Exact internal waves of a Boussinesq system

We consider a Boussinesq system describing one-dimensional internal waves which develop at the boundary between two immiscible fluids, and we restrict to its traveling waves. The method which yields explicitly all the elliptic or degenerate elliptic solutions of a given nonlinear, any order algebraic ordinary differential equation is briefly recalled. We then apply it to the fluid system and, restricting in this preliminary report to the generic situation, we obtain all the solutions in that class, including several new solutions.Comment: 11 pages, Waves and stability in continuous media, Palermo, 28 June-1 July 2009. Eds. A.Greco, S.Rionero and T.Ruggeri (World scientific, Singapore, 2010

Serological and molecular surveillance of Orientia tsutsugamushi in scrub typhus patients and coinfection of Huaiyangshan banyangvirus

학위논문 (박사) -- 서울대학교 대학원 : 의과대학 의과학과, 2020. 8. 조남혁.1. Introduction: Scrub typhus is a mite-borne infectious disease caused by Orientia tsutsugamushi. Huaiyangshan banyangvirus (formerly Severe fever with thrombocytopenia syndrome virus (SFTSV)) is a tick-borne virus that can cause hemorrhagic fever. Severe fever with thrombocytopenia syndrome (SFTS) is emerging in Eastern Asia, including China, South Korea, and Japan, which are endemic region of scrub typhus. As the two infections overlap epidemiologically and clinically, knowledge on the local prevalence of the vector-borne infections is critical in target-oriented investigation and treatment.2. Methods: To investigate the genotypic diversity of O. tsutsugamushi and potential coinfection with SFTSV in South Korea and Myanmar, 2,328 sera collected from patients with acute febrile illness in South Korea from 2000 to 2003 and 152 sera obtained from suspected patients with scrub typhus in Myanmar during 2018 were examined. I performed serological and molecular diagnosis of scrub typhus and SFTS. Phylogenetic analysis of both pathogens were also performed by sequencing of the amplified genes from O. tsutsugamushi and SFTSV.3. Results: Among 2,328 samples from Korean patients, serological analysis detecting specific IgG against SFTSV NP antigen identified 37 positive samples (1.6%). Molecular detection of SFTSV NP gene and O. tsutsugamushi tsa56 gene by PCR using the 37 specimens revealed 9 positive for SFTSV and 14 positive for O. tsutsugamushi, respectively. Sequencing of 14 Orientia-specific PCR products showed the presence of 3 genotypes, including Boryong (1/37, 2.7%), Karp (8/37, 21.6%) and Gilliam (4/37, 10.8%) genotypes. In addition, 4 specimens were positive for both SFTSV NP gene and O. tsutsugamushi tsa56 gene, indicating coinfections. Among 152 Myanmar samples, 9 samples (5.9%) were positive for O. tsutsugamushi tsa56 gene and sequencing of the PCR products revealed the presence of 5 genotypes, Karp A (4/9, 44,4%), Karp B (1/9, 11.1%), Kato B (2/9, 22.2%), Gilliam (1/9, 11.1%) and JG_C (1/9, 11.1%). 5 samples were positive for SFTSV NP gene-specific PCR (5/152, 3.28%). These 5 SFTSV NP gene positive samples were all negative for O. tsutsugamushi tsa56 gene, but 3 of them carried high titers (≥1:2,560) of IgG or IgM or both antibodies specific to O. tsutsugamushi, as measured by indirect immunofluorescence assay. 4. Conclusion: In this study, serological and molecular surveillance of sera collected from suspected scrub typhus patients in South Korea and Myanmar revealed serological prevalence and genotypic heterogeneity of O. tsutsutsugamushi. Moreover, potential coinfection of O. tsutsugamushi and SFTSV was identified by serological and molecular surveillance. These results suggest that SFTSV infections might have been spread more widely in Eastern Asia. Therefore, continuous surveillance of SFTS patients needs to be conducted in the local area. In addition, more reliable differential diagnosis techniques and prevention and control measures are required for better clinical practices and outcomes in the endemic regions of multiple tick-borne and mite-borne pathogens.INTRODUCTION 7 MATERIALS AND METHODS 16 RESULTS 23 DISCUSSION 54 REFERENCES 63 ABSTRACT IN KOREAN 73Docto

SONOCHEMICAL DEGRADATION OF CARBON TETRACHLORIDE IN AQUEOUS SOLUTION AT TWO FREQUENCIES : 200KHZ AND 600KHZ, 200W ACOUSTIC POWER

Joint Research on Environmental Science and Technology for the Eart

RELATIONSHIPS OF TEMPERATURE AND HUMIDITY TO THE BIODEGRADATION OF PETROLEUM HYDROCARBONS IN SOILS

This work focused on monitoring CO2production, microbial growth and residual hydrocarbon concentration during bioremediation experiments performed on laboratory soil microcosms. A natural soil was artificially contaminated with hexadecane and adjusted with inorganic nutrients to stimulate biodegradation. Microbial growth, CO2production and residual hexadecane were periodically monitored at different soil water contents ranging from 0.15 to 0.25 g water g_1 of dry soil and at different temperatures ranging from 20 to 25oC. Results showed that the humidity has a greater effect on microbial activity and contaminant degradation than the temperature. The study established the experimental regression equation of temperature and humidity to the hexadecane mineralization rate, an important parameter in assessing the ability to convert organic carbon into inorganic carbon. The difference between the results of the hexadecane mineralization rate obtained from the experiment and calculated from the regression equation is not too high, from 2% to 20%

Catholic Relief Services: Information and Communication Technology in Monitoring and Evaluation

In February 2015, Catholic Relief Services (CRS) Vietnam initiated a new project to support the reintegration and rehabilitation of survivors of accidents involving landmines and explosive remnants of war (ERW). With funding from the Office of Weapons Removal and Abatement in the U.S. Department of State’s Bureau of Political-Military Affairs (PM/WRA), CRS’ Access and Reintegration (A&R) project takes a comprehensive approach to serving the needs of 3,219 survivors of landmines and unexploded ordnance (UXO) in Quang Binh and Quang Tri provinces. Through collaboration with the Government of Vietnam’s provincial Department of Labor, Invalids and Social Affairs (DOLISA), CRS provides survivors with access to medical care, rehabilitation, and social and livelihood support services. The key to success has been establishing an effective and functional coordination system at the local level for referrals, strengthening a network of community-based workers, and supporting families to provide appropriate, home-based care and support. CRS’ A&R project creates a network of support that ensures increased access to comprehensive services for survivors and advances their reintegration into society. The A&R Project has established a model for scaling to six affected districts in the targeted provinces and beyond

Design and analysis of high-Q metasurfaces using multipole expansion

Department of Electrical EngineeringDespite numerous potential advantages of sub-radiative dark modes due to an extremely high quality factor, the practicality still depends on the consistency of excitations for a tight fabrication tolerance. This work proposes a novel approach to adaptive transitions between different dipole moments to allow for consistent excitation of Fano and electric quadrupole resonances that are extremely sensitive to geometric errors. The proposed geometry of each metamolecule consists of four strips printed on a thin dielectric film with four gaps between the strips, and the geometric error is described as structural deformation by adjusting the strip lengths and gap sizes in the vertical direction. In each deformed state, current and magnetic-field distributions are analyzed to interpret operating principles, and multipole moments are calculated based on the multipole expansion using the current distributions. The results demonstrate that the consistent excitation of the electric quadrupole moment is enabled based on a simultaneous transition between toroidal and electric dipole moments, and the Fano resonance is consistently excited by the magnetic-to-electric dipole moment transition. For verification, original and deformed metasurfaces are fabricated, and their transmission and reflection coefficients are measured in a semi-anechoic chamber to experimentally validate the proposed dipole moment transitions. The results confirm that the proposed approach has great potential to bring advances in recent sensing and energy harvesting applications where an extremely high quality factor is essential.clos

Does it match? Analyzing self-reported online dermatology match data to Charting Outcomes in the Match

Dermatology is arguably the most competitive residency (81.6% match rate for United States allopathic seniors) with significantly more applicants than available positions. To objectify this process, the National Residency Match Program (NRMP) has produced bi-annual Charting Outcomes in Match (COM) datasets, which aggregate data from the prior two application cycles and tabulate statistics to aid applicants. In parallel, online forums provide medical trainees with vast amounts of information, including residency application insights. Reddit medical school subforum compiles annual spreadsheets of anonymous, individualized applicant data to aid future applicants. We compared this data to NRMP data to show that although the data means are similar (e.g. Step 1), the Reddit dermatology spreadsheet collects more data and the individualized nature aids applicants in a personalized way unlike the mean aggregate data in NRMP. Under univariate analysis, Alpha Omega Alpha status, overall publications, and dermatology-specific publications are associated with interview invitation rates. Although limitations of the study include small data size and reporting bias, this is the first of its kind to our knowledge to compare these two often-used tools to aid dermatology applicants. Future endeavors should expand anonymous data reporting and use the data to carry out more extensive studies to investigate factors influencing the application process

Isolation and determination of Vibrio spp. pathogen from Sciaenops ocellatus suffering from hemorrhagic disease under cage culture in Vietnam

This study was carried out to isolate and determine the Vibrio spp. from the Red drum fish (Sciaenops ocellatus) suffering from the hemorrhagic disease in Vietnam.  In this study, 18 strains of Vibrio bacteria were identified from 27 samples of Red drum fish. The isolated bacterial strains were identified with the 16S rRNA sequencing method and checked for morphological, physiological, and biochemical characteristics by using the API 20E KIT. Results of the study revealed the presence of twelve strains of V. alginolyticus, three strains of V. fluvialis, and three strains of V. orientalis. All Vibrio strains have gene similarities with those on the Genbank ranging from 98.05 to 100%. The biochemical characteristics of these 18 isolates were similar and these are susceptible to tetracycline and doxycycline and entirely resistant to ampicillin, amoxicillin, and erythromycin

LBMT team at VLSP2022-Abmusu: Hybrid method with text correlation and generative models for Vietnamese multi-document summarization

Multi-document summarization is challenging because the summaries should not only describe the most important information from all documents but also provide a coherent interpretation of the documents. This paper proposes a method for multi-document summarization based on cluster similarity. In the extractive method we use hybrid model based on a modified version of the PageRank algorithm and a text correlation considerations mechanism. After generating summaries by selecting the most important sentences from each cluster, we apply BARTpho and ViT5 to construct the abstractive models. Both extractive and abstractive approaches were considered in this study. The proposed method achieves competitive results in VLSP 2022 competition.Comment: In Proceedings of the 9th International Workshop on Vietnamese Language and Speech Processing (VLSP 2022