Study of the mechanical properties of a ceramics of orthopedic and dental use

The study of the preparation of ceramics is consisted in sintering a hardened cement, wich is composed of mixture of three calcium phosphates : tetracalcium phosphate (Ca4(PO4)2O), -tricalcium phosphate (-Ca3(PO4)2) and monocalcium phosphate (Ca(H2PO4)2.H2O).After wetting, the cement evolved towards an apatitic phase while hardening. To check the effect of certain factors on the resulting ceramics, a complete central composite design of four variables (liquid/solid ratio, stoichiometric coefficient of monocalcium phosphate, rate of increase in temperature and duration of landing of termpertaure) was set up. The equation of the model and optimal conditions were defined

Basis of Designing Test Questions of English Language That Reflect Intended Learning Outcomes (ILOs)

Teaching is one of the most important professions that affect different aspects of life. Brown (1994) stated that testing and teaching are different, but they are interwoven and interdependent, that it is difficult to tease them apart. Teachers teach, and then test to find out if they had achieved their course objectives. As teachers sometimes fail or find difficulties to come out with perfect test that backwash the whole process of course learning; in other words they fail to construct test that meets all intended learning outcomes (ILOs). So, this paper aims at: finding out reasons behind questions’ weakness of English Language tests, and finding solutions that can help educators write their test-questions in scientific pedagogical way, that tests all course content, and reflects (ILOs). The researcher used the descriptive analytical method, a teachers’ questionnaire is used as instrument to collect data, and 10 tests’ questions were analyzed to tackle reasons behind questions’ weakness. Participants of this study are 22 instructors from College of Science & Arts, Muhayil “KKU” Finding indicated reasons behind questions’ weakness of English Language tests are the inadequate way of designing tests, as a result of ignorance of the basics of test questions criteria and lacking knowledge of how to use Bloom Taxonomy and (TOS). Instructors need training about how to use Bloom Taxonomy and Table of Specification in designing Tests’ Questions of English Language in a pedagogical way

Finite Matroidal Spaces and Matrological Spaces

The purpose of this thesis is to present new different spaces as attempts to generalize the concept of topological vector spaces. A topological vector space, a well-known concept in mathematics, is a vector space over a field \mathbb{F} with a topology that makes the addition and scalar multiplication operations of the vector space continuous functions. The field \mathbb{F} is usually \mathbb{R} or \mathbb{C} with their standard topologies. Since every vector space is a finitary matroid, we define two spaces called finite matroidal spaces and matrological spaces by replacing the linear structure of the topological vector space with a finitary matroidal structure. The idea is to combine a finitary matroidal closure operator like the linear closure operator with a topological closure operator into a single closure operator called a common closure operator. Therefore, one may take a set with a finitary matroidal closure operator and a topological closure operator like the topological vector space. The study starts with basic definitions, some fundamental properties and a collection of examples. The finite matroidal spaces and matrological spaces are then presented. Furthermore, the idea of a common closure operator is introduced and then a discussion is given of when to obtain from a set and a common closure operator a finite matroidal space or a matrological space. Finally, relationships of topological vector spaces with both finite matroidal spaces and topological vector spaces are presented

All optical multicasting in wavelength routing mesh networks with power considerations: design and operation

Wavelength routing Wavelength Division Multiplexing (WDM) are optical networks that support all-optical services. They have become the most appealing candidate for wide area backbone networks. Their huge available bandwidth provides the solution for the exponential growth in trayc demands that is due to the increase in the number of users and the surge of more bandwidth intensive network applications and services. A sizable fraction of these applications and services are of multi-point nature. Therefore, supporting multicast service in this network environment is very critical and unique. The all-optical support of various services has advantages, which includes achieving the signal transparency to its content. Nevertheless, the all-optical operational support comes with an associated cost and new issues that make this problem very challenging. In this thesis, we investigate the power-related issues for supporting multicast service in the optical domain, referred to as All-Optical Multicasting (AOM). Our study treats these issues from two networking contexts, namely, Network Provisioning and Connection Provisioning. We propose a number of optimal and heuristic solutions with a unique objective function for each context. In this regard, the objective function for the network provisioning problem is to reduce the network cost, while the solutions for the connection provisioning problem aim to reduce the connection blocking ratio. The optimal formulations are inherently non-linear. However, we introduce novel methods for linearizing them and formulate the problems as Mixed Integer Linear Programs. Also, the design of the heuristic solutions takes into account various optimization factors which results in efficient heuristics that can produce fast solutions that are relatively close to their optimal counterparts, as shown in the numerical results we present

New Software Architecture for Mobility and Handoff Management in Mobile IPV6 Networks

This paper addresses the problem of overall network signaling and packet delivery cost in Mobile Internet Protocol (MIP) systems for serving mobility and service management related operations. In MIP, a Mobile Node (MN) interacts with its home agent, when it is connected to a foreign agent to manage the mobility and packet delivery in a bidirectional tunneling mode. This paper proposes new software mobility management service architecture with the goal to handle the heavy burden on the home network and to minimize the cost of network signaling and packet delivery. Under the proposed architecture, a MN creates a Mobile Remote Object (MRO) and transfers it to the router of the hosted network. The MRO registers itself with a naming service server. The MRO handles all services engaged by the MN without relying on centralized traffic

Nonparametric predictive inference for diagnostic test thresholds

Nonparametric Predictive Inference (NPI) is a frequentist statistical method that is explicitly aimed at using few modelling assumptions, with inferences in terms of one or more future observations. NPI has been introduced for diagnostic test accuracy, yet mostly restricting attention to one future observation. In this thesis, NPI for the accuracy of diagnostic tests will be developed for multiple future observations. The present thesis consists of three main contributions related to studying the accuracy of diagnostic tests. We introduce NPI for selecting the optimal diagnostic test thresholds for two-group and three-group classification, and we compare two diagnostic tests for multiple future individuals. For the two- and three-group classification problems, we present new NPI approaches for selecting the optimal diagnostic test thresholds based on multiple future observations. We compare the proposed methods with some classical methods, including the two-group and three-group Youden index and the maximum area (volume) methods. The results of simulation studies are presented to investigate the predictive performance of the proposed methods along with the classical methods, and example applications using data from the literature are used to illustrate and discuss the methods. NPI for comparison of two diagnostic tests is presented, assuming the tests are applied on the same individuals from two groups, namely healthy and diseased individuals. We also introduce weights to reflect the relative importance of the two groups

La traducción de la poesía árabe clásica: Al-Mutanabbi

La tesis aborda el análisis y valoración de la traducción de la poesía del autor árabe Al-Mutanabbi titulada " Al-Mutanabbi Tiempo sin Tregua (101 poemas)" al español y realizada por Milagros Nuin y Clara Janés:(2007)