scholarly journals Detailed Research on the Turbulent Kinetic Energy’s Distribution in Fishways in Reference to the Bolt Fishway

Fluids ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 64 ◽  
Author(s):  
Marta Puzdrowska ◽  
Tomasz Heese
Keyword(s):  
Spatial Distribution ◽  
Kinetic Energy ◽  
Flow Velocity ◽  
Laboratory Tests ◽  
Structural Features ◽  
Main Flow ◽  
Intensity Scale ◽  
Characteristic Features ◽  
Low Efficiency

Turbulent kinetic energy (TKE) and its distribution and volume remain—with the exception of flow velocity—the most important cause of the low efficiency of fish passes. Thus, it is important to define the reasons and mechanisms that explain the distribution of characteristic features of this parameter, as presented in the paper. This publication presents the spatial distribution of TKE for two models of bolt-type fishways. The paper shows details related to characteristic features of TKE distribution and intensity scale in a bolt fishway. The presented research results for the bolt fishway were obtained from laboratory tests using a physical model. Measurements were taken of three temporary components of flow velocity in the indicated measurement sections. It was established that differences in the TKE volume and distribution are a consequence of the state of the stream that leaves the slot’s section or the orifice’s section. This state is defined by the determination of the stream’s potential. A low potential results in high TKE values in the area of the main flow. Thus, considering various structural features of fish passes, one can assert that the potential remains a characteristic feature attributable to a particular type of facility.

scholarly journals Molecular detection of Chlamydia psittaci and Chlamydia felis in human keratoconjunctivitis cases

2020 ◽  
Vol 23 (1) ◽  
pp. 130-137
Author(s):  
S. Jazi ◽  
A. Mokhtari ◽  
A. Ebrahimi Kahrizsangi
Keyword(s):  
Veterinary Medicine ◽  
Significant Relationship ◽  
Laboratory Tests ◽  
Molecular Detection ◽  
Chlamydia Psittaci ◽  
Diagnostic Measures ◽  
High Incidence ◽  
Low Efficiency ◽  
Low Rate

Given the high incidence of keratoconjunctivitis in Iran (approximately 3.6–53.9%) and low efficiency of clinical diagnostic measures, application of laboratory tests for detection of different keratoconjunctivitis/conjunctivitis causes and determination of their accurate prevalence is essential. In this research, conjunctival samples were collected from 100 patients with keratoconjunctivitis signs referred to an eye hospital of Iran. After DNA extraction, PCR was carried out for detection of Chlamydia psittaci and Chlamydia felis. PCR positive products were further subjected for DNA sequencing. In this study, one sample was Chlamydia psittaci positive and none was positive for Chlamydia felis. There wasn’t a statistically significant relationship between working in the field of veterinary medicine or keeping a pet and Chlamydia psittaci prevalence (P>0.05). This study showed a low rate of chlamydial keratoconjunctivitis and therefore further studies for detection of other causes are necessary.

scholarly journals Turbulent Kinetic Energy in Bolt Fishway

2019 ◽  
Vol 1 (2) ◽  
pp. 265-282
Author(s):  
Marta Puzdrowska ◽  
Tomasz Heese
Keyword(s):  
Spatial Distribution ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Laboratory Tests ◽  
Flow Structures ◽  
3D Flow ◽  
Velocity Magnitude ◽  
Biological Development ◽  
The Impact ◽  
Channel Development

The paper presents an analysis the spatial distribution of turbulent kinetic energy (TKE) for bolt fishways, including the impact of additional spillway slots and fixed channel development. The research was done for two models, each containing a different arrangement of slots. The presented results of research for bolt fishways were obtained as an effect of laboratory tests. The measurements were done for three components of instant flow velocity magnitude (speed). Analysis of the results was done for a 3D flow structure using Matlab software. In the case of bolt fishways, significant differences were noted for the method of velocity and TKE distribution, in reference to research comprising channels with biological development. It was stated that a reason for this is the flexible development of the channel. The occurrence of extreme TKE values in the chamber (pool) is strictly associated with the characteristics of interaction zones between various flow structures. It was also stated that the lower the parapet of the slot’s spillway shelf is in the fishway’s partition, the higher TKE could be expected just downstream of the section. These establishments may be important for the designing process in the case of fish passes of various types of construction.

2D PIV Experiments on Non-Uniform Flow in a Rectangular Open Model Pump Suction Passage

2005 ◽  
Author(s):  
Zhaofeng Xu ◽  
Fan Yi ◽  
Shuhong Liu ◽  
Yulin Wu
Keyword(s):  
Kinetic Energy ◽  
Flow Velocity ◽  
Flow Patterns ◽  
Flow Ratio ◽  
Flow Conditions ◽  
Total Flow ◽  
Operation Condition ◽  
Open Model ◽  
Piv Method ◽  
Low Efficiency

Flows in the suction passage are important for pump working, which can influent the flow conditions in the pump. Some bad flow patterns in the suction passage may do damages to the pump, inducing cavitation, vibration, low efficiency and so on. Flow patterns of non-uniform flows in a rectangular open suction passage, such as distribution of velocity, streamline, turbulence kinetic energy and vortex, were studied by a 2D PIV method under different conditions. The results show that the non-uniformity of flow increases and the flow pattern gets deteriorate when the flow ratio of the two sub-passages rises or the total flow velocity increases. So the best operation condition can be chosen to avoid non-uniformity in the open pump suction passage.

DETERMINATION OF THE TYPE OF A SINGLE-USE GRENADE LAUNCHER BASED ON ITS COMPOSITE PARTS AND FRAGMENTS OF REACTIVE GRENADE FOUND AT THE PLACE OF ACCIDENT

2017 ◽  
Vol 17 ◽  
pp. 245-252
Author(s):  
V. V. Somov
Keyword(s):  
Combustion Chamber ◽  
Structural Features ◽  
Outlet Section ◽  
Technical Expertise ◽  
Jet Engine ◽  
Size Ofthe ◽  
Single Use ◽  
Nozzle Block ◽  
Considerable Damage

In carrying out an investigation into the explosion, among others, the investigative version of the use of a single-use reactive grenade launcher is being considered. The most common for criminal explosions are applied grenade launchers RPG-18, RPG-22, RPG-26. Their use is due to a number of such properties as small size and weight, which makes it possible to transfer them covertly, the range of the shot significantly exceeding the range of the hand grenade throw, the high detonating effect of the rocket grenade explosion. The single-use rocket launchers are generally of the same design. Their differences are in the features of the components construction and dimensional characteristics, which are given in the article. On the basis of expert practice, details ofgrenade launchers that remain at the site of the explosion and have the least damage are determined. These details are the objects of investigation of the explosion technical expertise. These objects include launchers of grenade launchers and rocket parts ofjet grenades. The design features of the launchers, their dimensional characteristics and marking symbols make it possible to determine their belonging to a specific type of jet grenade launchers. Missile parts of jet grenades differ in the form of the combustion chamber of the jet engine, nozzle, in the size ofthe outlet section of the nozzle, in the form and size of the stabilizerfeathers. To determine the belonging of the rocket part of the grenade to a specific type ofjet grenade launcher, it’s necessary to establish a set of structural features and dimensional characteristics. At considerable damage of the combustion chamber of the jet engine, as a rule, the nozzle block remains intact that allows to define diameter of critical section of a nozzle, and on it to establish type of the used single-use grenade launcher.

Profil Penyakit Malaria Di Rumah Sakit Islam Siti Rahmah Padang Tahun 2018

2020 ◽  
Vol 2 (2) ◽  
pp. 08-15
Author(s):  
Rahma Triyana ◽  
Salmi Salmi
Keyword(s):  
Observational Study ◽  
Frequency Distribution ◽  
Cross Section ◽  
Laboratory Tests ◽  
Age Group ◽  
Normal Range ◽  
Cross Sectional ◽  
West Sumatra ◽  
Severity Of The Disease

Malaria is one of the health problems in Indonesia, especially West Sumatra. Determination of the description of Malaria disease in an area is needed to determine the spread and severity of the disease. This study aims to determine the frequency distribution according to age, sex and place of residence, description of the types of Plasmodium causes of Malaria and hematological features in Malaria patients at Siti Rahmah Padang Hospital in 2018. This type of research is a descriptive observational study with an approach or design cross section (cross sectional). The frequency distribution of Malaria sufferers in Siti Rahmah Padang Hospital in 2018 according to the highest age was in the age group 21-30 years as many as 28 cases (36.8%), the highest sex among men was 46 (60.5%) and the highest number of residences was found in Koto Tangah sub-district there were 31 cases (40.8%). The type of Plasmodium found in Malaria cases in Siti Rahmah Padang Hospital in 2018 was P. vivax (73 cases (96.05%)) and P. falciparum (3 cases (3.95%)). The results of laboratory tests on Hb, hematocrit, platelet and leukocyte levels in Malaria positive patients in Siti Rahmah Padang Hospital in 2018 were in the normal range.

Profil Penyakit Malaria di Rumah Sakit Islam Siti Rahmah Padang Tahun 2018

2020 ◽  
Vol 2 (2) ◽  
pp. 08-15
Author(s):  
Rahma Triyana Y ◽  
Salmi Salmi
Keyword(s):  
Observational Study ◽  
Frequency Distribution ◽  
Cross Section ◽  
Laboratory Tests ◽  
Age Group ◽  
Normal Range ◽  
Cross Sectional ◽  
West Sumatra ◽  
Severity Of The Disease

Malaria is one of the health problems in Indonesia, especially West Sumatra. Determination of the description of Malaria disease in an area is needed to determine the spread and severity of the disease. This study aims to determine the frequency distribution according to age, sex and place of residence, description of the types of Plasmodium causes of Malaria and hematological features in Malaria patients at Siti Rahmah Padang Hospital in 2018. This type of research is a descriptive observational study with an approach or design cross section (cross sectional). The frequency distribution of Malaria sufferers in Siti Rahmah Padang Hospital in 2018 according to the highest age was in the age group 21-30 years as many as 28 cases (36.8%), the highest sex among men was 46 (60.5%) and the highest number of residences was found in Koto Tangah sub-district there were 31 cases (40.8%). The type of Plasmodium found in Malaria cases in Siti Rahmah Padang Hospital in 2018 was P. vivax (73 cases (96.05%)) and P. falciparum (3 cases (3.95%)). The results of laboratory tests on Hb, hematocrit, platelet and leukocyte levels in Malaria positive patients in Siti Rahmah Padang Hospital in 2018 were in the normal range.

Kinetic energy and spatial distribution of ions in high irradiance laser ionization source

2011 ◽  
Vol 26 (6) ◽  
pp. 1183 ◽  
Author(s):  
Yiming Lin ◽  
Ruibin Xu ◽  
Lingfeng Li ◽  
Wei Hang ◽  
Jian He ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Kinetic Energy ◽  
High Irradiance ◽  
Laser Ionization ◽  
Ionization Source

scholarly journals Quantitative Determination of the Surface Distribution of Supported Metal Nanoparticles: A Laser Ablation–ICP–MS Based Approach

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 77
Author(s):  
Davide Spanu ◽  
Gilberto Binda ◽  
Marcello Marelli ◽  
Laura Rampazzi ◽  
Sandro Recchia ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Ablation ◽  
Quantitative Determination ◽  
Metal Nanoparticles ◽  
Total Mass ◽  
Functional Materials ◽  
Metal Extraction ◽  
Ms Analysis ◽  
Icp Ms

A laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) based method is proposed for the quantitative determination of the spatial distribution of metal nanoparticles (NPs) supported on planar substrates. The surface is sampled using tailored ablation patterns and the data are used to define three-dimensional functions describing the spatial distribution of NPs. The volume integrals of such interpolated surfaces are calibrated to obtain the mass distribution of Ag NPs by correlation with the total mass of metal as determined by metal extraction and ICP–MS analysis. Once this mass calibration is carried out on a sacrificial sample, quantifications can be performed over multiple samples by a simple micro-destructive LA–ICP–MS analysis without requiring the extraction/dissolution of metal NPs. The proposed approach is here tested using a model sample consisting of a low-density polyethylene (LDPE) disk decorated with silver NPs, achieving high spatial resolution over cm2-sized samples and very high sensitivity. The developed method is accordingly a useful analytical tool for applications requiring both the total mass and the spatial distribution of metal NPs to be determined without damaging the sample surface (e.g., composite functional materials and NPs, decorated catalysts or electrodic materials).

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