Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第15360号 / 工博第3239号 / 新制||工||1487(附属図書館) / 27838 / 京都大学大学院工学研究科都市環境工学専攻 / (主査)教授 森澤 眞輔, 教授 酒井 伸一, 教授 米田 稔 / 学位規則第4条第1項該当

This study extends the work we have previously done by reporting on both gas-phase and particulate phase PCB concentrations in Chicago air as well as giving a first report on airborne OH-PCBs in Chicago. Gas phase PCB concentrations ranged from 43.1 pg/m³ to 2250 pg/m³, with an average concentration of 594 pg/m³ ± 445 pg/m³, and exhibited strong temporal trends. Particulate phase PCBs accounted on average for 4.3% of total PCBs in a sample. OH-PCBs were detected in both the gas and particulate phase and exhibit characteristics of either emission sources or atmospheric reactions depending on the congener.

This thesis aims to prove the concept of replacing traditional electrical cabinets with PCBs on a fully electric boat. The existing solution with two electrical cabinets is considered expensive and believed to be replacable by PCBs.  Means of protections for PCBs are evaluated with regard to moisture, salt and vibrations. Two PCBs are designed to carry a current up to 60 ampere for a longer period of time. A cost analysis of 1, 10 and 100 PCBs are made to compare the cost of the proposed design to the existing solution. The result is a functioning prototype, a proposed design, cost analysis and suggested means of protections for withstanding the elements that the PCBs are exposed to at sea.Verification of the design is done by PDN Analysis and load testing with thermal imaging to monitor the temperature rise. Soley this is not enough to fully validate the design as further tests are needed and the local juristrictions has to be met before implementing these PCBs in consumer equipment.

This work deals with effects of nanoparticles, mainly copper and silver, on properities of lead-free solder pastes. It describes basic tests done on solder pastes according to IPC-TM-650 standards. In practical section this work focuses on the preparation of Sn-Bi solder paste and the measuring of viscosity. After that different concentrations of silver copper alloy nanoparticles are added to the SnBi solder paste. These solder pastes are tested by the IPC standarts and mechanical and resistive tests are done on printed circuit boards where the effects of mixed in nanoparticles are observed.

This thesis focuses on the design and implementation of the wireless localization module, using UWB technology with emphases on low-power firmwre based on RTOS. Wireless localization is based on TDoA algorithm.  The resulting HW module is designed as a four layer PCB, based on MCU crf52832 (ARM Cortex M4) and UWB module DevaWave DW1000. Firmware is implemented using FreeRTOS with emphasis on low power consumption. For hardware implementation, Eagle CAD was used. Firmware is implemented in C and Assembly programming languages.

In the assessment of the environment pollution level, bio indicators of vegetable or animal origin are often used. Bio indicators include also needles and moss. The samples of moss and needles taken in different locations in the Czech Republic were examined to find out the presence of xenobiotics of polychlorine biphenyls and polybromide diphenylethers types. Selected analytes have been extracted from the matrix by hexan. Extracts have been refined using column chromatography on mixed florisil/silicagel sorbent. To analysis of selected compounds, GC/ECD method has been chosen. Based on our results a comparison of the contamination level in individual locations was enabled.

Diploma thesis mainly deals with temperature management and calculation of temperature profile in oven by using SMD packages (PLCC, 1206) of different thermal capacitance on testing PCB. Above all shows theoretical consecution of temperature profile calculation in oven by using known mathematical method like the lumped capacitance method or finite difference method. Theoretical solution and measured values are compared. Diploma thesis also deals with fixation methods of thermocouples K type on assembly, comparison methods based on known and subexperiment, determines the deficiencies of methods. This thesis can perform as theoretical as well as experimental resource to prediction of temperature profiles of PCB´s with different assembly density.

The Master`s thesis gives the basic facts about realisation of HMI. It will measure and display the electric quantity of electric traction of the Marabu experimental aircraft. The HMI is possible to use for other difficult applications. The main part of the thesis is overviewed the graphic function library for LCD.

This paper describes the draft and implementation of a system for identifying failures on the soldered joints from already existing system, which is, however, limited by dependence of the operating system of the human factor. The innovated system provides us an automatic testing of soldered joints using a computer, with subsequent processing of data electronically using the corresponding software. The first part is devoted to the theory of the formation of flaws on the soldered joints and to the familiarization with uninnovated system. Subsequently, work continues with the practical part, which introduces us the procedure and implementation of the innovated system for identifying failures on the soldered joints. The final part of this paper is an evaluation of the results and fulfilment of work requirements.

This work includes the complete design of a prototype embedded system for displaying information from a vehicle. ELM327 chip is described and its basic use. Work also describes the development of the diagnostic socket for  vehicles in European countries. Also contains a complete description of developing schematic, printed circuit board and firmware implementation. The thesis describes the use of realtime operating system in embedded system.