Development of Automatic Storage Retrieval System for Variable Loads

Automated Storage and Retrieval Systems (ASRS) have been widely used in warehousing systems to speed up load movements and save storage space. ASRS is an integrated system that is equipped with a controller and arm for the collection and storage of goods. This paper discusses the results of developing a system for taking and storing goods for various loads. The prototype element consists of a mechanism for retrieving, placing and application for data collection into the database. In this research, the design and development of ASRS was carried out to be applied in the storage of products of various sizes which is suitable for small size industries. The development process includes investigating features that have been developed in the ASRS, operating procedures, hardware selection and software development in accordance with the mechanism designed. Numerical control which moves the carrier element with high resolution is applied to be able to place the load in a changing position. Development and testing is carried out to ensure the performance of the tool runs well and the data storage that includes the identification and size of the load can be recorded properly.

EVALUATION STUDY ON WOODEN PILLAR MOSQUES BUILT IN ANATOLIA IN THE 13TH CENTURY

In this article, mosques that are carried on wooden poles, which have a very important place among Anatolian Seljuk and Principalities (Beyliks) Period mosques and covered with flat wooden roofs, are discussed. With the continuation of the wooden pillar mosque tradition in Central Asia, very important examples of this building type, which were brought to Anatolia by the Turks in the Anatolian Seljuk State Period, were revealed in the 13th century. In this study, Beyşehir Eşrefoğlu Mosque, Afyon Ulu Mosque, Ankara Arslanhane (Ahi Şerafettin Mosque) and Sivrihisar Ulu Mosque, which are the most magnificent examples of this building type, were investigated. After the archive and literature researches about these buildings were done, a catalog study of the buildings was made. Within the scope of this study, the formal features of the buildings such as plan, facade, construction technique, plan type, number of entrances, the presence of the last congregation and the presence of a gathered floor, the environmental relation, the spatial characteristics such as the carrier element and the architectural elements were examined. The aim of the article is to make a general inference on the wooden pillar mosques built in Anatolia in the 13th century in line with the data obtained from the studies and to determine the common aspects of wooden pillar mosques built in four different parts of Anatolia. In the light of the information obtained as a result of the catalog studies and archive scans, it has been observed that the structures have similar characteristics especially in terms of the materials and construction techniques used, but some of their features differ and take shape in line with the construction traditions of the places where they are located. Konya Sahipata Mosque, which was built in the 13th century, was excluded from the scope of the study, as its general characteristics were completely changed after the fire.

EVALUATION STUDY ON WOODEN PILLAR MOSQUES BUILT IN ANATOLIA IN THE 13TH CENTURY

In this article, mosques that are carried on wooden poles, which have a very important place among Anatolian Seljuk and Principalities (Beyliks) Period mosques and covered with flat wooden roofs, are discussed. With the continuation of the wooden pillar mosque tradition in Central Asia, very important examples of this building type, which were brought to Anatolia by the Turks in the Anatolian Seljuk State Period, were revealed in the 13th century. In this study, Beyşehir Eşrefoğlu Mosque, Afyon Ulu Mosque, Ankara Arslanhane (Ahi Şerafettin Mosque) and Sivrihisar Ulu Mosque, which are the most magnificent examples of this building type, were investigated. After the archive and literature researches about these buildings were done, a catalog study of the buildings was made. Within the scope of this study, the formal features of the buildings such as plan, facade, construction technique, plan type, number of entrances, the presence of the last congregation and the presence of a gathered floor, the environmental relation, the spatial characteristics such as the carrier element and the architectural elements were examined. The aim of the article is to make a general inference on the wooden pillar mosques built in Anatolia in the 13th century in line with the data obtained from the studies and to determine the common aspects of wooden pillar mosques built in four different parts of Anatolia. In the light of the information obtained as a result of the catalog studies and archive scans, it has been observed that the structures have similar characteristics especially in terms of the materials and construction techniques used, but some of their features differ and take shape in line with the construction traditions of the places where they are located. Konya Sahipata Mosque, which was built in the 13th century, was excluded from the scope of the study, as its general characteristics were completely changed after the fire.

AN ANALYTICAL APPROACH AGAINST PROGRESSIVE COLLAPSE AFTER EXPLOSION RC BUILDING

Reinforced concrete structures may be subjected to uncontrolled sudden loads such as weight or rock fall, industrial or transport accidents, military or terrorist activities, controlled or bottled gas, natural gas, fuel tanker or fuel station explosion. It is difficult to predict how the structure will react under dynamic impact loading. However, creating scenarios taking measures against dynamic loading is a simple solution for behavior impact prediction. In this study was investigated to remove of the middle column in the reinforced concrete structure after the internal explosion. Static analyzes were carried out with IdeCAD Static software according to the load distributions after the carrier element removed in the typical building. In this study, load distribution principles are reviewed in accordance with ASCE 7-10, GSA 2016 and ACI 318 recommendations after subtracting elements. As a result, element remove scenarios are required as a design principle for structures.

Major Carrier Element Concentrations in SiC Powder and Bulk Crystal

Boron, aluminum, and nitrogen are major and critical elements in silicon carbide. The concentrations of these elements influence the electrical properties of silicon carbide and also the generation of defects. Purification was executed in the powder manufacturing process. High purity powder was used to grow the crystal, which was then sliced into wafers in this work. Secondary ion mass spectroscopy (SIMS) and glow discharge mass spectrometry (GDMS) were used to measure boron, aluminum, and nitrogen concentrations in wafer and powder to compare the concentration difference. The concentration of the elements varies depending on the element’s physical property. Transfer coefficient is defined as the ratio of element concentration in wafer to powder, which is interesting to realize the element behavior in PVT process and studied in this work.