220 research outputs found

    Broadband compact microstrip patch antenna design loaded by multiple split ring resonator superstrate and substrate

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    We present microstrip patch antenna loaded with multiple split ring resonator substrate and superstrate. We analyze how the loading of split ring resonator superstrate and substrate can improve the bandwidth compared to the simple microstrip patch antenna and microstrip patch antenna loaded with split ring resonator superstrate. Another important observation is made for multiple split ring resonator loading in superstrate and substrate of microstrip patch antenna. The design is compared for two, three, and four-ring split ring resonator loading. The designs are also compared for different gap spacing between the rings. All three designs are compared for small gap and large gap between the rings. The design results in the form of reflection coefficient and bandwidth is presented in this manuscript. The design results are also compared with previously published designs

    Broadband compact microstrip patch antenna design loaded by multiple split ring resonator superstrate and substrate

    Get PDF
    We present microstrip patch antenna loaded with multiple split ring resonator substrate and superstrate. We analyze how the loading of split ring resonator superstrate and substrate can improve the bandwidth compared to the simple microstrip patch antenna and microstrip patch antenna loaded with split ring resonator superstrate. Another important observation is made for multiple split ring resonator loading in superstrate and substrate of microstrip patch antenna. The design is compared for two, three, and four-ring split ring resonator loading. The designs are also compared for different gap spacing between the rings. All three designs are compared for small gap and large gap between the rings. The design results in the form of reflection coefficient and bandwidth is presented in this manuscript. The design results are also compared with previously published designs

    The Elderly Poor in the EU’s New Member States. ENEPRI Research Reports No. 60, November 2008

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    To what extent is the financial position of the elderly in the NMS more vulnerable than that of the old member states (or the EU-15), due to a rather unfavourable starting point and the possible impact of pension reforms? This is the main issue of the current research report. It tries to delineate the vulnerability of the income position of elderly people in the NMS, in relation to the demographic, socio-economic and institutional context of these countries. More specifically, the report focuses on: - the current level of income of the elderly in the NMS, and the degree of relative poverty; - the way this position is related to the educational and labour market status of the elderly in the NMS, their retirement behaviour, institutional arrangements (notably the pension system), and demographic developments; - specific problems regarding the income position of possibly ‘marginal’ elderly groups in the NMS (such as single elderly female pensioners)

    Effect of mebendazole on fibrosarcoma in hamsters

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    Purpose: To investigate the effect of mebendazole on an in vivo solid tumor model of fibrosarcoma in hamsters.Methods: 24 Syrian golden hamsters of both sexes with the approximate body  weight of 100g were randomly distributed in 2 experimental and 2 control groups, with 6 animals in each group. BHK-21/C13 cells (2 x 106) in 1 mL Glasgow Minimum Essential Medium (GMEM) were injected subcutaneously into the back of each animal in 3 groups. The experimental groups were treated with mebendazole  (460 mg/kg) via a gastric tube on a daily basis, immediately after tumor inoculation. In addition, one experimental group received deoxycholic acid 20 mg/kg once a day. After 2 weeks, when the tumors were approximately 1 - 2 cm in the control group, all the animals were sacrificed, and their blood collected for laboratory analysis. The tumors were excised, their weight and diameters measured, and the volumes  calculated. The tumor samples were histopathologically assessed and the main organs toxicologically analyzed. Images were taken and processed by an imaging software, and Ki-67-positive cells in the tumor samples were quantified.Results: Mebendazole diminished tumor mitosis from 18.5 ± 3.02 to 13.5 ± 3.45 (p < 0.05), vasculature and tissue penetration, and increased necroses in tumor  slices. Tumor volume and weight were insignificantly attenuated. Toxicity was not observed.Conclusion: Mebendazole might be an effective non-toxic agent in sarcoma therapy.Keywords: Mebendazole, Hamsters, BHK-21/C13 cells, Fibrosarcoma therapy,  Tumor mitosi

    Application of a widely-used tropical anti-worm agent, mebendazole, in modern oncology

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    Although clinical trials have not been completed, it has already been confirmed that mebendazole, a well-known anti-parasitic drug widely used in the tropical areas, inhibits cancer cell growth. Preclinical studies show that mebendazole notably impedes the growth of malignant and metastatic tumors such as osteosarcoma and soft tissue sarcoma, melanoma, carcinoma (lung, colorectal, breast, ovarian, hepatocellular and adrenocortical), acute myeloid leukaemia, glioblastoma multiforme and  meduloblastoma. Mebendazole can induce the depolymerization of microtubules in neoplasms and newly formed vasculature, stopping tumor growth and neoangiogenesis, along with other proposed mechanisms of action.Keywords: Anthelmintic, Mebendazole, Cancer treatment, Antimicrotubullar effect, Antineoangiogenesi

    Mapping between dynamic markings and performed loudness: a machine learning approach

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    This work was supported in part by UK EPSRC Platform Grant for Digital Music (EP/K009559/1), the Spanish TIN project TIMUL (TIN2013-48152- C2-2-R), and the European Unions Horizon 2020 research and innovation programme under grant agreement No 688269

    How to determine local elastic properties of lipid bilayer membranes from atomic-force-microscope measurements: A theoretical analysis

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    Measurements with an atomic force microscope (AFM) offer a direct way to probe elastic properties of lipid bilayer membranes locally: provided the underlying stress-strain relation is known, material parameters such as surface tension or bending rigidity may be deduced. In a recent experiment a pore-spanning membrane was poked with an AFM tip, yielding a linear behavior of the force-indentation curves. A theoretical model for this case is presented here which describes these curves in the framework of Helfrich theory. The linear behavior of the measurements is reproduced if one neglects the influence of adhesion between tip and membrane. Including it via an adhesion balance changes the situation significantly: force-distance curves cease to be linear, hysteresis and nonzero detachment forces can show up. The characteristics of this rich scenario are discussed in detail in this article.Comment: 14 pages, 9 figures, REVTeX4 style. New version corresponds to the one accepted by PRE. The result section is restructured: a comparison to experimental findings is included; the discussion on the influence of adhesion between AFM tip and membrane is extende

    Education for Sustainable Development: Towards the Sustainable University

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    We  planned  this  conference  in  anticipation  of  the  end  of  the  UN  Decade  of  Education  for  Sustainable   Development  (DESD),  and  the  start  of  the  next  phase  for  those  involved  in  ESD  here  and   internationally.    At  Plymouth  University,  2015  marks  ten  year  anniversary  since  cross-­‐institutional   work  on  sustainability  and  sustainability  education  was  spearheaded  by  the  founding  of  the  Centre  for   Sustainable  Futures  (CSF).    Coincidentally,  2015  also  marks  a  ten  years  since  the  influential  HEFCE   policy  document  ‘Sustainable  Development  in  Higher  Education’  was  released.   Holding  the  conference  in  January  –  named  after  the  Roman  god  of  doorways,  of  endings  and   beginnings  –  we  sought  to  look  at  some  of  what  has  been  achieved  in  sustainability  education  to  date   and  explore  its  prospects  as  we  move  forward.   Following  an  enthusiastic  response  to  the  call  for  abstracts,  the  conference  featured  a  diverse  range   of  research  papers,  posters,  and  roundtable  presentations  from  academics  and  practitioners  across   the  UK  and  beyond.  The  conference  was  arranged  around  three  overarching  themes:     ESD  Pedagogy:  Criticality,  Creativity,  and  Collaboration   What  are  the  teaching  and  learning  processes  that  enable  students  to  develop  their  own  capacity  to   think  critically  and  creatively  in  the  face  of  global  sustainability  challenges  and,  secondly,  to  act   collaboratively  in  ways  that  pursue  more  hopeful  and  sustainable  futures?   Innovative  Learning  Spaces  for  ESD   What  are  the  physical  environments  that  provide  opportunities  for  new  forms  of  sustainability   education  to  flourish?  What  lies  beyond  the  lecture  hall  that  is  conducive  to  student  learning  through   inquiry-­‐based,  active,  participatory,  interdisciplinary  and  experiential  methods?   Towards  the  Sustainable  University   What  are  effective  approaches  for  leading  institutional  change,  organisational  learning,  and  staff  CPD   towards  sustainability?  This  publication  focuses  on  the  last  theme  –  Towards  the  Sustainable  University.    The  previous   PedRIO  Occasional  Paper  8  looks  at  the  first  theme  ESD  Pedagogy:  Criticality,  Creativity,  and   Collaboration
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