Range Of Technical Parameters Research Articles

GÜLLƏ ATICILIĞINDA İDEOMOTOR HAZIRLIĞIN METODİKASINA DAİR

Methodology of Ideomotor Preparation in Shooting Summary The methodology of ideomotor preparation in shooting is great importance in terms of improving the system of athletes' preparation and the theory and methodology of sports training. In this regard, the article discusses the connection of practical structures that allow clarifying the imagination created about the correct movements in advance, forming the whole range of technical parameters and main movement phases in the imagination sequentially, and then, by repeating it several times, fixing it in memory to perform it more confidently, accurately, and freely at the necessary place and moment. This is because difficulties arise in the execution and application of movements without knowing the technique of movements perfectly. The details, conditions, and the important role of the technique of physical movements of ideomotor preparation are explained in the presented article, and all these are highlighted, attracting theoretical analysis. Key words: shot put, ideomotor preparation, training, methodology

Parameterization proposal to determine the feasibility of geographic areas for the green hydrogen industry under socio-environmental and technical constraints in Chile

Chile, abundant in solar and wind energy resources, presents significant potential for the production of green hydrogen, a promising renewable energy vector. However, realizing this potential requires an understanding of the most suitable locations for the installation of green hydrogen industries. This study proposes a quantitative methodology that identifies and ranks potential public lands for industrial use, based on a range of technical parameters (such as solar and wind availability) and socio-environmental considerations (including land use restrictions and population density). The results reveal optimal locations that can facilitate informed, sustainable decision-making for large-scale green hydrogen implementation in Chile. While this methodology does not replace project-specific technical or environmental impact studies, it provides a flexible, general classification to guide initial site selection. Notably, this approach can be applied to other regions worldwide with abundant solar and wind resources, such as Australia and Northern Africa, promoting more effective and sustainable global decision-making for green hydrogen production.

Free Carrier Mobility, Series Resistance, and Threshold Voltage Extraction in Junction FETs

In this brief, extraction methods are proposed for determining the essential parameters of double gate junction field-effect transistors (FETs). First, a novel method for determining free carrier effective mobility, similar to a recently proposed method for MOSFETs, is developed. The same method is then extended to cover also the case when series resistance is present, while series resistance itself may be determined from the measurement from two FETs with different channel lengths. The key technological and design parameter is the threshold voltage, which may be unambiguously determined from the transconductance-to-current ratio with a constant-current method. The new methods are shown to be effective over a wide range of technical parameters, using technology computer-aided design simulations.

Identify suitable range of technical parameters for the best porosity of Cr3C2 – NiCr coating on C45 steel by high velocity oxygen-fuel spraying method (HVOF)

Nowadays, spray coating technology has been developed and widely applied in developed countries. One of the spraying methods which are most commonly used in industry is HVOF. Basically, coating layers created by HVOF are very complicated, its characteristics and microstructure strongly depend on spraying technical parameters. This paper presents experiment result of spraying Cr3C2-NiCr on 40Cr by HVOF. On the other hand, the effect of some spraying technical parameters to the porosity of coating layer is also analyzed. From experimental results, a suitable range of spraying technical parameters has been identified that could be applied to recovery shaft type wearing parts.

Radiation Dose Reduction in Chest Radiography using a Flat-Panel Amorphous Silicon Detector

AIM: The aim of this study was to evaluate the image quality and the potential for radiation dose reduction with a digital flat-panel amorphous silicon detector radiography system. MATERIAL AND METHODS: Using flat-panel technology, radiographs of an anthropomorphic thorax phantom were taken with a range of technical parameters (125kV, 200mA and 5, 4, 3.2, 2, 1, 0.5, and 0.25mAs) which were equivalent to a radiation dose of 332, 263, 209, 127, 58.7, 29, and 14μGy, respectively. These images were compared to radiographs obtained by a conventional film-screen radiography system at 125kV, 200mA and 5mAs (equivalent to 252μGy) which served as reference. Three observers evaluated independently the visibility of simulated rounded lesions and anatomical structures, comparing printed films from the flat-panel amorphous silicon detector and conventional x-ray system films. RESULTS: With flat-panel technology, the visibility of rounded lesions and normal anatomical structures at 5, 4, and 3.2mAs was superior compared to the conventional film-screen radiography system. (P⩽0.0001). At 2mAs, improvement was only marginal (P=0.19). At 1.0, 0.5 and 0.25mAs, the visibility of simulated rounded lesions was worse (P⩽0.004). Comparing fine lung parenchymal structures, the flat-panel amorphous silicon detector showed improvement for all exposure levels down to 2mAs and equality at 1mAs. CONCLUSION: Compared to a conventional x-ray film system, the flat-panel amorphous silicon detector demonstrated improved image quality and the possibility for a reduction of the radiation dose by 50% without loss in image quality. Hosch, W. P. etal. (2002). Clinical Radiology57, 902–907.

Moulding characteristics of sand mixture with partial vacuum suction techniques

The compaction of moulding sand mixture is critical for dimensional accuracy and surface finish of castings. This paper reports the moulding characteristics of resin bonded sand mixture under negative pressure formed by partial vacuum suction process. The main factors such as the volume and the predetermined vacuum pressure of the vacuum tank, the opening rate of venting holes on the pattern plate and on the suction plate, the size of the mould, the suction time and the mould density distribution along the vertical direction in the sand flask were examined. The optimised range of technical parameters and potential improving methods were also suggested. Based on the analysis of experimental results, a new concept, compacting impulse, was suggested to evaluate the compaction of moulding sand mixture.