This study aims to examine the influence of capital structure towards firm value. The sample of this research consists of 101 manufacture companies listed in the Indonesian Stock Exchange during the period 2012-2015. The results of this study indicate that the higher the capital stucture with Debt to Equity Ratio (DER) and Long term Debt to Asset Ratio (LDAR) are indicators of a higher firm value, while lower Long term Debt to Equity Ratio is an indicator of a lower firm value. The study has found a positive correlation between Debt to Equity Ratio (DER) and Long term Debt to Asset Ratio (LDAR) to firm value, and a negative correlation of Long term Debt to Equity Ratio (LDER) to firm value. However, the capital structure with Debt to Asset Ratio (DAR) did not seem to have an influence on the firm value.

Congestion has become a common problem in urban. The road growth-rate is always slower than vehicles. City mayor around the world already understands and try to find breakthroughs. Unfortunately, the settlement is often partial and ignore the spatial analysis. This paper seeks to solve urban transport problem in urban with information technology and spatial analysis. The research began with a survey of public transport routes, a review of the transport regulation, one-way road arrangement study followed by WebGIS Development. This application is a multi-tier client-server architecture consisting of the client-side, the server-side, and the data directory that stored in the VPS (Virtual Private Server). The client-side is powered by HTML-5, which is assisted by the API (Application Programming Interface) from several open-source online mapping. Standard performance test of the application has been set, and every menu is well functioned. Every data on the transport infrastructure could be gathered and stored on the web. Furthermore, every transport planning on the city should refer to this transport information system. Thus, WebGIS becomes online surveillance system for land use.

The waste of husks and corn cobs that relatively abundant in Indonesia is mainly used as animal feed. Its utilization is still not maximized and pollutes the environment a lot. Corn husks and cobs contain silica, which can be used as a raw material in the manufacture of SiO2 silica gel. This study aims to obtain SiO2 from corn husk and cob ash using the sol- gel extraction method to determine the effect of ashing temperature and mass ratio of corn husks and cobs and the characteristics of silica gel. The method used in this study is the sol-gel method. The characterization of silica gel utilizes FTIR (Fourier Transform Infra-Red) and XRF (X-ray fluorescence) as a process. The result indicates that the FTIR shows an absorption pattern of silica with silanol (Si-OH) and siloxane (Si-O-Si) groups, with an amorphous silica phase at an ashing temperature of 750 ℃ and crystalline silica at an ashing temperature of 850 ℃. XRF results determine that the yield of Si and SiO2 produced in corn husks tends to be higher than corn cobs and at an ashing temperature of 750 ℃ tends to be higher than 850 ℃.

The dimensions of the triple bottom-line approach to sustainable development contain inherent conflicting goals in implementation. In cases of urban development around the world, this is exemplary for settings in major port cities. Here, mostly economically oriented infrastructure requirements of the ports meet more comprehensive concerns of sustainable urban development. There are incoherent governance systems: Ports are often involved in higher-level national planning hierarchies, while urban development is predominantly locally controlled. This is also the case in Jakarta Megapolitan with Tanjung Priok Port, Indonesia, the most prominent and still expanding national seaport. The port expansion is also aimed to be a significant hub in one of the world’s maritime axes, which refers to vast urban growth. However, the entire urban economic effects are uncertain, for example, concerning urban diseconomies of scale or rebound effects, such as traffic congestion, social segregation, conflicts, or the digital divide. Urbanization and the contemporary patterns of economic growth are drivers of environmental vulnerability of both parties. This study serves to overcome fragmented approaches by using a holistic, sustainable governance transition process for integrating urban and port-industry governance concepts. A novel online platform, VIDEL (Virtual Dashboard of Environmentally Logistics-Port-City), is designed as a smart system that engages all stakeholders. This platform binds the requirements and interests as well as harmonizing actors in the interactions of urban with port and industry to secure innovative and environmental-friendly way. It will become a digital control tower for sustainable governance system in a port-city.

In this work, iron oxide materials α-Fe ₂ O ₃ and Fe ₃ O ₄ were investigated as alternative electron and hole transport layers (ETL and HTL) in planar perovskite solar cells (PSCs). Devices were fabricated with the configuration ITO/α-Fe ₂ O ₃ /PCBM/Perovskite/Fe ₃ O ₄ /PEDOT:PSS/Ag using a spin-coating method. Structural, optical, and electrical properties were characterized by X-ray diffraction (XRD), UV–Vis spectroscopy, and current–voltage (J–V) measurements. XRD confirmed the presence of distinct α-Fe ₂ O ₃ and Fe ₃ O ₄ crystalline phases, while UV–Vis analysis revealed enhanced absorption and a reduced optical bandgap of 2.04 eV. Devices incorporating both oxide layers achieved improved charge separation and interfacial contact, leading to a power conversion efficiency (PCE) of 0.83%, nearly 30 times higher than the reference device without oxide layers. These findings highlight α-Fe ₂ O ₃ and Fe ₃ O ₄ as promising low-cost, stable transport layers for enhancing the efficiency and sustainability of PSCs.

Mobile Poultry Slaughterhouse Halal (MPSH) is a mobile facility designed to carry out the process of slaughtering chickens in accordance with halal principles in the Islamic religion. Making a prototype of this tool aims to test the functionality of a system or product. The machine development designed in this research uses a drive (transmission) as a combination of pulley and v-belt. The reason for using a drive system as a pulley and v-belt is that it feels easier and more efficient in the work process. This research aims to analyze the calculation of pulley and v-belt sizes suitable for the plucker machine that was developed. This research uses an experimental design method, namely carrying out measurements, observations, and calculations of the technical specifications of the machine, then analyzing the data to obtain an idea of the machine's performance, which ultimately can provide an idea of the suitability of the machine. The research results obtained: (1) pulley sizes 100 mm and 175 mm in diameter, made from ST37 steel. (2) Required v-belt length = 1,253.95 mm. (3) V-belt axis distance = 426.25 mm. (4) The circumferential speed of the driving pulley vP = 10.99 m/s. (5) The circumferential force that arises Frate = 111.37 N. (6) The number of belts used is 1 belt.