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loading » leading (Expander búsqueda)
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1
artículo
Publicado 2005
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lnmediate funtional loading is a new surgical - prosthetic technique that can be used extensively in implant placement. Because of a lack of experimental reports regarding edentolous maxilla, we decided used this procedure it evaluate in the future.
2
artículo
Publicado 2005
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lnmediate funtional loading is a new surgical - prosthetic technique that can be used extensively in implant placement. Because of a lack of experimental reports regarding edentolous maxilla, we decided used this procedure it evaluate in the future.
3
artículo
The procedural charges that arise as activities of the parties in the jurisdictional process become like the original gender of the burden of proof; these are in the conceptualization of the thoughts of Goldschmidt and Carnelutti. The doctrine has treated procedural charges by basing the part of the discussion itself and is a faculty of an obligation; however, the controversy arises from the observation of the dynamics of the procedural norm and its structure, from which arises the consecutive character that generates the conduct of each one of the parties. It is precisely this dynamism that allows the party to opt for a positive behavior of the omission in which the right to defense in the trial materializes
4
artículo
Publicado 2022
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Oral implantology is the discipline that has revolutionized dentistry, and it is of crucial importance to carry out a practice applying clinical procedures based on scientific evidence. Likewise, multiple protocols and consensuses have been developed. That is why success lies in performing an adequate preoperative analysis (clinical and tomographic), applying solid theoretical bases and evaluating risks in each case to carry out predictable and successful treatments. This review synthesizes the indications, surgical aspects and recommendations for installation and loading times; as well as the considerations for the management of provisional restorations in oral implantology. Four times have been established for the placement of dental implants: Immediate (implant type 1), early (implants type 2 and 3) and late (implant type 4) and three times for the loading of dental implants: Immedi...
5
artículo
Publicado 2005
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Active filtering of electric power has now become a nature technology for harmonic and reactive power compensation. This paper deals about study and simulation of an Active Power Filter (APF) it Works with a four different single phase non linear loads, also simulations results of practical cases are included.
6
preprint
Adobe is one of the oldest construction materials that is still used in many seismic countries, and different construction techniques are found around the world. The adobe material is characterized as a brittle material; it has acceptable compression strength but it has poor performance under tensile and shear loading conditions. Numerical modelling is an alternative approach for studying the nonlinear behaviour of masonry structures such as adobe. The lack of a comprehensive experimental database on the adobe material properties motivated the study developed here. A set of a reference material parameters for the adobe were obtained from a calibration of numerical models based on a quasi-static cyclic in-plane test on full-scale adobe wall representative of the typical Peruvian adobe constructions. The numerical modelling, within the micro and macro modelling approach, lead to a good pre...
7
artículo
Electrocoagulation is frequently studied considering only the current or current density as a determining parameter when looking for the optimal conditions of wastewater treatment; however, these are correlated to the charge loading parameter that regulates the dose of metal to be dissolved. Due to this, the present study incorporates the charge loading to find the optimal conditions of treatment by electrocoagulation to the effluents of a dairy industry, “La Planta Piloto de Leche” of Universidad Nacional Agraria La Molina, taking as a variable response to the removal of turbidity. Work has been done in batch on prototypes of 2.2 liters of effective capacity. The aluminum and iron electrodes, acting as anode and cathode respectively, were the best materials for the treatment, in addition, the highest turbidity removal was achieved at a pH of 8 and a charge flow of 5.65 F/m3, achieve...
8
artículo
The tests on test rigs to simulate the real contact conditions generated between the teeth of a gear, but are expensive and of limited utility for its accuracy depends on the condition of equipment and material. The objective of this research is to develop a procedure that simulates the bending stress in gear teeth plastic through numerical simulation method and the study of the main parameters that affect the performance of plastic gears such as torque, power and efforts of these gears when in operation regime, comparing with the molten steel. The results of this research meet the general and specific objectives of the study, which will help in improving the technology of Peruvian industry.
9
artículo
Publicado 2012
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The tests on test rigs to simulate the real contact conditions generated between the teeth of a gear, but are expensive and of limited utility for its accuracy depends on the condition of equipment and material. The objective of this research is to develop a procedure that simulates the bending stress in gear teeth plastic through numerical simulation method and the study of the main parameters that affect the performance of plastic gears such as torque, power and efforts of these gears when in operation regime, comparing with the molten steel. The results of this research meet the general and specific objectives of the study, which will help in improving the technology of Peruvian industry.
10
tesis de maestría
Identifica la susceptibilidad a falla por flujo de licuación en pilas de bauxita transportadas de manera marítima. La falla por flujo es un fenómeno con consecuencias catastróficas del fenómeno de licuación de suelos que ocurre también en materiales mineros. Este trabajo de maestría busca determinar el grado de susceptibilidad del ore de bauxita a falla por flojo durante el transporte marítimo debido a cargas cíclicas utilizando ensayos triaxiales no drenados y la teoría del estado crítico.
11
artículo
Publicado 2019
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We studied the uniform stabilization of a class of Timoshenko systems with tip load at the free end of the beam. Our main result is to prove that the semigroup associated to this model is not exponentially stable. Moreover, we prove that the semigroup decays polynomially to zero. When the damping mechanism is efective only on the boundary of the rotational angle, the solution also decays polynomially with rate depending on the coecients of the problem. The objective of this work is to present in a didactic way the results obtained in the article [9], using the theory of semigroups used in [10] and also contribute with the numerical part seen in [1]
12
artículo
Publicado 2012
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In this work the synthesis of magnetite nanoparticles by coprecipitación in inverse microemulsion, which were introduced inside the pores of the polystyrene nanoparticles is reported. The nanoparticles of porous polystyrene were synthesized by heterogeneous polymerization in semicontinuo, which were employed like cover polymeric due to their biocompatibility and biostability. Through the analysis by X-ray diffraction was verified the structure of the magnetite, and estimated its average diameter of 9 nm. The polystyrene nanoparticles loaded with magnetite were prepared in different compositions magnetite/polymer and were determined by the test of magnetization that the magnetic moment (emu/g) is increased when the content of magnetite in the porous of polystyrene nanoparticles is increased.
13
tesis de grado
Publicado 2025
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Economic policies and the crisis caused by COVID-19 have harmed mining production, with minimal, slow, and conservative investments. An alternative to improve this is underground mining, which represents 43% of worldwide operations; however, the limited production and the number of accidents are limiting, so the procedure for the optimization of times and the time of exposure of workers to danger during the installation of loading tubes were evaluated. For this, the current and improved PAD and POD were analyzed (after the modification of the bit and loading tube), evidencing that in the current procedure, it takes 91 minutes for the installation, with an advance of two and a half cycles. In contrast, in the improved situation, it takes 23 minutes, reaching three cycles, concluding that there is an optimization of 68 minutes per cycle. The time of exposure to danger is also reduced by 2....
14
artículo
Traditional forecasting models have been widely used for decision-making in production, finance and energy. Such is the case of the ARIMA models, developed in the 1970s by George Box and Gwilym Jenkins [1], which incorporate characteristics of the past models of the same series, according to their autocorrelation. This work compares advanced statistical methods for determining the demand for electricity in Colombia, including the SARIMA, econometric and Bayesian methods.
15
artículo
Floristic composition and rangeland condition of the Phynaya Peasant Community (located North of Pitumarca district and EastNorth of Canchis Province, Cusco region) were evaluated to estimate stocking rate under climate change scenario. Floristic composition, vegetation cover, and plant vigor were evaluated on 79 step-transects of 200 m in six rangeland sectors. Preliminary results reveal that there are 60 species, grouped in 13 families, where the dominant families were Poaceae (46.67%), Asteraceas (15%) and seudograsses (13.3%), of which, 45% were palatable for alpacas. Of the total grazing areas, alpacas´ areas represent 70.4%, llamas 15.4%, cattle 3.5%, sheep 4.5% y vicunas 6.3%. Actual stocking was 1 alpaca unit per hectare while stocking rate average estimated was fair with supportability of 0.78 UAl/ha; thus, rangelands are considered on degradation process
16
artículo
Publicado 2020
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The effect of the addition of cholesterol-loaded methyl-β-cyclodextrin (CLC) on the microscopic characteristics of chilled and frozen/thawed ram semen was evaluated. Four 1-2-year-old Asblack rams were used. Thirty ejaculates divided into groups of three aliquots each were used to which CLC (0, 1 and 2 mg of CLC/120 million sperm, T1, T2 and T3 respectively) were added at 22 °C and incubated for 15 minutes. Samples were then refrigerated and stabilized at 5 °C for 18 hours. Semen freezing was done in straws using nitrogen vapours for 4 minutes (-120 °C) and then submerged in liquid nitrogen. There were no statistical differences between treatment averages in all characteristics of refrigerated semen. The post thawing results showed improvements with the use of cholesterol in the cryopreservation of ram semen (p<0.5), obtaining a motility of 65.3, 68.7 and 75.37%, vitality of 56.6,...
17
artículo
Floristic composition and rangeland condition of the Phynaya Peasant Community (located North of Pitumarca district and EastNorth of Canchis Province, Cusco region) were evaluated to estimate stocking rate under climate change scenario. Floristic composition, vegetation cover, and plant vigor were evaluated on 79 step-transects of 200 m in six rangeland sectors. Preliminary results reveal that there are 60 species, grouped in 13 families, where the dominant families were Poaceae (46.67%), Asteraceas (15%) and seudograsses (13.3%), of which, 45% were palatable for alpacas. Of the total grazing areas, alpacas´ areas represent 70.4%, llamas 15.4%, cattle 3.5%, sheep 4.5% y vicunas 6.3%. Actual stocking was 1 alpaca unit per hectare while stocking rate average estimated was fair with supportability of 0.78 UAl/ha; thus, rangelands are considered on degradation process
18
artículo
Publicado 2024
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The high seismic activity on the Peruvian coast carries a potential risk of tsunamis that could affect the Peruvian coast, causing damage to people and structures. According to studies carried out by CISMID and Fondecyt, approximately 83% of the houses in Metropolitan Lima and Callao are made of masonry, mainly due to its low economic cost. The present experimental study aims to study the behavior of confined masonry walls under the action of perpendicular loads to the wall produced by the impact of tsunami waves, which is a field of research where it is still necessary to delve deeper with experimental studies of the structures under equivalent tsunami loads. As part of the experimental study, 2 confined masonry walls were built, which were tested under the action of perpendicular loads applied by means of hydraulic jacks with a force control simulating the forces induced by a tsunami. ...
19
artículo
Floristic composition and rangeland condition of the Phynaya Peasant Community (located North of Pitumarca district and EastNorth of Canchis Province, Cusco region) were evaluated to estimate stocking rate under climate change scenario. Floristic composition, vegetation cover, and plant vigor were evaluated on 79 step-transects of 200 m in six rangeland sectors. Preliminary results reveal that there are 60 species, grouped in 13 families, where the dominant families were Poaceae (46.67%), Asteraceas (15%) and seudograsses (13.3%), of which, 45% were palatable for alpacas. Of the total grazing areas, alpacas´ areas represent 70.4%, llamas 15.4%, cattle 3.5%, sheep 4.5% y vicunas 6.3%. Actual stocking was 1 alpaca unit per hectare while stocking rate average estimated was fair with supportability of 0.78 UAl/ha; thus, rangelands are considered on degradation process
20
artículo
Publicado 2018
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This work presents a system to improve stability of diesel engines in low loads and rotational speed rates by using a special and easy valve, called RND, which is installed in the high pressure pipe. This valve is actioned automatically by pressure difference, which lets insert low fuel quantities directly to the line, making the injection process steady in the indicated rates. Comparative results of the test made in a linear injection pump are included, to which a RND valve and a piezoelectric sensor was installed. The oscilograms of pressure and the inequality of fuel supply, in order to determine the improvement of stability of the injection system performance, are also included.
