736,899 research outputs found

    Shear resistance of backfill components' interfaces in nuclear waste deposition tunnels

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    The purpose of the study was to investigate the shear strength behaviour of the interface of tunnel backfilling components in nuclear waste deposition tunnels. The studied disposal concept in this project is the KBS-3V, where the holes are drilled vertically into the bedrock from the deposition tunnel floor. The waste deposition tunnels will be excavated into an approximate depth of 420 m. The determined shear strength parameters will be used in the numerical modelling of the buffer/ backfill interactions. The analysis of the results can also be used in the reliability evaluation of the modelling results. In this case, the tested backfill materials were Friedland clay as block material, bentonite pellets, mixtures of granulated bentonite and crushed rock as foundation bed material and granite stones. Investigated granite stones were classified to three different types depending on their surface roughness. The followed test method was direct shear box test using large scale equipment. The side dimension of the square test box was 300 mm. A large testing program of 26 shear box tests was carried out in the laboratory of Soil Mechanics and Foundation Engineering. Seven different interfaces were tested: block / block, block / pellets, block / granulated bentonite, block / foundation bed material, smooth stone / pellets, intermediate roughness stone / pellets and rough stone / pellets. Calculations of some material properties (bulk density, dry density, water content, grain distribution) were also implemented. On the basis of the shear box tests made, it seems that the interface between granite stone and bentonite pellets have the highest value for friction angle. The interface between blocks got the lowest friction angle. The obtained values for the strength parameters in the interfaces block / granulated bentonite and block / foundation material are quite similar. Moreover, not important differences can be observed in the smooth and intermediate roughness granite stone

    Traducción, adaptación cultural y validación del ABILHAND-Kids para el portugués brasileño

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    This study aimed to translate, to adapt cross-culturally and to validate the ABILHAND-Kids for the Brazilian Portuguese. ABILHAND-Kids was translated to Brazilian Portuguese and translated back by two certified translators in each phase. After the expert committee approval, the pre-test version was applied in 40 parents of children with cerebral palsy in order to verify item comprehension. Twenty-one volunteers were enrolled in the psychometric properties analysis. Reproducibility was verified by interrater and intrarater reliability and the validity was tested by investigating Box and Block Test, Purdue Pegboard Test and grip strength correlations. ABILHAND-Kids showed strong intrarater (ICC=0.91) and interrater (ICC=0.97) reliability and high internal consistency (Cronbach’s alfa: 0.99). ABILHAND-Kids showed significant correlations with Box and Block Test (performed by dominant upper extremity), Purdue Pegboard Test and grip strength. The Brazilian Portuguese version of ABILHAND-Kids is a reliable tool to measure upper extremities function of children with cerebral palsy, based on the perception of their parents.El objectivo de este estudio fue traducir el ABILHAND-Kids para el portugués brasileño, adaptar culturalmente y verificar su validez y confiabilidad. El ABILHAND-Kids fue traducido para el portugués y la traducción reversa fue hecha por dos traductores independientes en cada fase. Después de aprobación del comité, la versión pré-prueba fue aplicada en 40 voluntarios con hijos presentando parálisis cerebral para verificar la comprehensión de los ítems. Participaron del análisis de las propriedades psicométricas 21 voluntarios. La reproducibilidad fue verificada por análisis de confiabilidad intra y interevaluador y validez por correlación con el Box and Block Test, el Purdue Pegboard Test y la fuerza de prensión manual. El ABILHAND-Kids demonstró alta confiabilidad intra (ICC=0,91) y interevaluadora (ICC=0,97), y alta consistencia interna (Alfa de Cronbach: 0.99). El ABILHAND-Kids presentó correlación significativa con el Box and Block Test (realizado por el miembro superior dominante), el Purdue Pegboard Test y la fuerza de prensión. La versión brasileña del ABILHANDKids es válida y confiable para evaluar la función de miembros superiores en niños con parálisis cerebral basado en la percepción de sus padres.O objetivo deste estudo foi traduzir o ABILHAND-Kids para o português brasileiro, adaptá-lo culturalmente e verificar sua validade e confiabilidade. O ABILHAND-Kids foi traduzido para o português e a tradução reversa foi feita por dois tradutores independentes em cada fase. Após a aprovação do comitê, a versão pré-teste foi aplicada em 40 voluntários com filhos com paralisia cerebral para verificar a compreensão dos itens. Participaram da análise das propriedades psicométricas 21 voluntários. A reprodutibilidade foi verificada por análise da confiabilidade intra e interavaliador e a validade pela correlação com o Box and Block Test, Purdue Pegboard Test e força de preensão manual. O ABILHAND-Kids demonstrou alta confiabilidade intra-avaliador (ICC=0,91) e interavaliador (ICC=0,97) e alta consistência interna (Alfa de Cronbach: 0,99). O ABILHAND-Kids apresentou correlação significativa com Box and Block Test (realizado pelo membro superior dominante), com o Purdue Pegboard Test and a força de preensão. A versão brasileira do ABILHANDkids é válida e confiável para avaliar a função de membros superiores em crianças com Paralisia Cerebral, com base na percepção de seus pais


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    AbstrakTujuanl penelitianl inil adalahl untukl mengetahuil pengaruhl latihanl jump to box terhadapl kemampuanl lompatan block padal permainanl bolal voli putra tin B Desa Harapan. Hipotesis tindakan dalam penelitian ini adalahl terdapatl pengaruhl latihanl jump to box terhadapl kemampuanl lompatanl block padal permainan bola voli putra Tim B Desa Harapan. Denganl jenisl desainl yangl digunakanl adalahl onel group pretestl and posttestl design.Berdasarkanl hasill pengujianl yang telahl dilakukanl dapatl diketahuil pula seluruhl variabell memilikil populasil yang homogenl dan memilikil populasil yang berdistribusil normal. Hasill pengujianl tes awall dan tes akhirl denganl menggunakanl uji t menunjukanl hasill Thitung sebesar 9,597 sedangkanl nilai Ttabell sebesarl 1,796. Ternyatal nilai Thitungl lebih besarl dari nilai Ttabel, sehinggal Thitungl telahl beradal di luarl daerahl penerimaanl Ho. Jadil dapatl disimpulkan bahwal terdapatl pengaruhl latihan jumpl to box terhadapl kemampuanl lompatan block pada permainan bola voli putra Tim B Desa Harapan.Dalam penerapan latihanl jump to box pada peningkatan kemampuan lompatan block pada permainan bola voli sangat memberikan pengaruh. Sehingga dapatl disimpulkanl bahwal latihanl jump to box memiliki pengaruhl yangl signifikan pada kemampuan lompatan block pada permainan bola voli.Kata Kunci: Jump To Box1, Block2, Permainan Bola Voli3 AbstractThe aim of this research is to determine the effect of jump to box training on the blocking jump ability in male volleyball players of Team B, Harapan Village. The research action hypothesis in this study is that there is an effect of jump to box training on the blocking jump ability in male volleyball players of Team B, Harapan Village. The research design used was a one-group pretest and posttest design.Based on the test results conducted, it can be determined that all variables had a homogeneous population and a normally distributed population. The results of the initial and final tests using the t-test showed a calculated t-value of 9.597, while the t-table was 1.796. It turned out that the calculated t-value was greater than the t-table, indicating that the calculated t-value fell outside the region of acceptance of the null hypothesis (Ho). Therefore, it can be concluded that there is an influence of jump to box training on the blocking jump ability in male volleyball players of Team B, Harapan Village.The implementation of jump to box training has a significant impact on improving blocking jump ability in volleyball. Thus, it can be concluded that jump to box training has a significant influence on the blocking jump ability in volleyballKeywords: Jump To Box1, Block2, Volleyball Game3

    Box and block test in Beninese adults

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    The Advanced Encryption Standard or better known as the AES Algorithm is a standard algorithm and has been widely used as an application of cryptography. Currently, a lot of research is developing about attacks on the AES algorithm. Therefore, there have been many studies related to modifications to the AES algorithm with the aim of increasing the security of the algorithm and to produce alternatives to encryption algorithms that can be used to secure data. In this study, modifications were made to the AES algorithm by replacing the S-box using the perfect SAC S-box in the SubBytes process. The Perfect SAC S-box has an exact SAC average value of 0.5. The S-box that will be used must have good security strength, therefore the perfect SAC S-box is tested, namely the AC, SAC, BIC, XOR Table Distribution, and LAT Distribution tests. Based on the results of the study, it was found that the perfect SAC S-box had almost the same S-box test results as the AES S-box. Furthermore, after the perfect SAC S-box is applied to the AES algorithm, it is analyzed how the effect of these modifications on the AES algorithm uses randomness testing for the block cipher algorithm, namely the strict avalanche criterion (SAC) test. The results of the AES test with perfect SAC S-box can meet the SAC test since the second round with better results than the original AES algorithm with SAC values of 0.5003 and 0.5019

    A Strategy for Automatic Quality Signing and Verification Processes for Hardware and Software Testing

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    We propose a novel strategy to optimize the test suite required for testing both hardware and software in a production line. Here, the strategy is based on two processes: Quality Signing Process and Quality Verification Process, respectively. Unlike earlier work, the proposed strategy is based on integration of black box and white box techniques in order to derive an optimum test suite during the Quality Signing Process. In this case, the generated optimal test suite significantly improves the Quality Verification Process. Considering both processes, the novelty of the proposed strategy is the fact that the optimization and reduction of test suite is performed by selecting only mutant killing test cases from cumulating t-way test cases. As such, the proposed strategy can potentially enhance the quality of product with minimal cost in terms of overall resource usage and time execution. As a case study, this paper describes the step-by-step application of the strategy for testing a 4-bit Magnitude Comparator Integrated Circuits in a production line. Comparatively, our result demonstrates that the proposed strategy outperforms the traditional block partitioning strategy with the mutant score of 100% to 90%, respectively, with the same number of test cases

    The Evaluation of the Parallel Bond’s Properties in DEM Modeling of Soils

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    In this study we conducted the sensitivity analysis of the parallel bond used in the discrete element method (DEM, 3D) based soil model. We researched those parameters which simulate real soil physique attributes. In our investigations we modeled the inhomogeneity by the differentiation in particle size, the soil moisture condition by the parallel bond’s radius R, the cracking tendency by the bonding stiffnesses kn, ks and the air phase by the pore volume of the particle block. We based the validation of the simulation on the results of the simple direct shear box test which were performed in laboratory environment. We analyzed the effect of micromechanical and macromechanical parameters, used in the modeled particle block, with the use of direct shear box and triaxial shear simulations. After the recalculation of micromechanical parameters (EC, ĒC, γ) we analyzed the effect of the adjustable macromechanical parameters (kn, ks ,λ, kn, ks, σC, τC) used in the block with triaxial shear simulation. Based on the comparison of the shear simulations’ results the accuracy of the recalculation of the parallel bond’s micro-macro parameters is proved by the good correlation of the Coulomb failure criterion lines (σ-τ)

    Developing and Testing of an Upper Limb Exoskeleton for Stroke Patients

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    Objective: The main objective of this study was to determine functional and neuromuscular outcomes of stroke patients using their non-preferred hand with and without a 3D printed passive exoskeleton compared to controls using their non-preferred hand with and without the passive exoskeleton. Methods: Adults at least six months post stroke (Stroke, n = 5) and age- and sex- matched healthy controls (Control, n = 5) performed nine trials of a gross motor task while having their brain activity measured. The Fugl-Meyer and “Box and Block” test was used to measure the gross dexterity of the subjects with and without the exoskeleton. Strength testing, muscle activation and co-activation of the subjects’ forearms were measured during maximal voluntary contractions. Furthermore, EMG was measured during the Box and Block test and satisfaction and usability of the 3D printed exoskeleton were assessed using standardized questionnaires. Results: Separate two-way repeated ANOVAs were used to investigate the functional and neuromuscular outcomes. There was an interaction [F(1,4) = 41.60; p = .003, ηp2 = 0.912] with an observed power of 0.996. Decomposing the model, a dependent t-test (p = 0.004) showed the stroke subject’s preferred hand moved more blocks than the stroke subject’s non- preferred hand. The exoskeleton received an average QUEST score of 4.23 out of a maximum score of 5 and SUS score of 79.50 out of 100. Conclusion: The main finding showed the passive exoskeleton did not improve function or neuromuscular outcomes for the stroke patients
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