<p>The goal of this project was to together with Cochlear Bone Anchored Solutions AB develop a new cleaning tool for their Baha‐systems. Cochlear BAS AB is a daughter company to Cochlear Limited based in Sydney, Australia. Cochlear BAS AB is situated in Gothenburg and with its 150 employees develop and manufacture the Baha‐system. Baha is a bone anchored hearing aid which involves a minor surgery placing a titan implant, or abutment in the skull bone behind the client’s ear. By placing a sound processor which converts sound into vibrations on the abutment which then acts as a pathway for the vibrations to reach the skull and finally the cochlea giving clients improved hearing. Due to the fact that the skin never really fuses with the abutment daily cleaning is required of and two centimeters around the abutment. Today Cochlear BAS AB offers its clients a toothbrush with extra soft tip as cleaning tool. The goal is to cover today’s cleaning need with a, for the market, new product which fulfills all requirements set on the product by Cochlear BAS AB.</p><p>The group started by gathering lots of information of and about the Baha‐system as well as different types of cleaning methods used today. Creative methods were used to generate ideas on solving the problem. Four different concepts where put together based on all the information gathered, they were:</p><p>1. Brush – A reengineering of today’s cleaning tool.</p><p>2. Spray – Clean the abutment with a spray in an enclosed system.</p><p>3. Ultrasonic cleaning – Also called the electronic brush.</p><p>4. Topz – An easy to use and hygienic alternative.</p><p>These concepts were then presented to the company where they were evaluated together with the group and a decision was made to continue with the ultrasonic cleaning concept. The decision was followed by another information‐ and idea generating phase and the hunt for components was started. The piezo ceramics, the component creating the vibrations, was proven very difficult to find but the group were finally able to place an order of 3 pieces at a Japanese company through a contact in Sweden. Together with a teacher in electronics from school the other necessary components for the prototype were identified and ordered from ELFA.</p><p>This concept offers a cleaning tool which cleans efficiently and gently with ultrasonic technology in a compact en easy to use package. Ultrasonic cleaning is effective since it reaches in all nooks and crannies but is mild at the same time, it could even help heal the skin around the abutment. The product has a round shape and an attractive exterior with simple and smart functions built into it.</p><p>On and off with the entire top of the product which doubles as a button. The cleaning process itself could be as follows: The easy-to-use device is filled with gel or another medium in cup on the bottom of the product, the cup is then placed over the abutment and you start the device and let it run for about 30 seconds. After it’s done you remove the cleaning device and you rinse or towel the area around the abutment dry. All the dirt is flushed away with the gel and the abutment and the area around it is left clean.</p>

The goal of this project was to together with Cochlear Bone Anchored Solutions AB develop a new cleaning tool for their Baha‐systems. Cochlear BAS AB is a daughter company to Cochlear Limited based in Sydney, Australia. Cochlear BAS AB is situated in Gothenburg and with its 150 employees develop and manufacture the Baha‐system. Baha is a bone anchored hearing aid which involves a minor surgery placing a titan implant, or abutment in the skull bone behind the client’s ear. By placing a sound processor which converts sound into vibrations on the abutment which then acts as a pathway for the vibrations to reach the skull and finally the cochlea giving clients improved hearing. Due to the fact that the skin never really fuses with the abutment daily cleaning is required of and two centimeters around the abutment. Today Cochlear BAS AB offers its clients a toothbrush with extra soft tip as cleaning tool. The goal is to cover today’s cleaning need with a, for the market, new product which fulfills all requirements set on the product by Cochlear BAS AB. The group started by gathering lots of information of and about the Baha‐system as well as different types of cleaning methods used today. Creative methods were used to generate ideas on solving the problem. Four different concepts where put together based on all the information gathered, they were: 1. Brush – A reengineering of today’s cleaning tool. 2. Spray – Clean the abutment with a spray in an enclosed system. 3. Ultrasonic cleaning – Also called the electronic brush. 4. Topz – An easy to use and hygienic alternative. These concepts were then presented to the company where they were evaluated together with the group and a decision was made to continue with the ultrasonic cleaning concept. The decision was followed by another information‐ and idea generating phase and the hunt for components was started. The piezo ceramics, the component creating the vibrations, was proven very difficult to find but the group were finally able to place an order of 3 pieces at a Japanese company through a contact in Sweden. Together with a teacher in electronics from school the other necessary components for the prototype were identified and ordered from ELFA. This concept offers a cleaning tool which cleans efficiently and gently with ultrasonic technology in a compact en easy to use package. Ultrasonic cleaning is effective since it reaches in all nooks and crannies but is mild at the same time, it could even help heal the skin around the abutment. The product has a round shape and an attractive exterior with simple and smart functions built into it. On and off with the entire top of the product which doubles as a button. The cleaning process itself could be as follows: The easy-to-use device is filled with gel or another medium in cup on the bottom of the product, the cup is then placed over the abutment and you start the device and let it run for about 30 seconds. After it’s done you remove the cleaning device and you rinse or towel the area around the abutment dry. All the dirt is flushed away with the gel and the abutment and the area around it is left clean.

Thesis (Ph. D.)--Ohio State University, 2004. / Document formatted into pages; contains xvi, 111 p. Includes bibliographical references. Abstract available online via OhioLINK's ETD Center; full text release delayed at author's request until 2005 Dec. 20.

Thesis (Ph. D.)--Virginia Polytechnic Institute, 1966. / Vita. Abstract. Includes bibliographical references (leaves 80-83). Also available via the Internet.

No description available.

Thesis (M.S.)--University of Michigan, 1984.

Thesis (M.S.)--University of Michigan, 1984.

This investigation was undertaken to determine the effectiveness of ultrasonic energy in removing spray residue from collards, to determine its effect on the content of ascorbic acid and carotene levels in the treated tissues, and to investigate the influence of ultrasonic energy on the respiratory activity and the histological changes of the tissues involved. / Ph. D.

The objective of this research was to demonstrate the application of ultrasound to field sites having problems with precipitation build up and corrosion. PTW s are passive reactive walls containing zero-valent iron metal for in-situ remediation of contaminated groundwater. However, loss of reactivity over time due to build up of corrosion and other precipitates on the iron surface is a major concern. Ultrasound energy has been established as an effective tool for revitalizing iron surface. This research applied ultrasound energy to a zero-valent iron wall constructed below the ground surface to remove precipitates and iron corrosion, increasing iron reactivity. Two field sites were selected for the ultrasound application research project. These sites have PTWs installed for the remediation of chlorinated compounds such as TCE and its daughter products. The first site is located at Launch Complex 34 (LC 34), Cape Canaveral Air Station, Florida. The second site is located at Denver Federal Center, Lakewood, Colorado. The ultrasound was applied to these sites by introducing an ultrasonic transducer in wells installed within the wall or just upstream of the wall and then applying ultrasonic energy to the entire depth of the wall. The apparatus used for ultrasound application was an omni-directional tubular resonator. Two such ultrasound units with frequencies of 25 kHz and 40 kHz were used for ultrasound treatment. Kinetic batch studies were performed on iron samples taken before and after ultrasound treatment. The degradation rate constants and half-life values for TCE were then calculated and con1pared for pre-ultrasound and post-ultrasound iron san1p les. Sin1ultaneously grounchvater \vas analyzed for di ffercnt VOCs. Soni cation period as brief as 30 n1inutes sho\vcd signi fie ant in1pact on the firstorder rate constants for TCE degradation. An increase in sonication period proved to be even n1ore effective. A sonication period of 90 n1inutes decreased TCE half-life by 30-40% for the 40-kHz resonator and 60-75~o for the 25-kHz resonator, for both the field sites. The 25-kHz resonator proved to be more effective than the 40-kHz resonator. For both field sites, ultrasound treatn1ent significantly increased TCE degradation rates, indicating a ren1oval of corrosion products and precipitates from the iron surface due to ultrasound. This technology has shown a great potential in revitalizing iron reactivity, effectively increasing the PTW life expectancy.

Resumo: O objetivo deste trabalho foi avaliar cinco hipóteses: a) o condicionamento ácido diminui a resistência à flexão de uma cerâmica feldspática; b) a cimentação aumenta os valores de resistência à flexão de uma cerâmica feldspática; c) o processo de neutralização dos precipitados do ácido fluorídrico diminui os valores de resistência à flexão de uma cerâmica feldspática; d) a limpeza sônica (ultra-som) com água deionizada dos precipitados do ácido fluorídrico, formados sobre a superfície cerâmica após o condicionamento ácido, aumenta os valores de resistência à flexão de uma cerâmica feldspática; e) a associação entre o processo de neutralização dos precipitados do ácido fluorídrico e a limpeza sônica melhora a resistência à flexão de uma cerâmica feldspática. Foram confeccionadas 60 barras cerâmicas (20x4x1.2mm) (VM7 VITA Zahnfabrik). Cada barra cerâmica (1face) (exceção G1) foi condicionada (20s) com AF10% (Dentsply), seguida pela lavagem jato ar-água (60s) e secagem. Foram selecionadas aleatoriamente e separadas em 6 grupos(n=10): G1 - Controle (sem tratamento); G2 - condicionamento ácido apenas; G3 - o silano(Porcelain Primer,BISCO) foi aplicado na superfície cerâmica seguido da cimentação resinosa (Rely X ARC/3M); G4 - as barras foram imersas (40s) em solução supersaturada de bicarbonato de sódio, lavadas jato ar-água por (5s) e secas antes da aplicação do silano e cimentação; G5 - limpeza sônica (4min), silano e cimentação; G6 - associação da neutralização e limpeza sônica, seguido da silanização e cimentação. Após armazenagem (água destilada/sete dias a 37ºC), cada conjunto cerâmica/cimento) foi levado ao dispositivo de ensaio, sendo este acoplado em uma máquina de ensaios universal (EMIC) com célula de carga de 10Kgf, velocidade de 1,0mm/min e submetidos ao ensaio mecânico de flexão 3 pontos... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The purpose of this study was to evaluate five hypotheses: a) hydrofluoric acid etching decreases the flexural strength of a feldspathic porcelain; b) cementation increases the flexural strength of a feldspathic porcelain; c) the neutralization process of hydrofluoric acid precipitates decreases the flexural strength of a feldspathic porcelain; d) hydrofluoric acid precipitates cleaning with ultrasonic bath in deionized water, formed on the ceramic surface after acid etching, increases flexural strength values of a feldspathic porcelain; e) the association between the neutralization process of the hydrofluoric acid precipitated and ultrasonic sonic cleaning improves the flexural strength of a feldspathic porcelain. Sixty ceramic bars (20x4x1.2mm) (VM7 VITA Zahnfabrik) were made and each one (1 surface) (except G1) was etched (20s) with HF10% (Dentsply), followed by water spray (60s) and drying. The specimens were randomly divided into 6 groups (n=10): G1 - Control (no treatment); G2 - hydrofluoric acid; G3 - silane(Porcelain Primer,BISCO) was applied on porcelain surface followed adhesive cementation (Rely X ARC/3M); G4 - the bars were immersed on a oversaturated sodium bicarbonate solution (40s), washed by water spray (5s) and drying before silane application and cementation; G5 - ultrasonic cleaning (4min), silane and cementation; G6 - association between neutralization and ultrasonic cleaning, followed by silanization and cementation. After storage (distillated water/ 7 days at 37ºC), each set (ceramic/cement) was carry to test device, which was mounted in universal test machine (EMIC) with a load cell of 10 Kgf, crosshead speed of 1,0mm/min, and submitted to the three-point bending mechanical test (immersed on water at 37 ºC). The flexural strength values and standard deviation (MPa) of the groups were: G1: 73,79±5,83a; G2: 60,65±10,07b; G3: 85,10±12,40a; G4: 80,91± ... (Complete abstract click electronic access below) / Orientador: Estevão Tomomitsu Kimpara / Coorientador: Tarcísio José de Arruda Paes Junior / Banca: Eduardo Piza Pellizzer / Banca: Maximiliano Piero Neisser / Banca: Rander Pereira Avelar / Banca: Rubens Nisie Tango / Doutor