Flow Characteristics and Energy Analysis in Solar Dryers

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Ion Seres ◽  
I. Farkas
Keyword(s):  
Energy Analysis ◽  
Control Method ◽  
Flow Characteristics ◽  
Efficiency Analysis ◽  
Optical Control ◽  
Solar Drying ◽  
Measurement Results ◽  
Different Types ◽  
Vegetables And Fruits ◽  
Operational Methods

The paper presents the research results on solar drying achieved in the Department of Physics and Process Control, Szent Istv�n University. First the used modular solar dryer is presented together with the different operational methods, and energy and efficiency analysis. The results from the theoretical modeling of the drying processes are compared to the measurement results for different types of vegetables and fruits. The measurements of some material properties and an optical control method are also presented.

scholarly journals Research of the Photo-Optical Method Application for Measuring Selected Data on the Movement of a Parachute for Type M-282

2021 ◽  
Vol 11 (12) ◽  
pp. 5637
Author(s):  
Peter Kaľavský ◽  
Róbert Rozenberg ◽  
Peter Korba ◽  
Martin Kelemen ◽  
Matej Antoško ◽  
...  
Keyword(s):  
Optical Method ◽  
Training Programs ◽  
Performance Standard ◽  
Motion Data ◽  
Innovative Methods ◽  
Measurement Results ◽  
Different Types ◽  
Vertical Speed ◽  
Individualized Training ◽  
Minimum Performance

Testing in the field of parachute technology provides space for the application of new and innovative methods of measuring operating and functional parameters. The main aim of the paper is to present the results of research for the verification of the photo-optical method of measuring the vertical speed of the M-282 parachutes, and for its use in testing, collecting, and investigating motion data in parachuting. As part of this measuring technology, twelve jumps were performed. It was verified that the experiment was completed for the M-282 parachute according to the regulation of SAE AS 8015B “Minimum Performance Standard Parachute Assemblies and Components”. An analysis of the influencing factors and quantification of their influence on the uncertainty of the measurement results was also performed. The results of the measurement achieved by using the photo-optical method were compared with the measurement with the electronic variometer FLYTEC 4030. The vertical speed of the M-282 parachute (4.655 m·s−1) defined by the photo-optical method is significantly similar to the vertical speed of the M-282 parachute (4.662 m·s−1) defined by FLYTEC 4030. We can state that the process of identifying the vertical speed of the parachute by the photo-optical method was correct. This is a suitable method of evaluating motion data in the operation of M-282 type parachutes. In the following research for generalization of the methodology, we assume the performance of more than 60 experimental jumps using different types of parachutes, digital sensors (cameras), and a photo-optical method to examine motion data and formulate recommendations for testing, investigative applications, individualized training programs, and aspects of parachuting injury prevention.

Energy Analysis of the Direct and Indirect Solar Drying System

2017 ◽  
pp. 529-542
Author(s):  
Om Prakash ◽  
Anil Kumar ◽  
Prashant Singh Chauhan ◽  
Daniel I. Onwude
Keyword(s):  
Energy Analysis ◽  
Solar Drying ◽  
Drying System

Energy Analysis of Solar Drying Systems

2020 ◽  
pp. 103-122
Author(s):  
Om Prakash ◽  
Anil Kumar
Keyword(s):  
Energy Analysis ◽  
Solar Drying

scholarly journals Organophosphate Pesticide Residue in Fruits and Vegetables

2018 ◽  
Vol 14 (2) ◽  
pp. 172-177
Author(s):  
Joko Sudarsono ◽  
Setyo Sri Rahardjo ◽  
Kisrini Kisrini
Keyword(s):  
Pesticide Residue ◽  
Fruits And Vegetables ◽  
Limit Of Detection ◽  
Sampling Procedure ◽  
Cross Sectional ◽  
Traditional Markets ◽  
Measurement Results ◽  
Cross Sectional Design ◽  
Vegetables And Fruits ◽  
Active Substances

The use of the pesticide which does not follow the procedure may potentially cause residue of pesticide to be left on vegetables and fruits sold in supermarkets and traditional markets. We aimed to find the pattern of pesticide usage and levels of residue found in plants. This study was an analytical observation with a cross-sectional design using detailed sampling procedure. We obtained the data of the pesticide residue concentration by conducting laboratory examinations on eight samples of cabbage and eight samples of tomatoes from traditional markets and supermarkets in the city of Solo. The data were tested using simple linear regression testing. The organophosphate measurement results showed no residues were detected, because it was below the Limit of Detection (LOD). We concluded that pesticides containing active substances were not used in the vegetables we tested or the active substances were no longer contained in the vegetables after harvesting.

Numerical investigation of hydrodynamic characteristics of fish-like undulation using the adaptive dynamic-grid method

2021 ◽  
pp. 2150299
Author(s):  
Zeyu Guo ◽  
Gucheng Zhu ◽  
Zuogang Chen ◽  
Yukun Feng
Keyword(s):  
Frictional Force ◽  
Control Method ◽  
Turbulent Viscosity ◽  
Flow Characteristics ◽  
Grid Method ◽  
Wave Number ◽  
Hydrodynamic Characteristics ◽  
Substantial Impact ◽  
Vortex Patterns ◽  
Undulatory Swimming

To investigate the hydrodynamics of undulatory swimming, a key issue in numerical analysis is to determine the correlation between undulatory locomotion and the flow characteristics. In this study, a novel dynamic-grid generation method, the adaptive control method, is implemented to deal with the moving and morphing boundaries in an unsteady flow field at all Reynolds numbers. This method, based on structured grids, can ensure the orthogonality and absolute controllability of the grids and is performed to precisely simulate the wake and the boundary layer. The NACA0010 wing is employed as a two-dimensional (2D) body model of a fish in the simulations. To maintain the calculation stability, the increase stage of the amplitude is defined as a smooth transitional stage. Analysis of hydrodynamic coefficients reveals that undulation results in a significant increase of frictional force in laminar flow [Formula: see text]. However, the undulation also results in a reduction of the frictional force when the fish swims in turbulent flow [Formula: see text]. The vorticity distribution and the [Formula: see text]-criterion are both used to accurately capture the shedding vortexes in the wake. Furthermore, these vortex pairs have a substantial impact on the turbulence and the wake, in which the turbulent kinetic energy and the turbulent viscosity ratio both decrease at [Formula: see text]. The wake of an undulatory fish presents different vortex patterns with various kinematic parameters. When the phase velocity is greater than the incoming velocity and the wave number is sufficiently large, thrust is yielded, accompanying the distinct reverse Karman Street in the wake.

Research on Human-Computer Interaction Control Method in the Background of Internet of Things

2021 ◽  
Author(s):  
Yingying Hu ◽  
Zhongyang Li
Keyword(s):  
Internet Of Things ◽  
Control Method ◽  
Computer Control ◽  
Control Device ◽  
Smart Devices ◽  
The Internet ◽  
Interactive Control ◽  
Interaction Control ◽  
Different Types ◽  
The Internet Of Things

Against the background of the growing development of the Internet of Things, this article conducts research on more efficient methods for controlling the interconnection of all things, and proposes that smart devices use the same operating platform, and the human-computer interface presents universal modular controls for manipulation, it can satisfy the requirement that one device controls several different types of controlled device simultaneously. At the same time, the interactive method uses the controlled device to actively submit control content to the control device, and discusses the human-computer interactive control method applicable to the Internet of Everything, and strives to achieve a convenient and easy-to-use human-computer control experience.

scholarly journals Random Telegraph Noises from the Source Follower, the Photodiode Dark Current, and the Gate-Induced Sense Node Leakage in CMOS Image Sensors

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5447
Author(s):  
Calvin Yi-Ping Chao ◽  
Shang-Fu Yeh ◽  
Meng-Hsu Wu ◽  
Kuo-Yu Chou ◽  
Honyih Tu ◽  
...  
Keyword(s):  
Dark Current ◽  
Image Sensors ◽  
Integration Time ◽  
X Ray ◽  
Multiple Sampling ◽  
Cmos Image Sensors ◽  
Measurement Results ◽  
Source Follower ◽  
Different Types ◽  
Dark Signal

In this paper we present a systematic approach to sort out different types of random telegraph noises (RTN) in CMOS image sensors (CIS) by examining their dependencies on the transfer gate off-voltage, the reset gate off-voltage, the photodiode integration time, and the sense node charge retention time. Besides the well-known source follower RTN, we have identified the RTN caused by varying photodiode dark current, transfer-gate and reset-gate induced sense node leakage. These four types of RTN and the dark signal shot noises dominate the noise distribution tails of CIS and non-CIS chips under test, either with or without X-ray irradiation. The effect of correlated multiple sampling (CMS) on noise reduction is studied and a theoretical model is developed to account for the measurement results.

scholarly journals Bidirectional Quantum Communication through the Composite GHZ-GHZ Channel

2020 ◽  
Vol 10 (16) ◽  
pp. 5500
Author(s):  
Shuangshuang Shuai ◽  
Na Chen ◽  
Bin Yan
Keyword(s):  
Quantum Communication ◽  
Information Leakage ◽  
Quantum Measurements ◽  
Transmission Scheme ◽  
Quantum Bits ◽  
Ghz States ◽  
Surrounding Environment ◽  
Measurement Results ◽  
Different Types ◽  
Communication Scheme

This paper solved the problem of transmitting quantum bits (qubits) in a multi-hop and bidirectional way. Considering that the Greenberger–Horne–Zeilinger (GHZ) states are less prone to the decoherence effects caused by the surrounding environment, we proposed a bidirectional quantum communication scheme based on quantum teleportation and the composite GHZ-GHZ states. On a multi-hop quantum path, different types of GHZ states are previously shared between the adjacent intermediate nodes. To implement qubit transmission, the sender and intermediate nodes perform quantum measurements in parallel, and then send their measurement results and the types of previously shared GHZ states to the receiver independently. Based on the received information, the receiver performs unitary operations on the local particle, thus retrieving the original qubit. Our scheme can avoid information leakage at the intermediate nodes and can reduce the end-to-end communication delay, in contrast to the hop-by-hop qubit transmission scheme.

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