Univ., Diss.--Paris, 2001.

The diploma thesis is focuses on new technology in of high pressure die casting industry. Attention is paid in particular to heating, cooling and the influence of the die lubricants on the quality of castings. theoretical knowledge was applied in practise. The optimization of the production cycle was carried out using a high temperature die lubricant and subsequent evaluation on particular casts in foundry KOVOLIT Modřice a.s.

Published Article / This paper is based on tests performed on die component specimens manufactured by EOS-DMLS (direct metal laser sintering) and LENS (laser engineered net shape) RP (rapid prototyping) technology platforms, as well as manufactured specimens machined out of preferred standard hot work steel DIN 1.2344. These specimens resemble typical components used in metal high pressure die casting tool sets. The specimens were subjected to a programme of cyclic immersion in molten aluminium alloy and cooling in water-based die release medium. The heat checking and soldering phenomena were analyzed through periodic inspections, monitoring crack formation and evidence of surface washout. At the end of the thermal tests, mechanical strength and hardness tests were performed to assess toughness and core resistance variations in relation to the initial conditions. Finally metallographic investigations were performed through optical microscopy on all the specimens considered. The outcomes of this research will be presented and used by the CSIR for further development and application of the assessed EOS-DMLS and LENS rapid prototyping technologies in rapid die manufacturing techniques and die design principles, including time and economic feasibility criteria to be applied when considering rapid die manufacture.

In forging industry, the die setup starts with unloading the previous die set and ends with approval of the first part produced. During conventional die setup, forging press is kept idle. The aim of this study is to perform die changing applications of the 1000 ton forging press of Aksan Steel Forging Company in more systematic way to reduce the idle time. The applicability of Single Minute Exchange of Dies (SMED) System and quick die locating methods have been studied. SMED classifies the setup operations as internal and external setup operations. During the internal setup operations the press is kept idle. Therefore it has been tried to reduce the internal setup time. In this study, a new modular die system has been developed. The die system to be used for the forging press with 1000 ton capacity in Aksan Steel Forging Company has been redesigned regarding the dimensional limitations, requirements, SMED System and quick die locating methods. The modules of proposed die system and the dies for a particular forging part have been produced. Tests, observations and time studies have been carried out. The time spent for alignment of the upper and lower dies on the press have been eliminated in the proposed system. The solutions have been proposed for the frequently encountered problems of setup operations of the company and these have been applied in the system. In order to eliminate operator mistakes, marking applications have also been introduced and the application of die cavity revision has been renewed. During the time studies for the case study, it has been seen that the internal setup time of the forging press with 1000 ton capacity has been reduced from 220 minutes to 141 minutes which corresponds to a reduction of 36 %.

No description available.

Auf dem Bereich des Bildungssystems entstehen immer wieder neue Aufgabes für die Sozialpädagogik. Negative Verändrungen in der Gesellschaft, d.h. hohe Arbeitslosigkeit, hohe Anzahl von Verbrechen sowie drogen- bzw. alkohosüchtigen Kindern und Jugendlichen, sind Erscheinungen, schlechte soziale Lage der Kinder verurseuhen. Sie fühlen sich unsicher in ihre Umgebung. Um diese negative Erscheinungen aus dem Leben der Kinder, aus ihren Familien und auch aus dem Schulleben zu beseitigen, werend neun Arbeitsstellen für die Spezialisten geschaffen, die für das Positive im Leben der Kinder kämpfen. Diese Spezialisten sind Sozialpädagogen. In der vorliegenden Magisterarbeit werden die Schulgemeinschaft sowie die Rolle ihrer Mitglieder in der Schule, Möglichkeiten der Zusammenarbeit, unterschiede zwischen Dorf- und Stadtgemeinschaaften und die Rolle des Sozialpädagogen in der Schule besprochen. In dieser Arbeit werden die wichigsten Aufgaben der Tätigkeitsbereich des Sozialpädagogen, seine Funktionen, der Begrif der Sozialpädagogik und optimales Tätichkeitsmodell. Ald der Gegenstand dieser Untersuchung wurde der tätichkeisbereich des Sotialpädagogen gewält. Es wurden folgende Azfgaben in der Untersuchung erhoben: die wissenschaftlich – pädagogische Literatur zu analisieren und die Unterlage der Bildungsreform die Unterlagen der Bildungsreform sowie der Regierung in denen sich die mit der Arbeit des Sozialpädagogen verbundenen Probleme widerspiegeln, zu besprochen; die Besonderheiten der... [to full text]

Die Probiotika werden heute sehr breit in der Ernährung von Menschen, Tieren und Vögeln verwendet. Bei den Probiotika handelt es sich um lebensfähige Formen von spezifischen Mikroorganismen, die dem tierischen Organismus kontinuierlich dem Futter zugeführt wurden. Die Prüfung erfolgte in 2 Leistungsversuchen mit den Schweinen. In jedem Versuch waren 3 Gruppen gebildet. Beide Gruppen in den Experimenten waren identisch bezüglich genetischer Konstruktion, Geschlecht, Alter und Lebendmasse der verwendeten Tiere. In beiden Versuchen in den Futtermischungen der Kontrollgruppe kam das Mineralfuttermittel Dynaphos M 2000 ohne Probiotikum zum Einsatz. Das Mineralfuttermittel Schaumalac M 55 als Komponente in den Futtermischungen der Versuchtiere wurde mit dem Probiotikum Bonvital suplementiert und 1kg Futter hatte 30x108 KBE (Enterococcus faecium). Im Futter für die Gruppe III wurden mineralische vitaminische Futterzusatzstoffe ohne Probiotikum und mit kleinerer Anzahl von Vitaminen verwendet. Im Versuch Nr.2 in der Futtermischungen für die Gruppe III wurde Probiotikum Biomin Imbo verwendet und 1kg Futter hatte 0,75x108 KBE (Enterococcus faecium). Mastleistung : die Futterzusatzstoffen mit Bonvital und Biomin Imbo wirkten auf die Lebendmasse so: die Tageszunahme war 3% höher im Versuch Nr.1 und 1,5% höher im Versuch Nr.2, und sogar 6% höher (Versuch Nr.2 mit Biomin Imbo). Solche Ergebnisse wirkten auch auf Futteraufwand: (im Versuch Nr.2 mit Bonvital) benötigten die Tiere 3%... [to full text]

No description available.

This thesis explores some of the different ways in which people anticipate their dying in the U.K. Through an ethnographic exploration of an arts initiative, a social movement, a legal case, and a new law, this thesis asks the question: how do people seek to gain recognition for their dying in the 21st Century? It is argued here that this recognition is deemed important because it is the last opportunity for people’s unique identity, as they perceive it, to be reflected back at them in the faces of those who witness their dying and who stand alongside them. This witnessing is often performed in public spaces, for example: a hospice day centre; in the media spotlight; at a right-to-die conference; or in a court of law, and it is in these places where people hope that their individualised dying self will be authenticated. This thesis focuses on what happens in these public spaces and asks whether recognition is always possible. It concludes by suggesting that there are some things which are perhaps too private, too particular, and too uncertain to be recognised or authenticated in the way in which people might wish. Section One of this thesis focuses on the activities of an arts charity which works in hospices in the U.K. and tries to elicit testimony from dying patients. Section Two focuses on the right-to-die movement: its history, politics, and the activists which bring it to life. Section Three focuses on the legal regulation of death through careful examination of a legal challenge and a new law which both involve people making anticipatory decisions about how they wish to die. As this thesis shows, people’s dying testimony can take many different forms (artistic, legal, bureaucratic), and it can be represented in terms of suffering or transcendence. But the overwhelming desire of the people who feature in this thesis is to have the particularity of their lives, which is mirrored in the particularity of their deaths, publicly recognised.

No description available.