2,333 research outputs found
Simultaneous sensing of the strain and points of failure in composite beams with an embedded fiber optic Michelson sensor
No full textA fiber optic Michelson sensor was embedded in composite beams to sense the internal strain and points of failure of the composite structures. The bending deformation and matrix cracking were investigated by four-point bending tests of cross-ply composite beams with the embedded fiber optic sensor. The failure points of composite beams were detected by using both a PZT sensor and a fiber optic sensor in order to investigate the fiber optic failure signals. The failure due to matrix cracks in a composite beam was confirmed by the edge replica method. The digital processing of the fiber optic signal was carried out to determine the strains and failure points of composite beams. The failure points were observed from the processed failure signal by high-pass filtering. The initial failure strain of the composite beam was measured and processed from the fiber optic strain signal after low-pass filtering
A digital signal processing algorithm for structural strain measurement by a 3 x 3 passive demodulated fiber optic interferometric sensor
No full textA digital signal processing algorithm, the moving reference line crossing count method (MRLCCM), was developed to implement the structural strain measurement by a passive demodulated fiber optic Michelson interferometric sensor. The fiber optic Michelson sensor, which is constructed of a 3 x 3 fiber optic coupler, can give information about the magnitude and direction of the strain of structures. The beating, drifting and noise, which are caused by the longitudinal strain and the lateral strain of the fiber, bring about the counting error of the phase differences which are directly converted to the structural strain. The developed algorithm is based on the reference line crossing count method and resets the reference line during the presence of the signal drifting. The accuracy of the strain calculation was confirmed by the various simulated fiber optic signals with signal beating, drifting and noise. A passive demodulated 3 x 3 fiber optic Michelson interferometric sensor was bonded on the cantilevered aluminum beam for experimental strain sensing. The capability of real-time processing was verified by the real fiber optic signals
A study on the development of transmission-type extrinsic Fabry-Perot interferometric optical fiber sensor
No full textThe conventional reflection-type extrinsic Fabry-Perot interferometric (EFPI) optical fiber sensor has good sensitivity and resolution compared with other types of optical fiber sensors, However, they have the disadvantage that the distinction of strain direction of EFPI is difficult because of measurement method by only fringe counting. This paper presents the newly developed transmission-type EFPI (TEFPI) optical fiber sensor, which has been improved by additional functions, and whose measuring system differs from that of the reflection-type EFPI optical fiber sensors using a single-mode fiber (SMF) and multimode (MMF) fibers as light guides and reflectors, respectively. The output signal of the TEFPI optical fiber sensor was analyzed with the uniform plane wave-based model, the SMF power distribution-based model and the splice loss-based model; the analyzed signals were then verified experimentally. Based on the results of analysis, the TEFPI optical fiber sensor was fabricated using two single-mode fibers connected to the light source and optical receiver; this was then used in strain measurement. The strain measured by the TEFPI optical fiber sensor was compared with that measured by the electric strain gauge
Methylotetracoccus oryzae Strain C50C1 Is a Novel Type Ib Gammaproteobacterial Methanotroph Adapted to Freshwater Environments
No full textMethane-oxidizing microorganisms perform an important role in reducing emissions of the greenhouse gas methane to the atmosphere. To date, known bacterial methanotrophs belong to the Proteobacteria, Verrucomicrobia, and NC10 phyla. Within the Proteobacteria phylum, they can be divided into type Ia, type Ib, and type II methanotrophs. Type Ia and type II are well represented by isolates. Contrastingly, the vast majority of type Ib methanotrophs have not been able to be cultivated so far. Here, we compared the distributions of type Ib lineages in different environments. Whereas the cultivated type Ib methanotrophs (Methylococcus and Methylocaldum) are found in landfill and upland soils, lineages that are not represented by isolates are mostly dominant in freshwater environments, such as paddy fields and lake sediments. Thus, we observed a clear niche differentiation within type Ib methanotrophs. Our subsequent isolation attempts resulted in obtaining a pure culture of a novel type Ib methanotroph, tentatively named “Methylotetracoccus oryzae” C50C1. Strain C50C1 was further characterized to be an obligate methanotroph, containing C_(16:1)ω9c as the major membrane phospholipid fatty acid, which has not been found in other methanotrophs. Genome analysis of strain C50C1 showed the presence of two pmoCAB operon copies and XoxF5-type methanol dehydrogenase in addition to MxaFI. The genome also contained genes involved in nitrogen and sulfur cycling, but it remains to be demonstrated if and how these help this type Ib methanotroph to adapt to fluctuating environmental conditions in freshwater ecosystems
Early Ibāḍī Theology
No full textEarly Ibāḍī Theology presents the critical edition of six Arabic theological texts recently discovered in two manuscripts in Mzāb in Algeria dating from the middle of the 8th century. The texts were sent by their author, the prominent Kūfan Ibāḍī kalām theologian ?Abd Allāh b. Yazīd al-Fazārī to North Africa where he had a large following in the Ibāḍī community later known as the Nukkār. They constitute the earliest extant body of Muslim kalām theology and are vital for the study of the initial development of rational theology in Islam. The sophisticated treatment of the divine attributes in these texts indicates that this subject developed considerably earlier in Islamic theology than previously accepted in modern scholarship
A novel method to allow noninvasive, longitudinal imaging of the murine immune system in vivo
No full textIn vivo imaging has revolutionized understanding of the spatiotemporal complexity that subserves the generation of successful effector and regulatory immune responses. Until now, invasive surgery has been required for microscopic access to lymph nodes (LNs), making repeated imaging of the same animal impractical and potentially affecting lymphocyte behavior. To allow longitudinal in vivo imaging, we conceived the novel approach of transplanting LNs into
the mouse ear pinna. Transplanted LNs maintain the structural and cellular organization of conventional secondary lymphoid organs. They participate in lymphocyte
recirculation and exhibit the capacity to receive and respond to local antigenic challenge. The same LN could be repeatedly imaged through time without the requirement for surgical exposure, and the dynamic behavior of the cells within the transplanted LN could be characterized. Crucially, the use of blood vessels as fiducial markers also allowed precise re-registration of the same regions for
longitudinal imaging. Thus, we provide the first demonstration of a method for repeated, noninvasive, in vivo imaging of lymphocyte behavior
Identity-based non-interactive key distribution with forward security
No full textThe second author acknowledges support of FICYT (project IB-08-147) and Spanish MEC (project MEC-07-MTM2007-67884-C04-01 and FPU grant AP2007-03141, cofinanced by the European Social Fund)
Efficacy and safety of empagliflozin in glycogen storage disease type Ib: Data from an international questionnaire
No full textPurpose: This paper aims to report collective information on safety and efficacy of empagliflozin drug repurposing in individuals with glycogen storage disease type Ib (GSD Ib). Methods: This is an international retrospective questionnaire study on the safety and efficacy of empagliflozin use for management of neutropenia/neutrophil dysfunction in patients with GSD Ib, conducted among the respective health care providers from 24 countries across the globe. Results: Clinical data from 112 individuals with GSD Ib were evaluated, representing a total of 94 treatment years. The median age at start of empagliflozin treatment was 10.5 years (range = 0-38 years). Empagliflozin showed positive effects on all neutrophil dysfunction–related symptoms, including oral and urogenital mucosal lesions, recurrent infections, skin abscesses, inflammatory bowel disease, and anemia. Before initiating empagliflozin, most patients with GSD Ib were on G-CSF (94/112; 84%). At the time of the survey, 49 of 89 (55%) patients previously treated with G-CSF had completely stopped G-CSF, and another 15 (17%) were able to reduce the dose. The most common adverse event during empagliflozin treatment was hypoglycemia, occurring in 18% of individuals. Conclusion: Empagliflozin has a favorable effect on neutropenia/neutrophil dysfunction–related symptoms and safety profile in individuals with GSD Ib. © 2022 The Author
ANALISIS MEKANISME PERHITUNGAN BAGI HASIL AKAD MUDHARABAH PADA PRODUK TABUNGAN TAAT iB DI BPRS DAYA ARTHA MENTARI KANTOR CABANG GEMPOL KABUPATEN PASURUAN
No full textThe banking industry is currently competing to provide convenience in meeting the needs of a growing community. One of them is the community's need for lifestyle changes that are increasingly modern, which is one of the banking opportunities to help, namely through fundraising called Savings. BPRS Daya Artha Mentari KC Gempol as a pioneer of Islamic banking in Indonesia has also created products to help its customers obtain fundraising services with various types of programs, one of which is the iB TaaT Savings. In this study, using a descriptive method. The data collection method that the author uses is literature study, observation, recording, and interviews. Based on the research conducted by the author, the author can conclude that this study is entitled Analysis of the Mechanism of Calculation of Profit Sharing for Mudharabah Contracts on TaaT iB Savings Products at BPRS Daya Artha Mentari KC Gempol according to an Islamic Economics review. TaaT iB Savings is a savings product with the mudharabah principle. Therefore, the authors are interested in further researching how exactly the iB TaaT Savings is, and how the function of the Education Savings is for both the bank and the customer and how the Islamic economy reviews the iB TaaT Savings
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