Science topic

Production Theory - Science topic

Explore the latest publications in Production Theory, and find Production Theory experts.
Filters
All publications are displayed by default. Use this filter to view only publications with full-texts.
Publications related to Production Theory (1,844)
Sorted by most recent
Article
Full-text available
Rural mutual pension mode is the current rural endowment problem increasingly prominent; pension problems such as insufficient resources grew out of a new type of pension mode. Diversification of it has low cost, etc. The article will benefit mutual production theory is introduced into the support problem. Through exploring mutual benefits producti...
Article
Full-text available
Cavitation is a challenging flow phenomenon that can adversely affect the hydraulic performance of centrifugal pumps. In this study, numerical investigations were carried out incorporating the Zwart cavitation model derived from Rayleigh–Plesset equation with the Navier–Stokes equations to study a damaged turbofan pump. Pressure fluctuation was ana...
Article
Full-text available
An implication of a turbine current is the development of a wake, a reduced speed flow, thus affecting the performance of an adjoined turbine. The aim of this study is to examine the turbine wake properties to offer a basic framework for the exploration of efficient turbine arrangements through the OpenFOAM source package and the entropy production t...
Article
Full-text available
LOT wireless sensor nodes are limited by physical factors, usually have weak computing power and endurance, and wireless communication methods are very vulnerable to information theft. Therefore, it is of great significance to ensure the safe and efficient transmission of images in new application scenarios. In view of the need for an efficient ima...
Article
Full-text available
Unlabelled: One of the four pillars of democracy in India is the judiciary, which in the recent past has experienced the 'cyclic syndrome' of arrears. There are 3.5 crore cases pending in the Indian judicial system that has a bearing on contract enforcement. A burgeoning stream of literature has reported the role of the judiciary in economic growt...
Article
Full-text available
In order to study the influence of different law of guide vane angle on performance of reactor coolant pump (RCP), five models of RCP with different guide vane were designed, and the three‐dimensional numerical calculation was carried out. Based on the entropy production theory, analysis of flow loss at part‐load, design and over‐load flow rate was...
Article
Full-text available
Resumo O objetivo deste texto é analisar dados qualitativos dos espaços representacionais das Ocupações Urbanas (OUs) Carolina Maria de Jesus e Nova Canudos, realizadas no primeiro semestre de 2021 pelo Movimento dos Trabalhadores Sem Teto na periferia do município de São Paulo. O conceito de “espaços representacionais” é parte da teoria da produçã...
Article
Full-text available
This article explores in detail the reactions among American economists to John Bates Clark's famously controversial claim that the marginal productivity theory of factor pricing and distribution is necessarily just. The general debate around Clark's “naïve productivity ethics,” as George Stigler sharply called it, transcended the then existing dis...
Article
Full-text available
A school's infrastructure reflects its curriculum and co-curricular activities. Using constructivism and production theory, the study examined how school infrastructure affects academic achievement in four Ghanaian senior high schools. The study obtained data using interviews and questionnaires. The survey revealed that schools required sports fiel...
Article
Full-text available
In spite of its universalist claims, a global perspective on digital humanities (DH) should be regarded with cautiousness because the local contexts develop according to a different logic, involving (not always progressively) theoretical exposure, methodological acclimatization, and individual appropriation. After sketching a brief history of the f...
Article
Full-text available
Multi-stage pump as turbine (PAT) has a wider range of heads and application intervals compared to single-stage PAT. In our research, we have conducted experimental and numerical simulation studies on this issue. In this paper, based on experimental research, numerical simulation is applied to calculate the multi-stage PAT flow field. The flow char...
Preprint
Full-text available
The classical theory of production is based on the unrealistic assumption of perfect rationality, under which firms maximize profits in all situations. In contrast, under conditions of risk and bounded rationality, firms may make decisions based on behavioral rule of thumb. However, we have little insight into how a firm’s decision resulting from r...
Article
Full-text available
Water wheels used for power generation are applied to tailwater and ultra-low head sites. In this research, the VOF method and the standard k-ε turbulence model are utilized to predict the performance and transient flow fields of water wheels. The numerical results show a reasonable agreement with the experimental data. This work aims at improving...
Article
Full-text available
O conceito de terroir, traduzido como “gut da terre”, tem sido debatido nas esferas da teoria da produção agrícola tradicional versus globalização da agricultura. Sem uma tradução clara, sua origem é antiga, mas consolidada na França, especificamente na viticultura e traz muitas questões quando aplicado a outras culturas. O artigo busca nas refrênc...
Article
Full-text available
In the present work, unsteady flow solved by the Reynolds time-averaged Navier–Stokes equation was investigated to determine the inflow distortion mechanism and the spatial distribution of hydraulic loss in a bidirectional axial flow pumping station (Case 1) based on the entropy production theory. A laboratory-scale performance experiment was also...
Article
Full-text available
In production theory and engineering, a topic of interest is the determination of technical efficiency of firms from the estimation of a technology. By definition, a technology must satisfy a set of micro-economic postulates. Likewise, a valid estimator of a technology should meet the same set of axioms. In this paper, for the first time, we adapt...
Article
Full-text available
Promoting the social integration of ecological migrants and identifying the key constraints to their integration are significant issues for social governance and transformation. Most previous studies have not systematically analyzed the level of social integration of migrants from the perspective of spatial ternary dialectics or systematically anal...
Article
Full-text available
Inside the pump-turbine, energy is irreversibly lost due to turbulent pulsations in the high Reynolds number zone and actions of viscous forces close to the wall. The conventional differential pressure method cannot obtain specific details of the hydraulic loss within the machine’s flow passages; on the other hand, the entropy production method can...
Article
Full-text available
El artículo analiza representaciones de la frontera México-Estados Unidos sistematizadas en un corpus de 1119 artículos, publicados por 9 medios -entre 2016 y 2020-, sobre la inmigración de miles de personas haitianas que buscaban refugio. El abordaje de los materiales articula las teorías de la producción social de comunicación y las representacio...
Article
Full-text available
To broaden the efficient operating zone and increase the energy efficiency of a multi-stage double-suction centrifugal pump, a multi-component and multi-condition optimization design method involving high-precision performance predictions, a flow loss visualization technique based on entropy production theory, and machine learning is proposed. Firs...
Preprint
Full-text available
Production efficiency across sectors of the economy is now a main point of discussion due to the growing threat of food insecurity soon. This study focused on determining the level of technical efficiency (TE) and its corresponding common factors across all crops grown by Tanzanian smallholder farmers by employing a single-step stochastic frontier...
Article
Full-text available
With the aim of investigating the influence of guide vane meridians on the external characteristics and internal flow field of the mixed-flow pump device, this research constructed seven guide vane meridians and applied computational fluid dynamic (CFD) and entropy production theory to investigate the spread of hydraulic loss in a mixed-flow pump....
Article
Full-text available
In this paper, a seven-stage high pressure centrifugal pump for water injection was taken as the research object. The steady state full flow field was numerically simulated by unstructured grid and Renormalization Group (RNG) k- ε turbulence model, and the results were verified by experiment. The flow characteristics of each flow passage component...
Article
Full-text available
A non-uniform velocity profile occurs at the inlet of a coastal axial-flow pump which is placed downstream of the forebay with side-intake. As a result, the actual efficiency and head of the pump is dissimilar to the design parameters, and the lack of the theoretical investigation on the relationship between inflow distortion and energy losses rest...
Conference Paper
Full-text available
Küreselleşme, üretim miktarı artışına (ölçek etkisi), teknolojik gelişmeye (teknolojik etki), üretim ve tüketim faaliyetlerinde bileşim ve konum kaymalarına (yapısal etki), farklı ürün bileşenlerinin üretimine ve tüketimine (ürün etkisi) yol açmaktadır. Bununla birlikte sanayileşme, kentleşme, teknoloji, nüfus artışı gibi ekonomik ve sosyal faaliye...
Preprint
Full-text available
Production theory, defined as the study of the economic process of transforming inputs into outputs, consists of two simultaneous economic forces: cost minimization and profit maximization. The cost minimization problem involves deriving conditional factor demand functions and the cost function. The profit maximization problem involves deriving the...
Preprint
Full-text available
Duality is the heart of advanced microeconomics. It exists everywhere throughout advanced microeconomics, from the beginning of consumer theory to the end of production theory. The complex, circular relationships among various theoretical microeconomic concepts involved in the setting of duality theory have led it to be called the "wheel of pain" b...
Article
Full-text available
A regulating valve is a key control element in the coal liquefaction industry, whose flow field distribution is related to the entropy production. In order to make a quantitative evaluation of the energy loss in the cavitation flow and calculate the magnitude and location of the hydraulic loss in the flow field more accurately, entropy production t...
Article
Full-text available
A bstract We systemically study the Hecke relations and the c = 8 k coset relations among 2d rational conformal field theories (RCFTs) with up to seven characters. We propose that the characters of any 2d RCFT — unitary or non-unitary — satisfying a holomorphic modular linear differential equation (MLDE) can be realized as either a Hecke image or t...
Article
Full-text available
Low-head vertical axial-flow pump as turbine (PAT) devices play a vital part in the development of clean energy for hydropower in plain areas. The traditional method of evaluating the flow loss in hydraulic machinery is calculated by the pressure drop method, the limitation of which is that the location of the occurrence of large losses cannot be a...
Thesis
Full-text available
This dissertation addresses the perception and production of American English monophthongs by Palestinian Arabic (PA) learners of English as a Foreign Language (EFL). It aims to identify (and predict) areas of difficulty in the perception and production of these sounds of American English (AE) within a framework of the most influential L2 perceptio...
Article
Full-text available
Pumped-storage hydropower (PSH) stations are an efficient emission-free technology to balance renewable energy generation instabilities. The pump-turbine is a core component of PSH stations requiring frequent start-up, shutdown, and working conditions for regulation tasks, making it prone to instabilities. Based on entropy production theory and vor...
Article
Full-text available
Propõe-se o estudo das semioses engendradas pelas minorias como atos de comunicação. Tal perspectiva, ao impor a primazia dos processos de comunicação sobre os sistemas de significação, desloca o foco das teorias dos códigos para as teorias da produção sígnica, aqui abordadas do ponto de vista das dispersões que produzem em relação à cultura das mí...
Article
Full-text available
Marginal productivity theory of labour proposes that employees as well as managers should be rewarded in relation to their performance. Likewise, appropriate compensation could serve as potent incentive to managers for enhanced corporate profitability. Ideally, there should be adjustments in the managers’ remuneration in accordance to level of prof...
Article
Full-text available
In the process of choosing the best scheme in the artificial intelligence algorithm, it is impossible to accurately judge the nonlinear relationship between the innovation strategy and the film and television postproduction scheme. An improved artificial intelligence algorithm based on the integration of dynamic factors and the artificial intellige...
Article
Full-text available
Biased technological progress is the act of energy conservation and emission reduction by changing the marginal rate of substitution. In this study, we introduced renewable energy into a production function, and proposed a method of identifying biased characteristics of technological progress, based on marginal productivity theory. A panel dataset...
Article
Full-text available
In production theory, industrial units do business in such a way that they use minimum amount of resources to produce maximum amount of products. So, inefficient units decrease their inputs level and increase their outputs level to meet the efficient frontier. By changing inputs and outputs, achieving an optimal scale size (OSS) in industrial units...
Presentation
Full-text available
Courses Training supported by LARI AUST DRC ///// Nursery Plants (Theory & Practice): Ihab Jemaa - Sleiman Skaf ///// Irrigation Methods and Drip Irrigation (Theory & Practice): Ihab Jemaa- Sleiman Skaf ///// Technics of Vegetables Production (Theory & Practice): Randa Masaad ///// Plants Protection (Theory & Practice): Elia Chweiri ///// Lan...
Article
Full-text available
The “efficiency-distribution” model introduced by Houthakker in 1955 offers a flexible approach to production theory that does not require the measurement of capital and other fixed assets. Thus it avoids the theoretical problems associated with the Cambridge controversies and with Franklin Fisher’s critiques of aggregation. The efficiency distribu...
Article
Full-text available
For multi-phase batch processes with different dimensions whose dynamics can be described as a linear discrete-time-invariant system in each phase, a data-driven optimal ILC was explored using multi-operation input and output data that subordinate a tracking performance criterion. An iterative learning identification was constructed to estimate the...
Article
Full-text available
Melaka’s rice industry exhibited a slightly poor performance between 1988 and 2019. The paddy parcel area has decreased from 10,418 ha to 1,837 ha in 32 years. Between 1988 and 2015, the crop intensity factor (CIF) was below 50%. Thus, this research will examine the trend of paddy yield and rice productivity in Melaka from 1988 to 2019 and estimate...
Article
Full-text available
In everyday life human life is not independent of physical elements. Among the physical phenomena we can encounter is the creation of energy shut up. In the fabric here there are several roles like electrons, atoms, Photons, and so on. In modern physics, it is called as pair production theory. This phenomenon only happens in light with high speeds,...
Preprint
Full-text available
We systemically study the Hecke relations and the $c=8k$ coset relations among 2d rational conformal field theories (RCFTs) with up to seven characters. We propose that the characters of any 2d RCFT -- unitary or non-unitary -- satisfying a holomorphic modular linear differential equation (MLDE) can be realized as either a Hecke image or the coset...
Article
Full-text available
The use of existing large pumping station equipment for upstream residual water reverse power generation is an unrealized yet valuable renewable energy project. At present, some large axial flow pump stations have begun to perform reverse power generation operations; however, related research has not yet started. In this paper, entropy generation t...
Article
Full-text available
The phenomenon of delivering messages through mural art occurs in the social life of the Indonesian people, and is used as a medium for social criticism in the public sphere. The purpose of this study is to find the meaning of social criticism that is carried out through the media of mural art and to find the shift in values that occurs in mural ar...
Article
Full-text available
The decomposition analysis has been employed to discover the driving factors of carbon emission intensity, but the current studies assume that production functions are under the condition of the neutral technical change. Grounded on biased technical change production theory, this paper proposes a novel multidimensional decomposition approach which...
Article
Full-text available
The general objective of this research was to describe the product and process models of writing and their pedagogical practices. This research was developed from the qualitative approach, using several bibliographic sources in order to obtain real information and to be able to reach the stated objective. In addition, the following methods were use...
Article
Full-text available
The focus of red tape research so far, has been on public organizations, their organizational rules, and on managers’ perceptions of red tape. In the literature, it is suggested that red tape research should focus more on red tape that can be considered as existing objectively and on the compliance burdens of stakeholders such as businesses and cit...
Article
Full-text available
The L-subshell ionization mechanism is studied in an ultra-thin Os target bombarded by 4-6 MeV/u fluorine ions. Multiple ionization effects are considered through the change of fluorescence and Coster-Kronig yields while determining L-subshell ionization cross sections from L X-ray production cross sections. The present experimental values are comp...
Article
Full-text available
In this paper, H company vacuum pump V8 products as the research object, combined with lean production theory and value stream diagram analysis method to identify the key waste problems in the production system; and from the production line balance, facility layout optimization, work in process inventory lean and other aspects of the improvement pl...
Article
Full-text available
In this paper, an optimization design of the vertical centrifugal pump with vaned diffuser was accomplished, and analyzed the internal flow pattern of the model before and after optimization under stall conditions to explore the relationship between design parameters and the stall characteristics. The reasons for the improvement of efficiency and h...
Article
Full-text available
A bstract We investigate orthosymplectic quivers that take the shape of D -type and B -type Dynkin diagrams. The D -type orthosymplectic quivers explored here contain a balanced “fork”, i.e. a balanced subquiver with a D -type bifurcation, whereas the B -type orthosymplectic quivers are obtained by folding the D -type quivers. The Coulomb branches...
Article
Full-text available
Objectives The ultimate goal of the New Rural Cooperative Medical Scheme (NRCMS) is to improve physical and psychological health and aim to provide equitable, affordable, cost-effective healthcare services for all rural people. One of our major concerns from the perspective of policy outcome is whether middle-aged and elderly can benefit from the i...
Conference Paper
Full-text available
Technological constraints on the combinations of production factors result in new conditions for economic equilibrium: output elasticities must be equal to a modification of the usual factor cost shares, where shadow prices due to the constraints add to factor prices. The shadow prices depend on the output elasticities. Consequently, output elas-ti...
Preprint
Full-text available
Most people agree that human activities are consistent with physical laws. One may naturally think that sensible economic theories can be derived from physical laws and evolutionary principles. This is indeed the case. In this paper, we present a newly developed production theory of economics from biophysical principles. The theory is a compact ana...
Article
Full-text available
The educational productivity theory directed that students’ variables affect their performance. Therefore, this descriptive correlational study was designed to examine students’ interpersonal skills and its association with their achievement. 3200 (both boys and girls) high school students participated in this study, selected from 80 high schools o...
Article
Full-text available
تئوری طراحی، هسته معرفتی و دانش شناسانه در فرایند طراحی، و بن‌مایه هویت‌بخش آن است. درک این تئوری به صورتی که به فلسفه علم انسان معاصر نزدیک باشد، باعث می‌گردد که مسئله تعریف و استفاده از دستاوردهای علمی سایر رشته‌های مرتبط به معماری، در کنار سایر منابع درون رشته‌ای مطرح گردد. نکته مهم در این باره، داشتن الگویی است که بتواند بر پیچیدگی‌های ناشی از...
Article
Full-text available
As important parts of underground water conveyance equipment, diving tubular pumps are widely used in various fields related to the national economy. Research and development of submersible pumps with better performance have become green goals that need to be achieved urgently in low-carbon development. This paper provides an effective approach for...
Article
Full-text available
The vortex rope in the draft tube is considered as the major contributor to pressure pulsation at partial load (PL) conditions, which causes the hydro unit to operate unstably. Based on the prototype Francis turbine HLA551-LJ-43 in the laboratory, J-grooves are designed on its conical section in this paper. We used numerical simulation to study the...
Article
Full-text available
Using A-share listed companies in Shanghai and Shenzhen from 2008 to 2020 as the original sample, this paper focuses on the impact of M&A goodwill and on the total factor productivity of firms, so as to gain an in-depth understanding of the profound effect of M&A goodwill on firms. The main findings of this paper are: (1) M&A goodwill is negatively...
Article
Full-text available
The research is mainly based on the electricity consumption information of 800 key energy-consuming enterprises. By cleaning and sorting the data, high-frequency structured electricity consumption data is obtained, which is based on the production theory in economics. Using complex network models and Hidden Markov Algorithm constructs an industry p...
Article
Full-text available
In order to solve the problems of large reflux and low output performance of the valveless piezoelectric pump with conical tubes, the valveless piezoelectric pump with hyperbolic tubes was proposed. However, the previous research only paid attention to the difference of forward and reverse flow resistance inside the tubes. For this reason, the prot...
Article
Full-text available
This article deals with an economic production quantity (EPQ) model with deterioration under the effect of environmental pollution in fuzzy environment. First of all, we develop a pollution generation (PG) model with the help of existing initial pollution status of the environment, and then we use it as an essential constraint in the proposed EPQ m...
Article
Full-text available
Marginal productivity theory of labour proposes that employees as well as managers should be rewarded in relation to their performance. Likewise, appropriate compensation could serve as potent incentive to managers for enhanced corporate profitability. Ideally, there should be adjustments in the managers' remuneration in accordance to level of prof...
Article
Full-text available
While there are existing empirical reviews regarding the relation between knowledge workers (KW) and knowledge transfer (KT), no study has examined the association of automation and knowledge transfer. The study describes knowledge workers as employees embedded with special abilities and having the main role of transfering their abilities to other...
Thesis
Full-text available
In this scientific work, the theory of production and the state of producer equilibrium are analyzed. In addition, this research paper examines the structure of industry in Uzbekistan and its production sector.
Article
Full-text available
Slanted axial-flow pump devices are widely applied in urban water supply, irrigation and drainage engineering fields. The second law of thermodynamics is applied to investigate the flow loss characteristics of the 30° slanted axial-flow pump model according to the flow loss analysis method of entropy production theory, so that the hydraulic loss ch...
Method
Full-text available
La compréhension des principes économiques est la base d’une meilleure gestion des exploitations agricoles. Il est donc nécessaire de baser la méthode de gestion sur les sciences économiques dans toute la mesure du possible. L’exploitant agricole doit tenir compte des prix pour orienter ses choix. La théorie de la production agricole fournit des s...
Article
Full-text available
Facing the new form and situation of the Huaihe Economic Zone, it is of great significance to analyze the sources of growth and the intrinsic mechanism of the green total factor productivity of its economic-ecological system, to grasp the spatial and temporal characteristics of green total factor productivity, and to study the influence of each fac...
Article
Full-text available
El mercado externo resulta crucial para el crecimiento competitivo del sector lácteo argentino. Con una demanda mundial cambiante, el sector ha logrado adaptarse e insertarse en nuevos mercados, aunque con un desempeño competitivo muy volátil. Dada la relevancia de estas condiciones de demanda para la competitividad del sector, en el presente traba...
Article
Full-text available
Today, production problems are complex. The majority of production activities lead to unmoral judgment. This condition is dominated by the thinking of a capitalist and socialist economic system. The focus of the production theory of Muslim thinkers studied is Al-Ghazali, but it is juxtaposed with the perspectives of other Muslim thinkers, namely Ib...
Article
Full-text available
Contextual factors have been identified as greatly influencing students’ reading performance. However, the collaborative influence of key contextual factors on students’ reading performance is still elusive and warrants further exploration. Based on Walberg’s educational productivity theory and Bronfenbrenner’s ecological system theory, emphasizing...