İnsan vücudu ile elektromanyetik dalgaların etkileşimi, dokuların ve hücrelerin dielektrik özellikleri gibi faktörlerin yanı sıra diğer etkenler tarafından da şekillenir. Mikrodalga hipertermi ve mikrodalga görüntüleme uygulamalarında, deney ortamı ölçüm düzeneklerinde simülasyon sonuçlarını doğrulamak için doku taklit eden materyallere ihtiyaç vardır. Bu çalışmada hipertermi uygulamalarında kullanılmak üzere kadın memelerine ait bazı doku taklit materyallerinin karakterizasyonu sunulmuştur. Karakterize edilen doku taklit malzemelerinin maliyeti ucuz ve üretim aşamaları kolaydır. Deri, kas, meme yağı ve kanserli dokular ISM bandı 434 MHz'de önerilmektedir. The interaction of electromagnetic waves with the human body is determined by the dielectric properties of tissues and cells along with other considerations. The complex dielectric properties of the materials are very important for the interaction of the electromagnetic waves within the human body. In microwave hyperthermia and microwave imaging applications, there is a need of tissue mimicking materials to validate the simulation results in in vitro measurement setups. In this paper, we presented the characterization of some tissue materials belonging to female breast to be used for hyperthermia applications. The characterized tissue mimicking materials are inexpensive and have simple recipes that are easy to formulate. Skin, muscle, breast fat and cancerous tissues are proposed at ISM band 434 MHz.
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Introduction: Ecstasy (MDMA) is a popular recreational drug, but its illegal production and trade in the Netherlands have developed into a serious public order and ecological problem which endanger and question the harm reduction approach of the Dutch ecstasy policy.Methods: The market characteristics, adverse health effects, risk profile, and link to criminal activity of ecstasy were reviewed.Results: Ecstasy is often used in combination with other substances (i.e. polydrug use). Compared to several other illicit drugs and alcohol, ecstasy has a very low abuse and dependence liability and, as yet, there is little evidence of long-term harm. A potential health risk associated with ecstasy is acute hyperthermia, however this occurs at an unknown incidence rate and seems to be more prevalent when ecstasy is consumed in combination with heavy exercise at high ambient temperatures or when used in combination with other substances, including alcohol. Organized crime related to the production and trafficking of ecstasy in the Netherlands is a growing problem.Conclusions: This review provides a science-based summary that can be used to assist the public and political debate surrounding future Dutch ecstasy policy to reduce ecstasy-related organized crime while maintaining the principle of harm reduction.
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To prepare medical students appropriately for the management of toxicological emergencies, we have developed a simulation-based medical education (SBME) training in acute clinical toxicology. Our aim is to report on the feasibility, evaluation and lessons learned of this training. Since 2019, each year approximately 180 fifth-year medical students are invited to participate in the SBME training. The training consists of an interactive lecture and two SBME stations. For each station, a team of students had to perform the primary assessment and management of an intoxicated patient. After the training, the students completed a questionnaire about their experiences and confidence in clinical toxicology. Overall, the vast majority of students agreed that the training provided a fun, interactive and stimulating way to teach about clinical toxicology. Additionally, they felt more confident regarding their skills in this area. Our pilot study shows that SBME training was well-evaluated and feasible over a longer period.
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Study goal: This study was carried out to answer the following research question: which motivation do healthy volunteers have to participate in phase I clinical trials? - Methods: A literature search was done through Google Scholar and Academic Search Premier, followed by three interviews with volunteers who had recently concluded their participation in a (non-commercial) phase I trial. - Results: Our literature search revealed mainly commercial motives for volunteers to participate in phase I clinical trials. The interviews (with volunteers in a non-commercial trial) showed that other factors may also play a decisive role, such as: (1) wish to support the investigator (2) wish to contribute to science, (3) access to more/better health care (4) sociability: possibility to relax and to communicate with other participants (5) general curiosity. Precondition is that risks and burden are deemed acceptable. - Conclusions: financial remuneration appears to be the predominant motive to participate voluntarily in a clinical trial. Other reasons were also mentioned however, such as general curiosity, the drive to contribute to science and the willingness to help the investigator. In addition, social reasons were given such as possibility to relax and to meet other people. Potential subjects state that they adequately assess the (safety) risks of participating in a trial as part of their decision process.
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Thermal comfort -the state of mind, which expresses satisfaction with the thermal environment- is an important aspect of the building design process as modern man spends most of the day indoors. This paper reviews the developments in indoor thermal comfort research and practice since the second half of the 1990s, and groups these developments around two main themes; (i) thermal comfort models and standards, and (ii) advances in computerization. Within the first theme, the PMV-model (Predicted Mean Vote), created by Fanger in the late 1960s is discussed in the light of the emergence of models of adaptive thermal comfort. The adaptive models are based on adaptive opportunities of occupants and are related to options of personal control of the indoor climate and psychology and performance. Both models have been considered in the latest round of thermal comfort standard revisions. The second theme focuses on the ever increasing role played by computerization in thermal comfort research and practice, including sophisticated multi-segmental modeling and building performance simulation, transient thermal conditions and interactions, thermal manikins.
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Excerpt van de oratie van prof. dr. G. van der Laan als lector aan de Fontys hogescholen te Eindhoven (sociaal werk).
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1e en 2e alinea column: Het is vakantie. De 'Tomtom', ik bedoel hier dan navigatie systemen mee en niet letterlijk producten van het gelijknamige bedrijf, zal dus best veel gebruikt worden in de vele buitenlanden die Nederlanders per auto en fiets plegen te bezoeken. De TomTom is een eigenaardig ding. Aan de ene kant wijst ie de weg. En dat is gemakkelijk. Aan de andere kant wijst ie doorgaans iedereen dezelfde weg met als gevolg dat één weg heel druk is en de alternatieve routes naar het zelfde reisdoel heel leeg. De tomtom creëert daarmee een bias om met zijn allen dezelfde oplossingen langs de zelfde wegen te zoeken. TomTom live verandert daar niets aan.
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1e alinea column: Hoe ziet innovatie in de digital age eruit? Anders dan daarvoor? Is succes van innovatie in de digital age wel voorspelbaar? Bestaat er zoiets als een business logica voor innovatie? Voor echt nieuwe business is dat maar heel beperkt zo. Er zijn geen marktvoorbeelden waar je naar kunt kijken. Concurrenten of collega’s zijn je niet voorgegaan en hoe de klant zal reageren is ook al een verrassing.
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Boekbespeking van Sherrie Turkle, 2011, Alone Together: Why We Expect More from Technology and Less from Each Other. New York: Basic Books. Mails, sms’jes, instant messages, tweets, Skype, voicemails, Facebookberichten – via smartphones en andere apparaten zijn we vrijwel non-stop in contact met vrienden en anderen. Via chatboxen en games ontmoeten we nieuwe vrienden en voor wie graag nog meer contact wil zijn er de elektronische apparaten die graag met ons willen praten. In Amerikaanse verzorgingshuizen kletsen sociable robots lekker aan tegen demente bejaarden. Het Japanse hotel Ohnoya biedt tweepersoonskamers aan voor alleenstaande mannen en hun digitale vriendin, inclusief dubbel gedekte dinertafels. In Nederland (en elders) speelden kinderen reeds eind jaren negentig met robothuisdieren als Furby en Tamagotchi, en laat de nieuwste iPhone-knuffel Talking Carl na een aai over zijn buikje graag merken hoezeer hij is gesteld op zijn relatie met jou.
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In de themareeks ‘Uit de kunst’ onderzoeken we de waarde van participatie in een artistieke, creatieve wereld voor het HRD-vak. Dit artikel is het resultaat van een reflectieve mailwisseling tussen organisatiefilosoof Mieke Moor en lector Change Management Jacco van Uden. De aanleiding vormde een project waarin Jacco van rol wisselde met kunstenares Mercedes Azpilicueta.
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