Minimizing harmonic distortion impact cause by CS using meta heuristic technique

Non-linear load in the distribution system has caused negative impact to its power quality especially on harmonic distortion. Charging Station (CS) is a non-linear load that widely promoted with the aim to support the continuous usage of Electric Vehicle (EV). This research is focusing on optimal placement and sizing of multiple passive filter to mitigate harmonic distortion due to CS usage at distribution system. There are 6 units of CS which being placed in low voltage buses which indirectly will inject harmonic to the system during charging. Power system harmonic flow, passive filter, CS, battery and the analysis will be model in MATLAB. Multi-objective function which are weight summation approach (WSA) and Pareto Front are used to assist meta heuristic technique which is Modified Lightning Search Algorithm (MLSA) to identify optimum location and sizing of passive filter based on improvement on propose five parameters. From the result, the optimal placements and sizing of passive filter able to reduce the maximum Total Harmonic Distortion (THD) for voltage, current and apparent losses respectively. Therefore, the propose method is suitable to reduce harmonic distortion as well as apparent losses at distribution system with present of CS

Peningkatan Immunemodulator Melalui Penambahan Pondguard untuk Pakan dan Media Air pada Pembesaran Udang Vaname

Pondguard  adalah immunemodulator yang berfungsi menjaga sistem imun udang agar tetap berfungsi normal. Apabila tingkat imunitas rendah maka akan ditingkatkan dan akan menekan reaksi sistem imun bila berlebihan. Tujuan dari penelitian ini adalah untuk mengevaluasi tingkat efisiensi penggunaan pondguard  terhadap peningkatan produksi udang vaname secara intensif, dalam menjaga imunitas udang, fungsi metabolisme dasar tubuh udang, mengorganisir elemen-elemen dan mineral yang ada di dalam air dan meningkatkannya sampai tahap eksponensial, mengurangi tingkat stress udang, mengurangi load pathogen berbahaya (virus dan bakteri) di dalam lingkungan kolam. Metode yang digunakan adalah menambahkan pondguard  pada pakan dengan dosis 2 ml dan pada media air 0,1-0,2 ppm yang dilakukan pada 2 unit tambak. Hasil analisis menunjukkan bahwa tambak yang menggunakan pondguard  memiliki size 25,4 dan FCR 1,38 sedangkan yang tidak menggunakan aplikasi pondguard  memiliki size 27,2 dan FCR 1,36 selama umur pemeliharaan 139 hari. Dengan menggunakan pondguard, dapat menargetkan ADG (Average Daily Growth) yang lebih tinggi dengan memaksimalkan pakan yang diberikan sehingga udang yang didapat memiliki size yang lebih besar dan kualitas air tetap terjaga

Potential implications of coronary artery calcium testing for guiding aspirin use among asymptomatic individuals with diabetes.

ObjectiveIt is unclear whether coronary artery calcium (CAC) is effective for risk stratifying patients with diabetes in whom treatment decisions are uncertain.Research design and methodsOf 44,052 asymptomatic individuals referred for CAC testing, we studied 2,384 individuals with diabetes. Subjects were followed for a mean of 5.6 ± 2.6 years for the end point of all-cause mortality.ResultsThere were 162 deaths (6.8%) in the population. CAC was a strong predictor of mortality across age-groups (age <50, 50-59, ≥60), sex, and risk factor burden (0 vs. ≥1 additional risk factor). In individuals without a clear indication for aspirin per current guidelines, CAC stratified risk, identifying patients above and below the 10% risk threshold of presumed aspirin benefit.ConclusionsCAC can help risk stratify individuals with diabetes and may aid in selection of patients who may benefit from therapies such as low-dose aspirin for primary prevention

Hydration and water holding properties of cross-linked lignite humic acids

Lignite and lignite humic acids, which are used as soil amendments sometimes, are supposed to improve soil properties such as water holding capacity. The structure of those materials is composed of various organic molecules stabilized mostly byweak interactions. Therefore, excess ofwater causes only partial swelling, but most of the physical structure is destabilized. This accelerates the desiccation and hampers their application as natural hydrogel-like substances. In order to stabilize the structure of lignite humic acids and improve the water holding capacity, we applied formaldehyde cross-linking procedure based on covalent coupling of aromatic humic acids moieties. By combining the 1H NMR relaxometry and methods of thermal analysis, the kinetics and degree of hydration, water distribution and moisture uptake were investigated. It was found that cross-linking induced a reduction in moisture sorption capacity at lowrelative humidity and an increase at higher relative humidity,which was attributed to the separation of functional groups and decreasing of structural compactness after crosslinking. As a result, the cross-linked humic acids, exhibited faster water uptake and approximately three-fold higher water holding capacity in comparison with the parental sample. The distribution of relaxation times of water protons in swollen humic acids revealed the unification of pore size distribution upon cross-linking. Although the improved hydration of cross-linked lignite humic acids already resembles the hydration of some hydrophilic polymers, the water holding capacity is still belowthe capacity of classical hydrogels. Nevertheless, the lowprice of lignite, sorption properties and its overall positive affect on soil quality and productivity give a promise in application of this material both in agriculture and remediation technologies

Cyclisation of Cell Penetrating PDZ-Binding Peptides Directed to PSD95

Excitatory glutamatergic neurotransmission via N-methyl-D-aspartate receptor (NMDAR) is critical for synaptic plasticity and survival of neurons. Excessive NMDAR activity, however can cause excitotoxicity and promote cell death, underlying a potential mechanism of neurodegeneration occurring in Alzheimer’s disease (AD). The regulation of calcium levels at synapses is important for pre- and post-synaptic activation in the hippocampus, where glutamate is the primary neurotransmitter, acting via metabotropic and ionotropic receptors

A Reference Section Through Fast-Spread Lower Oceanic Crust, Wadi Gideah, Samail Ophiolite (Sultanate of Oman): Petrography and Petrology

In the absence of a complete profile through fast-spreading modern oceanic crust, we established a reference profile through the whole paleo crust of the Samail ophiolite (Sultanate of Oman), which is regarded as the best analogue for fast-spreading oceanic crust on land. To establish a coherent data set, we sampled the Wadi Gideah in the Wadi-Tayin massif from the mantle section up to the sheeted dikes and performed different analytical and structural investigations on the same suite of samples. This paper reports our studies of the lower crust, a 5 km thick pile of gabbros, focusing on petrographic features and on the results of mineral analyses. Depth profiles of mineral compositions combined with petrological modeling reveal insights into the mode of magmatic formation of fast-spreading lower oceanic crust, implying a hybrid accretion mechanism. The lower two thirds of the crust, mainly consisting of layered gabbros, formed via the injection of melt sills and in situ crystallization. Here, upward moving fractionated melts mixed with more primitive melts through melt replenishments, resulting in a slight but distinct upward differentiation trend. The upper third of the gabbroic crust is significantly more differentiated, in accord with a model of downward differentiation of a primitive parental melt originated from the axial melt lens located at the top of the gabbroic crust. Our hybrid model for crustal accretion requires a system to cool the deep crust, which was established by hydrothermal fault zones, initially formed on-axis at very high temperatures