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Qiulin Tan, Yanjie Guo, Lei Zhang, Fei Lu, Helei Dong, Jijun Xiong
This paper presents a new wireless sensor structure based on a substrate integrated circular waveguide (SICW) for the temperature test in harsh environments. The sensor substrate material is 99% alumina ceramic, and the SICW structure is composed of upper and lower metal plates and a series of metal cylindrical sidewall vias. A rectangular aperture antenna integrated on the surface of the SICW resonator is used for electromagnetic wave transmission between the sensor and the external antenna. The resonant frequency of the temperature sensor decreases when the temperature increases, because the relative permittivity of the alumina ceramic increases with temperature...
May 3, 2018: Sensors
Xixin Duan, Zhixian Bai, Xueting Shao, Jian Xu, Ning Yan, Junyou Shi, Xiaohong Wang
A novel colorimetric detection method based on the peroxidase-like activity of metal-substituted polyoxometalates (POMs) of SiW₉M₃ (M = Co2+ , Fe3+ , Cu2+ , Mn2+ ) has been established. POMs can catalyze oxidation of dopamine (DA) and ractopamine (RAC) by H₂O₂ in aqueous solutions. SiW₉Co₃-based POMs detect DA at concentrations as low as 5.38 × 10−6 mol·L−1 simply by observation of the color change from colorless to orange using the naked eye. RAC is detected by observing the change from colorless to slight red by SiW₉Cu₃ with a detection limit of 7...
April 26, 2018: Materials
Siw G Nielsen, Guro G Johansen, Harald Jørgensen
In higher music education (HME), the notion of "private teaching, private learning" has a long tradition, where the learning part rests on the student's individual practicing between instrumental lessons. However, recent research suggests that collaborative learning among peers is beneficial in several aspects, such as sense of belonging, motivation and self-efficacy. This is consistent with the concept of vicarious learning. In this study, we conducted a survey among bachelor music students in church music, performance or music education programs enrolled in a music academy ( N = 96), where parts of the questionnaire addressed peer learning and peer's influence on the students's instrumental practicing, and the degree of satisfaction with their practicing...
2018: Frontiers in Psychology
Ahmed Salim, Muhammad Usman Memon, Sungjoon Lim
Microwave resonators working as sensors can detect only a single analyte at a time. To address this issue, a TE20 -mode substrate-integrated waveguide (SIW) resonator is exploited, owing to its two distinct regions of high-intensity electric fields, which can be manipulated by loading two chemicals. Two microfluidic channels with unequal fluid-carrying capacities, engraved in a polydimethylsiloxane (PDMS) sheet, can perturb the symmetric electric fields even if loaded with the two extreme cases of dielectric [ethanol (E), deionized water (DI)] and [deionized water, ethanol]...
March 7, 2018: Sensors
Siw Carlfjord, Annica Öhrn, Anna Gunnarsson
BACKGROUND: Incident reporting (IR) in health care has been advocated as a means to improve patient safety. The purpose of IR is to identify safety hazards and develop interventions to mitigate these hazards in order to reduce harm in health care. Using qualitative methods is a way to reveal how IR is used and perceived in health care practice. The aim of the present study was to explore the experiences of IR from two different perspectives, including heads of departments and IR coordinators, to better understand how they value the practice and their thoughts regarding future application...
February 14, 2018: BMC Health Services Research
Moritz Lindquist Liljeqvist, Angela Silveira, Rebecka Hultgren, Siw Frebelius, Mariette Lengquist, Jan Engström, T Christian Gasser, Per Eriksson, Joy Roy
BACKGROUND:  The intraluminal thrombi (ILT) of abdominal aortic aneurysms (AAA) contain neutrophils, which can secrete elastase. We evaluated whether plasma neutrophil elastase-derived cross-linked fibrin degradation products (E-XDP) could reveal the presence, size and mechanical stress of AAAs and its ILTs. METHODS:  E-XDP and D-dimer were measured in plasma from 37 male patients with AAA and 42 male controls. The ILT volumes of the AAAs and any coexisting aneurysms could be measured in 29 patients and finite element analysis was performed to estimate mechanical stress of the ILT...
February 2018: Thrombosis and Haemostasis
Angela Pia Cazzolla, Nunzio Francesco Testa, Gianfranco Favia, Maria Grazia Lacaita, Domenico Ciavarella, Khrystyna Zhurakivska, Giuseppe Troiano, Lorenzo Lo Muzio
Langerhans cell histiocytosis (LCH) is a childhood pathology with a peak of incidence ranging from 1 to 4 years of age, though diagnosis is often made in adult age. LCH is clinically classified into three types: eosinophilic granuloma, Hand-Schuller-Christian disease and Abt-Letterer-Siwe disease. We report a case of Hand-Schüller-Christian disease with diabetes insipidus, skull and maxillary involvement in a 16-year-old boy referred to our observation for gradual increase in mobility of the teeth and subsequent gradual loss of the second premolars and the first molars of the upper jaw...
March 2018: Special Care in Dentistry
Hanna Tigerstrand Grevnerts, Anne Fältström, Sofi Sonesson, Håkan Gauffin, Siw Carlfjord, Joanna Kvist
PURPOSE: The purpose of the study was to (1) study and compare the factors that Swedish orthopaedic surgeons and physical therapists consider important for recommending ACL reconstruction and, (2) to assess how orthopaedic surgeons and physical therapists consider their own and each others, as well as patients', roles are in the treatment decision. METHODS: A web-based survey assessing the relevance of 21 predetermined factors, in the choice to recommend ACL reconstruction, was sent to orthopaedic surgeons and physical therapists...
February 6, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Jean Emmanuel Mbosso Teinkela, Xavier Siwe Noundou, Edwige Laure Nguemfo, Franck Meyer, Rene Wintjens, Michelle Isaacs, Albert Emmanuel Mpondo Mpondo, Heinrich C Hoppe, Rui Werner Maçedo Krause, Anatole Guy Blaise Azebaze
The cytotoxic, antiplasmodial, and antitrypanosomal activities of two medicinal plants traditionally used in Cameroon were evaluated. Wood of Ficus elastica Roxb. ex Hornem. aerial roots (Moraceae) and Selaginella vogelii Spring (Selaginellaceae) leaves were collected from two different sites in Cameroon. In vitro cell-growth inhibition activities were assessed on methanol extract of plant materials against Plasmodium falciparum strain 3D7 and Trypanosoma brucei brucei , as well as against HeLa human cervical carcinoma cells...
January 2018: Saudi Journal of Biological Sciences
Ing-Marie Claesson, Lotta Larsson, Linda Steen, Siw Alehagen
BACKGROUND: The benefits of breastfeeding for the infant as well for the mother are well-known. It is recognized that obese (Body Mass Index ≥30 kg/m2 ) women may have less antenatal intention to breastfeed, and shortened duration of breastfeeding compared with normal-weight women. This may result in adverse short- and long-term health for both mother and child, such as a shortened lactational amenorrhoea and decreased protection against breast cancer for the women, and an increased risk for infectious diseases and overweight/obesity among the children...
January 22, 2018: BMC Pregnancy and Childbirth
Yuhuan Chen, Régis Pouillot, Sofia M Santillana Farakos, Steven Duret, Judith Spungen, Tong-Jen Fu, Fazila Shakir, Patricia A Homola, Sherri Dennis, Jane M Van Doren
We developed a risk assessment of human salmonellosis associated with consumption of alfalfa sprouts in the United States to evaluate the public health impact of applying treatments to seeds (0-5-log10 reduction in Salmonella) and testing spent irrigation water (SIW) during production. The risk model considered variability and uncertainty in Salmonella contamination in seeds, Salmonella growth and spread during sprout production, sprout consumption, and Salmonella dose response. Based on an estimated prevalence of 2...
January 16, 2018: Risk Analysis: An Official Publication of the Society for Risk Analysis
Muhammad Usman Memon, Sungjoon Lim
In this study, a high-Q circular substrate-integrated waveguide (SIW) cavity resonator is proposed as a non-contact and non-invasive radio frequency (RF) sensor for chemical sensing applications. The design of the structure utilizes SIW technology along with a circular shape to achieve a high unloaded Q factor, which is one of the important requirements for RF sensors. The resonant frequency of the proposed circular SIW cavity sensor changes when a liquid material or a chemical (microliters) is inserted in the sensitive area of the structure...
January 6, 2018: Sensors
A P Amang, C Mezui, G T Siwe, J Emakoua, G Mbah, E Z Nkwengoua, G E Enow-Orock, P V Tan
Objective: This work investigated the healing and antisecretory effects of the aqueous extract of Eremomastax speciosa on "unhealed gastric ulcers" associated with gastric acid hypersecretion. Materials and Methods: "Unhealed gastric ulcers" were induced using indomethacin following the establishment of acetic-acid-induced chronic gastric ulcers. The extract (200 and 400 mg/kg, per os) was administered concomitantly with indomethacin (1 mg/kg, subcutaneously)...
2017: BioMed Research International
Han Li, Hongwei Gong, Yanfei Qi, Juan Li, Xufeng Ji, Jiaheng Sun, Rui Tian, Hao Bao, Xiangfu Song, Qiang Chen, Guoliang Liu
The antifungal activities of heteropolytungstates, α-1,2,3-K6 H[SiW9 V3 O40 ] (SiW-3), K13 [Ce(SiW11 O39 )2 ]·17H2 O (SiW-5), K13 [Eu(SiW11 O39 )2 ]·25H2 O (SiW-10), K6 PV3 W9 O40 (PW-6), α-K4 PVW11 O40 (PW-8), were screened in 29 Candida albicans, 8 Candida glabrata, 3 Candida krusei, 2 Candida parapsilosis, 1 Candida tropicalis, and 1 Cryptococcus neoformans strains using the CLSI M27-A3 method. SiW-5 had the highest efficacy with a minimum inhibitory concentration (MIC) values of <0.2-10.2 μM in vitro...
December 5, 2017: Scientific Reports
Frode Lysberg, PåL Gjerstad, Milada Cvancarova Småstuen, Siw Tone Innstrand, Magnhild Mjåvatn Høie, Geir Arild Espnes
AIM: The aim of the present study was to investigate the change in overall life satisfaction for different age groups and between genders over a 20-year period. METHODS: Data from 1984 to 2008 were extracted from a large prospective longitudinal health study of Nord-Trøndelag (HUNT), Norway. The study included more than 176,000 participants ranging from 20 to 70+ years of age. Data were analysed using logistic regression and adjusted for gender. RESULTS: The analyses revealed an increase in life satisfaction for all age groups from 1984-1986 (HUNT 1) to 1995-1997 (HUNT 2), with the highest levels being reached at 2006-2008 (HUNT 3)...
February 2018: Scandinavian Journal of Public Health
Hanna Grundström, Siw Alehagen, Carina Berterö, Preben Kjølhede
BACKGROUND: The study objective was to analyze and compare patient-reported experience measures (PREMs) and patient-reported outcome measures (PROMs) after hysterectomy in women with and without a preoperative complaint of pelvic pain associated with and without a confirmed diagnosis of endometriosis. METHODS: Retrospective nationwide register study. Data on 28,776 hysterectomies performed on benign indication between 2004 and 2016 were retrieved from the Swedish National Register for Gynecological Surgery...
November 17, 2017: Journal of Women's Health
Marco Knelangen, Elke Hausner, Maria-Inti Metzendorf, Sibylle Sturtz, Siw Waffenschmidt
OBJECTIVES: To analyze the availability of randomized controlled trials (RCTs) of new drugs in trial registries and to develop and test different search strategies in (, the EU Clinical Trials Register (EU-CTR), and the International Clinical Trials Registry Platform (ICTRP). STUDY DESIGN AND SETTING: Information from dossiers submitted by pharmaceutical companies was analyzed regarding the registration of the included RCTs in, EU-CTR and ICTRP; different search strategies were developed and tested to determine performance...
February 2018: Journal of Clinical Epidemiology
Sampa Maiti, Gorka Gallastegui, Gayatri Suresh, Saurabh Jyoti Sarma, Satinder Kaur Brar, Patrick Drogui, Yann LeBihan, Gerardo Buelna, Mausam Verma, Carlos Ricardo Soccol
Brewery industry liquid waste (BLW), brewery spent grain (BSG), apple pomace solid wastes (APS), apple pomace ultrafiltration sludge (APUS) and starch industry wastewater (SIW) have been considered as substrates to produce biobutanol. Efficiency of hydrolysis techniques tested to produce fermentable sugars depended on nature of agro-industrial wastes and process conditions. Acid-catalysed hydrolysis of BLW and BSG gave a total reducing sugar yield of 0.433 g/g and 0.468 g/g respectively. Reducing sugar yield from microwave assisted hydrothermal method was 0...
February 2018: Bioresource Technology
Gaetan Texier, Michael L Jackson, Leonel Siwe, Jean-Baptiste Meynard, Xavier Deparis, Herve Chaudet
Benchmarking surveillance systems requires realistic simulations of disease outbreaks. However, obtaining these data in sufficient quantity, with a realistic shape and covering a sufficient range of agents, size and duration, is known to be very difficult. The dataset of outbreak signals generated should reflect the likely distribution of authentic situations faced by the surveillance system, including very unlikely outbreak signals. We propose and evaluate a new approach based on the use of historical outbreak data to simulate tailored outbreak signals...
2017: PloS One
Jenny Lund, Daniel S Tangen, Håvard Wiig, Hans K Stadheim, Siw A Helle, Jesper B Birk, Thorsten Ingemann-Hansen, Arild C Rustan, G Hege Thoresen, Jørgen F P Wojtaszewski, Eili T Kase, Jørgen Jensen
We hypothesised that skeletal muscles of healthy young people have a large variation in oxidative capacity and fibre-type composition, and aimed therefore to investigate glucose metabolism in biopsies and myotubes isolated from musculus vastus lateralis from healthy males with varying degrees of maximal oxygen uptake. Trained and intermediary trained subjects showed higher carbohydrate oxidation in vivo. Fibre-type distribution in biopsies and myotubes did not differ between groups. There was no correlation between fibre-type I expression in biopsies and myotubes...
September 1, 2017: Archives of Physiology and Biochemistry
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