The diploma thesis is aimed to assesment of the influence of the specimen orientation during the Small Punch Tests (SPT). Steel ČSN 41 0214, or its equivalent steel RFe80, W.-Nr. 1.104 was chosen for experiments. Resulting records from SPT were evaluated using already known correlations which are reported in literature. The correlation values were compared with values obtained by the standard tests like Charpy impact test and tensile test. The influence of axial, radial and tangential test specimens orientation is discussed in relation to Ductile-to-Brittle fracture behaviour of the steel.

At the beginning of the Master’s thesis the asphalt mixture of the type asphalt concrete and its basic properties are described. The main point of this work is to compare the functional properties of asphalt mixtures with the addition of higher amount of RAP and various rejuvenators used in the experimental section. From individual samples of asphalt mixtures taken during the laying, the control tests were carried out and the process of permanent deformation with the wheel tracking test was monitored. After that, using functional tests the properties of asphalt mixtures with conventional modified and unmodified asphalt bitumen enriched with the addition of declaring similar properties were compared.

In der vorliegenden Arbeit wurden bruch- und schädigungsmechanische Eigenschaften keramischer Filterwerkstoffe, welche im Rahmen des SFB 920 entwickelt und erforscht werden, bestimmt. Es wurden zwei verschiedene Werkstoffsysteme - Aluminiumoxid und kohlenstoffgebundenes Alumniumoxid - mit entwickelten Miniaturprüfmethoden bei Prüftemperaturen bis 1500°C untersucht. Mit Hilfe des Ball-On-Three-Balls-Tests (B3B) wurde die biaxiale Festigkeit in Abhängigkeit der Prüftemperatur bestimmt. Für die kohlenstoffgebundenen Proben wurde weiterhin der Einfluss der Verkokungstemperatur als auch des Kohlenstoffgehalts auf die Festigkeit untersucht. Es konnte ein Festigkeitsmaximum ermittelt werden, wenn die Prüftemperatur der Verkokungstemperatur entspricht. Die schädigungsmechanischen Materialparameter des duktilen Verformungs- und Versagensverhalten beider Werkstoffe bei 1500°C wurden mit Hilfe von numerischen Simulationen des B3B identifiziert. Die Bestimmung der bruchmechanischen Kennwerte erfolgte mit einem Vier-Punkt-Biegeversuchsaufbaus mit Chevron-gekerbten Proben (CNB-Versuch). Numerische Untersuchungen dienten zur Bestätigung der Versuchsergebnisse und Bestimmung der Form der Rissfront sowie Risswachstum während des Versuches. / In the present work, fracture and damage mechanical properties of ceramic filter materials, which are developed and investigated within the framework of the CRC 920, are determined. Two different material systems - alumina and carbon-bonded alumina - are investigated using miniaturized test methods at temperatures up to 1500°C. The biaxial strength at different temperatures is determined using the Ball-On-Three-Balls-Test (B3B). The strength of carbon-bonded specimens is dependent on the coking temperature and the carbon content. A maximum strength can be obtained if the testing temperature equals the coking temperature. The damage-mechanical material parameters in order to describe the ductile deformation and failure behaviour of both materials at 1500°C are identified with the help of numerical simulations. The determination of fracture-mechanical properties are carried out with a four-point bending test setup with chevron-notched specimens (CNB). Numerical investigations are used to validate the test results and to simulate the shape of the crack front and crack growth during the experiment.

The purpose of this study was to determine the progress of the immunization program for Contagious Diseases in the City Schools of Dallas, Texas, over a period of ten years, dating from September 1928, to September 1938. An endeavor was made to determine how the Health Works Program of the Dallas Public Schools developed, and the protection it gave the public children.

It is the purpose of this problem to classify the four major pastures of the McMurry ranch using the discussed classification system. The definite measurable qualities characterizing each condition of the system are used extensively in this study. The problem is concerned also with the observation of results of misuse, the present practices that could result in further depletion of portions of the McMurry ranch, and procedures being employed at the present time aimed toward the restoration of these depleted portions.

In this study sixteen early stone buildings at Fredericksburg, Texas, are described and evaluated as examples of indigenous architecture. Chapter II presents a brief history of the founding of Fredericksburg. Chapter III presents a description of the town site and a discussion of the native materials as used by the pioneer immigrants in the construction of residences and other buildings. Chapter IV is devoted to a detailed description of fourteen buildings as specific examples of the indigenous architecture. Representative photographs of the buildings as they now appear, as well as floor plans, illustrate the text. Two early churches of the indigenous type, accompanied by photographs and floor plans, are discussed in Chapter V. In Chapter VI a summary of the study is given and conclusions are presented.

The predominant theme utilized by the Texas Centennial is the historical background Texas, which encompasses a hundred years of independence and four centuries of progress. This study aims to select and classify those buildings in the Texas Centennial Exposition containing exhibits possessing educational significance for junior high school social studies students.

The purpose of this study was to collect and compile data on the principal climatic factors of the Denton area which affect one's personal comfort and health, in order to show how a maximum of these commodities could be secured through manipulation and control of the climate of individual building sites. In the Denton County area the naturally breezy climate of summer, excluding areas near heat-collecting surfaces of pavement and masonry, is not usually uncomfortable out of doors unless one is directly exposed to the sun; but, as a result of improper orientation of houses, indoors one often feels a pressing still heat and a general discomfort. The writer's interest in the field of architecture led to a desire to find out how this condition could be alleviated; therefore, this study was undertaken.

The general purpose of this investigation is to examine the values of print making as compared with drawing and painting in their respective relationships as a part of the junior-high-school art program. The specific purposes of the investigation are: 1. To determine the values which are common to both the print-making arts and the drawing-painting arts. 2. To discover the values which are unique in the print-making arts. 3. To determine which of the print-making processes belong in the junior high school. 4. To recommend the grade placement and limitations of print-making for the junior high school. A conservative general conclusion, based upon objective evidence, can safely be drawn to the effect that in all phases of the learning experiences print making was found to be as valuable as painting and drawing. Its values were compared with respect to specific art development, to general educational growth, to socialization, and to character training.

The PhD thesis deals with the possibility of performing dynamic tensile tests. For this purpose, Split Hopkinson Pressure Bar Test (hereinafter SHPBT) is used. The basic construction of SHPBT device is designed to perform dynamic compression tests on materials (metals, plastics, and ceramics). The obtained results are deformation stress – strain and strain rate – strain dependences. SHPBT is capable of testing materials at high strain rates up to 10^2 – 10^3 s-1. It was created a special device for dynamic tensile tests of materials at high strain rates. The created device uses the basic construction of SHPBT. The special device is used for testing flat specimens with 2 mm thickness. It was recognized by the Industrial Property Office of the Czech Republic as a utility model with number 23703. The specimens used for dynamic tensile testing were made of austenitic stainless steel (WNr. 1.4301) with 2 mm thickness. The verification of created device was carried out by numerical simulation. The numerical simulation was performed by ANSYS LS – Dyna software.