Entwicklung eines Multifunktionsinstruments für die laparoskopische Chirurgie

Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.Chirurgische Eingriffe werden zunehmend minimul-invasiv durchgeführt, um die Belastung der Patienten durch die Operation zu verringern. Die Innovation der hier vorgestellten technischen Lösung besteht darin,dass die einzelnen Instrumente, die für verschiedene Operationsschritte erforderlich sind, in einem gemeinsamen Handgriff zusammengefasst und damit im Operationsfeld simultan und rasch austauschbar vorgehalten werden können. Durch die Verwendung von verschiedenen Aktuatoren erfolgt der Wechsel zwischen den integrierten Insimmenten automatisiert, so dass eine Einhandbedienung gewährleistet ist

Evaluierung der Messmethoden zur Bewertung des therapeutischen Nutzens von Antidekubitus-Systemen

Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.Interface pressure measurement is today a most used technique for laboratory evaluation of support surfaces in prevention of pressure sores. This article describes the results of an experimental comparative evaluation of four modern pressure mapping Systems (Tekscan, Xsensor, Novel and FSA) using a special loading device.The tests generated dato on numerical accuracy, linearity and hysteresis. The results show that the accuracy of pressure mapping Systems is still limited and results obtained from different Systems can not be directly compared

A novel method for patient-oriented assignment of wheelchair cushions based on standardized laboratory testing procedures

Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.Rollstuhlsitzkissen sind die Schnittstelle zwischen Rollstuhl und Rollstuhlfahrer und übernehmen dabei Last übertragende und stabilisierende Aufgaben. Zusätzlich sollen sie helfen, Druckgeschwüre durch mechanische Entlastung und einen Abtransport von Feuchtigkeit und Wärme zu vermeiden. Die Auswahl eines Sitzkissen erfolgt dabei häufig anhand einer subjektiven Einschätzung der Sitzkisseneigenschaften, was die durchschnittliche Qualität der Versorgung negativ beeinflussen kann und unter Kostengesichtspunkten die Auswahl hochwirksamer Kissen nur schwer rechtfertigt. Dieser Artikel beschreibt ein Verfahren, Sitzkissen anhand von messtechnisch erfassten Kennwerten und einer standardisierten Patientenprofilerhebung auszuwählen. Dazu wird eine Übersicht über die am Markt erhältlichen Sitzkissen gegeben und Möglichkeiten erörtert, die Sitzkissen anhand von strukturierten Entscheidungshilfen nachvollziehbar auszuwählen und die Anforderungen des Patienten unterstützend einzuteilen und zuzuordnen.A wheelchair seat cushion represents the interface between the wheelchair and the wheelchair driver and has to manage the force transmission and the stabilization between both of them. An additional very important requirement is the prevention of pressure ulcers by pressure relief and the transfer of humidity and heat away from the patient. The allocation of a cushion to the patient happens normally on the base of a subjective description of the cushion without any transparent decision rules. Consequently the quality of this procedure could be improved by a better description of the cushion, based on standardized laboratory tests and by the development of decision tools helping to identify the main efforts of the user. This article describes a procedure that allows the allocation of wheelchair seat cushions based on the characteristic of cushions from standardized laboratory tests and on the brief description of the user. Additionally the existing principles for wheelchair cushions are listed, described and compared. The possibilities to develop structured decision tools for wheelchair cushions are discussed

Limitations of predicting substrate classes on a sedimentary complex but morphologically simple seabed

The ocean floor, its species and habitats are under pressure from various human activities. Marine spatial planning and nature conservation aim to address these threats but require sufficiently detailed and accurate maps of the distribution of seabed substrates and habitats. Benthic habitat mapping has markedly evolved as a discipline over the last decade, but important challenges remain. To test the adequacy of current data products and classification approaches, we carried out a comparative study based on a common dataset of multibeam echosounder bathymetry and backscatter data, supplemented with groundtruth observations. The task was to predict the spatial distribution of five substrate classes (coarse sediments, mixed sediments, mud, sand, and rock) in a highly heterogeneous area of the south-western continental shelf of the United Kingdom. Five different supervised classification methods were employed, and their accuracy estimated with a set of samples that were withheld. We found that all methods achieved overall accuracies of around 50%. Errors of commission and omission were acceptable for rocky substrates, but high for all sediment types. We predominantly attribute the low map accuracy regardless of mapping approach to inadequacies of the selected classification system, which is required to fit gradually changing substrate types into a rigid scheme, low discriminatory power of the available predictors, and high spatial complexity of the site relative to the positioning accuracy of the groundtruth equipment. Some of these issues might be alleviated by creating an ensemble map that aggregates the individual outputs into one map showing the modal substrate class and its associated confidence or by adopting a quantitative approach that models the spatial distribution of sediment fractions. We conclude that further incremental improvements to the collection, processing and analysis of remote sensing and sample data are required to improve map accuracy. To assess the progress in benthic habitat mapping we propose the creation of benchmark datasets

The Interaction of Relativization and Noun Incorporation in Southern Hokkaidō Ainu

This paper focuses on relativization in Southern Hokkaidō Ainu. Specifically, evidential expressions constitute the scope of this study since within this semantic domain a morphosyntactic layout reminiscent of internally-headed relative clauses (IHRCs) is found. Moreover, the structure of some evidential expressions suggests that what gives rise to an IHRC in those instances is classificatory noun incorporation (CNI). Following from past studies on Ainu, where IHRCs and CNI are never discussed, and with reference to cross-linguistic approaches to relativization and incorporation, this study addresses the interaction of these two processes in Southern Hokkaidō Ainu and suggests their reconsideration

Partnerorientierung zwischen Realität und Imagination: Anmerkungen zu einem zentralen Konzept der Dialogtheorie

This paper attempts a critique of the notion of 'dialogue' in dialogue theory as espoused by Linell, Markova, and others building on Bakhtin’s writings. According to them, human communication, culture, language, and even cognition are dialogical in nature. This implies that these domains work by principles of other-orientation and interaction. In our paper, we reject accepting other-orientation as an a priori condition of every semiotic action. Instead, we claim that in order to be an empirically useful concept for the social sciences, it must be shown if and how observable action is other-oriented. This leads us to the following questions: how can we methodically account for other-orientation of semiotic action? Does other-orientation always imply interaction? Is every human expression oriented towards others? How does the other, as s/he is represented in semiotic action, relate to the properties which the other can be seen to exhibit as indexed by their observable behavior? We study these questions by asking how the orientation towards others becomes evident in different forms of communication. For this concern, we introduce ‘recipient design’, ‘positioning’ and ‘intersubjectivity’ as concepts which allow us to inquire how semiotic action both takes the other into account and, reflexively, shapes him/her as an addressee having certain properties. We then specifically focus on actions and situations in which other-orientation is particularly problematic, such as interactions with children, animals, machines, or communication with unknown recipients via mass media. These borderline cases are scrutinized in order to delineate both limits and constitutive properties of other-orientation. We show that there are varieties of meaningful actions which do not exhibit an orientation towards the other, which do not rest on (the possibility of) interaction with the other or which even disregard what their producer can be taken to know about the other. Available knowledge about the other may be ignored in order to reach interactional goals, e. g. in strategical interactions or for concerns of socialization. If semiotic action is otherorientated, its design depends on how the other is available to and matters for their producer. Other-orientation may build on shared biographical experiences with the other, knowledge about the other as an individual and close attention to their situated conduct. However, other-orientation may also rest on (stereo-)typification with respect to institutional roles or group membership. In any case, others as they are represented in semiotic action can never be just others-as-such, but only othersas-perceived-by-the-actor. We conclude that the strong emphasis which dialogue theories put on otherorientation obscures that other-orientation is neither universal in semiotic action, that it must be distinguished from an interactive relationship, and that the ways in which the other figures in semiotic actions is not homogeneous in any of its most general properties. Instead, there is a huge variation in the ways in which the other can be taken into account. Therefore close scrutiny of how the other precisely figures in a certain kind of semiotic action is needed in order to lend the concept of ‘other-orientation’ empirical substance and a definite sense

Deliverable 1.1 review document on the management of marine areas with particular regard on concepts, objectives, frameworks and tools to implement, monitor, and evaluate spatially managed areas

The main objectives if this document were to review the existing information on spatial management of marine areas, identifying the relevant policy objectives, to identify parameters linked to the success or failure of the various Spatially Managed marine Areas (SMAs) regimes, to report on methods and tools used in monitoring and evaluation of the state of SMAs, and to identify gaps and weaknesses in the existing frameworks in relation to the implementation, monitoring, evaluation and management of SMAs. The document is naturally divided in two sections: Section 1 reviews the concepts, objectives, drivers, policy and management framework, and extraneous factors related to the design, implementation and evaluation of SMAs; Section 2 reviews the tools and methods to monitor and evaluate seabed habitats and marine populations.peer-reviewe

Theories in Business and Information Systems Engineering

Even though the idea of science enjoys an impressive reputation, there seems to be no precise conception of science. On the one hand, there is no unified definition of the extension of activities subsumed under the notion of science. According to the narrow conception that is common in Anglo-Saxon countries, science is restricted to those disciplines that investigate nature and aim at explanation and prediction of natural phenomena. A wider conception that can be found in various European countries includes social sciences, the humanities and engineering. On the other hand and related to the first aspect, there is still no general consensus on the specific characteristics of scientific discoveries and scientific knowledge

EUSO-SPB1 mission and science

The Extreme Universe Space Observatory on a Super Pressure Balloon 1 (EUSO-SPB1) was launched in 2017 April from Wanaka, New Zealand. The plan of this mission of opportunity on a NASA super pressure balloon test flight was to circle the southern hemisphere. The primary scientific goal was to make the first observations of ultra-high-energy cosmic-ray extensive air showers (EASs) by looking down on the atmosphere with an ultraviolet (UV) fluorescence telescope from suborbital altitude (33 km). After 12 days and 4 h aloft, the flight was terminated prematurely in the Pacific Ocean. Before the flight, the instrument was tested extensively in the West Desert of Utah, USA, with UV point sources and lasers. The test results indicated that the instrument had sensitivity to EASs of ⪆ 3 EeV. Simulations of the telescope system, telescope on time, and realized flight trajectory predicted an observation of about 1 event assuming clear sky conditions. The effects of high clouds were estimated to reduce this value by approximately a factor of 2. A manual search and a machine-learning-based search did not find any EAS signals in these data. Here we review the EUSO-SPB1 instrument and flight and the EAS search

Measurement of UV light emission of the nighttime Earth by Mini-EUSO for space-based UHECR observations

The JEM-EUSO (Joint Experiment Missions for Extreme Universe Space Observatory) program aims at the realization of the ultra-high energy cosmic ray (UHECR) observation using wide field of view fluorescence detectors in orbit. Ultra-violet (UV) light emission from the atmosphere such as airglow and anthropogenic light on the Earth\u27s surface are the main background for the space-based UHECR observations. The Mini-EUSO mission has been operated on the International Space Station (ISS) since 2019 which is the first space-based experiment for the program. The Mini-EUSO instrument consists of a 25 cm refractive optics and the photo-detector module with the 2304-pixel array of the multi-anode photomultiplier tubes. On the nadir-looking window of the ISS, the instrument is capable of continuously monitoring a ~300 km x 300 km area. In the present work, we report the preliminary result of the measurement of the UV light in the nighttime Earth using the Mini-EUSO data downlinked to the ground. We mapped UV light distribution both locally and globally below the ISS obit. Simulations were also made to characterize the instrument response to diffuse background light. We discuss the impact of such light on space-based UHECR observations and the Mini-EUSO science objectives