1,721,245 research outputs found
Neurological Manifestations of COVID-19 Patients and Management
No full textSARS-CoV-2 was fi rst observed in Wuhan, China, and quickly spread throughout the world, proclaimed as a pandemic by WHO.Most reported cases have respiratory symptoms, but many cases are seen with neurological signs as initial or related presentations [1].
With the fl ow of time, massive data on various aspects of the disease, such as manifestations, pathology, transmission, prevention, and management strategies, has begun to emerge [2,3]. Myalgia and fatigue, dizziness, headache, anosmia, ageusia, and altered mental status are relatively common in Covid patients with preexisting comorbidities [4]. Also, known risk factors associated with neurological symptoms include advanced age, heart failure, coronary artery disease, hypertension, dyslipidemia, diabetes mellitus, obesity, chronic obstructive pulmonary disease, asthma, chronic renal failure, liver disease, malignancy, smoking, immunosuppression [5]
Structural hybridization and economical optimization of strengthening systems used for concrete beams / Md. Moshiur Rahman
Get PDFStrengthening of an existing structure is often necessary to increase its load carrying capacity to meet new strength and serviceability requirements. However, strengthening can lead premature failure and efficient usage of the strengthening materials should be emphasized. Therefore, an efficient strengthening method along with the preparation of relevant design guidelines is urgently required. To address this issue a combination of external bonding reinforcement (EBR) and Near Surface Mounting (NSM) technique was developed and tested in this study. The proposed technique is called the hybrid strengthening method (HSM). In this study, efficient approach of strengthening reinforced concrete beam were also studied along with introduction of HSM. To prevent premature failure the use of end anchorage, shear strengthening and side HSM were employed. In order to make strengthening method efficient, steel bar with cement mortar was also used to replace the fibre reinforced polymer (FRP) and epoxy. Semi-numerical and finite element models were developed and validated with the experimental results to be used in the preparation of design guidelines. To help the designer reduce the strengthening cost further, mathematical design optimization techniques are also presented.
For this study, thirty-three reinforced concrete beams were cast and tested. These were designed to address the objectives described above. The strengthening materials used comprised of steel bars, steel plates and CFRP composites with different dimensions were used for strengthening. The beams were extensively instrumented to monitor loads, deflections, and strains. The beams were subjected to static and fatigue loadings.
Semi-numerical models were formulated to initiate the preparation of the design procedure of the HSM beam. In these models, an analytical approach was made with the help of the genetic algorithm optimization procedure to avoid time-consuming trial and error. In addition, finite element models (FEM) from the ABAQUS package to predict flexural strength and deflection were used to do the parametric study. In the mathematical design optimization method, the strengthening cost was minimized using non-linear programming and genetic algorithms where flexural strength and serviceability requirements were used as the major constraints.
From the experimental results, the HSM beam, in general, gave about 65% higher flexural capacities as compared to the control beam at best. In terms of the efficiency, the HSM beams showed a 36% increase in flexural capacities as compared to the EBR beam. The partial replacement of epoxy adhesive with cement mortar in NSM strengthening reduced costs without significantly affecting the flexure performance. The fatigue performance of the HSM strengthened beam was found to be at least 6.5% higher than that of the NSM strengthened beam. The semi-numerical and finite element models were shown to be able to give consistent results as compared to the experimental results. The application of the optimization method led to savings of up to 8% in the amount of strengthening materials used as compared to classical design solutions
The expression of pre- and postcopulatory sexually selected traits reflects levels of dietary stress in guppies.
Get PDFEnvironmental and ecological conditions can shape the evolution of life history traits in many animals. Among such factors, food or nutrition availability can play an important evolutionary role in moderating an animal's life history traits, particularly sexually selected traits. Here, we test whether diet quantity and/or composition in the form of omega-3 long chain polyunsaturated fatty acids (here termed 'n3LC') influence the expression of pre- and postcopulatory traits in the guppy (Poecilia reticulata), a livebearing poeciliid fish. We assigned males haphazardly to one of two experimental diets supplemented with n3LC, and each of these diet treatments was further divided into two diet 'quantity' treatments. Our experimental design therefore explored the main and interacting effects of two factors (n3LC content and diet quantity) on the expression of precopulatory (sexual behaviour and sexual ornamentation, including the size, number and spectral properties of colour spots) and postcopulatory (the velocity, viability, number and length of sperm) sexually selected traits. Our study revealed that diet quantity had significant effects on most of the pre- and postcopulatory traits, while n3LC manipulation had a significant effect on sperm traits and in particular on sperm viability. Our analyses also revealed interacting effects of diet quantity and n3LC levels on courtship displays, and the area of orange and iridescent colour spots in the males' colour patterns. We also confirmed that our dietary manipulations of n3LC resulted in the differential uptake of n3LC in body and testes tissues in the different n3LC groups. This study reveals the effects of diet quantity and n3LC on behavioural, ornamental and ejaculate traits in P. reticulata and underscores the likely role that diet plays in maintaining the high variability in these condition-dependent sexual traits
Genetic Characterization of Clinical Acanthamoeba Isolates Using Gene Loci of Nuclear and Mitochondrial Small Subunit Ribosomal RNA
Get PDF金沢大学博士（医学）博士論文本文Full 以下に掲載：The Korean Journal of Parasitology 51(4) pp.401-411 2013. Korean Society for Parasitology and Tropical Medicine. 共著者：Md Moshiur Rahman, Kenji Yagita, Akira Kobayashi, Yosaburo Oikawa, Amjad I.A. Hussein, Takahiro Matsumura and Masaharu Tokorodoctoral thesi
Molecular characterization of various Trichomonad s ecies isolated from humans and related mommRls in Indonesia
No full text博士論文本文Full 以下に掲載：The Korean Journal of Parasitology 52(5) pp.471-478 2014. Korean Society for Parasitology and Tropical Medicine. 共著者：Mudyawati Kamaruddin, Masaharu Tokoro, Md. Moshiur Rahman, Shunsuke Arayama, Anggi P.N. Hidayati, Din Syafruddin, Puji B.S. Asih, Hisao Yoshikawa, Ei Kawahar
Genetic Characterization of Clinical Acanthamoeba Isolates Using Gene Loci of Nuclear and Mitochondrial Small Subunit Ribosomal RNA
No full text博士論文本文Full 以下に掲載：The Korean Journal of Parasitology 51(4) pp.401-411 2013. Korean Society for Parasitology and Tropical Medicine. 共著者：Md Moshiur Rahman, Kenji Yagita, Akira Kobayashi, Yosaburo Oikawa, Amjad I.A. Hussein, Takahiro Matsumura and Masaharu Tokor
Molecular characterization of various Trichomonad s ecies isolated from humans and related mommRls in Indonesia
No full text金沢大学博士(保健学)博士論文本文Full 以下に掲載：The Korean Journal of Parasitology 52(5) pp.471-478 2014. Korean Society for Parasitology and Tropical Medicine. 共著者：Mudyawati Kamaruddin, Masaharu Tokoro, Md. Moshiur Rahman, Shunsuke Arayama, Anggi P.N. Hidayati, Din Syafruddin, Puji B.S. Asih, Hisao Yoshikawa, Ei Kawaharadoctoral thesi
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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