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  1. AU="Kieffer, M"
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  1. Book ; Thesis: Untersuchungen zur Unterscheidbarkeit von Weizen aus ökologischem und konventionellem Anbau

    Kieffer, Martina

    1995  

    Author's details vorgelegt von Martina Kieffer
    Size VII, 217 S. : graph. Darst.
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Bonn, Univ., Diss., 1995
    Note Zsfassung in engl. Sprache
    Remark Abt. Nussallee/Bereichsbibl. ZBMed: AY 17700
    HBZ-ID HT007090418
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    968/980 available for loan (reading room) Freihandmagazin (U1)

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  2. Article: Touristification. Empty concept or element of analysis in tourism geography?

    Ojeda, Antonio B / Kieffer, Maxime

    Geoforum; journal of physical, human, and regional geosciences

    2020  Volume 115, Page(s) 143–145

    Abstract: Since the end of the last century, geographers have been using the concept of touristification understood as a complex process in which various stakeholders interfere, transforming a territory through tourist activity. However, over recent years, this ... ...

    Abstract Since the end of the last century, geographers have been using the concept of touristification understood as a complex process in which various stakeholders interfere, transforming a territory through tourist activity. However, over recent years, this word has become popular in other areas with a distinct connotation, understanding touristification as a negative idea of tourism, like the massification of a destination or as a synonymous for gentrification or tourism-phobia. This situation discourages the use of the term and causes the necessity to question the usefulness of the concept, considered as too ambiguous or even empty. We argue for a correct use of the term touristification, focused on the territorial phenomenon and process it is meant to describe in a geographical approach without ideological preconceived notion, to construct knowledge from a territorial understanding of tourism in an ever-globalized world.
    Keywords covid19
    Language English
    Publishing date 2020-07-04
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1500472-7
    ISSN 0016-7185
    ISSN 0016-7185
    DOI 10.1016/j.geoforum.2020.06.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Datennutzung in der Automobilindustrie

    Kieffer, Michael

    Der Betrieb Vol. 70, No. 45 , p. 2657-2662

    Zuordnung und rechtlicher Schutz von Fahrzeugdaten

    2017  Volume 70, Issue 45, Page(s) 2657–2662

    Author's details RA Dr. Michael Kieffer
    Language German
    Publisher Handelsblatt Fachmedien
    Publishing place Düsseldorf
    Document type Article
    ZDB-ID 879-5
    ISSN 0005-9935
    Database ECONomics Information System

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  4. Book ; Online: MICN

    Malik, H. / Adjih, C. / Weidmann, C. / Kieffer, M.

    a network coding protocol for ICN with multiple distinct interests per generation

    2020  

    Abstract: In Information-Centric Networking (ICN), consumers send interest packets to the network and receive data packets as a response to their request without taking care of the producers, which have provided the content, contrary to conventional IP networks. ... ...

    Abstract In Information-Centric Networking (ICN), consumers send interest packets to the network and receive data packets as a response to their request without taking care of the producers, which have provided the content, contrary to conventional IP networks. ICN supports the use of multiple paths; however, with multiple consumers and producers, coordination among the nodes is required to efficiently use the network resources. Network coding (NC) is a promising tool to address this issue. The challenge in the case of NC is to be able to get independent coded content in response to multiple parallel interests by one or several consumers. In this work, we propose a novel construction called MILIC (Multiple Interests for Linearly Independent Contents) that impose constraints on how the replies to interests are coded, intending to get linearly independent contents in response to multiple interests. Several protocol variants, called MICN (MILIC-ICN), built on top of NDN (Named Data Networking), are proposed to integrate these interest constraints and NC of data packets. Numerical analysis and simulations illustrate that the MILIC construction performs well and that the MICN protocols are close to optimal throughput on some scenarios. MICN protocols compare favorably to existing protocols and show significant benefits when considering the total number of transmitted packets in the network, and in the case of high link loss rate.
    Keywords Computer Science - Networking and Internet Architecture
    Subject code 303
    Publishing date 2020-07-02
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  5. Book ; Thesis: Serum antibodies tp gliadin and other cereal proteins in patients with coeliac disease and dermatitis herpetiformis

    Kieffer, Marianne

    1985  

    Size 20 S: graph. Darst.
    Publishing country Denmark
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Koebenhavn, Univ., Diss., 1985
    HBZ-ID HT002933419
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    87 E 1448 order for loan Magazin

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  6. Book ; Online: Admission Control and Resource Reservation for Prioritized Slice Requests with Guaranteed SLA under Uncertainties

    Luu, Quang-Trung / Kerboeuf, Sylvaine / Kieffer, Michel

    2022  

    Abstract: Network slicing has emerged as a key concept in 5G systems, allowing Mobile Network Operators (MNOs) to build isolated logical networks (slices) on top of shared infrastructure networks managed by Infrastructure Providers (InP). Network slicing requires ... ...

    Abstract Network slicing has emerged as a key concept in 5G systems, allowing Mobile Network Operators (MNOs) to build isolated logical networks (slices) on top of shared infrastructure networks managed by Infrastructure Providers (InP). Network slicing requires the assignment of infrastructure network resources to virtual network components at slice activation time and the adjustment of resources for slices under operation. Performing these operations just-in-time, on a best-effort basis, comes with no guarantee on the availability of enough infrastructure resources to meet slice requirements. This paper proposes a prioritized admission control mechanism for concurrent slices based on an infrastructure resource reservation approach. The reservation accounts for the dynamic nature of slice requests while being robust to uncertainties in slice resource demands. Adopting the perspective of an InP, reservation schemes are proposed that maximize the number of slices for which infrastructure resources can be granted while minimizing the costs charged to the MNOs. This requires the solution of a max-min optimization problem with a non-linear cost function and non-linear constraints induced by the robustness to uncertainties of demands and the limitation of the impact of reservation on background services. The cost and the constraints are linearized and several reduced-complexity strategies are proposed to solve the slice admission control and resource reservation problem. Simulations show that the proportion of admitted slices of different priority levels can be adjusted by a differentiated selection of the delay between the reception and the processing instants of a slice resource request.

    Comment: Accepted to be published in IEEE Transactions on Network and Service Management
    Keywords Computer Science - Networking and Internet Architecture
    Subject code 000
    Publishing date 2022-03-17
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

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  7. Article: Touristification. Empty concept or element of analysis in tourism geography?

    Ojeda, Antonio B. / Kieffer, Maxime

    Geoforum

    Abstract: Since the end of the last century, geographers have been using the concept of touristification understood as a complex process in which various stakeholders interfere, transforming a territory through tourist activity However, over recent years, this ... ...

    Abstract Since the end of the last century, geographers have been using the concept of touristification understood as a complex process in which various stakeholders interfere, transforming a territory through tourist activity However, over recent years, this word has become popular in other areas with a distinct connotation, understanding touristification as a negative idea of tourism, like the massification of a destination or as a synonymous for gentrification or tourism-phobia This situation discourages the use of the term and causes the necessity to question the usefulness of the concept, considered as too ambiguous or even empty We argue for a correct use of the term touristification, focused on the territorial phenomenon and process it is meant to describe in a geographical approach without ideological preconceived notion, to construct knowledge from a territorial understanding of tourism in an ever-globalized world
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #628599
    Database COVID19

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  8. Article ; Online: Project ACCLAIM: Intervention Effect on Community Knowledge, Attitudes and Beliefs of Maternal and Child Health and HIV/AIDS in Eswatini, Uganda and Zimbabwe.

    Bandopadhay, N / Woelk, G B / Kieffer, M P / Mpofu, D

    AIDS and behavior

    2021  Volume 25, Issue 8, Page(s) 2400–2409

    Abstract: The ACCLAIM Study aimed to assess the effect of a package of community interventions on the demand for, uptake of, and retention of HIV-positive pregnant/postpartum women in maternal and child health (MCH) and prevention of mother-to-child HIV ... ...

    Abstract The ACCLAIM Study aimed to assess the effect of a package of community interventions on the demand for, uptake of, and retention of HIV-positive pregnant/postpartum women in maternal and child health (MCH) and prevention of mother-to-child HIV transmission (PMTCT) services. The study occurred from 2013 to 2015 in Eswatini, Uganda, and Zimbabwe. The three interventions were: (1) a social learning and action component for community leaders, (2) community days, and (3) peer discussion groups. Household cross-sectional surveys on community members' MCH and PMTCT knowledge, attitudes, and beliefs were analyzed pre- and post-intervention, using MCH, HIV stigma, and gender-equitable men (GEM) indicators. We used t-tests to measure the significance of mean pre- vs. post-intervention score changes stratified by gender within each intervention arm and generalized linear models to compare mean score changes of the cumulative intervention arms with the community leaders-only intervention. Response rates were over 85% for both surveys for men and women, with a total of 3337 pre-intervention and 3162 post-intervention responses. The combined package of three interventions demonstrated a significantly greater increase in MCH scores for both women (diff = 1.34, p ≤ 0.001) and men (diff = 2.03, p < 0.001). The arms that included interventions for both community leader engagement and community days (arms 2 and 3)led to a greater increase in mean GEM scores compared to the community leader engagement intervention alone (arm 1), for both women (diff = 1.32, p = 0.002) and men (diff = 1.37, p = 0.004). Our findings suggest that a package of community interventions may be most effective in increasing community MCH/HIV knowledge and improving gender-equitable norms.
    MeSH term(s) Child ; Child Health ; Cross-Sectional Studies ; Eswatini ; Female ; HIV Infections/prevention & control ; Health Knowledge, Attitudes, Practice ; Humans ; Infectious Disease Transmission, Vertical/prevention & control ; Male ; Pregnancy ; Uganda/epidemiology ; Zimbabwe
    Language English
    Publishing date 2021-03-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1339885-4
    ISSN 1573-3254 ; 1090-7165
    ISSN (online) 1573-3254
    ISSN 1090-7165
    DOI 10.1007/s10461-021-03202-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 6451: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  9. Book ; Online: Energy-efficient transmission policies for the linear quadratic control of scalar systems

    Sun, Yifei / Lasaulce, Samson / Kieffer, Michel / Postoyan, Romain / Nešić, Dragan

    2022  

    Abstract: This paper considers controlled scalar systems relying on a lossy wireless feedback channel. In contrast with the existing literature, the focus is not on the system controller but on the wireless transmit power controller that is implemented at the ... ...

    Abstract This paper considers controlled scalar systems relying on a lossy wireless feedback channel. In contrast with the existing literature, the focus is not on the system controller but on the wireless transmit power controller that is implemented at the system side for reporting the state to the controller. Such a problem may be of interest, \emph{e.g.}, for the remote control of drones, where communication costs may have to be considered. Determining the power control policy that minimizes the combination of the dynamical system cost and the wireless transmission energy is shown to be a non-trivial optimization problem. It turns out that the recursive structure of the problem can be exploited to determine the optimal power control policy. As illustrated in the numerical performance analysis, in the scenario of a dynamics without perturbations, the optimal power control policy consists in decreasing the transmit power at the right pace. This allows a significant performance gain compared to conventional policies such as the full transmit power policy or the open-loop policy.
    Keywords Electrical Engineering and Systems Science - Systems and Control
    Subject code 003
    Publishing date 2022-05-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  10. Article: Empfehlungs-E-Mails als unzumutbare Belästigung

    Kieffer, Michael / Koehler, Philipp

    Der Betrieb : mit Recht Innovation sichern Vol. 69, No. 39 , p. 2284-2285

    Facebook-Funktion "Freunde finden"

    2016  Volume 69, Issue 39, Page(s) 2284–2285

    Author's details Dr. Michael Kieffer/Philipp Koehler, beide Rechtsanwälte (Taylor Wessing, München)
    Language German
    Publisher Handelsblatt Fachmedien
    Publishing place Düsseldorf
    Document type Article
    ZDB-ID 879-5
    ISSN 0005-9935
    Database ECONomics Information System

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