scholarly journals PROSPECTS OF DEVELOPING AUTOMATED SYSTEMS OF CONTROL OVER OF PURSE SEINING AND MID-WATER TRAWLING PROCESSES

2019 ◽  
pp. 38-45
Author(s):  
Nina Vladimirovna Pryamuhina ◽  
Allaberdy Nazarmamedovich Nazarmamedov ◽  
Don Kuame Rafael ◽  
Aliya Baimuratovna Akhmedzhanova ◽  
Alexander Victorovich Melnikov
Keyword(s):  
Process Management ◽  
Low Cost ◽  
Purse Seine ◽  
Fishing Gear ◽  
Automated Systems ◽  
Efficient Operation ◽  
Functional Flexibility ◽  
Short Period ◽  
Automated Processes ◽  
Purse Seining

The article describes efficient operation of catching vessels, which mostly depends on their automation level. Development and improvement of technologies of mid-water trawl fishing and purse seining will be oriented to form automated systems for these very promising fishery methods. The experience of the development and operation of such systems in the fleet proves the increased productivity of the quality of work. Automated processes of mid-water trawling and purse seining will help to shorten operation costs of catching vessels due to decreasing the number of catch failures that reach 50% at present. Purse seine trawling and deep-sea trawling are characterized by a complex interaction of the crew with a technological control facility that includes a purse seine or trawl, a ship equipped with fishing gear, navigation and fish retrieval equipment. The process of purse seining and mid-water trawling consists of several stages, most of which require processing a large flow of input information, issuing commands in a short period of time, and taking into account dynamics of vessel maneuvering, as well. The resulting misalignment of these factors becomes a great number of catch failures and damages of fishing gear. Microprocessor systems with low cost and great functional flexibility can optimize the process of vessel operation control and close the gap between the amount of information and possibility to use it. The development of microprocessors has great opportunities due to creating the automated technical process management system.

scholarly journals Rapid, large-scale species discovery in hyperdiverse taxa using 1D MinION sequencing

BMC Biology ◽  
2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Amrita Srivathsan ◽  
Emily Hartop ◽  
Jayanthi Puniamoorthy ◽  
Wan Ting Lee ◽  
Sujatha Narayanan Kutty ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Large Scale ◽  
Low Cost ◽  
Small Body ◽  
Small Subset ◽  
Similar Species ◽  
Large Species ◽  
Morphological Examination ◽  
Species Discovery ◽  
Short Period

Abstract Background More than 80% of all animal species remain unknown to science. Most of these species live in the tropics and belong to animal taxa that combine small body size with high specimen abundance and large species richness. For such clades, using morphology for species discovery is slow because large numbers of specimens must be sorted based on detailed microscopic investigations. Fortunately, species discovery could be greatly accelerated if DNA sequences could be used for sorting specimens to species. Morphological verification of such “molecular operational taxonomic units” (mOTUs) could then be based on dissection of a small subset of specimens. However, this approach requires cost-effective and low-tech DNA barcoding techniques because well-equipped, well-funded molecular laboratories are not readily available in many biodiverse countries. Results We here document how MinION sequencing can be used for large-scale species discovery in a specimen- and species-rich taxon like the hyperdiverse fly family Phoridae (Diptera). We sequenced 7059 specimens collected in a single Malaise trap in Kibale National Park, Uganda, over the short period of 8 weeks. We discovered > 650 species which exceeds the number of phorid species currently described for the entire Afrotropical region. The barcodes were obtained using an improved low-cost MinION pipeline that increased the barcoding capacity sevenfold from 500 to 3500 barcodes per flowcell. This was achieved by adopting 1D sequencing, resequencing weak amplicons on a used flowcell, and improving demultiplexing. Comparison with Illumina data revealed that the MinION barcodes were very accurate (99.99% accuracy, 0.46% Ns) and thus yielded very similar species units (match ratio 0.991). Morphological examination of 100 mOTUs also confirmed good congruence with morphology (93% of mOTUs; > 99% of specimens) and revealed that 90% of the putative species belong to the neglected, megadiverse genus Megaselia. We demonstrate for one Megaselia species how the molecular data can guide the description of a new species (Megaselia sepsioides sp. nov.). Conclusions We document that one field site in Africa can be home to an estimated 1000 species of phorids and speculate that the Afrotropical diversity could exceed 200,000 species. We furthermore conclude that low-cost MinION sequencers are very suitable for reliable, rapid, and large-scale species discovery in hyperdiverse taxa. MinION sequencing could quickly reveal the extent of the unknown diversity and is especially suitable for biodiverse countries with limited access to capital-intensive sequencing facilities.

scholarly journals Seasonal Influence on the Performance of Low-Cost NO2 Sensor Calibrations

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7919
Author(s):  
Sjoerd van Ratingen ◽  
Jan Vonk ◽  
Christa Blokhuis ◽  
Joost Wesseling ◽  
Erik Tielemans ◽  
...  
Keyword(s):  
Low Cost ◽  
Added Value ◽  
Sensor Data ◽  
Sensor Technology ◽  
Monitoring Networks ◽  
Technical Problems ◽  
Eu Directive ◽  
Short Period ◽  
No2 Sensor ◽  
One Year

Low-cost sensor technology has been available for several years and has the potential to complement official monitoring networks. The current generation of nitrogen dioxide (NO2) sensors suffers from various technical problems. This study explores the added value of calibration models based on (multiple) linear regression including cross terms on the performance of an electrochemical NO2 sensor, the B43F manufactured by Alphasense. Sensor data were collected in duplicate at four reference sites in the Netherlands over a period of one year. It is shown that a calibration, using O3 and temperature in addition to a reference NO2 measurement, improves the prediction in terms of R2 from less than 0.5 to 0.69–0.84. The uncertainty of the calibrated sensors meets the Data Quality Objective for indicative methods specified by the EU directive in some cases and it was verified that the sensor signal itself remains an important predictor in the multilinear regressions. In practice, these sensors are likely to be calibrated over a period (much) shorter than one year. This study shows the dependence of the quality of the calibrated signal on the choice of these short (monthly) calibration and validation periods. This information will be valuable for determining short-period calibration strategies.

scholarly journals ANALISIS ASPEK TEKNIS KAPAL PUKAT CINCIN (PURSE SEINE) DAN ALAT TANGKAP YANG DIGUNAKAN NELAYAN DI PERAIRAN TELUK BONE

2020 ◽  
Vol 3 (2) ◽  
pp. 226-238
Author(s):  
Hawati Hawati ◽  
Angkasa Putra
Keyword(s):  
Survey Methods ◽  
Secondary Data ◽  
Purse Seine ◽  
Primary Data ◽  
Fishing Gear ◽  
Technical Aspects ◽  
Fish Resources ◽  
Trawl Fishing ◽  
Fisheries Regulation ◽  
Fishing Area

The utilization of fish resources by fishermen in the waters of Bone Bay uses different fishing gear and patterns as well as different utilization and management policies. This can affect the sustainability of existing fish resources, one of which is in the Bone Regency area. This study aims to analyze the technical aspects of purse seine and fishing gear used by fishermen in the waters of Bone Bay, especially in Bone Regency. Furthermore, the technical aspects of the vessel and fishing gear as a result of the calculation are compared with the provisions stipulated in the PERMEN-KP Number 71 of 2016 to determine the zone of the fishing area. This research was conducted in Panyula Village, which is the fishing base area of purse seine fishermen and the waters of Teluk Bone, starting from November 2016 to March 2017. This research uses a combination of survey methods and case studies. The type of data used consists of primary data and secondary data. Based on the technical aspects of purse seine vessels, ring trawl fishing gear and FAD fishing tools, purse seine units should be operated on Fishing Route II and Fishing Route III in accordance with Minister of Marine Affairs and Fisheries Regulation Number 71 of 2016.

scholarly journals Guidance Stabilization of Satellites Using the Geomagnetic Field

2012 ◽  
Vol 2012 ◽  
pp. 1-9
Author(s):  
Francisco Miranda
Keyword(s):  
Geomagnetic Field ◽  
Technological Development ◽  
Low Cost ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Small Satellites ◽  
Attitude Stabilization ◽  
Short Period ◽  
Low Earth Orbit Satellite ◽  
Games Theory

In the last years the small satellites have played an important role in the technological development. The attractive short period of design and low cost of them and the capacity to solve problems that are usually considered as problems to big and expensive spacecrafts lead us to study the control problem of these satellites. Active three-axis magnetic attitude stabilization of a low Earth orbit satellite is considered in this work. The control is created by interaction between the magnetic moment generated by magnetorquers mounted on the satellite body and the geomagnetic field. This problem is quite complex and difficult to solve. To overcome this difficulty guidance control is considered, where we use ε-strategies introduced by Pontryagin in the frame of differential games theory. Qualitative analysis and results of numerical simulation are presented.

OPERATION STUDY AND CONSTRUCTION OF PURSE SEINE AT KM MARWAH LAMPULO ACEH UTARA

2020 ◽  
Vol 4 (1) ◽  
pp. 47-56
Author(s):  
Roma Yuli F Hutapea ◽  
Ratu Sari Mardiah ◽  
M. Nur Arkham ◽  
Ratih Purnama Sari ◽  
Wewen Nassa Syaputra
Keyword(s):  
Pelagic Fish ◽  
Purse Seine ◽  
Fishing Gear ◽  
Trawl Fishing ◽  
Construction Operation

Aceh is a province located at the western tip of Indonesia. Aceh's territorial waters are very strategic waters. The dominant fishing gear used by fishermen in Aceh is the purse seine. The reason many fishermen use purse seines in Aceh is because the waters of Aceh have a lot of pelagic fish potential, where the target of purse seines is pelagic fish. The purpose of this research is to know and understand the construction of purse seines in KM Marwah Lampulo Aceh Utara; as well as knowing and understanding the operation of purse seine fishing gear in Lampulo, North Aceh. The type of purse seine used by KM Marwah is trapezoid. Ring seine construction with PE (Polyethylene) nets with mesh sizes of 1-3 inches. The upper ris rope is 600 m long and 10 mm in diameter, while the lower ris rope is 12 mm in diameter, with a length of 600 m. Selvedge is used for net protection so that it is not easily torn. PE (Polyethylene) rope with a length of 650 meters. PE (polyethylene) based weight rope. Ring strap with a diameter of 10 mm and made from PE (polyethylene). 6000 pieces of PVC-based buoys and 4800 lead-based weights. The operation of the purse seine consists of a setting, namely the process of preparing and lowering the trawl fishing gear into the water, after the catch is collected and the nets have formed a bowl, then proceed with hauling, which is the activity of raising fishing gear onto the ship. Keywords Aceh, construction, operation, purse seine

scholarly journals Mind-Wave Controlled Robot: An Arduino Robot Simulating the Wheelchair for Paralyzed Patients

2018 ◽  
Vol 1 (1) ◽  
pp. 6
Author(s):  
Chi Hang Cheng ◽  
Shuai Li ◽  
Seifedine Kadry
Keyword(s):  
Neural Network ◽  
Low Cost ◽  
Eeg Signal ◽  
The Neural Network ◽  
Lead Electrode ◽  
Short Period ◽  
Specific Position ◽  
And Control

This project attempts to implement an Arduino robot to simulate a brainwave-controlled wheelchair for paralyzed patients with an improved controlling method. The robot should be able to move freely in anywhere under the control of the user and it is not required to predefine any map or path. An accurate and natural controlling method is provided, and the user can stop the robot any time immediately to avoid risks or danger. This project is using a low-cost and a brainwave-reading headset which has only a single lead electrode (Neurosky mind wave headset) to collect the EEG signal. BCI will be developed by sending the EEG signal to the Arduino Mega and control the movement of the robot. This project used the eye blinking as the robot controlling method as the eye blinking will cause a significant pulse in the EEG signal. By using the neural network to classify the blinking signal and the noise, the user can send the command to control the robot by blinking twice in a short period of time. The robot will be evaluated by driving in different places to test whether it can follow the expected path, avoid the obstacles, and stop in a specific position.

scholarly journals Real-Time Automatic Cloud Detection Using a Low-Cost Sky Camera

2020 ◽  
Vol 12 (9) ◽  
pp. 1382 ◽  
Author(s):  
Joaquín Alonso-Montesinos
Keyword(s):  
Real Time ◽  
Energy Production ◽  
Production Management ◽  
Detection System ◽  
Low Cost ◽  
Color Spaces ◽  
Cloud Detection ◽  
Precise Control ◽  
Short Period ◽  
Sky Conditions

Characterizing the atmosphere is one of the most complex studies one can undertake due to the non-linearity and phenomenological variability. Clouds are also among the most variable atmospheric constituents, changing their size and shape over a short period of time. There are several sectors in which the study of cloudiness is of vital importance. In the renewable field, the increasing development of solar technology and the emerging trend for constructing and operating solar plants across the earth’s surface requires very precise control systems that provide optimal energy production management. Similarly, airports are hubs where cloud coverage is required to provide high-precision periodic observations that inform airport operators about the state of the atmosphere. This work presents an autonomous cloud detection system, in real time, based on the digital image processing of a low-cost sky camera. An algorithm was developed to identify the clouds in the whole image using the relationships established between the channels of the RGB and Hue, Saturation, Value (HSV) color spaces. The system’s overall success rate is approximately 94% for all types of sky conditions; this is a novel development which makes it possible to identify clouds from a ground perspective without the use of radiometric parameters.

Characterization of Hemp Fiber Using Microwave-Assisted Extraction (MAE) Pretreatment

2010 ◽  
Vol 148-149 ◽  
pp. 1594-1599
Author(s):  
Guo Jun Han ◽  
Li Jun Qu ◽  
Xiao Qing Guo
Keyword(s):  
Low Cost ◽  
Microwave Assisted Extraction ◽  
X Ray Diffraction ◽  
Acid Pretreatment ◽  
Hemp Fiber ◽  
Hemp Fibers ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Short Period ◽  
Index Contrast

The main objective of this paper was to investigate a low cost pretreatment method, namely microwave-assisted extraction(MAE) pretreatment, which could be applied to hemp degumming with low environmental impact. Degumming index, contrast of different pretreatment methods, transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and single fiber tensile testing were used to characterise the effect of pretreatment on hemp fibers. In this paper, the results of degumming effect were given comparing MAE pretreatment with acid pretreatment for hemp degumming. It was found that the MAE pretreatment could remove non-cellulosic compounds from hemp bundles effectively with very short period of time. Meanwhile, seen from SEM micrographs, the fibers pretreated by MAE were cleaner than that of fibers pretreated by acid. These results suggested that MAE pretreatment was higher efficiency and more environmental friendly than traditional pretreatment methods.

Research and Application of Efficient Operation Technology

2014 ◽  
Vol 1030-1032 ◽  
pp. 1760-1763
Author(s):  
Yan Xia Li ◽  
Zheng Long Shao ◽  
Nai Jia Liu ◽  
Yu Peng
Keyword(s):  
Performance Evaluation ◽  
High Efficiency ◽  
Low Cost ◽  
End Users ◽  
Application Performance ◽  
Efficient Operation ◽  
High Satisfaction ◽  
Virtualization Technology ◽  
Efficient Integration

With the development of information, the number of applications is growing. The questions of cost, support, risk and safety also arise. In order to realize low cost and high efficiency, we have studied the efficient operation technologies, including application isolation technology, virtualization technology, performance evaluation technology, etc. Using these technologies, we have realized efficient integration of operation resources, comprehensive optimization of application performance, and high satisfaction of end users.

scholarly journals Comparing RGB-D Sensors for Close Range Outdoor Agricultural Phenotyping

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4413 ◽  
Author(s):  
Adar Vit ◽  
Guy Shani
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Manual Labor ◽  
Automated Systems ◽  
Light Conditions ◽  
Current State ◽  
Field Phenotyping ◽  
Outdoor Experiment ◽  
Close Range ◽  
Plant Attributes

Phenotyping is the task of measuring plant attributes for analyzing the current state of the plant. In agriculture, phenotyping can be used to make decisions concerning the management of crops, such as the watering policy, or whether to spray for a certain pest. Currently, large scale phenotyping in fields is typically done using manual labor, which is a costly, low throughput process. Researchers often advocate the use of automated systems for phenotyping, relying on the use of sensors for making measurements. The recent rise of low cost, yet reasonably accurate, RGB-D sensors has opened the way for using these sensors in field phenotyping applications. In this paper, we investigate the applicability of four different RGB-D sensors for this task. We conduct an outdoor experiment, measuring plant attribute in various distances and light conditions. Our results show that modern RGB-D sensors, in particular, the Intel D435 sensor, provides a viable tool for close range phenotyping tasks in fields.

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