Готові списки джерел за темами / Bio-medical Application

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Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Bio-medical Application"

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Bandegiri, Mr Ajinkya A., and Dr Pradip C. Bhaskar. "Run-Time Re-configuration using FPGA for Bio-Medical Application." International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (April 30, 2018): 707–11. http://dx.doi.org/10.31142/ijtsrd10975.

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2

KOMOTORI, Jun, and Yutaka KAMEYAMA. "FPB Treament for Bio-Medical Application." Journal of the Japan Society for Precision Engineering 72, no. 9 (2006): 1083–86. http://dx.doi.org/10.2493/jjspe.72.1083.

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3

NAGATSU, Masaaki, Enbo YANG, Han CHO, Akikazu SAKUDO, and Kazuyoshi IKUTA. "Bio- and Medical-Application of Plasma-Functionalized Nanoparticles." Hyomen Kagaku 34, no. 10 (2013): 535–40. http://dx.doi.org/10.1380/jsssj.34.535.

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4

Manoharan, Anto Merline, and Vimalathithan Rathinasabapathy. "Secured Communication for Remote Bio-Medical Monitoring System Using LoRa." Sensor Letters 17, no. 11 (November 1, 2019): 888–97. http://dx.doi.org/10.1166/sl.2019.4146.

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Анотація:
Recent advancement in IoT technology made profound changes in life style of people. Ease of access of information through smart phones becomes attractive. Everyone like to access datas through their smart phones. IoT enabled application fulfils this requirements. Researchers focusses on developing the Smart monitoring system using IoT. Since these IoT applications uses existing cellular network for accessing internet. Research says that 50 Billion devices will be willed worldwide in 2020. Providing connectivity to these applications is a challenging task. The existing 4G-LTE network could not support for these much number of devices. Hence an alternative IoT-LoRa network is proposed for these type of application. In this research, a special application in Bio-Medical monitoring System is developed using LoRa Communication. BioMedical Parameters like Weight, Blood Pressure, Heart beat, Body temperature are measured, encrypted using AES to provide security and transmitted using LoRa to monitoring system through Gateway. The developed system satisfies the need for elderly persons suffering from disabilities and reduces the time for the care taker to monitor the data. Also the proposed system is highly secured. Our research says, in near future IoT will play vital role in Bio Medical application and Connectivity, Security will be some of the challenging issues in implementation. Without addressing these problems, Bio-Medical Monitoring System cannot be prognosticated. Finally the potentiality of IoT in Medical field is discussed.
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5

Zhou, Xia Ping, Yi Chao Zhang, Shi Wan Zhang, Wei Jing Ban, Wen Feng Yu, and Zhao Zhang. "New Progress in Medical Research of Bio-Humic Acid." Applied Mechanics and Materials 138-139 (November 2011): 1228–33. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.1228.

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Humic acids are biological macromolecules. It has been 500 years since “WU-JIN-SAN” (i.e. humic acid) reported in Compendium of Materia Medica. In recent 30 years tens of medical companies and institutions have done regular clinical trials, toxicological and harmacological research on bio-humic acids. Besides, German, Polish, Swiss, Finland et al. have also done similar research, with the similar efficacy of Chinese herbal medicine like “Streagthening Vital Qi's Capacity to Resist Pathogens”, “Readjusting Yin and Yang”, “remedy defects and rectify errors” which build a scientific fundament for medical application of bio-humic acid. Although bio-humic acids was relatively weak in pharmacological studies, it was still traceable. As a drug, how to make a prescription in the pharmacopoeia? This is the key issues which affect the progress in humic medical research. The author consider: First, the use of low-carbon biodegradation reduces the complexity of bio-humic acid molecules,then acoording to the active component by bio-humic acid, Pharmacological-pharmacodynamic, and determining the scope of medical applications could gradually overcome the bottleneck of medical research in bio-humic acid, accelerat the progress of medical research of bio-humic acid.
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6

Ham, Young-Bog, Byeung-Cheol An, Mojiz Abbas Trimzi, Jong-Dae Kim, Gi-Tae Lee, Jung-Ho park, and So-Nam Yun. "Experiments of Micro Jet Injection for Bio-Medical Application." Transactions of the Korean Society of Mechanical Engineers B 40, no. 10 (October 1, 2016): 681–87. http://dx.doi.org/10.3795/ksme-b.2016.40.10.681.

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7

NAKATANI, Tatsuyuki. "Application of Bio-compatible DLC Coatings to Medical Devices." Journal of the Surface Finishing Society of Japan 67, no. 6 (2016): 279–83. http://dx.doi.org/10.4139/sfj.67.279.

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8

Endo, M. "Basic science and bio/medical application of carbon nanotubes." Nanomedicine: Nanotechnology, Biology and Medicine 2, no. 4 (December 2006): 280. http://dx.doi.org/10.1016/j.nano.2006.10.058.

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9

Sajid, Ibadullah, Uzma Ashiq, and Raja Imran Sajid. "Paradigm Shifting From Bio-Medical to Bio-Psycho-Social and Role of Medical Social Work." Pakistan Journal of Medical and Health Sciences 15, no. 5 (May 30, 2021): 1047–50. http://dx.doi.org/10.53350/pjmhs211551047.

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Анотація:
The health miseries emerged after the horrific incident of Second World War challenged the bio-medical model dominating the healthcare perceptions during the 19th century. The healthcare interventions in post war years have had to change toward a new idea, the social perspective of health. In 1977, Engel introduced a new approach “bio-psycho-social” (BPS) which emphasized that merely bio-medical intervention by ignoring the psycho-social determinants cannot be helpful in achieving absolute recovery. Although this paradigm shift in healthcare was widely acknowledged but the application of the approach is limited. In the context, the role of Medical Social Work, a profession focused on the reduction of the psycho-social and environmental determinants of health for absolute recovery, is considerable. This review study concludes that the interventions of Social work profession with its unique attributes such as breadth, holistic care and believe in absolute rehabilitation, can make the health system more responsive. Keywords: Healthcare, determinants, Medical Social Work, Social, Psychological
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10

TANAKA, Yoshihiro, Kazuki DOUMOTO, Akihito SANO, and Hideo FUJIMOTO. "BIO-09 EXPANSION OF BALLOON ON SOFT OBJECT AND ITS APPLICATION TO TACTILE SENSOR(Bio-medical Equipments III,Technical Program of Oral Presentations)." Proceedings of JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment : IIP/ISPS joint MIPE 2009 (2009): 313–14. http://dx.doi.org/10.1299/jsmemipe.2009.313.

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Дисертації з теми "Bio-medical Application"

1

Nagai, Andrii. "Investigation of SiPM physics parameters down to cryogenic temperatures and for a bio-medical application." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS552/document.

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Les Photomultiplicateurs Silicium (SiPM) sont devenus aujourd’hui des détecteurs de lumière visible, applicables dans de nombreux domaines comme la Physique des Hautes Énergies, les expériences Neutrinos, la détection de fluorescence, pour des applications de biophotonique ou d’imagerie médicale. La première partie de ma thèse concerne l’étude des divers paramètres physiques des SiPM en fonction de température T. En particulier, des composants récents (2015) de KETEK ayant diverses caractéristiques technologiques comme des jonctions p/n ou n/p, avec ou sans « trench » entre cellules, différentes épaisseurs de couches épitaxiales, etc… ont été étudiés dans la gamme de T de 308.15 K (+35°C) à 238.15 K (-35°C). En plus, des composants Hamamatsu de production 2011, ainsi que de production 2015 avec des caractéristiques technologiques améliorées (faible bruit), ont été testés dans la gamme 318.15 K (+45°C) à 98.15 K (-175°C). Pour ces études, j’ai participé à la conception, l’installation, la mise en service et la calibration d’un banc cryogénique destiné aux caractérisations électriques, optiques, et en température, des SiPM. J’ai développé une procédure d’analyse automatisée, capable de traiter en un temps très court une énorme quantité de données expérimentales (i.e. dizaines de Gb/détecteur), et de fournir une information rapide et précise sur les principaux paramètres et leur dépendance en T. J’ai développé un modèle physique décrivant les courbes IV en DC pour différentes T. Ce modèle proposé reproduit bien la forme de la courbe IV dans une large gamme de courants allant de 10⁻¹² à 10⁻⁵ A sur toute la zone de fonctionnement des divers détecteurs. Ainsi, le modèle IV peut être utilisé comme un outil simple et rapide pour déterminer les paramètres du SiPM comme le VBD, la forme de la courbe PGeiger en fonction de Vbias, ainsi que la plage des tensions de fonctionnement. La comparaison de ces paramètres avec ceux obtenus en mesure AC, et analysés par la procédure automatisée, sont en bonne concordance. La seconde partie de ma thèse a porté sur l’étude de composants SiPM spécialement adaptés à une application biomédicale. Il s’agit d’une sonde intracérébrale, sensible à l’émission β (Nβ) de molécules marquées par un traceur radioactif, injectées dans le cerveau d’un animal vivant. Le but étant de construire un nouveau "modèle animal" de maladies humaines telles que les maladies neuro-dégénératives ou neuropsychiatriques et la croissance de tumeurs. Cette sonde se compose d’un SiPM de très petite taille, bas bruit, couplé à une fibre scintillante, suivie d’une électronique de lecture spécifique, miniaturisée, à faible consommation. Ces SiPM ont été choisis comme les plus adaptés à notre application : deux SiPM de KETEK de 0.5x0.5 mm² (spécialement développés par cette compagnie pour nos besoins), et un SiPM standard de 1.3x1.3 mm² de Hamamatsu, tous ayant des μ-cellules de 50 × 50 μm². Pour chaque composant, les paramètres G, DCR et la sensibilité β ont été mesurés en fonction de Vbias et T. Les résultats obtenus montrent que le faible champ de vue des nouvelles structures KETEK permet une bonne amélioration du DCR. Cependant ce faible champ de vue entraîne une perte de collection de lumière due à l’épaisseur de la couche de résine époxy de protection, et à l’angle d’acceptante de la fibre. Comme la sensibilité β est un compromis entre le PDE et le DCR, les SiPM de KETEK montrent au final des performances voisines de celles de Hamamatsu. Les résultats préliminaires démontrent que la sensibilité β de KETEK peut être améliorée significativement en utilisant une lentille de focalisation entre la fibre scintillante et le SiPM, ou en diminuant l’épaisseur de la couche de résine époxy de protection
Silicon PhotoMultiplier (SiPM) detector has become a suitable visible light/photon detector for many applications like high energy physics and neutrino experiments, fluorescence detection, bio-photonics and medical imaging. The first part of my thesis was oriented to the studies of SiPM physics parameters as a function of temperature. Particularly, recent KETEK devices (year 2015) with different technological characteristics like p/n and n/p junctions, with and without trench technology, and different widths of epitaxial layer were studied in the temperature range from 308.15 K (+35°C) down to 238.15 K (-35°C). In addition, the Hamamatsu devices from 2011 production run as well as new devices from 2015 year, with improved technological characteristics inducing a reduced noise, were investigated in a wider temperature range from 318.15 K (+45°C) down to 98.15 K (-175°C). For these purposes, I participated to the design, installation, commissioning and calibration of a cryogenic experimental setup dedicated to electrical, optical and temperature studies of SiPM devices. Also, I have developed an automatic analysis procedure able to handle in a short time an impressive quantity of experimental data (i.e. tens of Gb/device) and to give a precise and fast information on main SiPM parameters and their temperature dependence. I have also developed a physical modeldescribing the DC I-V curves of SiPM detectors at different temperatures. The proposed model fits well the shape of IV curve in a very large currents range from 10⁻¹² A up to 10⁻⁵ A over the full working range of various devices. Consequently, the IV model can be used as a simple and fast method for determination of SiPM parameters like breakdown voltage VBD, the shape of Geiger triggering probability PGeiger as a function of Vbias as well as the Vbias working range. The comparison of these parameters with those calculated from AC measurements and analyzed by the automatic procedure showed a good agreement. The second part of my thesis was oriented to the study of SiPM devices and their physical parameters required to build a prototype of betasensitive intracerebral probe. Such probe is dedicated to measure the local concentration of radiolabeled molecules on awake and freely moving animal and to study new animal models of human disorders (neurodegenerative diseases, tumor growth, and neuropsychiatric disorders). It is composed of small size, low-noise SiPM device coupled to a scintillating fiber and readout by a dedicated miniaturized low-power consumption electronics. Three SiPM devices have been chosen as the most adapted for our application: two small KETEK devices of 0.5×0.5 mm² size (with and without optical trenches, specially developed by KETEK to fulfill our requirements) and a standard Hamamatsu device of 1.3×1.3 mm² size, all devices having 50 × 50 μm² μcell size. For each SiPM the gain G, dark count rate DCR and beta sensitivity were measured as a function of Vbias and temperature. The obtained results showed that the small field of view and newly developed structure of the KETEK devices allow a large decrease of the dark count rate DCR. However, this small field of view also leads to a reduced light collection due to the thickness of the epoxy protection resin on top of the SiPM and the acceptance angle of the fiber. Since the beta sensitivity represents a tradeoff between photon detection efficiency PDE and dark count rate DCR, KETEK SiPMs exhibit similar performances in comparison with the Hamamatsu device. Preliminary results demonstrate that the beta sensitivity of KETEK devices can be significantly improved by using focusing lens between the scintillating fiber and the SiPM or by reducing the thickness of its epoxy protection resin
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2

Iga, Arthur Michael. "Development of novel flourescent nancocrystals ( Quantum dots) coated with a silica nanocomposite polymer for bio-medical application." Thesis, University College London (University of London), 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505289.

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3

Puybareau, Elodie. "Motion analysis for Medical and Bio-medical applications." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1063/document.

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Анотація:
L’analyse du mouvement, ou l’analyse d’une séquence d’images, est l’extension naturelle de l’analyse d’images à l’analyse de séries temporelles d’images. De nombreuses méthodes d’analyse de mouvement ont été développées dans le contexte de la vision par ordinateur, incluant le suivi de caractéristiques, le flot optique, l’analyse de points-clef, le recalage d’image, etc. Dans ce manuscrit, nous proposons une boite a outils de techniques d’analyse de mouvement adaptées à l’analyse de séquences biomédicales. Nous avons en particulier travaillé sur les cellules ciliées qui sont couvertes de cils qui battent. Elles sont présentes chez l’homme dans les zones nécessitant des mouvements de fluide. Dans les poumons et les voies respiratoires supérieures, les cils sont responsables de l’épuration muco-ciliaire, qui permet d’évacuer des poumons la poussière et autres impuretés inhalées. Les altérations de l’épuration mucociliaire peuvent être liées à des maladies touchant les cils, pouvant être génétiques ou acquises et peuvent être handicapantes. Ces maladies peuvent être caractérisées par l’analyse du mouvement des cils sous un microscope avec une résolution temporelle importante. Nous avons développé plusieurs outils et techniques pour réaliser ces analyses de manière automatiques et avec une haute précision, à la fois sur des biopsies et in-vivo. Nous avons aussi illustré nos techniques dans le contexte d’éco-toxicité en analysant le rythme cardiaque d’embryons de poissons
Motion analysis, or the analysis of image sequences, is a natural extension of image analysis to time series of images. Many methods for motion analysis have been developed in the context of computer vision, including feature tracking, optical flow, keypoint analysis, image registration, and so on. In this work, we propose a toolbox of motion analysis techniques suitable for biomedical image sequence analysis. We particularly study ciliated cells. These cells are covered with beating cilia. They are present in humans in areas where fluid motion is necessary. In the lungs and the upper respiratory tract, Cilia perform the clearance task, which means cleaning the lungs of dust and other airborne contaminants. Ciliated cells are subject to genetic or acquired diseases that can compromise clearance, and in turn cause problems in their hosts. These diseases can be characterized by studying the motion of cilia under a microscope and at high temporal resolution. We propose a number of novel tools and techniques to perform such analyses automatically and with high precision, both ex-vivo on biopsies, and in-vivo. We also illustrate our techniques in the context of eco-toxicity by analysing the beating pattern of the heart of fish embryo
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4

Wu, Hao. "Efficient Algorithms for Applications in Bio-medical Data Processing." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23411.

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In this thesis, new high-performance algorithms and machine learning models are developed to solve challenging problems in the bio-medical field. We first focus on developing high performance parallel algorithms for all pairwise computation in bio-informatics applications such as construction of transcription factor interaction networks. We then develop an automatic optic disc detection algorithm using sparse dictionary learning in retinal images for the medical field. All pairwise computation is defined as performing computation between each and every pair of the elements in a given data set. Many of such applications require multiple terabytes of main memory and take multiple peta floating point operations to complete. Thus, large HPC clusters and highly efficient parallel algorithms are vital. Traditional methods for large scale distributed computing usually suffer from scalability issues. This thesis introduces some new effective and efficient parallel algorithm designs. We first design an efficient one-dimensional (1D) ring algorithm which doubles the block size compared to traditional ring algorithms and reduces the total communication cost by half. Based on the 1D ring we further develop a two-dimensional (2D) ring algorithm. When increasing the compute nodes, instead of reducing the block size, we make multiple copies of the original data blocks in the 1D ring and distribute them across the added compute nodes in the other dimension. By properly organizing the compute nodes the communication overhead can be reduced to a minimum. Experiments on supercomputer show that our new algorithms perform better in efficiency and scalability compared to conventional methods for large scale all pairwise computation in bio-informatics applications. The optic disc is one of the most important fundus structures in the retinal image of the human eye. Effective and accurate detection of the optic disc in a colour retinal image is a challenging topic. Inspired by the fact that humans can locate optic disc in a retinal image by observing local features, a local feature spectrum analysis (LFSA) method is proposed in this thesis. A local feature dictionary is defined for the reconstruction process of optic disc candidate images. The frequency of each atom, or spectrum in the dictionary is utilized along with sparse dictionary selection method for classification. Our innovative approach can effectively detect optic disc in a retinal image and the influence caused by the variable spatial positions of local features can be effectively reduced. Unlike most conventional approaches, segmentation of blood vessels is not required in our method. Our LFSA method is simple and robust, making it one of the best options for automated screening systems in medical image processing. Performance evaluation of our approach is conducted with the largest publicly available data set and comparisons against conventional approaches are made. Results indicate that the LFSA method achieves more accurate and reliable optic disc detection results.
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5

Alhazime, Ali. "Development of novel compact laser sources for bio-medical applications." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/ec837854-dd0c-44bb-9b1c-dd4a1fa181d3.

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Анотація:
The focus of this thesis relates to the development and characterisation of novel semiconductor based lasers sources tunable in the broad spectral ranges that are unattainable by conventional lasers due to a lack of suitable laser gain materials. Within the first part, the broad gain spectrum from quantum dot (QD) materials is seen to be an appealing feature for the development of broadly tunable lasers, broadband amplifiers and ultra short pulse generation. As has been previously shown quantum-dot external-cavity passively mode-locked lasers (QD-ECMLLs) are excellent candidates for versatile ultra short pulse generation. This is due to the flexibility that anexternal-cavity mode-locking configuration can offer in terme of a broad tunability for both repetition rate and wavelength which could be achieved. Similarly quantum-dot semiconductor optical amplifiers (QD-SOA) are suitable for the broadband pulse power amplification. Furthermore, master oscillator power amplifier (MOPA) picosecond optical pulse sources using all chirped QD structures were investigated using the MOPA system consisting of two parts, firstly QD-ECMLL and secondly a tilted taper QD-SOA. A further investigation involved a comparison between 1st-order diffraction grating and 2nd-order diffraction grating for this tunable QD-MOPA. The result found was the maximum fundamental mode-locking (FML) wavelength tuning range. Nearly 100 nm (from 1187nm to 1283nm) wavelength tuning range was achieved under a 900 mA current applied to the gain chip with a 2nd-order grating diffraction. Furthermore it was also demonstrated that the peak power spectral density achieved with the 2nd-order diffraction (max; 31.4dBm/nm) is much higher (2-4dB) than that from the 1st-order diffraction under similar conditions. The narrowest optical spectrum width was achieved from the 2nd-order diffraction and the narrowest pulse of 13 ps was found for the setup with the 1st-order diffraction grating. The wavelength tuning range from both orders can be amplified by increasing the injection current of the gain chip without deteriorating the stability of FML. The second part of this thesis focussed on experimental testing of EP-VECSELs, also known as electrically-pumped semiconductor disc lasers (SDLs), which produce high multi watt output power with diffraction limited output beam profile. EP-VECSELs have great potential within the applications where the watt level CW output power and mode-locked light with picosecond pulses sources are required.
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6

Hasan, Saad Ahmed. "Design of low power electronic circuits for bio-medical applications." Thesis, University of Liverpool, 2011. http://livrepository.liverpool.ac.uk/3024667/.

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Анотація:
The operational transconductance amplifier, OTA is one of the basic building blocks in many analogue circuit applications. The low power consumption is an essential parameter in modem electronic designs for many areas particularly for portable devices and biomedical applications. For biomedical applications, the low- power low-voltage OTA-C filters operating at low-frequency ranges are desired. The low-power, low-voltage operation of electronic devices is very important for applications such as hearing aids, pacemakers, and EEG. The importance of such operation is due to the need to implant these electronic circuits inside the body of the patient for long times before re-charging or replacing the batteries as for pacemakers and future hearing aids. The small size lightweight wearable EEG systems are preferable for applications ranging from epilepsy diagnosis to brain-computer interfaces. The low power consumption is achieved by operation at very small levels of current. So, in such applications the operation in the nano-ampere current range is essential to ensure power consumption of nW or few uW. Such very small currents are obtained through the operation of MOS transistors in their sub-threshold regime. The design space in such applications is restricted by their specifications which in turn based on the nature of the application. In this work, the design and implementation of OTA-C filter topologies for two bio-medical applications are made and discussed. Those applications are represented by hearing aids and EEG applications. In hearing aids, the work focused on cochlear implant and specifically on its most important stage represented by the filter. Four OTA-C filter topologies are proposed and two of them are tested experimentally. For the filter in a hearing aid system, besides its low power operation, it is required to operate with a relatively high dynamic range of 60dB and above. The dynamic range is the operation space of the filter that specified by the range of signals which can process properly. It is bounded by the maximum power signal less than its distortion overhead level to the minimum power signal more than its noise floor. The maximum signal level the filter can perform properly represents its input linear range. The challenge in CMOS OTA sub-threshold operation is the very small input linear range which makes it extremely difficult to build low-power consumed OTA-C filters with a wide dynamic range, DR. In this work, an OTA with an input linear range of ±900mV for total harmonic distortion, THD<5% is proposed using MOSFET bumping and capacitor attenuation techniques, combined for the first time. The minimum signal level the filter can distinguish from noise is still relatively small with the use of appropriate OTA architecture and using the gm/ID methodology for MOSFET sizing. So, programmable CMOS OTA-C band-pass filter topologies operating in sub-threshold region with a dynamic range of 65dB for use in bionic ears were proposed. The power consumption for the proposed filters is in nano- Watt range for their frequency range of (lOO-I Ok) Hz. Also, a 4-channel OTA-C filter bank is designed and tested. The EEG signals have small amplitudes and frequency bands ranges of uV'S and (l-40) Hz respectively. The important issue is to design filters with small noise floor with white dominant. This is achieved with the proposed OTA which is of relatively simple architecture and with operation in the deep weak-inversion region using ±1.5V supply rails. The OTA-C filter has power consumption in the pico-Watt range for 0, e, and a signals and less than 3nW for B signals. Another topology is suggested for future work.
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7

Hartleb, Carina. "Creation and Evaluation of Solid Optical Tissue Phantoms for Bio-Medical Optics Applications." Thesis, Linköping University, Department of Biomedical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3607.

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Because of their compatibility and precise results bio-optical methods based on measurements of the optical tissue properties gain importance in non-invasive medical therapy and diagnostic. For development and standardization of medical devices optical phantoms are suitable. The present report handles the creation and evaluation of solid tissue phantoms, made up of Agar, Vasolipid and ink utilizing different mixture ratios. After cutting the models in slices of 0.2 to 1.1 mm thickness the absorption- and scattering coefficient were measured using a collimated laser beam setup. As result of the study a formula for the preparation of solid optical tissue phantoms with desired optical properties was found, that is valid for models containing 1.12 % Agar.

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8

Ramosoeu, Makhabo Khabiso Ellen. "Characterisation and static behaviour of the DMLS Ti-6AI-4V for Bio-medical applications." Thesis, Bloemfontein: Central University of Technology, Free State, 2015. http://hdl.handle.net/11462/275.

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Thesis (M. Tech. (Engineering: Mechanical)) -- Central University of Technology, Free State,
The Centre for Rapid Prototyping and Manufacturing (CRPM) at the Central University of Technology, Free State (CUT) manufactures implants using Electro Optical Systems (EOS) titanium Ti-6Al-4V alloy powder (further referred to as EOS Ti64 powder) by means of Direct Metal Laser Sintering (DMLS) process on the EOSINT M 270 machine. For this reason, there is a need to characterise and acquire knowledge of the basic properties of direct metal laser sintered EOS titanium Ti-6Al-4V alloy samples (further referred to as DMLS Ti64 samples) under static tensile loading in order to provide the CRPM with engineering design data. The first objective of this Master’s study is to acquire the characteristics of EOS Ti64 powder in order to ascertain its suitability in the DMLS process. Secondly, the study aims to assess tensile properties and elastic constants of DMLS Ti64 samples produced from the set process parameters of EOSINT M 270 machine. Thirdly, it is to investigate microstructures of DMLS Ti64 samples subjected to different heat treatment techniques which will eventually assist in the determination of a suitable heat treatment technique that will yield higher ductility. Finally, the study aims to validate the static behaviour of DMLS Ti64 samples subjected to the static tensile loading up to a yield point in order to determine failure due to yielding. The samples were manufactured at CRPM Bloemfontein. The metallographic examinations, heat treatment and the determination of mechanical properties were done at the CSIR in Pretoria. Optical Microscope (OM) and Scanning Electron Microscope (SEM) were used to determine microstructures of DMLS Ti64 samples while Energy Dispersive X-Ray (EDX) analyses were performed using SEM. The samples were heat treated at temperatures of 700, 1000 and 1100°C respectively, and subsequently either cooled with the furnace, air or were water quenched. The mechanical property tests included tensile, hardness and determination of elastic constants. The static behaviour of DMLS Ti64 samples under static tensile load up to a yield point was predicted and verified using ABAQUSTM Finite Element Analysis (FEA). The stress-strain curves from ABAQUSTM were interpreted using MDSolid program. The point of interest was Von Mises yield stress at 0.2% offset, in order to determine failure due to yielding. EOS Ti64 powder particles were spherical in shape and the alpha and alpha+beta phases were identified. As-laser sintered samples possess a very fine and uniform alpha case with islands of martensitic plates; samples were brittle and showed low levels of ductility with an average elongation of 2.6% and an area reduction of 3.51%. Ultrasonic test results showed that DMLS Ti64 samples have Young’s modulus of 115 GPa, Shear modulus of 43 GP, a bulk modulus of 109 GPa and Poisson’s ratio of 0,323 while the density was 4.4 g/cm3. Slow cooling of DMLS Ti64 samples from 1000 and 1100oC resulted in a microstructure constituted more by the alpha phase of lower hardness than those from 700oC and as-laser sintered samples. High hardness was obtained by water quenching. The water quenched samples showed martensitic transformation and high hardness when compared to furnace cooled samples. Beta annealing tailored a microstructure of as-laser sintered samples into a lamellar structure with different lath sizes as per cooling rate. Beta annealing improved ductility levels up to 12.67% elongation for samples furnace cooled for 4 hours and even higher to 18.11% for samples furnace cooled for 34 hours, while area reduction increased to 25.94% and 33.39%, respectively. Beta annealing conversely reduced yield strength by 19.89% and ultimate tensile strength was reduced by 23.66%. The calculated maximum Von Mises stresses found were similar to the FEA interpreted results. The average percentage error, without the stress concentration factor, was approximately 8.29%; with the stress concentration factor included, it was 0.07%. The small reaction forces induced in both x-axis and z-axis contributed to this error of 0.07% between the calculations and ABAQUSTM FEA results. Samples that were not heat treated fell outside the Von Mises criterion and failed due to yielding. This justified the brittleness found in the tensile test results where elongation and area reduction were 2.6% and 3.51% respectively. However, all samples that were heat treated fell within the Von Mises criterion. The objectives of this study were achieved; the mechanical properties were similar to those of standard specification for wrought annealed Ti-6Al-4V alloy for surgical implant applications and EOS GmbH manufacturer’s material data sheet. DMLS Ti64 samples must be beta annealed in order to attain higher levels of ductility. A recommendation was made to further investigate the effect of heat treatment on the other mechanical properties. Furthermore, detailed results of basic properties of DMLS Ti64 samples are provided in the appendices in chart format and were written on a CD disc.
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9

John, Sween. "A Study of the Synthesis and Surface Modification of UV Emitting Zinc Oxide for Bio-Medical Applications." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc10990/.

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Анотація:
This thesis presents a novel ZnO-hydrogel based fluorescent colloidal semiconductor nanomaterial system for potential bio-medical applications such as bio-imaging, cancer detection and therapy. The preparation of ZnO nanoparticles and their surface modification to make a biocompatible material with enhanced optical properties is discussed. High quality ZnO nanoparticles with UV band edge emission are prepared using gas evaporation method. Semiconductor materials including ZnO are insoluble in water. Since biological applications require water soluble nanomaterials, ZnO nanoparticles are first dispersed in water by ball milling method, and their aqueous stability and fluorescence properties are enhanced by incorporating them in bio-compatible poly N-isopropylacrylamide (PNIPAM) based hydrogel polymer matrix. The optical properties of ZnO-hydrogel colloidal dispersion versus ZnO-Water dispersion were analyzed. The optical characterization using photoluminescence spectroscopy indicates approximately 10 times enhancement of fluorescence in ZnO-hydrogel colloidal system compared to ZnO-water system. Ultrafast time resolved measurement demonstrates dominant exciton recombination process in ZnO-hydrogel system compared to ZnO-water system, confirming the surface modification of ZnO nanoparticles by hydrogel polymer matrix. The surface modification of ZnO nanoparticles by hydrogel induce more scattering centers per unit area of cross-section, and hence increase the luminescence from the ZnO-gel samples due to multiple path excitations. Furthermore, surface modification of ZnO by hydrogel increases the radiative efficiency of this hybrid colloidal material system thereby contributing to enhanced emission.
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John, Sween Vaidyanathan Vijay Varadarajan. "A study of the synthesis and surface modification of UV emitting zinc oxide for bio-medical applications." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/permalink/meta-dc-10990.

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Книги з теми "Bio-medical Application"

1

Bidanda, Bopaya, and Paulo Bártolo, eds. Virtual Prototyping & Bio Manufacturing in Medical Applications. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-68831-2.

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Bidanda, Bopaya, and Paulo Jorge Bártolo, eds. Virtual Prototyping & Bio Manufacturing in Medical Applications. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-35880-8.

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3

Sāmī, Khūrī, Lhotská Lenka, Renda M. Elena, and SpringerLink (Online service), eds. Information Technology in Bio- and Medical Informatics: Third International Conference, ITBAM 2012, Vienna, Austria, September 4-5, 2012. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Lenka, Lhotská, Pisanti Nadia, and SpringerLink (Online service), eds. Information Technology in Bio- and Medical Informatics, ITBAM 2010: First International Conference, Bilbao, Spain, September 1-2, 2010. Proceedings. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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5

Feminist approaches to bioethics: Theoretical reflections and practical applications. Boulder, Colo: Westview Press, 1997.

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6

Sebastian, Bauer, ed. Introduction to bio-ontologies. Boca Raton: Taylor & Francis, 2011.

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7

Data mining in biomedical imaging, signaling, and systems. Boca Raton: CRC Press, 2011.

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8

Western Electronic Show and Convention (1998 Anaheim, Calif.). Wescon/98: Systems-on-a-chip - next generation IP networks, chip-level design, system design, embedded systems, aerospace applications, quality/reliability/test, EDA, system environment, system interface, wireless system design, network system design, bio-medical systems : conference proceedings : Anaheim Convention Center, Anaheim, California, September 15-17, 1998. [New York]: Institute of Electrical and Electronics Engineers, 1998.

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9

Nanomaterials in Bio-Medical Applications. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781945291739.

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10

Singh, Nirmal, ed. Radioisotopes - Applications in Bio-Medical Science. InTech, 2011. http://dx.doi.org/10.5772/1937.

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Частини книг з теми "Bio-medical Application"

1

Penders, Julien, Chris van Hoof, and Bert Gyselinckx. "Bio-Medical Application of WBAN: Trends and Examples." In Bio-Medical CMOS ICs, 279–302. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6597-4_8.

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2

Andò, Bruno, Salvatore Baglio, and Angela Beninato. "Magnetic Fluids for Bio-medical Application." In Lecture Notes in Electrical Engineering, 16–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-05167-8_2.

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3

Satapathy, Ranjan, Erik Cambria, and Amir Hussain. "Application to Sentiment Analysis." In Sentiment Analysis in the Bio-Medical Domain, 105–25. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68468-0_4.

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Allanic, Marianne, Alexandre Durupt, Marc Joliot, Benoît Eynard, and Philippe Boutinaud. "Application of PLM for Bio-Medical Imaging in Neuroscience." In Product Lifecycle Management for Society, 520–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41501-2_52.

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5

Park, Hyun Woo, Dingkun Li, Yongjun Piao, and Keun Ho Ryu. "A Hybrid Feature Selection Method to Classification and Its Application in Hypertension Diagnosis." In Information Technology in Bio- and Medical Informatics, 11–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64265-9_2.

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6

Weisner, B. "Clinical Aspects on Bio-Medical Potential of Exogenous Gangliqside Application." In Gangliosides and Modulation of Neuronal Functions, 563–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71932-5_55.

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7

Genius, Daniela, Ilias Bournias, Ludovic Apvrille, and Roselyne Chotin. "Model-Based Virtual Prototyping of CPS: Application to Bio-Medical Devices." In Communications in Computer and Information Science, 74–96. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67445-8_4.

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Dey, Lipika, Muhammad Abulaish, Rohit Goyel, and Jahiruddin. "Semantic Integration of Information Through Relation Mining - Application to Bio-medical Text Processing." In Lecture Notes in Computer Science, 365–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-77046-6_46.

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Ali, Syed Imran, Byeong Ho Kang, and Sungyoung Lee. "Application of Feature Subset Selection Methods on Classifiers Comprehensibility for Bio-Medical Datasets." In Ubiquitous Computing and Ambient Intelligence, 38–43. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48746-5_4.

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Bhattacharya, Manojit, Avijit Kar, Ramesh Chandra Malick, Chiranjib Chakraborty, Basanta Kumar Das, and Bidhan Chandra Patra. "Application of Internet Assistance Computation for Disease Prediction and Bio-modeling: Modern Trends in Medical Science." In Intelligent Systems Reference Library, 327–46. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33596-0_13.

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Тези доповідей конференцій з теми "Bio-medical Application"

1

Matsuda, Tetsuya, Akira Amano, and Shinobu Mizuta. "Bio-Medical Application of Information Systems." In Second International Conference on Informatics Research for Development of Knowledge Society Infrastructure (ICKS'07). IEEE, 2007. http://dx.doi.org/10.1109/icks.2007.5.

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2

Lo, Yuhwa, Frank Tsai, and Ash Arianpour. "Medical Imaging Systems Using Bio-Inspired Fluidic Lenses." In Bio-Optics: Design and Application. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/boda.2011.btua1.

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3

Beyer, G. J. "RADIOACTIVE ION BEAMS FOR BIO-MEDICAL RESEARCH AND NUCLEAR MEDICAL APPLICATION." In Proceedings of the 7th International Conference on ICATPP-7. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776464_0073.

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4

Biswas, Prosanto. "Silicon Nitride Thin Films for Bio Medical Application." In 62nd Society of Vacuum Coaters Annual Technical Conference. Society of Vacuum Coaters, 2019. http://dx.doi.org/10.14332/svc19.proc.0009.

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5

Raghav, Himadri Singh, B. P. Singh, and Sachin Maheshwari. "Design of low voltage OTA for bio-medical application." In 2013 Annual International Conference on Emerging Research Areas (AICERA) - 2013 International Conference on Microelectronics, Communications and Renewable Energy (ICMiCR). IEEE, 2013. http://dx.doi.org/10.1109/aicera-icmicr.2013.6576034.

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Kumar, Ramesh, Sharvan Kumar, Abdullah Bin Queyam, and A. Sengupta. "An Experimental Validation of Bio-Impedance Technique for Medical & Non-Medical Application." In 2018 8th International Conference on Cloud Computing, Data Science & Engineering (Confluence). IEEE, 2018. http://dx.doi.org/10.1109/confluence.2018.8442494.

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Ghafari, Mehran, Paul Brennan, and Mohammad Ghavami. "UWB power propagation for bio-medical implanted devices." In 2015 17th International Conference on E-health Networking, Application & Services (HealthCom). IEEE, 2015. http://dx.doi.org/10.1109/healthcom.2015.7454551.

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8

Mahalakshmi, N., A. Thenmo Zhli, and M. Balagi. "Design of dual-spiral antenna for implantable bio-medical application." In 2015 13th International Conference on Electromagnetic Interference and Compatibility (INCEMIC). IEEE, 2015. http://dx.doi.org/10.1109/incemic.2015.8055890.

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Byreddy, Dinesh Reddy, and MV Raghunadh. "An application of geometric active contour in bio-medical engineering." In 2014 International Conference on Circuits, Systems, Communication and Information Technology Applications (CSCITA). IEEE, 2014. http://dx.doi.org/10.1109/cscita.2014.6839280.

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10

Weinrich, Michael. "Special challenges and opportunities for application of bio-medical sensors." In SPIE Commercial + Scientific Sensing and Imaging, edited by Brian M. Cullum, Douglas Kiehl, and Eric S. McLamore. SPIE, 2016. http://dx.doi.org/10.1117/12.2221907.

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Звіти організацій з теми "Bio-medical Application"

1

Shestakova, Daria, Nataliya Sankova, and Ekaterina Parkhomchuk. Synthesis of magnetic polymer microspheres for bio-medical applications. Peeref, July 2023. http://dx.doi.org/10.54985/peeref.2307p8366482.

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