233 research outputs found

    Statistical Analysis of Landmine Fatalities in Kurdistan

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    This study analyzes mines and unexploded ordnance (UXO) victim data in the Kurdistan Region of Iraq during the period of the 1960s to 2005. In addition to descriptive analysis of the data, we use regression analysis to identify the determinants of the probability of getting killed by a mine or UXO and to estimate the determinants impacts. The rates of killed and injured victims are explained using a set of socioeconomic variables. Since the data is repeated cross sections in which individuals are observed when they are subjected to accident and in order to account for the dynamic aspect of the process and heterogeneity by location, we create pseudo panel data where districts are observed over the entire study period forming almost a balanced panel data. This allows for analysis of both heterogeneity and dynamics across locations and over time, as well as to control for unobserved location and time effects. The result can be useful in planning, monitoring, and resource allocation for mine action and labor market programmes and rehabilitation activities.landmine, unexploded ordinance, pseudo panel data, security and war, rehabilitation, Kurdistan

    Statistical analysis of landmine fatalities in Kurdistan

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    This study analyzes mines and unexploded ordnance (UXO) victim data in the Kurdistan Region of Iraq during the period of the 1960s to 2005. In addition to descriptive analysis of the data, we use regression analysis to identify the determinants of the probability of getting killed by a mine or UXO and to estimate the determinants impacts. The rates of killed and injured victims are explained using a set of socioeconomic variables. Since the data is repeated cross sections in which individuals are observed when they are subjected to accident and in order to account for the dynamic aspect of the process and heterogeneity by location, we create pseudo panel data where districts are observed over the entire study period forming almost a balanced panel data. This allows for analysis of both heterogeneity and dynamics across locations and over time, as well as to control for unobserved location and time effects. The result can be useful in planning, monitoring, and resource allocation for mine action and labor market programmes and rehabilitation activities

    Applying the Canonical Text Services Model to the Coptic SCRIPTORIUM

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    Coptic SCRIPTORIUM is a platform for interdisciplinary and computational research in Coptic texts and linguistics. The purpose of this project was to research and implement a system of stable identification for the texts and linguistic data objects in Coptic SCRIPTORIUM to facilitate their citation and reuse. We began the project with a preferred solution, the Canonical Text Services URN model, which we validated for suitability for the corpus and compared it to other approaches, including HTTP URLs and Handles. The process of applying the CTS model to Coptic SCRIPTORIUM required an in-depth analysis that took into account the domain-specific scholarly research and citation practices, the structure of the textual data, and the data management workflow

    Production risk, energy use efficiency and productivity of Korean industries

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    Korea imports all of its primary energy, which leads to high dependency and vulnerability related to its energy supply. Efficiency in the use of energy is a way to reduce dependency and emissions. This study provides empirical results of the stochastic production process in energy use. Special attention is given to the factors that increase the risk or variation of using more of the energy input in production. A dynamic panel model is specified and applied to 25 Korean industrial sectors over the period 1970-2007. The determinants of energy use are identified and their effects in the form of elasticities of energy use are estimated. Stochastic production technology is applied to estimate an energy demand model based on an inverted factor demand. The findings reveal that: first, there are large variations in the degree of overuse or inefficiency in energy use among the individual industries as well as over time; second, information and communication technology (ICT) capital and labor are substituting for energy; and third, ICT capital input decreases the variability of energy demand while non-ICT capital, material and labor increase the variability of energy demand. The results suggest that technical progress contributes more to the increase in the mean energy demand than to the reduction in the level of risk. It is recommended that industries increase their level of ICT capital as well as digitalize and invest more in R&D activities and value added services to reduce the uncertainty related to their demand for energy

    How ICT investment and energy use influence the productivity of Korean industries

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    This empirical study examines changes in industrial productivity in Korea between 1980 and 2009, focusing on how investment in information and communication technology (ICT) and energy use, influence productivity levels. A dynamic factor demand model is applied in order to link inter-temporal production decisions by explicitly recognizing that the level of certain factors of production cannot be changed without incurring so-called adjustment costs, defined in terms of forgone output from current production. In particular, we investigate how the ICT–energy relationship affects total factor productivity growth in 30 industrial sectors. Describing industry-specific productivity levels is important for policymakers when the allocation of public investment and support is limited. The results presented herein show that ICT/non-ICT capital investment are substitutes for labor and energy use. We also find a high output growth rate in the sampled sectors, and increasing returns to scale, whose effects on the TFP component are higher than those of technological progress

    CONTRIBUTION OF COORDINATION, BALANCE, FLEXIBILITY, ARM MUSCLE STRENGTH TO THE 'KIZAMI-GYAKU ZUKI' PUNCH: ANALYSIS OF FEMALE KARATE ATHLETES

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    The purpose of this research is to analyze the contribution of coordination, balance, flexibility, arm muscle strength to the kizami-gyaku zuki punch of female athletes. The background to this research is from observations of the qualifying round at the 2023 National Sports Week (PON), on average female athletes earn points from punches. This research is an analytical survey to test the contribution of the independent variables. The sample was 50 female athletes with characteristics namely age 19.8±1.2 years, training experience 8.3±0.6 years, weight 50±1.5 kg, height 160.4±1.5 cm. The tests carried out included coordination using the Hand-Wall Toss Test, balance using the Modified Bass Test of Dynamic Balance, flexibility using the sit and reach test, arm muscle strength using push up for 1 minute, kizami-gyaku zuki punches using a punching bag during 30 seconds. The results of this research show that coordination, flexibility, and arm muscle strength have an effect on kizami-gyaku zuki punches. However, balance has no effect on the kizami-gyaku zuki punches. Adjusted R Square results, the contribution from coordination (r = 0.341) or 34.1%, balance (r = 0.235) or 23.5%, flexibility (r = 0.490) or 49%, arm muscle strength (r = 0.465) or 46.5%, contribution overall against kizami-gyaku zuki punch (r = 0.674) or 67.4%. The conclusion is that it is important for trainers, athletes, and sports karate academics to focus on these four physical components so that the kumite abilities of female athletes can be improved. However, it is important to train in other physical components, such as endurance, technique and tactics and mental. Future research is expected to add variables or update the types of tests used in this research.  Article visualizations

    Spin rotation for ballistic electron transmission induced by spin-orbit interaction

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    We study spin dependent electron transmission through one- and two-dimensional curved waveguides and quantum dots with account of spin-orbit interaction. We prove that for a transmission through arbitrary structure there is no spin polarization provided that electron transmits in isolated energy subband and only two leads are attached to the structure. In particular there is no spin polarization in the one-dimensional wire for which spin dependent solution is found analytically. The solution demonstrates spin evolution as dependent on a length of wire. Numerical solution for transmission of electrons through the two-dimensional curved waveguides coincides with the solution for the one-dimensional wire if the energy of electron is within the first energy subband. In the vicinity of edges of the energy subbands there are sharp anomalies of spin flipping.Comment: 9 oages, 7 figure

    S-matrix theory for transmission through billiards in tight-binding approach

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    In the tight-binding approximation we consider multi-channel transmission through a billiard coupled to leads. Following Dittes we derive the coupling matrix, the scattering matrix and the effective Hamiltonian, but take into account the energy restriction of the conductance band. The complex eigenvalues of the effective Hamiltonian define the poles of the scattering matrix. For some simple cases, we present exact values for the poles. We derive also the condition for the appearance of double poles.Comment: 29 pages, 9 figures, submitted to J. Phys. A: Math. and Ge
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