scholarly journals On the relationship between fundamental science and contemporary applied research in the field of high-rate laser Nanowhiskerography

2021 ◽  
Vol 34 (06) ◽  
pp. 1730-1739
Author(s):  
Sergey Nikoloaevich Maksimovsky ◽  
Alexandr Nikolaevich Bobkov ◽  
Aleksey Urievich Stavtsev
Keyword(s):  
High Pressures ◽  
High Rate ◽  
Condensed State ◽  
Threshold Power ◽  
Practical Applications ◽  
Relevant Today ◽  
New Type ◽  
Solar Silicon ◽  
Nobel Prize Laureates ◽  
The Relationship

In practice, in various areas of life, there is often a need to use materials that have mutually exclusive requirements. Therefore, the study of the issues related to manufacturing materials in certain states for certain technical applications, and methods of controlling structurally sensitive properties to obtain specified effects, is quite relevant today. A new effect was discovered, namely, the rapid growth of amorphous and composite materials in the form of “coherent” nanowhiskers using laser-induced plasma at temperatures exceeding 4,000oC and high pressures up to 100 thousand atmospheres at a rate reaching 80-100 m/s. This method of growing whiskers is based on fundamental studies of pulsed laser radiation and predictions of Nobel Prize laureates – Ch.H. Townes, A.M. Prokhorov (splitting of a laser beam of above-threshold power) and G.A. Askaryan (effects of self-focusing of light in the condensed state of matter, and sublimation evaporation). The authors show possible practical applications of this method, such as protection of securities, banknotes, and plastic cards, as well as production of a new type of silicon batteries, automotive catalysts, and solar silicon batteries.

scholarly journals Estimating Functional Threshold Power in Endurance Running from Shorter Time Trials Using a 6-Axis Inertial Measurement Sensor

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 582
Author(s):  
Antonio Cartón-Llorente ◽  
Felipe García-Pinillos ◽  
Jorge Royo-Borruel ◽  
Alberto Rubio-Peirotén ◽  
Diego Jaén-Carrillo ◽  
...  
Keyword(s):  
Time Trial ◽  
Accurate Estimation ◽  
Threshold Power ◽  
Endurance Running ◽  
Mean Power ◽  
Running Time ◽  
Practical Applications ◽  
Sporting Activities ◽  
Mean Power Output ◽  
The Relationship

Wearable technology has allowed for the real-time assessment of mechanical work employed in several sporting activities. Through novel power metrics, Functional Threshold Power have shown a reliable indicator of training intensities. This study aims to determine the relationship between mean power output (MPO) values obtained during three submaximal running time trials (i.e., 10 min, 20 min, and 30 min) and the functional threshold power (FTP). Twenty-two recreationally trained male endurance runners completed four submaximal running time trials of 10, 20, 30, and 60 min, trying to cover the longest possible distance on a motorized treadmill. Absolute MPO (W), normalized MPO (W/kg) and standard deviation (SD) were calculated for each time trial with a power meter device attached to the shoelaces. All simplified FTP trials analyzed (i.e., FTP10, FTP20, and FTP30) showed a significant association with the calculated FTP (p < 0.001) for both MPO and normalized MPO, whereas stronger correlations were found with longer time trials. Individual correction factors (ICF% = FTP60/FTPn) of ~90% for FTP10, ~94% for FTP20, and ~96% for FTP30 were obtained. The present study procures important practical applications for coaches and athletes as it provides a more accurate estimation of FTP in endurance running through less fatiguing, reproducible tests.

scholarly journals Sodium Metasilicate Cemented Analogue Material and Its Mechanical Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Songlin Yue ◽  
Yanyu Qiu ◽  
Pengxian Fan ◽  
Pin Zhang ◽  
Ning Zhang
Keyword(s):  
Complex Geometry ◽  
Sodium Metasilicate ◽  
Raw Material ◽  
Fine Aggregate ◽  
Regression Equations ◽  
Deformation And Failure ◽  
Orthogonal Experiments ◽  
Low Modulus ◽  
New Type ◽  
The Relationship

Analogue material with appropriate properties is of great importance to the reliability of geomechanical model test, which is one of the mostly used approaches in field of geotechnical research. In this paper, a new type of analogue material is developed, which is composed of coarse aggregate (quartz sand and/or barite sand), fine aggregate (barite powder), and cementitious material (anhydrous sodium silicate). The components of each raw material are the key influencing factors, which significantly affect the physical and mechanical parameters of analogue materials. In order to establish the relationship between parameters and factors, the material properties including density, Young’s modulus, uniaxial compressive strength, and tensile strength were investigated by a series of orthogonal experiments with hundreds of samples. By orthogonal regression analysis, the regression equations of each parameter were obtained based on experimental data, which can predict the properties of the developed analogue materials according to proportions. The experiments and applications indicate that sodium metasilicate cemented analogue material is a type of low-strength and low-modulus material with designable density, which is insensitive to humidity and temperature and satisfies mechanical scaling criteria for weak rock or soft geological materials. Moreover, the developed material can be easily cast into structures with complex geometry shapes and simulate the deformation and failure processes of prototype rocks.

Study on Water Cushion Belt Conveyor

2014 ◽  
Vol 1016 ◽  
pp. 14-18
Author(s):  
Xian Wei Liu ◽  
Jia Sheng Wang ◽  
Lan Tao Wu ◽  
Xin Zhang ◽  
Hua Cheng
Keyword(s):  
Reynolds Equation ◽  
Belt Conveyor ◽  
Working Mechanism ◽  
Film Properties ◽  
Practical Applications ◽  
Lubrication Equation ◽  
Start Up ◽  
New Type ◽  
Air Cushion ◽  
Lubricating Mechanism

Based on air cushion belt conveyor, a new type of belt conveyor named water cushion belt conveyor is proposed. It has a wide scope of applications for its features such as stability and reliability, capability of full load start-up, and environment-friendliness. This paper studies the working mechanism and lubricating mechanism of the water cushion belt conveyor. The basic lubrication equation of the water cushion is deduced from the universal form of the Reynolds equation used to study the pressure film properties of the water cushion. The design of the key part of the water cushion device is described in details. The research can be taken as a reference in practical applications.

Thermodynamic Performance of an Actual Thermo-Acoustic Refrigeration Micro-Cycle

2012 ◽  
Vol 614-615 ◽  
pp. 64-68
Author(s):  
Tuo Wang ◽  
Feng Wu ◽  
Jin Hua Fei ◽  
Ming Fang Liu
Keyword(s):  
Coefficient Of Performance ◽  
Pressure Amplitude ◽  
Cooling Load ◽  
Acoustic Effect ◽  
Thermodynamic Performance ◽  
Monotonically Increasing Function ◽  
Analytic Expressions ◽  
New Type ◽  
The Relationship ◽  
Increasing Function

Thermo-acoustic refrigerator is a new type of engine, which is based on the thermo-acoustic effect. A new model which expresses as an ellipse in pressure-volume diagram is established to investigate the thermodynamic performance of an actual thermo-acoustic refrigeration micro-cycle. The demarcation points of endothermic processes and exothermic processes in the actual micro-cycle are found. The analytic expressions of the dimensionless cooling load and the coefficient of performance (COP) are deduced. The relationship between the dimensionless cooling load and the COP are investigated by numerical examples. The results show that the dimensionless cooling load is a monotonically increasing function of the COP and the pressure amplitude.

Đánh giá nồng độ lactate và procalcitonin ở bệnh nhân Covid-19

2022 ◽  
Author(s):  
Thanh Xuan Nguyen
Keyword(s):  
Serum Level ◽  
Respiratory Infections ◽  
Severe Pneumonia ◽  
Cross Sectional Study ◽  
Multiple Organ ◽  
High Rate ◽  
Rt Pcr ◽  
Wuhan City ◽  
Cross Sectional ◽  
The Relationship

TÓM TẮT Đặt vấn đề: Bệnh COVID-19 đa dạng từ không có triệu chứng đến có các triệu chứng nhẹ cho đến viêm phổi nặng, hội chứng suy hô hấp cấp tiến triển (ARDS), nhiễm khuẩn huyết suy đa tạng và tử vong. Người cao tuổi, người có bệnh mạn tính sẽ có nguy cơ diễn biến nặng nhiều hơn. Nghiên cứu này nhằm xác định nồng độ lactate và PCT ở những bệnh nhân Covid-19 và xét mối liên quan giữa lactate và PCT trên bệnh nhân Covid-19. Đối tượng và phương pháp: Nghiên cứu mô tả cắt ngang trên 126 bệnh nhân được chẩn đoán nhiễm Sars-Cov-2 bằng xét nghiệm RT PCR. Kết quả: Tuổi trung bình 55,98 ± 17,1 tuổi (4 - 98 tuổi). Bệnh nhân > 60 tuổi chiếm tỉ lệ cao nhất (42,8%). Trung vị PCT: 3,6 (95%CI:3,21 - 3,75) ng/ml; trung vị lactate 1,5 (95%CI:1,21 - 1,91) mmol/L; lactate có tương quan thuận và yếu với procalcitonin với r = 0,241; p < 0,001. Nồng độ procalcitonin > 0,1 ng/ml; lactate > 2 mmol/l ở bệnh nhân Covid-19 chiếm tỷ lệ cao với 89,7% và 39,7%. Kết luận: Chỉ điểm procalcitonin, lactate tăng cao ở bệnh nhân Covid-19. ABSTRACT ASSESSMENT OF SERUM LEVEL OF LACTATE AND PROCALCITONIN IN COVID-19 PATIENTS Background: Sars-CoV-2 has been identified as the cause of acute respiratory infections in Wuhan city, Hubei province, China, and has since spread worldwide. Sars-CoV-2 is capable of aerosol transmission in enclosed, crowded, and poorly ventilated spaces. COVID-19 illness ranges from asymptomatic to mild symptoms to severe pneumonia, acute respiratory distress syndrome (ARDS), sepsis, multiple organ failure, and death. This study aims to determine lactate and PCT levels in Covid-19 patients and examine the relationship between lactate and PCT in Covid-19 patients. Methods: A cross-sectional study was performed on 126 patients diagnosed with Sars-Cov-2 infection by RT-PCR. Results: Mean age was 55.98 ± 17.1 years (range: 4-98 years). Patients more than 60 years old were accounted for the highest rate (42.8%). Median PCT: 3.6 (95%CI:3.21 - 3.75) ng/ml; median lactate 1.5 (95%CI:1.21 - 1,91) mmol/L; lactate has a positive and weak correlation with procalcitonin with r = 0.241; p < 0.001. Procalcitonin concentration > 0.1 ng/ml; lactate > 2 mmol/l in patients with Covid-19 accounted for a high rate with 89.7% and 39.7%. Conclusion: Serum level of procalcitonin and lactate raise highly in Covid-19 patients. Keywords: Covid-19, procalcitonin, lactate.

scholarly journals Estimation of Peak Flow in Ungauged Catchments Using the Relationship between Runoff Coefficient and Curve Number

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1669 ◽  
Author(s):  
Nam Kim ◽  
Mun-Ju Shin
Keyword(s):  
Peak Flow ◽  
Curve Number ◽  
Rational Method ◽  
Runoff Coefficient ◽  
Data Generation ◽  
Ungauged Catchments ◽  
Practical Applications ◽  
Flow Estimation ◽  
Rainfall Runoff Model ◽  
The Relationship

Hourly flood flow estimation for gauged and ungauged catchments is a prerequisite for planning and water management. Various methods have been applied in a multitude of studies to calculate the peak flow for ungauged catchments. However, it is not simple for engineers to use the existing methods in practical applications. An easier method is suggested for this purpose in this study. The authors estimated the relationship between the runoff coefficient, intensity of rainfall, and curve number, and then utilized the relationship to calculated the peak flow using the rational method for ungauged catchments. Rainfall and flood time series for ungauged study catchments were generated by a simple data generation method and a distributed rainfall–runoff model. Results showed that the runoff coefficients simulated using the estimated relationship reasonably agree with the runoff coefficients in the studied ungauged catchments. In addition, the peak flow simulated using the rational method and the relationship highly agree with the peak flow in the ungauged catchments. Therefore, the peak flow in ungauged catchments can be easily calculated by this method, which is more pragmatic for engineers.

scholarly journals Motives of volunteering and values of work among higher education students

2017 ◽  
Vol 16 (2) ◽  
pp. 117-131 ◽  
Author(s):  
Veronika Bocsi ◽  
Hajnalka Fényes ◽  
Valéria Markos
Keyword(s):  
Higher Education ◽  
Eastern Europe ◽  
Work Values ◽  
Border Region ◽  
Voluntary Work ◽  
Central Eastern Europe ◽  
New Type ◽  
Central Eastern ◽  
Definition Of ◽  
The Relationship

In this article, the motives for voluntary work and work values in higher education contexts are examined in a cross-border region in Central Eastern Europe. Our goal is to find out what kind of relationship exists between different types of volunteering and work values among young people. In the theoretical section, we deal with the definition of volunteering in the education system, the types of and motives for students’ volunteering, and finally, the relationship between the work values and voluntary work of students. In the empirical section, we created cluster groups based on students’ motives for volunteering, and we examined differences among countries. Then we revealed the factor structure of the work values of students and analyzed the relationship between cluster groups and factors with variance analysis. Five cluster groups were identified: “careerists with postmodern features,” “unmotivated,” “highly motivated,” “volunteers in an anti-volunteering climate,” and a “helping new type volunteers” group. There were only slight differences among countries, as most respondents are characterized by mixed motivations. An interesting result is that the most frequent group is “the volunteers in an anti-volunteering climate” in all the countries examined, especially in Ukraine, so the culture of volunteering is not popular enough in this region of Central Eastern Europe. Regarding the relationship between work values and volunteering, we have found that these two fields (work values and volunteering) are closely related.

scholarly journals Groźba popełnienia przestępstwa o charakterze terrorystycznym w ujęciu art. 115 § 20 k.k. – wybrane problemy wykładni

2019 ◽  
Vol 28 (3) ◽  
pp. 41
Author(s):  
Aneta Michalska-Warias
Keyword(s):  
Criminal Law ◽  
Criminal Code ◽  
Eu Law ◽  
Terrorist Threat ◽  
Special Part ◽  
New Type ◽  
The Relationship

<p>The paper discusses the concept of a terrorist threat in the light of Article 115 § 20 of the Polish Criminal Code. The author stresses the relationship between this term and the punishable threat described in the special part of the Criminal Code. The conducted analysis leads to the conclusion that the terrorist threat must be treated as a special type of the punishable threat and, as a result, many real terrorist threats may not meet the criteria of a forbidden act, e.g. because of the lack of an individualised victim. As a result, there appear serious doubts as to whether Polish criminal law meets the requirements of EU law referring to the criminalisation of terrorist threats and, therefore, the introduction of a new type of offence of a terrorist threat and some changes in Article 115 § 20 and Article 115 § 12 of the Criminal Code have been proposed.</p>

scholarly journals On t-Neighbourhoods in Trigonometric Topological Spaces

2021 ◽  
Vol 12 (1S) ◽  
pp. 655-658
Author(s):  
S. Malathi, Et. al.
Keyword(s):  
Necessary Condition ◽  
Topological Spaces ◽  
Basic Properties ◽  
New Type ◽  
The Relationship

In this paper we introduce a new type of neighbourhoods, namely, t-neighbourhoods in trigonometric topological spaces and study their basic properties. Also, we discuss the relationship between neighbourhoods and t-neighbourhoods. Further, we give the necessary condition for t-neighbourhoods in trigonometric topological spaces.  .

scholarly journals Language in social reproduction: Sociolinguistics and sociosemiotics

2009 ◽  
Vol 37 (1/2) ◽  
pp. 43-81
Author(s):  
Patrizia Calefato
Keyword(s):  
Social Reproduction ◽  
Social Dimension ◽  
The Social ◽  
The Sixties ◽  
Roman Jakobson ◽  
New Type ◽  
General Linguistics ◽  
Definition Of ◽  
The Relationship

This paper focuses on the semiotic foundations of sociolinguistics. Starting from the definition of “sociolinguistics” given by the philosopher Adam Schaff, the paper examines in particular the notion of “critical sociolinguistics” as theorized by the Italian semiotician Ferruccio Rossi-Landi. The basis of the social dimension of language are to be found in what Rossi-Landi calls “social reproduction” which regards both verbal and non-verbal signs. Saussure’s notion of langue can be considered in this way, with reference not only to his Course of General Linguistics, but also to his Harvard Manuscripts.The paper goes on trying also to understand Roland Barthes’s provocative definition of semiology as a part of linguistics (and not vice-versa) as well as developing the notion of communication-production in this perspective. Some articles of Roman Jakobson of the sixties allow us to reflect in a manner which we now call “socio-semiotic” on the processes of transformation of the “organic” signs into signs of a new type, which articulate the relationship between organic and instrumental. In this sense, socio-linguistics is intended as being sociosemiotics, without prejudice to the fact that the reference area must be human, since semiotics also has the prerogative of referring to the world of non-human vital signs.Socio-linguistics as socio-semiotics assumes the role of a “frontier” science, in the dual sense that it is not only on the border between science of language and the anthropological and social sciences, but also that it can be constructed in a movement of continual “crossing frontiers” and of “contamination” between languages and disciplinary environments.

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