Short-Term Precipitation Forecast Based on the PERSIANN System and LSTM Recurrent Neural Networks

Short-term Quantitative Precipitation Forecasting is important for flood forecasting, early flood warning, and natural hazard management. This study proposes a precipitation forecast model by extrapolating Cloud-Top Brightness Temperature (CTBT) using advanced Deep Neural Networks, and applying the forecasted CTBT into an effective rainfall retrieval algorithm to obtain the Short-term Quantitative Precipitation Forecasting (0–6 hr). To achieve such tasks, we propose a Long Short-Term Memory (LSTM) and the Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks (PERSIANN), respectively. The precipitation forecasts obtained from our proposed framework, (i.e., LSTM combined with PERSIANN) are compared with a Recurrent Neural Network (RNN), Persistency method, and Farneback optical flow each combined with PERSIANN algorithm and the numerical model results from the first version of Rapid Refresh (RAPv1.0) over three regions in the United States, including the states of Oregon, Oklahoma, and Florida. Our experiments indicate better statistics, such as correlation coefficient and root-mean-square error, for the CTBT forecasts from the proposed LSTM compared to the RNN, Persistency, and the Farneback method. The precipitation forecasts from the proposed LSTM and PERSIANN framework has demonstrated better statistics compared to the RAPv1.0 numerical forecasts and PERSIANN estimations from RNN, Persistency, and Farneback projections in terms of Probability of Detection, False Alarm Ratio, Critical Success Index, correlation coefficient, and root-mean-square error, especially in predicting the convective rainfalls. The proposed method shows superior capabilities in short-term forecasting over compared methods, and has the potential to be implemented globally as an alternative short-term forecast product

Pola Komunikasi Pencari Suaka Asal Afghanistan dalam Berinteraksi di Rumah Detensi Imigrasi Pekanbaru

The movement of people from one place to another is a common thing in todays times. Technology support and access to adequate transportation as well as the interests of the individual is the reason for the transfer to happen. Turbulent political conditions and trigger wars in some countries is one of the reasons for the immigration of people for seek asylum. Pekanbaru city is one of the cities that is much visited by immigrants with a reason to seeking asylum. Until September 2015 there were 300 people from different countries who inhabit the immigration detention center and of the number of 300 asylum seekers from Afghanistan were the most with 217 asylum seekers. they have to make any interactions with the other asylum seekers or the immigrants officers. The goal of this research is to analyze the communication patterns and to identify the verbal and nonverbal communication of the Afghanistan asylum seekers in the Immigration Detention Of Pekanbaru.This research used descriptive qualitative research metode, with the selection of informants using purposive sampling technique, which selects three informants, which is a KASUBSI Security of Immigration Detention Pekanbaru, and two Afghanistan asylum seekers. The data collection techniques are used observation, in-depth interviews, and documentation.While,for the data analysis was refer to the interactive model of Huberman and Miles. Then, for checking the validity of data were using extension participation and triangulation techniques.The results of this research are showed that the communication patterns of the Afghanistan asylum seekers are divided into two; the first one is internalcommunication pattern which uses all channels outline. In this pattern, they can make any interaction and it will influence each other. And then In this pattern of communication with external groups, the leader will come out of the loop all channels outline and served as a translator for the group members and external groups. In daily interaction, they use verbal communication in Parcy language or English with nonverbal communication such as facial, gestural, and postural message.Keyword: Communication pettern, Afghanistan Seekers Asylum, Immigration Detention of Pekanbar

Propagation of Light in Photonic Crystal Fibre Devices

We describe a semi-analytical approach for three-dimensional analysis of photonic crystal fibre devices. The approach relies on modal transmission-line theory. We offer two examples illustrating the utilization of this approach in photonic crystal fibres: the verification of the coupling action in a photonic crystal fibre coupler and the modal reflectivity in a photonic crystal fibre distributed Bragg reflector.Comment: 15 pages including 7 figures. Accepted for J. Opt. A: Pure Appl. Op

Kepadatan Jentik Aedes SP pada Kontainer di dalam dan di Luar Rumah di Kelurahan Surgi Mufti Banjarmasin Tahun 2014

Demam berdarah dengue (DBD) merupakan salah satu penyakit yang masih menjadi masalah kesehatan masyarakat di Indonesia. Penyakit DBD disebabkan oleh virus dengue dan ditularkan oleh nyamuk Aedes sp. Keberadaan nyamuk sebagai vektor DBD menjadi sangat penting. Penelitian ini bertujuan untuk mengetahui gambaran kepadatan jentik Aedes sp baik yang ditemukan di dalam maupun di luar rumah serta mengidentifikasi tindakan masyarakat dalam menerapkan 3M Plus di KelurahanSurgi Mufti Banjarmasin tahun 2014. Jenis penelitian ini bersifat deskriptif. Populasi yang dalam penelitian ini adalah seluruh rumah dengan jumlah 4326 buah rumah pada 36 RT didapatkan sampel sebanyak 100 buah rumah. Pengambilan sampel ini menggunakan metode random sampling. Kegiatan yang dilakukan berupa survei jentik dan wawancara terpimpin kepada kepala rumah tangga. Hasil penelitian menunjukkan bahwa dari 100 rumah yang disurvei terdapat kontainer yang positif berperan sebagai tempat perindukkan nyamuk sebanyak 49 (17,44%) kontainer dari 281 buah yang diperiksa yang terdiri dari 38 buah (38,00%) kontainer berada di dalam rumah dan 11 buah (11,00%) berada di luar rumah. Jenis kontainer di dalam rumah yang positif jentik Aedes sp terbanyak ditemukan pada bak mandi (60,63%), kontainer di luar rumah terbanyak ditemukan positif jentik Aedes sp adalah pada drum (54,55%). Kepadatan jentik Aedes sp di Kelurahan Surgi Mufti mempunyai nilai HI (33%), CI (19,93%), BI (49%), dan DF memperoleh nilai 5, maka dikategorikan sebagai daerah yang tingkat penularannya tergolong sedang. Untuk tindakan masyarakat dalam menerapkan 3M Plus (8%) responden kategori baik, (73%) sedang, dan (19%) kurang. Oleh karena itu yang harus dilakukan agar mengurangi populasi jentik adalah menerapkan 3M Plus secara rutin bagi warga masyarakat Surgi Mufti, dan penyuluhan untuk menginformasikan dan mengingatkan cara pencegahan dan penanggulangan penyakit DBD secara rutin

Tropical Dominating Sets in Vertex-Coloured Graphs

Given a vertex-coloured graph, a dominating set is said to be tropical if every colour of the graph appears at least once in the set. Here, we study minimum tropical dominating sets from structural and algorithmic points of view. First, we prove that the tropical dominating set problem is NP-complete even when restricted to a simple path. Then, we establish upper bounds related to various parameters of the graph such as minimum degree and number of edges. We also give upper bounds for random graphs. Last, we give approximability and inapproximability results for general and restricted classes of graphs, and establish a FPT algorithm for interval graphs.Comment: 19 pages, 4 figure

Single Impurity Problem in Iron-Pnictide Superconductors

Single impurity problem in iron-pnictide superconductors is investigated by solving Bogoliubov-de Gennes (BdG) equation in the five-orbital model, which enables us to distinguish s$_{+-}$ and s$_{++}$ superconducting states. We construct a five-orbital model suitable to BdG analysis. This model reproduces the results of random phase approximation in the uniform case. Using this model, we study the local density of states around a non-magnetic impurity and discuss the bound-state peak structure, which can be used for distinguishing s$_{+-}$ and s$_{++}$ states. A bound state with nearly zero-energy is found for the impurity potential $I\sim 1.0$ eV, while the bound state peaks stick to the gap edge in the unitary limit. Novel multiple peak structure originated from the multi-orbital nature of the iron pnictides is also found.Comment: 5 page