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      • KCI등재

        Capacity Estimation of Optical Wireless Communication Systems over Moderate to Strong Turbulence Channels

        Hector E. Nistazakis,George S. Tombras,Antreas D. Tsigopoulos,Evangelia A. Karagianni,Michael E. Fafalios 한국통신학회 2009 Journal of communications and networks Vol.11 No.4

        Optical wireless communication (OWC) systems are rapidly gaining popularity as effective means of transferring data at high rates over short distances. OWC facilitates rapidly deployable, lightweight, high-capacity communication without licensing fees and tariffs. Nevertheless, the performance of this new technology depends strongly on the atmospheric conditions and the characteristics of the link. In this work, we study the influence of these parameters on both the average (ergodic) capacity and the outage capacity of an OWC system over moderate to strong turbulence channels modeled by gamma-gamma distribution. Moreover, we compare the results that we obtain estimating the average and outage capacities.

      • KCI우수등재

        High quality genome sequence of Treponema phagedenis KS1 isolated from bovine digital dermatitis

        Hector M. Espiritu,Lovelia L. Mamuad,Sujeong Jin,Seon-Ho Kim,이상석,조용일 한국축산학회 2020 한국축산학회지 Vol.62 No.6

        Treponema phagedenis KS1, a fastidious anaerobe, was isolated from a bovine digital dermatitis (BDD)-infected dairy cattle in Chungnam, Korea. Initial data indicated that T. phagedenis KS1 exhibited putative virulent phenotypic characteristics. This study reports the whole genome assembly and annotation of T. phagedenis KS1 (KCTC14157BP) to assist in the identification of putative pathogenicity related factors. The whole genome of T. phagedenis KS1 was sequenced using PacBio RSII and Illumina HiSeqXTen platforms. The assembled T. phagedenis KS1 genome comprises 16 contigs with a total size of 3,769,422 bp and an overall guanine-cytosine (GC) content of 40.03%. Annotation revealed 3,460 protein-coding genes, as well as 49 transfer RNA- and 6 ribosomal RNA-coding genes. The results of this study provide insight into the pathogenicity of T. phagedenis KS1.

      • Poster Session : PS 0323 ; Hematology : Apixaban as a Therapeutic Option in Heparin-Induced Thrombocytopenia in a Patient on Hemodialysis

        ( Hector Raul Ibarra Sifuentes ),( Guillermo Ruben Garcia Delgado ),( Roberto Monreal Robles ),( Daniel Gallegos Arguijo ),( Perla Rocio Colunga Pedraza ),( Luis Javier Marfil Rivera ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

        A 50-years-old woman came to the emergency room due to uremic syndrome; she was referred to start renal replacement therapy. Her past medical history was signifi - cant for long-standing type 2 diabetes and hypertension (evolving over 4 years), both conditions irregularly treated. On the night of her admission, a right femoral Mahurkar catheter was placed through an ultrasonography guided technique, and hemodialysis was thus started. Unfractionated heparin (UFH) was used as a bolus at the start of the session, subcutaneous UFH was also used as thromboprophylaxis during her hospital stay. On day 4 the second hemodialysis was performed. She clinically improved after 6 days of hospitalization, and was switched from hemodialysis to peritoneal dialysis. At admission, moderate thrombocytopenia (118 K/uL) was found, which was exhaustively investigated without identifying its cause. On day 10, showed at the physical examination painful, pitting edema, and limitation in walking. Deep venous thrombosis was then diagnosed by color Doppler ultrasonography, and anticoagulation with UFH and warfarin was started. The next day platelet count (PC) fell by 67% (absolute PC: 23. 6 K/uL), so early-onset HIT was suspected. According to the 4Ts score, our patient had a high pretest probability for HIT, therefore UFH and warfarin were discontinued. Treatment options were discussed with the patient in detail; we obtained an informed consent from her, and started her on apixaban. On day 15 her PC improved to 75 K/uL; and on day 18 to 128 K/uL. A low-dose warfarin (5 mg qd) was started together with apixaban for fi ve days. The INR was maintained within the therapeutic range during her hospital stay. On day 22 apixaban was discontinued, and she continued solely on warfarin. Prior to discharge her PC was entirely recovered (231 K/uL).

      • A DTN System for Nanosatellite-based Sensor Networks using a New ALOHA Multiple Access with Gateway Priority

        Hector Bedon,Carlos Miguel,Angel Fernandez,Jong Sou Park 한국산학기술학회 2013 SmartCR Vol.3 No.5

        This paper presents and evaluates a new communications architecture to provide services to terrestrial sensor networks using a space delay-tolerant networking (DTN)?based solution. We propose a new multiple access mechanism based on extended unslotted ALOHA that takes into account the priority of gateway traffic, which we call ALOHA multiple access with gateway priority (ALOHAGP). We assume a finite sensor population model and a saturated traffic condition where every sensor always has frames to transmit. The performance was evaluated in terms of effective throughput, delay and system fairness. In addition, a DTN convergence layer (ALOHAGP-CL) has been defined as a subset of the standard TCP-CL (Transmission Control Protocol-Convergence Layer). Through simulations, this paper reveals that ALOHAGP/CL adequately supports the proposed DTN scenario, mainly when reactive fragmentation is used.

      • HOW AN INDIVIDUAL’S SELF-CONSTRUALS, COSMOPOLITAN AND LOCAL ORIENTATION AFFECT THE IMPACT OF THE FOUR SELF-CONGRUITY TYPES ON BRAND ATTITUDE

        Hector Gonzalez Jimenez,Fernando Fastoso,Kyoko Fukukawa 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.4

        This study empirically investigates how four individual-level characteristics impact the effect of the four self-congruity types on brand attitude. A widely used practice among marketers focuses on communicating that using their brands will bring consumers closer to how they would like to see themselves, their ideal self-concept (e.g. being a slim person like the models in the ads), instead of how they actually see themselves, their actual self-concept. However, recent research shows that there is no “universality” of a superior self-congruity effect. Specifically, individual-level characteristics (e.g. self-esteem levels, product involvement levels) determine if actual or ideal self-congruity impact brand perceptions more strongly (Malär, Krohmer, Hoyer & Nyffenegger, 2011). This study extends that research by (a) considering all four self-congruity types (actual, ideal, social, and ideal social) and (b) four additional individual-level characteristics, which are valuable for segmenting consumer markets within and across countries. The four individual-level characteristics are a dominant independent self-construal, interdependent self-construal, cosmopolitan orientation and local orientation. Considering these individual-level characteristics offers marketers insights on which of the four self-concept types they should try to match with their brand communications when targeting these specific consumer groups. Survey data from a non-student sample was collected in the US. After performing data cleaning procedures, 800+ usable responses were analysed with the use of PLS-SEM (Lohmöller, 1989). The measurement models demonstrate satisfactory reliability, convergent and discriminant validity. Furthermore, the results suggest that the data is not compromised by non-response bias and common method variance. The structural models display satisfactory predictive capabilities of the four self-congruity types on brand attitude. The findings show that as expected an individual’s dominant independent self-construal, interdependent self-construal, cosmopolitan and local orientation impact which of the four self-congruity types has the strongest effect on brand attitude. For individuals with a dominant local orientation or interdependent self-construal, actual self-congruity has the strongest effect on brand attitude. For individuals with a dominant cosmopolitan orientation or independent self-construal, ideal self-congruity has the strongest effect on brand attitude. The findings of this study extend self-congruity theory by considering the effect of these four individual-level characteristics. Managerial implications are also presented.

      • AUTHENTIC VERSUS ASPIRATIONAL BRANDING: AN INDIVIDUAL AND COUNTRY LEVEL STUDY OF THE ACTUAL AND IDEAL SELF-CONGRUITY EFFECT

        Hector Gonzalez-Jimenez,Fernando Fastoso,Kyoko Fukukawa 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7

        Research offers conflicting evidence with regard to the potential effectiveness of using authentic (focused on the actual self) versus aspirational branding (focused on the ideal self) strategies. This study extends previous research by modelling how four individual characteristics of value for cross-cultural market segmentation (an individual’s level of independence, interdependence, cosmopolitan orientation and local orientation) influence the actual and ideal self-congruity effects. The model is tested by using survey data from US (n=828) and Indian non-student consumers (n=824). Findings show that the actual self-congruity effect on brand attitude is stronger than the ideal self-congruity effect for interdependents and locals. Conversely, the ideal self-congruity effect on brand attitude is stronger than the actual self-congruity effect for independents and cosmopolitans. The study offers practitioners suggestions on the use of authentic versus aspirational branding strategies in their brand communications in order to elicit most positive brand attitude among consumers depending on their individual characteristics.

      • KCI등재

        El Canon del Pensamiento de las Élites Hispanoamericanas

        Hector J. Maymi-Sugranes,Nadia Nieblas Nunez 한국라틴아메리카학회 2011 라틴아메리카연구 Vol.24 No.3

        Since independence from Spain until the end of the 20th century, the Hispano-American elite cannon represents a challenge to the region’s cultural diversity because this canon is based upon the ideals of exclusion and discrimination. The evolution of these ideas is a dialectical and historical process in which social groups once excluded are successively included in the elites’ discourses and imaginaries. Sometimes progress in gaining acceptance results from the resistance and struggle carried out by marginalized groups, whereas in other cases the elites themselves integrate them as a method to perpetuate control over society. This essay focuses on the great challenge that the Hispano-American thinking represents to cultural diversity and to the democratization of the region.

      • An Economic and Environmental Assessment of Future Electricity Ggen eration Mixes in Japan : An Assessment Using the E3MG Macro-econom etric Model

        ( Hector Pollitt ),( Lee Soo-cheol ),( Park Seung-joon ),( Kazuhiro Ueta ) 한국환경경제학회, 한국자원경제학회 ( 구 한국환경경제학회 ) 2013 한국환경경제학회 학술발표논문집 Vol.2013 No.하계

        In this paper we consider future options for Japanese energy and climate policy. We assess the economic and environmental impacts of changing the share of electricity generated by nuclear power and varying the mid-term GHG targets.The quantitative approach we use is based on the global macro-econometric E3MG model. Our analysis reveals that the scenariosin which there are reducedor no nuclear power result in the most favourable outcomes for the Japanese economy, but that the differences between the outcomes of the different scenarios are not large. Our results also show a double-dividend effect if (revenue-neutral) carbon taxes are levied in order to meet the GHG reduction targets. However, our analysis suggests that a very high carbon tax rate would have to be imposed in order to achieve a 25% reduction in GHG emissions (compared to 1990 levels) while simultaneously phasing out nuclear power.

      • Poster Session:PS 0536 ; Nephrology : Mortality Factors Associated to Hemodialysis Patients with End Stage Renal Disease (ESRD), in a Teaching Hospital

        ( Hector Raul Ibarra Sifuentes ),( Victor Ivan Segura Huicochea ),( Perla Rocio Colunga Pedraza ),( Miguel Angel Flores Caballero ),( Jose Guadalupe Martinez Jimenez ),( Concepcion Sanchez Martinez ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

        Background: Patients on hemodialysis have a death rate adjusted for age four to fi ve times higher than the general population, so early nephrology referral affects survival, also the presence of hypoalbuminemia, hyperphosphatemia, and anemia. Methods: Descriptive, observational, prospective, Unicentric Trial, involved patients with ESRD who entered the emergency area in a teaching hospital, indicating Interventional Hemodialysis (HI), which were studied for 90 days; Demographic, clinical and laboratory data were collected. Patients were followed by phone call and meeting at 30, 60 and 90 post-HI days. Statistical analysis were realized with SPSS 18 for Windows, performed descriptive statistics and survival by Kaplan-Meier was conducted. Results: In this trial were included 41 patients, mean age 50.59 years (range 17-76 years), 23 men (56.1%). The rating for nephrologist was recorded in 9 (22%). The data results were Albumin, 2.88 ± 0.57 mg/dL, phosphate, 9.48 ± 2.90 mg/dL, Hemoglobin 7.22 ± 1.42 g/dL. From the total of patients, 15 (36.6%) died within 90 days; of which 9 (60.9%) were men; Albumin levels were lower in those who died when compare with the living (2.79 vs 2.93), phosphate levels were higher when compare to living (9.97 vs 9.20); and the level of Hb was higher in those who died (7.5 vs 7.0). Survival rates at 30, 60 and 90 days were 92.7%, 85.4% and 63.4% respectively. Conclusions: Mortality found in this study is high compared with reported worldwide. When the nephrologist referral was analyzed, patients who died were the same as the number of patients without prior reference. Hypoalbuminemia and hyperphosphatemia correlate with mortality, as demonstrated in previous studies. Importantly, in our population, patients who died, had a higher hemoglobin level when compare with survivors.

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