Piezoelectric Configuration for Generating Electricity Using Waves Power

This study is aimed at determining the piezoelectric configuration for generating electricity from wave power through the design of a prototype model named Cov-TOTal. The study was carried out in Tomini Bay, Lopo Village, Batudaa Pantai District, Gorontalo Regency, located at approximately ±50 meters from the shoreline, while the piezoelectric construction was arranged in parallel with varying numbers of 28, 70, and 90 pieces. The result showed that the amount of piezoelectric configuration affects the value of the voltage and electric current generated by the Cov-TOTal model. Furthermore, the average electric voltage values were 17.58, 20.76, and 29.85 volts, while the average current was 1.16, 1.73, and 2.01 mA for each piezoelectric amount. Therefore, the largest values of power and electrical energy for each piezoelectric are 16.65 mW and 0.56 joules, 31.82 mW and 1.20 joules, and 44.59 mW and 1.77 joules, respectively. This study concluded that the amount of piezoelectric configuration has a significant effect on the voltage, current, power, and electrical energy produced.

Towards a Better Understanding of PTSD/Hypertension Associations: Examining Sociodemographic Aspects

The present study is an examination of sociodemographic and environmental correlates of hypertension and post-traumatic stress disorder (PTSD), with the goal of better understanding previously identified PTSD and hypertension associations. Data from 5877 adults up to age 54 were analyzed to examine racial and ethnic differences in hypertension, and relationships of socioeconomic status (SES; total family income), employment status, and marital status, and urbanicity (urban, suburban, or rural habitation) with hypertension and PTSD. Next, a total model was tested to determine which sociodemographic and environmental variables, and/or PTSD were significant independent correlates of hypertension. Higher rates of hypertension were evident among African Americans (13.8%), relative to Caucasian (7.7%) or Hispanic (6.7%) participants (p < 0.001). Low SES (family income under USD 19,000) and unemployment were associated with significantly greater likelihood (p < 0.001) of hypertension (9.8% vs. 7.6% for low SES; 14.3% vs. 8.3% for unemployment) and PTSD (16.6% vs. 8.7% for low SES; 21.3% vs. 9.6% for unemployment). Participants who were married versus those separated or divorced were significantly less likely (p < 0.001) to have hypertension (9.0% vs. 11.9%) or PTSD (10.8% vs. 18.3%). Urbanicity was not significantly associated with hypertension or PTSD. Unemployment and PTSD were the only significant independent factors associated with hypertension.

A possible nonthermal X-ray emission from γ Cas analogues stars

We analyze the archival XMM-Newton X-ray observations of 15 γ Cas analogue stars and two candidates for such objects. The EPIC spectra of the considered stars in the range of 0.2-8 keV were extracted and fitted by different models. Our estimates show that assuming the X-ray emission from γ Cas analogues to be totally thermal, their model plasma temperatures can reach anomalously high values. However including an additional power components to the model spectra leads to significant decreasing of the plasma temperatures. The spectral index of the power component is about 1.5, and the fraction of this in the total model flux is rather large (50-90%). Moreover, it decreases with expanding temperature of the X-ray emitting plasma as compared to typical OB stars. We conclude that γ Cas analogues can produce nonthermal X-ray emission within the framework of the Chen & White (1991) model, while if the nonthermal X-rays from typical OB stars exists, they should be generated by different processes.

Influence of Basic Psychological Needs over Burnout in the Sport Context

The aim of this study was to investigate the relationship among basic psychological needs and burnout in a sample of athletes (N = 639). It was hypothesized that psychological needs satisfaction was negatively associated with burnout syndrome and the frustration of these needs related positively. Burnout was measured with the Athlete Burnout Questionnaire (ABQ), satisfaction of basic psychological needs with the Basic Needs Satisfaction in Sport Scale (BNSSS), and frustration with the Psychological Needs Thwarting Scale (PNTS). Data analysis was conducted under the approach of structural equation modeling (SEM). The results showed that satisfaction of basic psychological needs had a negative direct effect on burnout of −0.67 (p < 0.001) while the frustration of these needs had a direct effect of 0.18 (p < 0.001). In addition, the total model explained 59% of the total variance of burnout. All individual parameters of the model were statistically significant and the overall fit of the model was satisfactory. It can be concluded that satisfying the basic psychological needs of the athletes can protect them against burnout.

Table of Integration Model for Motor Vehicle Sharia Insurance

Motor vehicle insurance is one of the general insurance types that provide coverage for loss, damages, and disappearance of a motor vehicle due to risks experienced by the covered object. The product illustration of motor vehicle insurance is generally presented in a condensed form, containing few pages and limited information. Based on a product illustration of motor vehicle sharia insurance issued by PT. Asuransi Tri Pakarta (TRIPA) treated as a case study, an alternative version of product illustration in form of a table of integration model was designed to not only provided general information but also vehicle prices, values of premiums, tabarru, ujrah, investment, insurance costs, and surplus (if any). The partitions also performed on the additional protection offered by TRIPA so that the benefits that would be received by the insured would be greater. The generated table of integration model presents richer information regarding the insurance products, better scheme, and transparency in the management of total premiums.Keywords: general insurance; product illustration; management of total premiums; integration model; benefits. AbstrakAsuransi kendaraan bermotor merupakan salah satu jenis asuransi umum yang memberikan jaminan terhadap kerugian, kerusakan dan kehilangan kendaraan bermotor akibat terjadinya risiko yang menimpa obyek pertanggungan. Umumnya ilustrasi produk asuransi kendaraan bermotor disajikan dalam bentuk ringkasan yang beragam dalam beberapa halaman dan hanya menjelaskan informasi secara umum saja. Mengambil studi kasus berupa ilustrasi produk asuransi syariah kendaraan bermotor dari PT. Asuransi Tri Pakarta (TRIPA), dirancang bentuk alternatif penyajian berupa tabel model integrasi yang memberikan informasi tidak hanya harga kendaraan dan besaran premi, tetapi juga informasi tentang tabarru, ujrah, investasi, biaya asuransi, surplus (jika ada). Selanjutnya, dilakukan partisi terhadap perlindungan tambahan sehingga manfaat yang diperoleh tertanggung lebih luas. Melalui tabel model integrasi ini, informasi yang tertulis tentang produk asuransi lebih lengkap dan skema pengelolaan premi total asuransi syariah kendaraan bermotor juga lebih jelas.Kata Kunci: asuransi umum; ilustrasi produk; pengelolaan premi total; model integrase; manfaat.

PEMODELAN MEKANISME UMPAN BALIK REAKTIVITAS PADA SIMULATOR REAKTOR KARTINI

PEMODELAN MEKANISME UMPAN BALIK REAKTIVITAS PADA SIMULATOR REAKTOR KARTINI. Pengendalian reaktor dilakukan dengan beberapa tahapan seperti mengubah jumlah atau posisi bahan bakar, mengubah moderator atau reflektor serta menambah atau mengurangi bahan penyerap neutron di dalam teras reaktor. Ketiga tahapan tersebut mempengaruhi daya reaktor melalui perubahan nilai reaktivitas yang dikenal sebagai efek umpan balik reaktivitas. Untuk mengetahui efek umpan balik reaktivitas terhadap daya reaktor maka dilakukan Pemodelan Mekanisme Umpan Balik Reaktivitas pada Simulator Reaktor Kartini berbasis LabVIEW. Nilai reaktivitas bahan bakar dan pendingin didapatkan dari data operasi reaktor Kartini mengenai suhu bahan bakar dan pendingin terhadap daya reaktor. Nilai reaktivitas bahan penyerap neutron didapatkan melalui konversi posisi batang kendali penyerap neutron menjadi reaktivitas dengan memanfaatkan data kalibrasi terakhir batang kendali reaktor Kartini. Ketiga nilai reaktivitas tersebut dijumlahkan dan dihitung dalam persamaan kinetika reaktor titik, dan dikonversi menjadi besaran daya reaktor. Efek umpan balik akan mengubah parameter dalam persamaan kinetika, terutama pada nilai reaktivitas total. Model umpan balik reaktivitas telah berhasil dibuat dan menghasilkan daya konstan. Model umpan balik reaktivitas sudah dimasukkan dalam simulator reaktor Kartini. Namun demikian hasil perhitungan daya belum divalidasi dengan daya reaktor Kartini. Kata kunci: umpan balik reaktivitas, simulator reaktor Kartini, pemodelan reaktor titik

Studi Perilaku Balok Beton Bertulang Dengan Variasi Letak Bukaan Menggunakan Metode Elemen Hingga

Jaringan utilitas pada konstruksi gedung bertingkat yaitu seperti saluran kabel listrik, perpipaan, kabel telepon, pendingin ruangan dan lain-lain, biasanya ditempatkan pada ruang dibagian atas plafon atau dipasang menempel pada balok. Dengan meletakkan utilitas pada balok dapat meminimalisasi tinggi atau space dari ruang, juga akan mereduksi volume beton yang digunakan serta lebih rapi. Maka akan memungkinkan untuk mendesain bukaan pada balok beton bertulang, dimana selain berfungsi sebagai struktur yang menahan dan menyalurkan beban-beban yang bekerja di atasnya, tapi juga berfungsi sebagai pendukung utilitas. Pelaksanaan penelitian ini di program Finite Elemen Method dikondisikan sama dengan keadaan di lapangan. Dalam penelitian dibuat 3 (tiga) variasi letak bukaan , sehingga total model menjadi 3 buah. Dimensi lubang yang digunakan yaitu luas lubang 270 cm2 atau ukuran perseginya yaitu 16,43 x 16,43 cm2. Variasi letak bukaan pada balok mempengaruhi kemampuan balok menahan beban. Semakin banyak jumlah lubang semakin kecil kemampuan balok menahan beban dan letak bukaan pada daerah lapangan lebih baik dalam menahan beban daripada didaerah tumpuan. Hal ini terlihat dari perilaku deformasi yang terjadi sebelum keruntuhan terjadi. Retak yang terjadi pada semua model kebanyakan adalah retak vertikal, hal ini mengindikasikan bahwa sangat diperlukan penambahan tulangan tarik untuk mencegah lebih awal keruntuhan lentur beton yang bersifat getas.Kata kunci : balok, beton, bukaan, finite elemen method

Autophagy dark genes: Can we find them with machine learning?

Identifying novel genes associated with autophagy (ATG) in man remains an important task for gaining complete understanding on this fundamental physiological process. A machine-learning guided approach can highlight potentially “missing pieces” linking core autophagy genes with understudied, “dark” genes that can help us gain deeper insight into these processes. In this study, we used a set of 103 (out of 288 genes from the Autophagy Database, ATGdb), based on the presence of ATG-associated terms annotated from 3 secondary sources: GO (gene ontology), KEGG pathway and UniProt keywords, respectively. We regarded these as additional confirmation for their importance in ATG. As negative labels, we used the OMIM list of genes associated with monogenic diseases (after excluding the 288 ATG-associated genes). Data associated with these genes from 17 different public sources were compiled and used to derive a Meta Path/XGBoost (MPxgb) machine learning model trained to distinguish ATG and non-ATG genes (10-fold cross-validated, 100-times randomized models, median AUC = 0.994 +/− 0.0084). Sixteen ATG-relevant variables explain 64% of the total model gain, and 23% of the top 251 predicted genes are annotated in ATGdb. Another 15 genes have potential ATG associations, whereas 193 do not. We suggest that some of these 193 genes may represent “autophagy dark genes”, and argue that machine learning can be used to guide autophagy research in order to gain a more complete functional and pathway annotation of this complex process.

PENGARUH VARIASI LUBANG TERHADAP TEGANGAN DAN REGANGAN PADA BALOK BETON BERTULANG

Pada struktur bangunan beton bertulang bertingkat membutuhkan jaringan utilitas seperti saluran kabel listrik, kabel telepon, pendingin ruangan, perpipaan, dan sebagainya. Penempatan jaringan biasanya ditempelkan pada balok atau diletakkan bagian atas plafon. Hal tersebut dapat mengurangi tinggi rencana awal bangunan dan dari segi estetika terlihat tidak rapi, sehingga dibuatlah alternatif desain dengan memanfaatkan ruang pada balok struktur. Ada kemungkinan untuk mendesain sejumlah lubang pada balok beton bertulang. Sehingga balok yang berfungsi sebagai struktur yang menahan dan menyalurkan beban-beban yang bekerja di atasnya, dapat juga berfungsi sebagai pendukung utilitas. Model Balok yang dibuat di program ansys dikondisikan sama dengan keadaan dilapangan. Dalam penelitian ini dibuatlah beberapa model balok bertulang dengan 3 (tiga) variasi banyaknya lubang dan variasi posisi lubang serta variasi penambahan tulangan geser, sehingga total model menjadi 7 (Tujuh) buah. Ukuran luasan lubang berbentuk persegi yang digunakan yaitu 270 cm2 atau ukuran panjang dan lebarnya yaitu 16,43 x 16,43 cm2. Semakin sedikit jumlah lubang semakin optimal balok menahan beban yang lebih besar Hal ini ditunjukkan dengan besarnya tegangan dan regangan yang terjadi sebelum keruntuhan terjadi. Penempatan lubang pada daerah lapangan lebih baik daripada didaerah tumpuan, balok dengan lubang didaerah tumpuan memiliki rasio tegangan 0,9742 lebih kecil daripada lubang dilapangan. Penambahan perkuatan geser dapat menambah besarnya tegangan pada balok sekitar 1,0842 kali dari pada balok dengan penulangan biasa. On-floor reinforced concrete building structures in need of network utilities such as electrical cable, telephone cable, air conditioning, piping, etc. The placement of the network are usually affixed to beams or put the top of the ceiling. It can reduce the height of the original plans of the building and in terms of aesthetics look untidy, so an alternative design was made by making use of spaces on the block structure. It is possible to design a number of holes in reinforced concrete beams. So the beam that serves as a structure that holds and distributes loads that work on it, it can also serve as support utilities. Model Beam made in program ansys conditioned equals the State of the field. In this study made several models of beams reinforced with 3 (three) variation of the number of holes and hole position variation and variation of shear reinforcement addition, bringing the total model into seven pieces. The size of the area of the square-shaped hole used i.e. 270 cm2 or length and width i.e. 16.43 x 16.43 cm2. The fewer the number of holes the more optimal beams hold the greater burden of this is shown by the magnitude of the voltage and the strain that occurs before the collapse occurred. The placement of the holes on the field better than a large object, beams with holes in the pedestal voltage 0.9742 ratio smaller than hole field. The addition of shear reinforcement purposes can increase the magnitude of the voltage on the block about 1.0842 times from on the block with reinforcement.