نتایج جستجو برای: negative fiber

تعداد نتایج: 661403  

2007
Shoukai Wang D. L. Chung

The negative and positive piezoresistivity in continuous carbon fiber epoxy-matrix composite has been clarified. The negative piezoresistivity associated with the increase of the through-thickness resistivity upon longitudinal tension and decrease in the throughthickness resistivity upon longitudinal compression is practically attractive for strain sensing and is attributed to the decrease in t...

2014
Nicole Nader Amy Weaver Susan Eckert Aida Lteif

BACKGROUND Nutritional therapy is an important component of diabetes management. There is data to suggest that fiber content of foods may affect glycemic response. MATERIALS AND METHODS 10 children, diagnosed with type 1 diabetes, participated. In the first phase of the study, children followed their usual meal plan. In the second phase, subjects followed the same meal plan except that fiber ...

Journal: :The Journal of experimental biology 2007
John E Lewis Benjamin Lindner Benoit Laliberté Sally Groothuis

The cancellation of self-generated components of sensory inputs is a key function of sensory feedback pathways. In many systems, cerebellar parallel fiber feedback mediates this cancellation through anti-Hebbian plasticity, resulting in the generation of a negative image of the reafferent inputs. Parallel fiber feedback involves direct excitation and disynaptic inhibition as well as synaptic pl...

Journal: :The American journal of clinical nutrition 2013
Pietro Ferrari Sabina Rinaldi Mazda Jenab Annekatrin Lukanova Anja Olsen Anne Tjønneland Kim Overvad Françoise Clavel-Chapelon Guy Fagherazzi Marina Touillaud Rudolf Kaaks Anne von Rüsten Heiner Boeing Antonia Trichopoulou Pagona Lagiou Vassiliki Benetou Sara Grioni Salvatore Panico Giovanna Masala Rosario Tumino Silvia Polidoro Marije F Bakker Carla H van Gils Martine M Ros H Bas Bueno-de-Mesquita Sanda Krum-Hansen Dagrun Engeset Guri Skeie Amiano Pilar Maria-José Sánchez Genevieve Buckland Eva Ardanaz Dolores Chirlaque Laudina Rodriguez Ruth Travis Tim Key Kay-Tee Khaw Nicholas J Wareham Malin Sund Per Lenner Nadia Slimani Teresa Norat Dagfinn Aune Elio Riboli Isabelle Romieu

BACKGROUND Limited scientific evidence has characterized the association between dietary fiber intake and risk of breast cancer (BC) by menopausal status and hormone receptor expression in tumors. OBJECTIVE We investigated the relation between total dietary fiber and its main food sources (vegetables, fruit, cereals, and legumes) and BC risk by using data from the European Prospective Investi...

Journal: :Optics express 2012
Fei Yu William J Wadsworth Jonathan C Knight

We describe a silica hollow-core fiber for mid-infrared transmission with a minimum attenuation of 34 dB/km at 3050 nm wavelength. The design is based on the use of a negative curvature core wall. Similar fiber designed for longer wavelengths has a transmission band extending beyond 4 µm.

In this paper, a new structure is provided for the dispersion compensating photonic crystal fibers in order to broaden the chromatic dispersion and increase the dispersion compensating capability in a wide wavelength range. In the structure, putting a combination of circular holes and a star structure in the inner core clad causes the dispersion coefficient profile to be broadened, and addition...

2013
Babita Hooda Vipul Rastogi

In this paper we present designs of fibers having non-zero positive, non-zero negative and near-zero ultra-flattened dispersion with small dispersion slope and ultra-large effective area over a wide spectral range. The designs consist of a concentric multilayer segmented core followed by a trench assisted cladding and a thin secondary core. The central segmented core helps in maintaining desire...

Journal: :international journal of occupational hygiene 0
somayeh farhang dehghan department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran farideh golbaaei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran bozorgmehr maddah department of chemistry, imam hossein university, tehran, iran rasoul yarahmadi department of occupational health, school of public health, iran university of medical sciences, tehran, iran asghar sedigh zadeh nuclear fusion research center, atomic energy organization, tehran, iran

original article   electrospun nanofibrous filter media have attracted considerable attention in the last decade. the present study aimed to develop the electrospun pan (polyacrylonitrile) filter media through experimental investigations for application in high-performance air filters. for this purpose, an experimental design was proposed to assess the effect of electrospinning process conditio...

2014
Jennifer S. W. Campbell Parya MomayyezSiahkal Peter Savadjiev Ilana R. Leppert Kaleem Siddiqi G. Bruce Pike

Diffusion magnetic resonance imaging fiber tractography is a powerful tool for investigating human white matter connectivity in vivo. However, it is prone to false positive and false negative results, making interpretation of the tractography result difficult. Optimal tractography must begin with an accurate description of the subvoxel white matter fiber structure, includes quantification of th...

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