex Root ◽  
Root Canals ◽  
Biofilm Removal ◽  
Working Length ◽  
Before And After ◽  
Main Canal

This study evaluated the effectiveness of NiTi ultrasonic tips for Enterococcus faecalis (E. faecalis) biofilm removal in simulated complex root canals. Sixty root canal models consisting of a 30-degree curved main canal and two lateral canals were constructed from polydimethylsiloxane and incubated with E. faecalis. Irrigants in root canals were activated using a manual syringe (SI), a stainless steel (SS) instrument, a nickel-titanium (Ni-Ti) ultrasonic instrument, or a sonic instrument (EA). Instruments of SI, SS, and NiTi-9 groups were placed 9 mm from the apex, whereas those in NiTi-2 and EA groups were placed 2 mm from the apex. The efficacy of each method was determined as the ratio of fluorescence concentration before and after activation. In the apical curved canal, the highest efficacy was found in the NiTi-2 group (99.40%), followed by SI (84.25%), EA (80.38%), SS (76.93%), and NiTi-9 (67.29%) groups. In lateral canals 1 and 2, the efficacy was the highest in the NiTi-2 group and the lowest in the SI group. The NiTi ultrasonic instrument could effectively remove biofilms in the curved canal and lateral canals. This instrument should be introduced close to the working length. An up-and-down motion of the activation instrument is recommended.

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

The Clinical, Roentgenological and Morphological Effects of an Acute Exposure of Phosgene on the Lungs of Dogs

1971 ◽  
Vol 29 ◽  
pp. 236-237
Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth
Keyword(s):  
Latent Period ◽  
Chemical Industry ◽  
Toxic Substance ◽  
Lung Edema ◽  
X Rays ◽  
Beagle Dogs ◽  
Male And Female ◽  
Morphological Alterations ◽  
Before And After ◽  
Electron Microscopes

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.

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