Optimal Cooperative Power Allocation for Energy Harvesting Enabled Relay Networks

In this paper, we present a new power allocation scheme for a decode-and-forward (DF) relaying-enhanced cooperative wireless system. While both source and relay nodes may have limited traditional brown power supply or fixed green energy storage, the hybrid source node can also draw power from the surrounding radio frequency (RF) signals. In particular, we assume a deterministic RF energy harvesting (EH) model under which the signals transmitted by the relay serve as the renewable energy source for the source node. The amount of harvested energy is known for a given transmission power of the forwarding signal and channel condition between the source and relay nodes. To maximize the overall throughput while meeting the constraints imposed by the non-sustainable energy sources and the renewable energy source, an optimization problem is formulated and solved. Based on different harvesting efficiency and channel condition, closed form solutions are derived to obtain the optimal source and relay power allocation jointly. It is shown that instead of demanding high on-grid power supply or high green energy availability, the system can achieve compatible or higher throughput by utilizing the harvested energy

USING KWL (KNOW-WANT TO KNOW-LEARNED) STRATEGY IN IMPROVING STUDENTS’ READING COMPREHENSION

This experimental study aimed to investigate the effects of the use of KWL (Know-Want to Know-Learned) strategy in teaching reading comprehension. The population of this study was 120 students, while the samples consisted of 60 English department students enrolled in the second semester. The sample was divided into two groups; the experimental group (EG) and the control group (CG). The sample was chosen through random sampling technique. The instruments used in collecting the data were test and questionnaire. The data were analyzed through non-parametric statistical in SPSS 20. The result of Wilcoxon test was 0.00 lower than 5%. The findings reveal that there was significant difference in reading comprehension achievement between EG and CG. The mean score of the post-test for the EG was 9.92, while the mean score for post-test of CG was 7.91. Hence, it can be concluded that the alternative hypothesis was accepted and the null hypothesis was rejected. Consequently, the use of KWL strategy has proven a significance improvement in the students’ reading comprehension. Some implications are derived for both students and teachers

TRANSFORMASI POLA PENGASUHAN ANAK PADA KELUARGA ETNIS MAKASSAR DI PERKOTAAN (Studi Kasus Pada Keluarga Etnis Makassar Di Kota Makassar Provinsi Sulawesi Selatan)

The essence of this study aims to identify and analyze parenting patterns in Makassar culture in Makassar City about the views of Makassar ethnic parents in parenting children in urban areas. The method used in this research is qualitative with a case study approach. The data collection techniques in this study were (1) non-participant observation, then the aspects observed in this study included places, actors, and activities, (2) in-depth interviews. The results show that parenting patterns for children in Makassar ethnic families, especially in Makassar City, have now undergone changes or shifts and even adaptation of values to new values in both form and nature. Some of the factors that cause this to happen are (1) factors of change and shifting times with the previous generation, (2) individual psychological factors of children, and (3) factors of binding legislation relating to children

RF Energy Harvesting Enabled Power Sharing in Relay Networks

Through simultaneous energy and information transfer, radio frequency (RF) energy harvesting (EH) reduces the energy consumption of the wireless networks. It also provides a new approach for the wireless devices to share each other's energy storage, without relying on the power grid or traffic offloading. In this paper, we study RF energy harvesting enabled power balancing within the decode-and-forward (DF) relaying-enhanced cooperative wireless system. An optimal power allocation policy is proposed for the scenario where both source and relay nodes can draw power from the radio frequency signals transmitted by each other. To maximize the overall throughput while meeting the energy constraints imposed by the RF sources, an optimization problem is formulated and solved. Based on different harvesting efficiency and channel condition, closed form solutions for optimal joint source and relay power allocation are derived.Comment: An abbreviated version will be presented at IEEE online GreenComm, Nov., 201