Zika virus, mosquito-borne disease, caused by mosquitoes has been increased the importance. From March to September, twice a month from 7 different points (3 residential areas, 3 migratory bird sanctuary and 1 cattle shed) were collected using BG trap and BL trap. After identifying the mosquitoes collected, we confirmed the virus infection. Total 26,531 mosquitoes (6 genus 9 species) were collected, virus has been detected from the 3 species (Aedes vexans, Cuilex tritaeniorhynchus, and Amigeres subalbatus) of mosquitoes of them. It showed the highest peak in August, and then gradually decreased. The most common mosquito species was collected Aedes vexan (16,637) in the cattle shed.

Bacterial fruit blotch(BFB) of cucurbits caused by Acidovorax citrulli(Acc) continues to diminish fruit yields. The aim of this study was to address whether two genetically distinct populations of Acc are present in watermelon-growing fields in Korea. For this purpose, we used the enterobacterial repetitive intergenic consensus polymerase chain reaction(ERIC-PCR) profiling and substrate-utilization profiles. According to the results of ERIC-PCR, group I and II strains showed clearly differentiated PCR-based fingerprinting profiles. Differences between group I and II strains included amplification of unique, group-specific DNA fragments such as the 1.3-, 0.28-, and 0.25-kb fragments in ERIC-PCR. Acc stains belonging to group I did not use L-leucine, whereas group II strains did use the substrate. Our results support the genetic differentiation of Acc strains into two groups and demonstrate that Acc strains from both groups are previously existed in watermelon-growing fields in Korea. Information about the genetic diversity of Acc under the present study will help scientists and managers form strategies to control BFB.

Mealybugs (Hemiptera: Pseudococcidae) are major pests of a wide range of crops and ornamental plants worldwide, and represented by 56 species in Korea. Occurrence of, or damage by, the longtailed mealybug, Pseudococcus longispinus Targioni-Tozzetti has not been reported since 2002. However, for the first time in many years, P. longispinus was reported at Phalaenopsis orchids by Kim et al in 2015. Therefore, the present study aimed to investigate the distribution of P. longispinus which is usually found inside a greenhouse or a building where the host plants are. We have collected 129 mealybug samples at 254 sites from Korea. Among these, 27 of P. longispinus and 62 of an unidentified Pseudococcus species were found mainly in ornamental plants such as Heteropanax fragrans, commonly known as happy trees in Korea. Morphological characteristics of the unidentified mealybug were very similar to those of P. longispinus. However, the genetic variability in COI sequence comparison was significantly different between the two species. Further studies are needed to clarify the valid name for this unidentified species, and we are currently working on it.

The purpose of the study was to investigate the causal relationships among factors affecting L2 reading achievement using a structural equation modeling (SEM) analysis. A total of 327 Korean EFL high school students completed a questionnaire on L2 reading motivation and strategies. The students’ L2 listening and reading comprehension abilities were measured by scores on the practice test for Scholastic Aptitude Test (PSAT) and self-assessed listening and reading proficiency. The study results showed that the students’ L2 reading efficacy, L2 reading strategy use, and L2 listening skills were significant predictors of their L2 reading achievement, while L2 reading motivation showed no significant relation with reading achievement. The nonsignificant path loading between reading motivation and reading achievement implies that reading motivation alone is not sufficient to promote students’ L2 reading proficiency. The final SEM model indicated a relatively strongest contribution of L2 listening ability over L2 reading efficacy and strategy use to L2 reading achievement. Pedagogical implications based on the findings are discussed.

The purpose of the study was to identify Korean high school students’ beliefs about L2 learning and a structural model that best explains the belief factors associated with L2 achievement using structural equation modeling (SEM). It has furthermore explored the effect of gender on the structural model of belief factors affecting L2 achievement. A total of 447 students (253 boys, 194 girls) at two schools completed a questionnaire containing 26 Likert-scale items. The results produced five underlying constructs: selfefficacy of English learning, importance of grammar learning, role of teacher feedback, importance of accuracy, and nature of English learning. The final SEM model showed that both self-efficacy of English learning and importance of grammar learning were positive, direct, and significant predictors of L2 achievement. Role of teacher feedback and nature of English learning, however, were indirectly related to the L2 achievement through the mediating role of self-efficacy of English learning. The study also provided empirical evidence that gender moderated the causal relationships among belief factors affecting L2 attainment. Based on the findings, pedagogical implications to improve L2 instruction were suggested.

Opioid receptors have been pharmacologically classified as µ, δ, κ and ε. We have recently reported that the antinociceptive effect of morphine (a µ-opioid receptor agonist), but not that of β-endorphin (a novel µ/ε-opioid receptor agonist), is attenuated by whole body irradiation (WBI). It is unclear at present whether WBI has differential effects on the antinociceptive effects of µ-, δ-, κ- and ε-opioid receptor agonists. In our current experiments, male ICR mice were exposed to WBI (5Gy) from a 60 Co gamma-source and the antinociceptive effects of opioid receptor agonists were assessed two hours later using the hot water (52℃) tail-immersion test. Morphine and D-Ala2,N-Me-Phe4,Gly-ol-enkephalin (DAMGO), [D-Pen2-D-Pen5]enkephalin (DPDPE), trans-3,4-Dichloro-N-methyl-N-[2-(1-pyrrolidinyl)- cyclohexyl]¬benzeneacetamide (U50,488H), and β-endorphin were tested as agonists for µ, δ, κ, and ε-opioid receptors, respectively. WBI significantly attenuated the antinociceptive effects of morphine and DAMGO, but increased those of β-endorphin. The antinociceptive effects of DPDPE and U50,488H were not affected by WBI. In addition, to more preciously understand the differential effects of WBI on µ- and ε¬opioid receptor agonists, we assessed pretreatment effects of β-funaltrexamine (β-FNA, a µ-opioid receptor antagonist) or β-endorphin1-27 (β-EP1-27, an ε-opioid receptor antagonist), and found that pretreatment with β-FNA significantly attenuated the antinociceptive effects of morphine and β endorphin by WBI. significantly reversed the β-EP1-27 attenuation of morphine by WBI and significantly attenuated the increased effects of β-endorphin by WBI. The results demonstrate differential sensitivities of opioid receptors to WBI, especially for µ- and ε-opioid receptors.

We report relative proper motion measurements of H2O masers in massive star-forming region W51 Main, based on data sets of VLBI observations for H2O masers at 22 GHz with Japanese VERA telescopes from 2003 to 2006. Data reductions and single-beam imaging analysis are to measure internal kinematics of maser spots and eventually to estimate the three-dimensional kinematics of H2O masers in W51 Main. Average space motions and proper motion measurements of H2O masers are given both graphical and in table formats. We find in this study that W51 Main appears to be associated with hyper-compact H II region with multiple massive proto-stars whose spectral types are of late O.

The rapid change of information and communication technologies (ICT) has resulted in a new gap, a digital divide between countries that can easily access ICT and digital information, and countries that lack accessibility of emerging information and communication technologies. Realizing the gap of digital divide through education, Korea launched a collaborative program called ‘APEC Cyber Education Network (ACEN)’ in 2001, targetting two economies: Indonesia and Thailand. This program provided workshops via ACEN Internet Volunteers (AIV) for training of the teachers’ capacity for economies’ beneficiary in the education of ICT. In 2003, this program has evolved into APEC Learning Community Builders (ALCoB) Internet Volunteers (AIV) program, and has continued until 2008. In this paper, we report our 8 years of experiences in collaboration between Korea and Indonesia through volunteers, and show the implications of a successful international cooperation model to overcome the digital divide between countries.

The majority of studies on L2 writing strategies to date has relied heavily on case study as a research methodology employing think-aloud protocols and texts written by the participants. Since the studies dealt with a small number of participants, the findings are inconclusive and sometimes contradictory, and little research on the writing strategies has been conducted in EFL contexts. The present study investigated EFL learners" writing strategies and compared the more-proficient writers" strategies to those of the less-proficient peers. It furthermore examined an assumption of a connection between writing strategy use and writing proficiency. The study was conducted with two writing classes that consisted of 26 more-proficient and 23 less-proficient writers. Two different proficiency groups were divided in proportion to students" scores on the diagnostic composition test. Strategies were measured by means of the modified questionnaire originally developed by Petri？ and Cz？rl (2003). The strategy items were stated in three different phases of the writing process (planning, while-writing, and revising). The results indicated that (1) the more-proficient writers used significantly more planning and while-writing strategies and (2) planning and revising strategies correlated significantly with students" composition scores.

We have investigated the optical properties of the global haze on Titan from spectra recorded between 7100 and 9200Åwhere CH4 absorption bands of various intensities occur. The Titan spectra were obtained on Feb. 23, 2005 (UT), near the times of the Cassini T3 flyby and Huygens probe, using an optical echelle spectrograph (BOES) on the 1.8-m telescope at Bohyunsan Observatory in Korea. In order to derive the optical properties of the haze as a function of altitude, we developed an inversion radiative-transfer program using an atmospheric model of Titan and laboratory CH4 absorption coefficients available from the literature. The derived extinction coefficients of the haze increase toward the surface, and the coefficients at shorter wavelengths are greater than those at longer wavelengths for the 30 - 120 km altitude range, indicating that the Titanian haze becomes optically thin toward the longer wavelength range. Total optical depths of the haze are estimated to be 1.4 and 1.2 for the 7270 -7360Åand 8940 -9150Å ranges, respectively. Based on the Huygens/DISR data set, Tomasko et al. (2005) reported total optical depths of 2.5 - 3.5 at 8290Å depending on the assumed fractal aggregate particle model. The total optical depths based on our results are smaller than those of Tomasko et al., but they partially overlap with their results if we consider a large uncertainty from possible variations of the CH4 mixing ratio over Titan's disk. We also derived the single scattering albedo of the haze particles as a function of altitude: it is less than 0.5 at altitudes higher than ~150Km the average particle radius is smaller than the wavelengths, whereas near the surface, it becomes comparable or greater.

Learning style instruments continue to enjoy widespread use despite the questionable reliability and validity. The study examined whether reliability and validity of Reid’s (1984) Perceptual Learning Style Preference Questionnaire (PLSPQ) hold true across Korean EFL college students. The PLSPQ was administered to 309 students from eight major areas. The Cronbach’s alpha coefficients, ranging from .65 to .81, yielded good reliability with the exception of the Auditory scale. Exploratory factor analysis indicating the dimensionality of the PLSPQ, however, produced that certain items did not clearly group into the six learning styles as Reid hypothesized. Thus, seven-factor solution in the present study was not conceptually consistent with Reid’s learning style model. Subsequently, a four-factor solution as an alternative would provide a more orthogonal and conceptually acceptable learning style framework for the students sampled. The study further identified the students’ preferred English learning styles and explored whether their gender and major fields of study affect the learning styles in terms of the four-factor solution. Due to the mixed evidence for the reliability and validity of the instrument, the study suggested more replication studies of the factor structure that shows distinct characteristics of Korean EFL students.

This study was designed to examine Korean EFL college students’ expectations about their native-speaking English teachers’ roles and to compare them to those of their instructors. It has also sought gender effect on students’ expectations. Data were collected using a modified version of the Survey of Educational Expectations, developed by McCargar (1993), from 346 students and 34 instructors. The questionnaire included 47 items in 11 domains of English teacher roles: instructional strategies, cultural sensitivity, subject knowledge, warmth, classroom management behaviors, questioning strategies, response to students’ errors, educational approach, teacher-student relationship, organization skills, and teaching methods. Results indicated overall similarities between students’ and teachers’ role expectations, while analyses of individual items showed much greater differences. A clear difference was found in teacher response to student errors. Students expected their native-speaking English teachers to correct their errors, while the teachers clearly disagreed with this expectation of students. The results also showed the gender differences in students’ responses. The findings of the study suggested educational implications to reduce classroom tension and dissatisfaction when there appear student-teacher mismatches in L2 teacher roles.

This qualitative study was designed to understand a role of culture on the experiences of Korean study abroad graduate students who tried to adjust to the U.S. academic and social life. Data was collected by semi-structured interviews and analyzed by the inductive process to identify analytical categories that emerged from the data. Three participants decided to go to a U.S. college in order to have an efficient learning environment, financial support, and career after schooling. They were satisfied with the factors that motivated them to study abroad as well as the American’s attitudes and observance of the rules. However, they experienced frustrations and difficulties in classrooms and in social settings due to limited English proficiency, the lack of familiarity with the American learning environment, and certain American’s unfair treatment. They developed strategies to cope with the difficulties and succeed at the university. The present study also revealed that the participants’experiential backgrounds played a crucial role in their perceptions of their own experiences in the U.S. The students acknowledged that there are cultural differences between two countries that were grounded in all findings of the research and those differences affected their attitudes and behaviors throughout the study and their stay in the U.S.

1'0 determine Lhe ll1echanism of cell c1eath incluced by iron chelators. we explored the pathways of the three structurally relatecl ll1 itogen-activatecl protein(MAP) kinase subfami li esduring iron cbelator- inclucecl apoptosis ancl differentiation of oral precancerous ancl cancel‘ cells. The iron chelator c1 eferoxamine(DFO) exertecl potent timeancl c1ose-c1epenclent inhi bitory effects on the growth of IHOK and HN4 cells The major mechanism of growth inhibition following DFO treatment was fOllncl to be apoptosis incluction. as assessecl by annexin V-FITC staining. cell cycle analysis‘ DNA lacldering, a ncl Hoechst staining. We report that DF'O s trongly activates the p38 MAP kinase and extracell ular signal- regu lated kinase(ERK). but c10es not activate the c-Jun N-terminal kin ase/ stl않s-activaLecl protein kinase(JNK/8APK) . Of the three MAP kinase blockers usecl‘ the selective p38 MAP kinase inhibitor 8ß203580 ancl ERK inhibitor PD98059 protected oral premaIignant ancl malignant cells againsL iron chelator- nclllced cell death. which incl icates that the p38 MAP kinase serves as a major mecliator 01' apoptos is induced by this iron chelator DFO also evoked the release of cytochrome c from mitochondria, and incluced the activation of caspase-3 ancl caspase-8 in oral cancer cells, which suggests that apoptosis occurs via the mi tochoncl ri on - mecl iaLed pathway. DFO enhanced the expression of Bax in IHOK ancl HN4 cells. consistent witll thei r p53 status Moreover. DFO downregulatecl the expression 01' Bcl-2 in oral cancer cells. which suggests that DFO- incluced apoptos is 01' oraJ cancer and precancerous cells may be mediatecl by an increase in the ratio of pro-apoptotic to anti-apoptotic proteins. ln terestingJy, trcatmcnt 01' IHOK ancl HN4 cel ls with 8B203580 abolishecl cytochrome c release‘ as wel l as the activation of caspase-3 and caspase-8. DFO suppressecl the expression of epithelial di ffe rentiation markers, such as involucrin, t ransglutaminase II. CK6. and CK19. ancl this suppression was blockecl by p38 ancl ERK MAP kinase ll1hlbltors The oral premalignant(IHOK) ancl malignant cell s(I-lN4) showed differential responses to DFO with respect to the expression of cel l cycle regulatory proteins. cell growth. ancl apoptosis. Coll ectively. the current study reveals that p38 MAP kinase plays an ill1 portant role in iron chela tor-mecliatecl cel l cleath and in the suppression of differentiation of oral premalignantandmalignanLcell s.by activating a c10wnstream apoptotic cascade that executes the ceIl c1eath pathway

뻐ny studìes have shown the anti-proli ferative effects of irondeprivation on cancer cell s‘ but the effects 01' iron-chelators on oral cancer have not been clearly elucidated , To investigate the effects of an iron chelato r, desferrioxamine( 01"O).on the growth of ilIllTIortali zed human o1'al ke ratinocytes(IHOK), primary oraJ cancer cel ls(HN4)‘ metastatic oral cancer cell s(HN12) , and human skin keratìnocytes(HaCaT) in the MTr assay, three-dimensional(3D) raft cul tmes, Western blott ing, cell cycJ e analysis‘ nuclear staining‘ and cytochrome c expression for apoptosis s ig naling pathway were used OFO inhibited the growth of immortalized IHOK and HaCaT and mal ignant HN4 and HN12 keratinocytes in a time- and dose-dependent manner according to the MTT assay, The 3D organotypic cu l tu re also revealed that OF'O-treated cells showed less epithelial maturation, less surface keratinizati on‘ and de creased epithelia l thickness, The major mechanìsm of growth inhìbition with the micromolar 0 1"0 treatment was by the induction of apoptosis‘ which was supported by nuclear OAPI staining, ONA fragmentation analysis, and J10w cytometric analysis for sub-Gl phase ar rest and Annexin V-1"ITC stainìng, Furthermore‘ Bax expression in creased together with p53 and p21WAF1!CIPl, whìle the Bcl-2 expression decreased in the immortalized and malig nant keratinocytes treated with 01"0 , Time-dependent cytochrome c from mitochondria was observed in D1"O-treated [l-IOK and 0 1'머 cancel‘ ceJJ s, and was accompanied by the activation of caspase-3 in IHOK cells. These resu lts demonstrate that 0 1"0 has growth inhibitory effects on immortalized and malignant oral keratinocyLes Lhrough the induction of apoptosis and suggest that further evaluation of OFO as a potcntial thcrapcutic agent for human oral precancerous and cancerous lesions is warranted