One-way System Research Articles

Kajian Rekayasa Lalu Lintas Simpang TNI AU Rembiga Akibat Rekayasa Sistem Satu Arah pada Jl. Dr. Wahidin

TNI AU Rembiga intersection is a three-way link between the central point of Mataram city, which is also connected to the Rembiga intersection and the Dakota intersection, Rembiga. Dr. Wahidin street is an economic pathway for education, offices, and trade. At certain times, the traffic flow is very congested because the road is also the direction to West Lombok district. Based on observations at the research location, it was found that the distance between the Rembiga intersection and the TNI AU intersection was 322.8 meters which caused the movement of traffic flow to be less than optimal between the intersection distances so that it would affect performance at TNI AU intersection. For this reason, the purpose of this study was to examine the performance of the unsignalized intersection at the TNI AU Rembiga intersection due to the continued flow from the Rembiga intersection which is a signalized intersection due to a one-way system engineering carried out on the Dr. Wahidin street and before the implementation of the one-way system on the Dr. Wahidin street. This research was conducted with reference to the MKJI 1997, in which researchers conducted field observations, then collected primary data and secondary data. There is traffic flow engineering on Dr. Wahidin street, by creating a one-way system, had an impact on changing the performance of the unsignalized intersection at the TNI AU intersection to a level of service F with obstructed flow conditions, low speed whereas, before the implementation of the one-way system the level of service was E with stable flow conditions, stalled vehicles.

Design of long-distance multichannel system based on passive optical fiber audio transmission system

To meet sound transmission requirements in complex work environments, this paper constructs a passive audio pickup sensor based on an extrinsic Fabry-Perot interferometer (EFPI) and develops a one-way four-channel passive audio parallel transmission system based on a passive bidirectional audio over fiber(PB-AOF) transmission system and wavelength division multiplexing technology. The system realizes optical fiber audio transmission over a distance of 20 km. The experimental results show that the signal-to-noise ratio (SNR) is greater than 64 dB, and the highest sensitivity of the four channels in the proposed system is 1.06 V/Pa. Thus, the proposed long-distance terminal passive audio communication network is ideally suited for applications in certain fields.

A Half-Cycle Negative-Stiffness Damping Model and Device Development

This paper proposes a novel damping model with negative stiffness known as the half-cycle negative-stiffness damping model. Analysis of a single degree of freedom (SDOF) system demonstrated that the half-cycle negative-stiffness damping model has negative stiffness and energy dissipation. The equivalent negative stiffness of the model was derived from the frequency response analysis of the system. An alternating transmission system and a one-way friction system were developed to assemble a half-cycle negative-stiffness damping device (HCNSDD), which can generate a half-cycle negative-stiffness damping model. A mechanical model was developed to represent the force-displacement relationship of the proposed HCNSDD. A HCNSDD specimen was manufactured and examined using experimental tests. The HCNSDD exhibits half-cycle negative-stiffness damping and stable mechanical properties, demonstrating the feasibility and effectiveness of the proposed HCNSDD. Finally, a finite element simulation approach for HCNSDD was presented, and the performance of seismic vibration control of HCNSDD was evaluated using a multidegree-of-freedom system.

ABRASIVE FLOW FINISHING OF FDM PRINTED EXTRUSION DIE INSERT PATTERN USING NOVEL AFM FIXTURE WITH MANDREL GUIDE

The staircase/stair-stepping effect causes wrapping, shrinkage, and surface roughness in additively manufactured (AM) parts. Consequently, abrasive flow finishing (AFF) or abrasive flow machining (AFM) may be employed to improve the AM part surface finish. This study developed an environmentally friendly AFM media using rice husk ash as base material, waste vegetable oil as a liquid synthesizer, and natural additives, i.e. glycerin. The new newly developed rice husk ash-based AFM media (HSAFM) characterization was done using Fourier Transform Infrared (FTIR) spectroscopic method and thermogravimetric analysis (TGA). AFM medium viscosity was optimized using a Taguchi design ([Formula: see text]). These FDM-printed extrusions die inserts were finished using optimized AFM media in a one-way AFM system. A new AFM fixture with a mandrel guide was developed to direct media flow inside the die cavity to ensure uniform finishing. Experimental research has been done on finishing the FDM-printed extrusion die insert pattern using the Box–Behnken Design (BBD)-based experimental design of the response surface methodology (RSM) technique. The surface roughness Ra [Formula: see text]28.16 [Formula: see text]m was improved by 96% with the following process parameters: media viscosity of 60 Pa/s, the layer thickness of 0.3, and 90 min of finishing time.

Daily Commuting and Parking Pattern under the Fully Station-Based One-Way Carsharing Vehicle Environment

This study is the first in the literature to investigate the joint equilibrium of departure time and parking location choices in the station-based one-way carsharing system. Time-varying road tolls are optimized to eliminate queueing deadweight loss, minimize schedule delay cost, and induce an economically efficient parking pattern. The round-trip commuting pattern under the fully privately owned vehicle environment was also studied, and the aggregate social cost of the two travel modes are compared with each other to verify the potential benefit gained from implementing the one-way carsharing service. We then investigated demand elasticity with respect to the user’s daily travel cost in a one-way carsharing-only system, and an externality-based charging mechanism is proposed to achieve the optimal demand-supply level. In the one-way carsharing-only travel mode, the following results were obtained: (1) the evening commute pattern is not a simple mirror image of the morning one when spatial parking is considered in both scenarios with and without pricing; (2) when taking account of elastic demand, in optimal time-varying pricing regimes, the charging scheme automatically leads to the socially optimal demand level, but in free-pricing regime, additional user anonymous tax must be charged to achieve the optimal demand level; and (3) the station-based one-way carsharing service benefits the public in aggregate social cost saving compared with the mode of driving a self-owned car.

EVALUASI KINERJA STRUKTUR RANGKA BETON BERTULANG BALOK LEBAR DENGAN DISTRIBUSI BEBAN PELAT SATU DAN DUA ARAH

A reinforced concrete frame building system using wide beams is a solution for buildings with limited heights to get a larger number of stories, a higher distance between stories, and flexibility in installing architectural elements and MEP. This analytical study was conducted to evaluate the behavior and performance of open-frame structures with wide beams for one-way and two-way slab system conditions. This study was carried out using a structural analysis program by applying linear and nonlinear analyzes to four models of a five-story structure with square columns, which varied in beam dimensions and slab systems. The variations considered are normal beam with one-way slab system (1wSN), normal beam with two-way slab system (2wSN), wide beam with one-way slab system (1wSW), and wide beam with two-way slab system (2wSW). All structural elements are designed to follow and meet the criteria of the Indonesian Building Codes, which are then followed by a non-linear static pushover analysis to obtain the performance of each structural model. The results of the analysis show that a structure with wide beams has greater deformation than a structure with normal beams with a faster achievement of collapse conditions so that the ductility of the structure also becomes lower. This is caused by the stiffness of the wide beam-column joints is lower than that of the normal beam-column joints. The use of one-way or two-way slab systems on structures with wide beams does not have a significant effect

The modification of channel system in Tahai lowland irrigation area to improve drainability

The Tahai lowland irrigation area relies on rainwater as a source of irrigation water. The channel system network in Tahai is comb-type with a primary channel connected to the Kahayan River and the end of the primary channel is not connected with other flow sources. The end of the secondary channel is also no longer connected with the collector channel. This condition impacts dissolved solids deposition at the end of the channels. Hydraulic simulations need to be conducted to determine the spread of dissolved solids derived from the fields in the existing water channel system. The existing water channel system could be transformed into a one-way flow system with a right collector channel to expedite water drainage into the Kahayan River. This water channel system plan is also modeled and simulated using HEC-RAS. Hydraulic simulations showed an improvement in channel drainability. At the end of the simulation, the number of dissolved solids in the secondary channel in the one-way flow system was less than that in the existing water channel system.

Islamic Education in the Freedom Learning Era from the Perspective of Paulo Freire

The teacher-centered one-way education system weakly influences the educational output. Teachers are likened to savers and students to accountants, regardless of their problems. This is the "Bank Style" education system being sued by Paulo Freire, who is striving to create a humanistic-dialectical and critical education system. Through Minister Nabiel Makarim, Indonesia carried out an educational innovation, namely the "Freedom Learning" policy. This policy emphasizes "Freedom and Independence" by designing education to produce superior human resources as student profiles. Instill the values and attitudes of independence, volunteerism, democracy, tolerance, security, order, and peace that act as agents of change that can provide solutions to various national problems. This research is qualitative technically in collecting data using primary and secondary sources in the works of Paulo Freire and Islamic Education, as well as the Freedom to Learn program. Data processing uses the hermeneutic method. Meanwhile, data analysis uses reductive, display, and triangulation methods. The results of this study are: First, it explains the complex reality of Indonesian Islamic Education in the Freedom to Learn era. Second, explaining, exploring, and criticizing Paulo Freire's significant thoughts on Islamic Education in the Free Learning Era. Third, analyze Paulo Freire's thoughts which are significant for Islamic education in the Era of Freedom Learning. Producing superior and independent human beings cognitively, affectively, and psychomotorically. The role of an agent of change, creating a productive and highly civilized society ready to face the competition in the global world.

Demonstrating a real–time QAM–16 visible light communications utilizing off-the-shelf hardware

This study aims to design, implement, and demonstrate a one-way real-time VLC system through DCO-OFDM using QAM–16 as the Mapper (Modulator). The system was divided into two units, namely VLC Server (transmitter) and Client (receiver), based on a low-bit rate transmission applications with running text, which is often found in digital signage. The uniqueness of this report focuses on the use of low-cost components for VLC transceivers, including DSP and ASP. In this condition, DCO-OFDM digital blocks were embedded within the generic-purpose Microcontroller as DSP (STM32F4 Development board), with available and widely assessed libraries being utilized for implementation in the proposed system, to speed up the DSP development process. Meanwhile, the ASP contained a linear LED driver as a substitute for the commercial Bias-T function, as well as the AFE receiver with the Op-Amps circuit blocks. The developmental approach of the VLC system was also carried out by simulation and realistic implementation, where the productions of the DSP and ASP sections, especially the DCO-OFDM with the QAM–16 mapper and the AFE receiver, were performed on MATLAB® and SPICE®, respectively. Additionally, the transfer of QAM–16 modulated data was realistically performed by observing the impact of the optical channel distance changes on the behavior of the constellation diagram.

Post-cyclic Loading Relationship Effects to the Shear Stress and Cyclic Shear Strain of Peat Soil

Peats originate from plants and denote the various stages in the humification process. This condition renders the peat extremely soft and can be considered problematic soil. Thus, this study is conducted to examine and comprehend the particularities of peat engineering behaviour in respect to the relationship effects to the shear stress and cyclic shear strain of peat soil various characteristics to establish suitable correlation. This study carried out by using triaxial testing described by geotechnical test standards BS-1377: Part 8: 1990. Methods of Testing Soils for Civil Engineering Purposes: Shear Strength Tests (Effective Stress) that required for consolidated undrained and consist of five main stages: saturation, consolidation, static, dynamic, and post-cyclic loading using the GDS Enterprise Level Dynamic Triaxial Testing System (ELDYN). The parameters of shear strength were obtained in the peak deviator stress at a maximum of 20% of axial strain by using an undisturbed sample with an effective pressure imposed of 25, 50, and 100 kPa. In this study, all specimens are subjected to cyclic loading up to 100 cycles based on a one-way loading system with strain-controlled conditions. Based on the analysis conveyed, the post-cyclic shear stress decreased compared to its initial value of about 65.56 kPa (PNpt-100 kPa) in static and decreased to 14.9616 kPa in post-cyclic (PNpt-25 kPa-1 Hz). The principal stress ratio (σ'1/σ'3) shows the maximum values of this ratio that are located in the narrow zone of 1.61 to 1.12. Doi: 10.28991/CEJ-2022-08-12-08 Full Text: PDF

Coupled microbeads for unidirectional cascade lasing transfer

One-way photonic devices are based around the concept of directionally-dependent propagation of light that can be used in the design of optical circuits. We demonstrate a straightforward method arising from cascade lasing transfer using a pair of coupled microcavities. The concept is based on consecutive down-converted laser transmission leading to net cross-cavity propagation in one direction. To describe this system, we first develop a simple, generalized coupled-cavity rate equation model to calculate the efficiency of the lasing cascade process. The basic idea is then demonstrated experimentally using a coupled resonator geometry. The two-cavity lasing design forms a basic three-wavelength microdevice that can change the original lasing wavelength or act as a one-way down-converting micro-lasing system.

One-way flow system for improvement of the acid sulfate soil reclamation process in the Belanti II tidal swamp irrigation network, Central Kalimantan, Indonesia.

Belanti II tidal irrigation network was developed in 1980 on acid sulphate soil with an area of approximately 3976 ha. Belanti II has one primary channel and several secondary channels, without any water structures that regulate the direction of flow. Two-way flow occurs in the channel, supplying fresh water from the river at high tide and flowing back into the river at low tide. This two-way flow system inhibits the leaching process of acid sulphate soil. Up to now, acid sulfate soils are still found at a depth of 50-75 cm with a pH of 2.5 ~ 3.5. A one-way flow system is expected to improve water circulation, assisted by channel rehabilitation, collector channels and water control structures. The spillway structure at the secondary channel regulates the freshwater supply at high tide and the flap gate at the end regulates the flow of water to the collector channel at low tide. Hydraulic analysis was carried out using HEC-RAS modelling. The results showed the ability of the system to supply fresh water, flushing/leaching acid sulfate water and drainage the toxic water. The effectiveness of the system is evaluated regarding the direction and the volume of freshwater flowing into the secondary channel.

Backswamp Development’s Effects on Water Management System of Tidal Swamp Irrigation Palingkau SP1 SP2 SP3, Kalimantan, Indonesia

The Palingkau SP1 SP2 SP3 swamp irrigation is an expansion of handil’s agricultural area, which is influenced by tides from the Kapuas River on the left and the Kapuas Murung river on the right. The new area that exploits backswamp and the buffer zone upstream of Handil, gives an additional burden of dispersion of toxic materials resulting from the oxidation of acid sulfate soils and the loss of fresh water supply from backswamp. The actual leaching process is indicated by the water pH value in the collector and primary channels ranging from 2.58 ~ 3.6. Meanwhile, the water quality of Handil, Kapuas and Kapuas Murung rivers is better, ranging from 3.7 ~ 5.34. The confluence of tidal from two opposite sides has resulted in the disruption of pollutant discharge. Instead of discharged into rivers, its flow to Handil’s agricultural area and reduce agricultural productivity. The HEC RAS software simulation model is used to evaluate the optimal water management system. One-way flow system is introduced hydraulic structures for regulating the flow of freshwater water at high tide from the left handil into the new irrigation area and regulating the drainage at low tide through the right handil.

ANALISIS PENDAPATAN PEDAGANG PUSAT PERBELANJAAN DEPOK JAYA SEBELUM DAN SESUDAH ADANYA SISTEM SATU ARAH DI KOTA DEPOK JAWA BARAT

The goal of this study is to see how income and location differed before and after implemented a one-way system. The population in this study consisted of all traders in the Depok Jaya Shopping Center, with 61 samples based on purposive sampling criteria. A descriptive quantitative method was applied in this research. The difference income before and after the oneway system was implemented at the Depok Jaya Shopping Center was determined using descriptive percentages and a paired T-test in this study. The paired t-test findings reveal that for gross income, the t-count value (23,463) is more than the t table (2,00030) with a decrease in gross income of Rp. 1,155,737.705 for net income, the t-count value (15,957) is greater than the t table (2,00030) with a decrease in net income of Rp. 346,721.331, indicating that H0 is rejected and H1 is accepted, indicating a difference. the average income in Depok Jaya Shopping Center before and after the oneway system was implemented.

Vehicle Detection Monitoring System using Internet of Things

The overcapacity of vehicle numbers is one of the significant causes of the traffic congestion problem on Indonesia roadways. The government applies a One-way system (SSA) as one proposed solution to unravel the congestion. However, several congestion points are still found during the SSA implementation. Thus, this research offers an alternative method to detect congestion using IoT technology. The system automatically enumerates the number, classifies the type, and computes the speed averages of vehicles to identify the severity of congestion based on the Indonesian Highway Capacity Manual (IHCM) published by the Ministry of Public Works 2014. We utilize ultrasonic sensors to detect the vehicles and send the data to the server in real time. The research successfully develops an IoT system for traffic congestion detection. Communication between nodes and API can be done well. Data exchange involving encryption and decryption with AES-256 is successfully done. The website application developed in this research successfully show the severity level of the congestion and their vehicle numbers. The average accuracy of the system is 78,97%. The system detected more vehicles than actual numbers due to the misreading value of the sensors.

The effect of one-way system implementation on traffic performance on Arif Rahman Hakim Road, Depok City, Indonesia

<p>Depok City has traffic movement characteristics that are no different from other cities. Traffic movements in Depok City are quite busy and even tend to be congested at certain hours, such as when people go to work and return from work as happened on Arif Rahman Hakim Road which is a 4/2D road type (4 lanes 2 divided directions) which often experiences traffic jams. Efforts to overcome traffic jams are by implementing a system change from 4/2 to 2/1 (two lanes one way) which is expected to improve traffic performance. Observing this phenomenon, this study intends to determine the effect of implementing a one-way system on traffic performance. The findings in the field show that the application of a one-way system can improve traffic performance with an increase in the level of road service in one lane. The results of multiple regression analysis using vehicle situation, side barriers, and road situations simultaneously have a significant effect on traffic performance with an effect value of 10.3%.</p>

Understanding the factors associated with one-way and round-trip carsharing usage based on a hybrid operation carsharing system: A case study in Beijing

As carsharing is promoted in many cities, studying the factors related to station-level demand under multi-mode operating carsharing systems will help better develop carsharing programs. In this paper, the number of transactions is calculated to represent the carsharing demand based on the data from a one-way and round-trip hybrid operation carsharing system in Beijing. The generalized additive model is then conducted with carsharing demand as the dependent variable and five groups of independent variables: station attributes, public transit, built environment, weather, and consumption features. The main results are: (1) the one-way station has a substitution effect on the round-trip station; (2) the one-way and round-trip stations not only have considerable demand in places well served by transit but also can play different and complementary roles in areas underserved by transit; (3) the percentage of residential POIs, the POI-mixed entropy, and the number of cars per household are the most statistically significant factors; (4) weather conditions such as precipitation, high temperatures, and poor air quality play a positive role in carsharing usage; (5) personalized incentives help attract more usage, while the positive effect is minor; (6) both population density and average consumption are highly nonlinear to carsharing usage. Population densities of around 10,000 people/km2 have the largest positive effect on one-way station usage and around 6,500 people/km2 have the largest negative effect on round-trip station usage. When the average consumption exceeds 100 RMB, the usage of one-way stations decreases more rapidly compared to round-trip stations. This study can help the operators understand and refine their business strategies, and can provide insights into determining the location and mode of carsharing stations.

Experimental and Finite Element Study of a Novel Two-Way Corrugated Steel Deck System for Composite Slabs

This paper investigates the structural performance of a new two-way profiled steel decking system for steel-concrete composite slabs. Several studies have investigated steel decking for steel-concrete composite slabs and focused on utilising the conventional deck as a one-way floor system. The newly developed deck consists of top-hat sections formed by bending corrugated sheets at 90°, which are attached to a corrugated base sheet. The deck is designed for improved composite and two-way action contributed by its unique geometry due to corrugations in the transverse and longitudinal directions. This paper experimentally tested a novel steel decking geometry under construction stage loading. It was in the absence of concrete to establish the deck’s suitability for construction and contribution towards loading capacity and performance for future use as a two-way composite slab. Ultimate load, two-way action, and failure modes were identified. A finite element model was also developed, and parameters assessed that could influence the performance when the deck is potentially used in the composite stage. It was concluded that, while increasing the thickness of the corrugated base sheet significantly affects the load-carrying capacity, the thickness of the top hats has no significant impact. Improved load transfer with two-way behaviour is observed when the bottom flanges of the top hats are continuously connected to the bottom flanges of the adjacent top hats to form a deck. This contrasts with the concept deck, where individual top hats are attached to a corrugated base sheet. In this case, decks with a corrugated base sheet perform 54% better in ultimate load capacity than decks without a corrugated base sheet.

A rolling-horizon decision framework for integrating relocation and user flexibility in one-way electric carsharing systems

One-way electric carsharing system has become the most widely used form of carsharing service in practice. However, the demand uncertainty, car imbalance, parking shortage, and battery charging jointly impose great challenges upon the operation. Many carsharing operators, e.g., GoFun, offer incentives to flexible users for accepting alternative itineraries and also adopt a full reservation policy. In this paper, we propose a rolling-horizon decision framework that integrates the operator’s car and staff relocation decisions, user flexibility, and charging of electric cars in the real-time setting. We formulate the problem at each decision epoch as a time–space network flow model that simultaneously optimizes the decisions. We develop an iterated local search heuristic algorithm to solve the model for large-scale practical problems. Based on theoretical insights and clustering of stations, we develop new local search procedures customized for the dynamic carsharing problem. We use real-world data from GoFun as an example to conduct extensive computational experiments. The results show that our algorithm significantly outperforms a particle swarm optimization algorithm and the popular greedy policy, and also has a low efficiency loss compared to the off-line heuristic solution. The transportation network size, clustering size, and operational efficiency are revealed to have significant impacts on the profit and service level.

Analysis of Traffic Performance in Arif Rahman Hakim Road Depok City, Indonesia

In an effort to overcome congestion on roads, it is necessary to carry out traffic engineering, one of which is by changing the traffic lane from two directions to one direction. One of them is on Jalan Arif Rahman Hakim, Depok city, which is a two-way (4/2D) road that experiences congestion during rush hours, and to overcome congestion, traffic flow is changed to one direction (2/1), where at two-way system and one-way system have an effect on traffic performance. Data retrieval through questionnaires with data collection tools using google form, all data results were analyzed using multiple linear regression using IBM SPSS version 22. From data analysis, it was found that the factors that affect traffic performance in a two-way system are vehicle situations, obstacles on the other hand, the road situation has a negative effect on traffic performance, where on the one-level service line (C) and on the two-level service line (C). In the one-way system, the vehicle situation, side barriers have a negative effect and the road situation has a positive influence on traffic performance where in the first lane of service level (C), and in the second lane of service level (B). While the most dominant factors influencing traffic performance in a two-way system are side barriers and road situation, in a one-way system are side barriers Keywords: Congestion, Traffic engineering, Two-way system, One-way system, Traffic performance.