The objective of this research is to determine and develop a model that is capable of accurately measuring customer satisfaction for different industries and in particularly for the Printed Wiring Boards (PWB) Manufacturers. The new model will incorporate data not being collected or utilized by the survey method of determining customer satisfaction. The method used is a weighted average of satisfaction among several researched categories with percentages that accurately represent the relative importance of multiple facets of the PWB manufacturers customer satisfaction. A very common term in quality assurance is that "What is not measured accurately can not be evaluated or managed correctly," thus customer satisfaction is a very important aspect of any business, industry, or government. A satisfied customer will do more business and recommend it to other potential customers. Thus the business will grow and more revenues result. On the other hand, an unsatisfied customer will abandon the business and encourage more customers not to get involved with the same business so the business may decline and lose its market share and profitability. The categories that contribute to PWB customer satisfaction will be determined by conducting surveys among the leaders and best in the business of the PWB industry in addition to discovery of related articles that define the categories of the customer satisfaction for the PWB manufacturers. Once the categories are determined, the research concentrates on the weighting of the categories that most contribute to the PWB customer's satisfaction and a measure of satisfaction is derived. The model is easily applied to any other kind of PWB business or service industry. The model is based on empirical methods that will give an accurate measurement for the PWB customer's satisfaction. This in turn allows organizations the opportunity for improving customer satisfaction and increasing market share. The algorithm is based on characteristics deemed important by customers. Thus the customer satisfaction index can be computed and monitored on a regular basis without costly surveys. The major difference between this new model and the standard methods of determining customer satisfaction using the surveys is that this model will utilize data available with the proposals, sales, shipping, receiving, quality, engineering, manufacturing, and purchasing departments. The developed method to measure customer satisfaction utilizing internal data can be more cost effective, more accurate, can provide individual customer satisfaction scores, can measure whether or not these individual scores are statistically lower than the majority, and can provide satisfaction measures in real time none of which can be supplied by the survey method.

This thesis investigates the impact of vibration isolators on circuit boards during harsh vibrationenvironments that occur when they are mounted on the wings of a fighter jet. To examine thisphenomenon, a mathematical model and a simulated model were developed to determine theresonant frequencies of the circuit board under various boundary conditions. Subsequently, theresonant frequencies of the circuit board were validated through experimental tests, allowing forthe establishment of the material properties of the circuit board. In order to prevent structuralfailure, this thesis employs α-gel dampers as the damped attachments for the circuit board.These vibration isolators belong to the category of silicone gel dampers and were evaluatedthrough experimental vibration testing. The two employed vibration isolators are denoted asmodels A1 and A2, exhibiting respective damping ratios of 0.1 and 0.05. By utilizing thesevibration isolators during the experimental vibration tests, the structure demonstrated resilienceagainst natural frequency coupling, thereby preventing failure. / Den här masteruppsatsen undersöker effekten av vibrationsisolatorer på kretskort under detuffa vibrationsmiljöer som sker vid vingarna på ett stridsflyg. För att undersöka detta såanvänds en matematisk modell samt en simulerad modell för att hitta resonansfekvensernaför kretskorten vid olika randvillkor. Resonansfrekvenserna från modellerna jämfördes medresonansfrekvenserna som kom tillhanda efter vibrationsprover och med dem så kunde ävenmaterialegenskaperna bestämmas. För att unvika kollaps av strukturen användes α-geldämpare till kretskorten. Dessa dämpare är gjorde av silikongel och utvärderades genomexperimentella vibrationsprover. Dessa vibrationsisolatorer var av modell A1 och A2 ochkorresponderande modell hade dämpningsförhållande 0.1 respektive 0.05. Genom att användadessa vibrationsiolatorer under de experimentella virbationstesterna så undvek strukturenkollaps genom att resonansfrekvenserna inte triggades.

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Recent development in electronics for mobile devices has led to the decrease in sizes and cost of autonomous complex embedded systems such as satellites. It is now possible to build a satellite quicker and only for a fraction of previous costs by using Commercial Off The Shelf (COTS) components. Yet, there are some obstacles that need to be overcome before a successful small satellite can be designed. Among these are the radiation environment, thermal issues, the overall system complexity and tight schedules. This thesis addresses these issues and proposes an overall approach for designing small satellites’ electronics. This approach can be summarised in 6 recommendations: Keep it simple Use fast hardware iterations Do not use space grade components Use a single string design on the system level (no redundancy) Design with limited trust in the software Use simple, accessible and easy updatable documentation With respect to those recommendations an on board data processing system, the Processing Board, has been designed for the ICEYE-1 satellite. The ICEYE-1 satellite is a fully commercial Synthetic Aperture Radar (SAR) satellite that will be launched in December 2017. The designed board has been manufactured and verified during airborne test campaigns. / Nya elektronikutvecklingar för mobiltelefoner har lett till en minskning av storlek och kostnader för andra autonoma komplexa inbyggda system som t.ex. satelliter. Så kallade småsatelliter kan numera byggas snabbare och för endast en bråkdel av tidigare kostnader med hjälp av Commercial Off The Shelf (COTS) komponenter. Det finns dock vissa hinder som måste övervinnas om man vill designa en pålitligt fungerande småsatellit. Till dessa kan räknas strålningsmiljön, väl fungerande värmeledning, det totala systemets komplexitet samt snäva tidtabeller. Detta examensarbete behandlar dessa frågor och föreslår en övergripande strategi för att designa elektronik för småsatelliter. Detta tillvägagångssätt kan sammanfattas i 6 rekommendationer: Håll det enkelt Implementera snabba hårdvaruiterationer Använd inte rymdklassade komponenter Använd ingen redundans på systemnivå Designa med en begränsad tilltro på mjukvaran Dokumentera på ett enkelt, tillgängligt och lätt uppdateringsbart sätt Dessa rekommendationer har använts till att utveckla ett databehandlingssystem, kallat "Processing Board", till småsatelliten ICEYE-1. ICEYE-1 är en kommersiell Synthetic Aperture Radar (SAR) satellit som kommer att skjutas i omloppsbana i december 2017. Databehandlingssystemet i fråga har utvecklats och verifierats i samband med flygplansburna testkampanjer.

Structural health monitoring (SHM) is damage detection strategy for aerospace, civiland mechanical infrastructure. This project tries to show that Lamb waves, that are being generated and sensed with piezoelectric transducers, can be used for damage detection in a SHM system. For these piezoelectric transducers to work, filtering and amplification circuits needs to be connected to them. This report include the design,simulation, assembly and testing of these circuits. Due to lack of time, it was not possible to generate and sense actual Lamb waves. The result of the thesis is thatsimulations and tests show that it is possible to generate and sense Lamb waves for damage detection in a SHM system / Structural health monitoring (SHM) är en skadedetekteringsstrategi för flyg-,civil- och mekanisk infrastruktur. Detta projekt försöker visa att Lambvågor, som genereras och avkänns med piezoelektriska givare, kan användas för skadedetektering i ett SHM-system. För att dessa piezoelektriska givare ska fungera krävs att filtrerings- och förstärkningskretsar är anslutna till dem. Denna rapport inkluderar design, simulering, montering och testning av dessa kretsar. På grund av tidsbrist var det inte möjligt att generera eller avkänna Lambvågor. Resultatet av examensarbetet är att simuleringar och tester visar att det är möjligt att generera och avkänna Lambvågor för skadedetektering i ett SHM-system.

Outer space is a very harsh environment that can cause electronics to not operate as they were originally intended. Aside from the extreme amount of radiation found in space, temperatures can also change very dramatically in a relatively small time frame. In order to test electronics that will be used in this environment, they first need to be tested on Earth under replicated conditions. Vanderbilt University designed a dewar that allows devices to be tested at these extreme temperatures while being radiated. For this thesis, a test setup that met all of the dewar's constraints was designed that would allow a 12-bit, 16-channel analog-to-digital converter to be tested while inside.

In this study, the wastewater generated from etching process of the Printed Circuit Board (PCB) was treated by a process including both acidification and coagulation/sedimentation and then followed by the catalytic wet air oxidation (CWAO) over different catalysts (either Pt/SiO2¡PAl2O3 or Pt¡PX/£^-Al2O3) process in series. Although the initial chemical oxygen demand (COD) concentration of the wastewater is as high as 7740-12700 mg/L, the effluent of the pretreatment process was measured to have COD value in ranges of 3050-4260 mg/L. Several re-action parameters, such as reaction temperatures (200-260¢J), oxygen partial pressures (0-3 MPa), and two kinds of catalysts were performed experimentally to investigate the COD reduction of the wastewater during the CWAO process. Both reaction temperature and variety of catalyst are found most effectively on the COD reduction. However, the effect of oxygen partial pressure on the COD reduction is just in little. Results showed that the COD reduction during the CWAO over the Pt¡PX/£^-Al2O3 catalyst process is the most significant, which with a tow-step re-action and both the two reactions do obey first-order reaction kinetics. A change from a higher reaction activity of the CWAO reaction to a slower one implies a decrease of the reaction rate. On basis of our experiments data, the effective operating conditions of CWAO for the COD reduction was observed to be at temperature of 260¢J under oxygen partial pressure of 2.0 MPa and at a retention time period of 60 min. The COD conversion was calculated as high as 75%; however, it could be enhanced up to 78% and 91%, respectively, when the CWAO was conducted in presence of the Pt/SiO2¡PAl2O3 and Pt¡PX/£^-Al2O3 catalysts, respectively. It can be seen that the organic compound of the wastewater was mineralized most completely (with a COD/TOC ratio of 3.7¡Ó0.2) after the CWAO over the Pt¡PX/£^-Al2O3 catalyst process. Furthermore, a higher COD/TOC ratio of 3.9¡Ó0.3 was achieved when the Pt/SiO2¡PAl2O3 catalyst was in presence of the CWAO process, and the primitive WAO process had the highest COD/TOC ratio of 4.8¡Ó0.4. The experimental data showed that both a higher reaction temperature (¡Ù260¢J) and an application of catalyst are more important factors for the min-eralization of the organic compound of the wastewater during the CWAO process. In our investigation, BOD5/COD ratio has been used to assess if the WAO and/or the CWAO process treatment yield products more amenable to biodegradation. The BOD5/COD ratio was 0.68-0.93 when the reaction temperature was above 220¢J and the retention time was as long as 60 min. Unfortunately, the BOD5/COD ratio of the effluent from the CWAO process came out a lower value (0.45-0.65) though it was under the same reaction conditions. It is probable that the biodegradable portion of the organic compounds of the wastewater were decomposed easier during the CWAO process than during the WAO process. In addition, it was found that the products of the wastewater was decomposed partially into CO2 and into some low molecular weigh acids, such as formic acid, acetic acid, propionic acid, etc. The activation energy with respect to COD was calculated to be 38.42 kJ/mole and 83 kJ/mole, respectively, for the first-step reaction and for the second-step reaction, respectively, of the WAO process. It was al-so calculated that the first-step reaction of the CWAO over the Pt/SiO2¡PAl2O3 catalyst process has activation energy of 18.25 kJ/mole and 25.76 kJ/mole is for the second-step reaction. However, 16.05 kJ/mole and 49.61 kJ/mole are calculated for the first-step and the sec-ond-step reactions, respectively, of the CWAO over the Pt¡PX/£^-Al2O3 catalyst process. It can be seen that the application of both the Pt/SiO2¡PAl2O3 and the Pt¡PX/£^-Al2O3 catalysts has a significant effect on reducing the activation energy of the WAO. It was observed that the total COD conversion of the wastewater is as high as 96% and the BOD5/COD ratio of the effluent has been en-hanced up to more than 0.6. The combination of both the CWAO over the Pt¡PX/£^-Al2O3 catalyst and the biological treatment is a promising tech-nique for the PCB¡¦s wastewater treatment to fit the wastewater control regulation in Taiwan, which requests the COD value of the wastewater discharged should be less than 120 mg/L.

Outer space is a very harsh environment that can cause electronics to not operate as they were originally intended. Aside from the extreme amount of radiation found in space, temperatures can also change very dramatically in a relatively small time frame. In order to test electronics that will be used in this environment, they first need to be tested on Earth under replicated conditions. Vanderbilt University designed a dewar that allows devices to be tested at these extreme temperatures while being radiated. For this thesis, a test setup that met all of the dewar's constraints was designed that would allow a 12-bit, 16-channel analog-to-digital converter to be tested while inside.

In this study, the plant layout problem of a worldwide Printed Circuit Board (PCB) producer company is analyzed. Machines are grouped into cells using grouping methodologies of Tabular Algorithm, K-means clustering algorithm, and Hierarchical grouping with Levenshtein distances. Production plant layouts, which are formed by using different techniques, are evaluated using technical and economical indicators.