The encounter of regulations originating from the state with the culture of indigenous peoples has given birth to a new socio-cultural order. Like what happened in Pulo Village, during the election process for the village head, there was a negotiation process between state regulations and customary norms. For this reason, using an ethnographic approach, this study seeks to uncover how the role of clans in the election of village heads is related to the system of social stratification with relations between kin. The technique of selecting informants is determined purposively, with the data collection techniques used are observation and interviews. Data analysis includes data reduction processes, data descriptions and conclusions. The results showed that the social stratification of the Kayupulo people consisted of, Ondoafi, clan head Clans (upper class), Clan Members, and Migrant Communities. Then relations between clans are formed from economic activity and clan relations in exogamous marriages. The role of kin in the election of village heads is seen starting from the process of determining candidates for candidates through a process of customary consolidation that those who verify that they can nominate as village chiefs. Clans that were reclaimed as village leaders are carried out in turn from lines, Sibi, Yowe, Haay, and Soro for every one time tenure.

This study discusses khayi, which focuses on how khayi function and value as a women's boat in the culture of the Sentani people. This research is ethnography with a qualitative approach and descriptive data analysis. Data collection techniques used were observation, interviews, recording and recording and literature study. Informants were selected based on purposive sampling. Then the data analysis used includes the process of data reduction, data display and data interpretation. The results showed Function of khayi is highly related to its shape. Khayi shape is an adaptive function of social culture life for Sentani tribe, especially in Ayapo village. Their knowledge of raw material and putting root of tree as the prow is an adaptive reaction to culture society. Its long, big shape has significant function to support and espouse fully activities of Sentani women. Value of khayi is an appreciative representation of Sentani men to their women for their significant roles in social culture cycle and family income and society as well.