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Author(s):  
Isradias Mirajhusnita ◽  
Ros Ayu Nisya’ul Fitri ◽  
Muhammad Yusuf ◽  
Muhamad Yunus

Tegal city station which is in the center of Tegal city. Activities in and out of station visitors lead to a density of road capacity. As well as the smoothness of traffic also depends on the condition of the road pavement. This study aims to determine the level of road service and evaluation of road pavement thickness as well as to provide alternative ways of handling road problems on Jalan Semeru, Jalan Pancasila and Jalan Kolonel Sudiarto which are influenced by road users around the Kota Tegal station. The benefits of the research provide material for consideration of regional structuring policies and input data on road improvement planning for related agencies. The research method is qualitative, namely analyzing the level of road service with LOS calculations according to the 1997 Indonesian Road Capacity Manual and evaluating pavement thickness with CESA calculations according to the 2013 Road Pavement Design Manual. Data analysis was obtained from field measurements and traffic volume calculations. The results of the calculation of the analysis of the level of road service on Jalan Semeru, Jalan Pancasila and Jalan Kolonel Sudiarto are at service level C, namely stable current conditions with an average speed of 30 km / h due to side obstacles so that the driver has limitations in choosing speed, it is recommended to add and traffic sign confirmation. Evaluation of the structure of the pavement layer on Jalan Pancasila is adequate for the next 20 years of planning life. Meanwhile, Jalan Semeru with a length of 610 meters and a width of 550 meters as well as Jalan Kolonel Sudiarto with a length of 845 meters and a width of 700 meters need to be thickened with a layer of wear layer (AC-WC) with a thickness of 4 cm at a cost of Rp. 1,256,137,000.


2021 ◽  
Author(s):  
Aidi Ren ◽  
Zhanhao Zhang ◽  
Haoran Yu ◽  
Hong-Wei Yu
Keyword(s):  

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1036
Author(s):  
Adeela Hanif ◽  
Gargi Ghosh ◽  
Montri Meeseepong ◽  
Hamna Haq Chouhdry ◽  
Atanu Bag ◽  
...  

Biodegradable stretchable electronics have demonstrated great potential for future applications in stretchable electronics and can be resorbed, dissolved, and disintegrated in the environment. Most biodegradable electronic devices have used flexible biodegradable materials, which have limited conformality in wearable and implantable devices. Here, we report a biodegradable, biocompatible, and stretchable composite microfiber of poly(glycerol sebacate) (PGS) and polyvinyl alcohol (PVA) for transient stretchable device applications. Compositing high-strength PVA with stretchable and biodegradable PGS with poor processability, formability, and mechanical strength overcomes the limits of pure PGS. As an application, the stretchable microfiber-based strain sensor developed by the incorporation of Au nanoparticles (AuNPs) into a composite microfiber showed stable current response under cyclic and dynamic stretching at 30% strain. The sensor also showed the ability to monitor the strain produced by tapping, bending, and stretching of the finger, knee, and esophagus. The biodegradable and stretchable composite materials of PGS with additive PVA have great potential for use in transient and environmentally friendly stretchable electronics with reduced environmental footprint.


Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1488
Author(s):  
Kyeong-Ho Seo ◽  
Jaewon Jang ◽  
In Man Kang ◽  
Jin-Hyuk Bae

In this study, we improved the photosensitivity of the lead sulfide quantum dot (PbS QD)-based shortwave infrared (SWIR: 1.0–2.5 μm) photodetector by blending poly(3-hexylthiophene-2,5-diyl) (P3HT) with PbS QD. The PbS QD used for SWIR photoactive layer showed an absorption peak at 1410 nm. In addition, by using zinc oxide nanoparticles (ZnO NPs) as an interlayer, we obtained the stable current characteristics of our device. To confirm the effectiveness of P3HT on the PbS QD-based SWIR photodetector, we compared the electrical characteristics of a PbS QD-based device with a hybrid P3HT:PbS QD-based device. In the reverse bias region, the current on/off ratio of the PbS QD-based device was 1.3, whereas the on/off ratio of the hybrid P3HT:PbS QD-based device was 2.9; 2.2 times higher than the PbS QD-based device. At −1 V, the on/off ratio of the PbS QD-based device was 1.3 and the on/off ratio of the hybrid P3HT:PbS QD-based device was 3.4; 2.6 times higher than the PbS QD-based device. The fabricated P3HT:PbS QD-based device had the highest on/off ratio when −1 V voltage was applied.


2020 ◽  
Vol 86 (5) ◽  
Author(s):  
R. Sweeney ◽  
A. J. Creely ◽  
J. Doody ◽  
T. Fülöp ◽  
D. T. Garnier ◽  
...  

SPARC is being designed to operate with a normalized beta of $\beta _N=1.0$ , a normalized density of $n_G=0.37$ and a safety factor of $q_{95}\approx 3.4$ , providing a comfortable margin to their respective disruption limits. Further, a low beta poloidal $\beta _p=0.19$ at the safety factor $q=2$ surface reduces the drive for neoclassical tearing modes, which together with a frozen-in classically stable current profile might allow access to a robustly tearing-free operating space. Although the inherent stability is expected to reduce the frequency of disruptions, the disruption loading is comparable to and in some cases higher than that of ITER. The machine is being designed to withstand the predicted unmitigated axisymmetric halo current forces up to 50 MN and similarly large loads from eddy currents forced to flow poloidally in the vacuum vessel. Runaway electron (RE) simulations using GO+CODE show high flattop-to-RE current conversions in the absence of seed losses, although NIMROD modelling predicts losses of ${\sim }80$  %; self-consistent modelling is ongoing. A passive RE mitigation coil designed to drive stochastic RE losses is being considered and COMSOL modelling predicts peak normalized fields at the plasma of order $10^{-2}$ that rises linearly with a change in the plasma current. Massive material injection is planned to reduce the disruption loading. A data-driven approach to predict an oncoming disruption and trigger mitigation is discussed.


Author(s):  
Ю.А. НИКИТИН ◽  
А.Д. СЕДИНИН ◽  
В.А. ЮРОВА

В устройствах радиосвязи и электроники усилители во многом определяют динамический диапазон и чувствительность аппаратуры. Возможно построение усилительных структур на управляемых токовых зеркалах. В работе рассмотрены варианты построения квазилинейных усилительных структур на токовых зеркалах. С помощью пакета MicroCap 11 проведено их моделирование и сравнение. In radio communication and electronics devices, amplifiers largely determine the dynamic range and sensitivity of the equipment. It is possible to build amplifying structures using controlled current mirrors (CM). The paper considers variants of construction of broadband quasi-linear amplifying structures on CM. Their comparative modeling was carried out with the help of the computer package Micro Cap 11.


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