Judul: Interpersonal Communication Barriers among International Students at Graduate School of Bogor Agricultural University
Abstrak: This study focused on interpersonal communication barriers, the sociocultural and language difficulties of adaptation among international students can lead to academic issues. and aimed to identify the barriers and factors which influence interpersonal communication among international students and to examine the extent to which these factors have affected international students’ adaptation to cultural transition in learning and living in the Bogor agricultural University. This study involved both quantitative and qualitative methods. The quantitative component utilized data collected through semi structured questionnaires on 40 International students representing international students from postgraduate school of Bogor agricultural University, the qualitative component of this research utilized interviews method, while the data analysis techniques used to answer the research hypothesis is statistical analysis with SPSS and correlation. The study reached to many results, the most important of them are, there was a significant difference with respect to Characteristics of individuals in the perception of barriers to interpersonal communication among international students, though there was a significant difference in opinion among international students regarding various dimensions of academic adaptation. The majority of international students mentioned that barriers were due to the source of communication especially in Indonesian language, where 77% student are bad in speaking Indonesian language, and 80% of international students speak English very well. in addition, the results revealed that, around (54%) student find slight difficulty to understand and accept the Indonesian culture, and Correlation between GPA and Proficiency of English language was significant while in Proficiency of Indonesian language was not significant.
Keyword: Academic Adaptation, Cultural Barriers, Language Barriers, Sociocultural Adaptation

Judul: Faktor-faktor yang mempengaruhi efektivitas komunikasi di dalam sekolah lapang padi
Abstrak: A study was carried out to analyze the relationships among influencing factors to communication effectiveness in socialization of technological innovation in conducting the program of Field School of Integrated Crop Management of Rice, in Cikarawang Village, Bogor Barat Sub-district, Bogor City. Data were collected using questionnaire method, and then analyzed using τ - Kendal descriptive method. The results of the study showed that the factor of field guide characteristic had a significant correlation with the communication participation of farmer. The field guide characteristics also had a significant correlation with the technological innovation characteristic (i.e. trialibility and observability). Some elements of farmer characteristics (i.e. age and experience) significantly correlated with the communication participation of farmer. However, all elements of communication channels (type of media and place and time suitability) were not correlated with the communication participation of farmer. This could be due to the absence of other type of media, other than the direct communication (meeting, discussion and field practice). Farmer participation to the main activities of the field school program (PRA, meeting, discussion and field practice) significantly correlated with the knowledge enhancement (cognitive) and with the attitude change tendency (affective) of program-involved farmers. However, the communication participation of farmer was not correlated with the action of program-involved farmers to apply technological innovation of the field school. In other words, although program-involved farmers had obtained enough knowledge and had tendency to choose technological components in the field school program, but in general they had not yet applied optimally the components.
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular