bluuebunny/crossref_metadata_2025 huggingface dataset:
Human thermal comfort for residential buildings in hot summer and cold winter region, a user based approach
Authors: Monna Sameh , Barlet Aline , Hussein Muhannad Haj , Bruneau Denis , Baba Mutasim
Published: November 2019

Improving the overall performance of residential buildings means exploring and understanding users’ needs, expectations and aspirations, as these greatly affect human comfort, health and well-being. This paper investigates thermal comfort conditions, based on quantitative measurements of typical residential multi-story apartment buildings in Palestine, and a qualitative survey of inhabitants’ satisfaction with the indoor environment of their apartments. From these data, average perceived comfort indices (APCI) were calculated. The survey shows that inhabitants of each building have different comfort conditions, especially in summer, according to the orientation of the space. Sunshine, air exchange and temperature are perceived as the most influential parameters for apartment comfort. Although the APCI shows a good level of comfort globally, most inhabitants very often feel hot in summer, mainly during the day, and cold in winter, mainly at night. Measurements confirm that inside air temperature always remains below 16°C in winter, below the comfort level. In summer, it remains between 25 and 32°C, outside the comfort zone. The perceived comfort level seems more related to the inhabitants’ feeling of powerlessness than to real thermal conditions.
Photon mapping to accelerate daylight simulation with high-resolution, data-driven fenestration models
Authors: Grobe Lars O
Published: November 2019

Data-driven modelling provides a general means to represent optically complex fenestration in daylight simulation by its Bidirectional Scattering Distribution Function (BSDF). Radiance employs the tensor tree as a compact data structure to store the BSDF at high directional resolution. The application of such models under sunny sky conditions is, however, computationally demanding, since the density of stochastic backward samples must match the BSDF resolution. The bidirectional Photon Map is proposed to rapidly forward-sample the BSDF, starting from the known sun direction. Its exemplary application shows a potential speed-up of ⩾ 98% when compared to backward ray-tracing.
Daylight regulated by automated external Venetian blinds based on HDR sky luminance mapping in winter
Authors: Wu Yujie , Kämpf Jérôme H. , Scartezzini Jean-Louis
Published: November 2019

Automated shading systems have the potential to exploit daylight in buildings to save energy of artificial lighting and cooling loads and improve occupants’f visual comfort. This paper investigates the daylighting performance of automated Venetian blinds based on sky luminance monitoring and lighting computation in winter. ‘fIn-situ’f experiments were carried out in a daylighting test module when the solar elevation angle was 21.7. at noon. Experimental results showed the automated shading was able to maintain work-plane illuminance within [500, 2000] lux range for 88% of the working time under a clear sky and for 83% of the working time under a partly cloudy sky, while mitigating discomfort glare for occupants.
Impact of dynamic lighting control on light exposure, visual comfort and alertness in office users
Authors: Benedetti Marta , Maierová Lenka , Cajochen Christian , Motamed Ali , Münch Mirjam , Scartezzini Jean Louis
Published: November 2019

The lighting environment at indoor workplaces is important not only to provide vision and visual comfort, but also for light’s direct influence on human physiology, cognitive performance and mood. The purpose of this ongoing study is to investigate the impact of a dynamic control of combined daylight and artificial lighting on office users’ visual comfort as well as on alertness and cognitive performance. We are going to evaluate the impact of two different office lighting conditions in a quasi-real setting on subjective alertness ratings in healthy young participants over several days. We will compare an office with optimized daylighting and artificial lighting, operated by a new control system with a standard office room, where the lighting/shading can be changed manually. The aim of this balanced crossover within study design is to show that exposure to optimized dynamic lighting control over several days is superior on subjective alertness and glare indexes, when compared to a conventional lighting control. Here, we present some preliminary results from the first six participants on the comparison of subjective evaluations of alertness and the objective monitored (day-) light exposures and glare index Daylight Glare Probability (DGP) in the two different conditions over one week (five days) each.
A holistic approach for a natural light variation experience: a pilot study of a practical application for office lighting
Authors: Adamsson Mathias , Petersson Mikael , Aries Myriam
Published: November 2019

Lighting is crucial for vision and has important effects beyond vision, influencing a variety of physiological and behavioral processes. When designing lighting, visual aspects, effects beyond vision, and perception of the environment should be considered together in a holistic approach. As humans evolved under daylight, a lighting protocol, based on a room context and daylight characteristics, was developed and described. The lighting, with customized light levels, spectral composition and light distribution that changed dynamically to evoke a perception of daylight conditions, was realized using commercially available luminaires and a digital control system. The resulting lighting conditions are described by measurements
A smart luminaire in an office environment: impact on light distribution, user interactions and comfort
Authors: Nembrini Julien , Kämpf Jérôme H , Papinutto Michael , Lalanne Denis
Published: November 2019

A smart luminaire able to change the direction of its light beam is installed in an office environment and compared to the available LEDs fixtures. Standard lighting measures are performed and a controlled user experiment is conducted, involving 22 subjects. Qualitative results suggest that very low illuminance levels can be characterized as comfortable. Quantitative results supported by statistical significance reveal (1) wider use range of illuminance levels for the smart luminaires, (2) an interaction decrease during the experiment and (3) different usage of the luminaire depending on the subject’s side. Advantages and drawbacks of digitally actuated luminaires are briefly discussed.
An innovative PCM Storage System to enhance Building Energy Autonomy: experimental and numerical characterization
Authors: Robadey J.
Published: November 2019

Even if the use of renewable energy sources towards autonomous buildings is promising, it is facing a fundamental issue: the shift between energy production and heating energy demand. We propose in this paper a thermally controlled storage solution using phase change materials integrated in the building walls. Its main advantage lies in the ability to activate on-demand the thermal discharge by ventilating the phase change materials. A test bench has been manufactured. Tests were performed which proved the feasibility of overnight storage with morning discharge allowing an internal air temperature increase of 5°C. Simulations based on experimental results showed that an integration in real buildings with photovoltaic energy production allows to significantly increase the building energy autonomy. If the improvement is important for all types of buildings, it showed larger absolute improvements for weakly insulated buildings than for buildings with an efficient insulation.
Building thermal bridge heat losses quantification by infrared thermography. Steady-state evaluation and uncertainty calculation
Authors: François A , Ibos L , Feuillet V , Meulemans J
Published: November 2019

This study deals with the measurement of thermal bridges properties in building walls. The methodology is tested on an experimental wall built in laboratory. The setup thermal bridges transmission coefficients ψ and χ are measured in steady-state by infrared thermography. To do so, the thermal bridges impact factor Itb
is calculated. In the proposed method, the value of the surface emissivity is not required: only apparent temperatures are used. Experiments proved good reproducibility. Calculations of the uncertainties enabled to identify infrared measurements as the main sources of error.
Influence of energy retrofit on material flows: comparison between various strategies
Authors: Gobbo Emilie , Trachte Sophie , Massart Catherine
Published: November 2019

Cities are fast growing and their dependence on external services and supplies increases with time. In Europe, the existing building stock is both ageing and energy-demand intensive: its energy retrofit becomes necessary, this resulting in waste generation and pressure on the availability of raw materials. New approaches such as circular economy are arising to face these challenges. However, principles of circular economy are not necessarily associated with energy concerns. To address this gap, this paper considers the current need of retrofit strategies in an urban mining perspective. A methodology based on a bottom-up approach is proposed, aiming to evaluate the impacts of energy retrofit strategies on material stocks and flows at the building scale.
Understand, simulate, anticipate and correct performance gap in NZEB refurbishment of residential buildings
Authors: Flourentzou Flourentzos , Ivanov Antonov Yovko , Samuel Pantet
Published: November 2019

The gap between expected and real energy performance of new or newly refurbished residential buildings was an unexpected mine in the way towards a 2000 W society in Switzerland. Previous research has contributed to understand and quantify this gap by providing knowledge for the extent and amplitude of the problem. Now it is necessary to go into detail understanding of this phenomenon, in order to anticipate and correct the problem. This article analyses statistical findings of heating energy consumption in a whole Swiss canton – Geneva – and shows that results of specific research works on limited apartment residential building samples can be generalised. We show that the performance gap may be simulated with simple common tools, used for compliance energy calculations by applying the right conditions of use. We introduce the notion of “standard”, “realistic” and “out of control” conditions of use. We simulate energy performance of the most common refurbishment actions on a standard existing residential building using these values and we compare the results with observed values on case studies or statistical samples. We show that simulations with the “out of control” conditions predict the performance gap of refurbished buildings. We may also observe that there are combinations of refurbishment works subject to higher or lower risk of performance gap. Simulating the performance deviation, we show which conditions of use must be better controlled to anticipate and limit the problem.

A post-publication change was made to this article on 22 Apr 2020 to add an acknowledgment.
Embodied versus operational energy in residential and commercial buildings: where should we focus?
Authors: Dilsiz Ayşegül Demir , Felkner Juliana , Habert Guillaume , Nagy Zoltán
Published: November 2019

We analyze 100 case studies, which were conducted in 23 countries, and contrast their data on embodied and operational energy in residential and commercial buildings. The case studies include conventional, retrofit, low-energy, passive, and net-zero energy buildings. The buildings have different lifetimes varying from 25 to 100 years. We calculate the estimated total Life Cycle Energy (LCE) as the sum of Embodied Energy (EE) and Operational Energy (OE). The LCE in the 100 case studies ranges from 50.8 to 1840 MJ/m2 per year. Our results show that operational energy significantly dominates the life cycle energy of the buildings by an average of 419 MJ/m2 per year and an average share of 72%. The share of embodied energy increases with decreasing operational energy. However, the overall LCE decreases significantly when the operational energy decreases. Naturally, the assumptions on the lifetime of the buildings have a great impact on the LCE. We conclude that operational energy should be primarily reduced in order to decrease greenhouse gas emissions from the existing building stock because most of the buildings are already built and changes in the embodied energy are often obtained only through new construction or deep retrofit strategies. Depending on the strategy to decrease OE, the share of EE was found to show wide fluctuations within the case studies, ranging from 4% up to 100%. In addition, most of the operational energy consumption has been reported by using energy simulation tools. Only about 14% of the case studies had metered operational energy data. In order to create more accurate data, metering of buildings should be considered in future case studies.
Energy saving potentials in historic buildings’ renovations: to which extent is the heating demand limit value (SIA 380/1) reachable and at which costs?
Authors: Favre Didier , Padey Pierryves , Goulouti Kyriaki , Lasvaux Sébastien
Published: November 2019

The renovation of historic buildings is essential to meet the Swiss objectives for energy consumption in 2050. These buildings offer a great saving potential, however, the heritage preservation has to be considered in the renovation scenarios. While essential for the historic conservation, this consideration restricts the renovation possibilities to achieve the heating demand requirements according to the SIA 380/1 standard. This study introduces a framework for identifying the suitable historic buildings’ renovation schemes considering life cycle costs, energy and life cycle environmental impacts. With a case study, the feasibility of achieving the energy performance SIA 380/1 standard is then discussed.
Effects of modified near-infrared retro-reflective film on urban thermal environment
Authors: Inoue Takashi , Takase Kozo , Saito Yukiya
Published: November 2019

We investigated the specifications of a modified retro-reflective film for the window surfaces of buildings that reflects the near-infrared component of incident solar radiation upward toward the sky in order to reduce the indoor cooling load in the building and improve the thermal environment of the surrounding urban area. With the previous specifications, there were concerns that the near-infrared component, reflected upward away from one building, would strike the upper portions of neighboring buildings. To minimize this effect by reflecting as much radiation as possible back along the incident direction, we evaluated the modified film structure, replacing a saw-tooth section model with a pyramid-type microstructure model. In order to investigate its merits and quantitatively assess the impact of this technology on surrounding urban areas, annual simulations with this modified film were performed, using simple block model, actual city model and the results of an experimental study.
From university to industry - challenges in upscaling optical microstructures for daylight redirection in buildings
Authors: Kostro André , Couty Philippe , Moroder David Geisler , Pohl Wilfried , Schüler Andreas , Hafner Andreas
Published: November 2019

In this paper we present some of the challenges faced when upscaling optical microstructures from a lab scale 1x1 cm sized proof of concept sample to a square meter sized object that can be installed in a building. The optical microstructure in question is obtained by a chain of fabrication steps, all linked with each other and with a certain level of complexity. Each of the total of 8 distinct steps presented difficulties that will be briefly introduced in this paper. On a less technical level, long term commitment of public funding and industrial partners was the base for the first upscaling of this complex technologies for pilot production. Taking the best from two worlds: industry and academia has proven effective in the development of such a novel technology.
Cool, photoluminescent paints towards energy consumption reductions in the built environment
Authors: Rosso Federica , Fabiani Claudia , Chiatti Chiara , Pisello Anna Laura
Published: November 2019

Nowadays, passive strategies are identified among the preferred solutions to reduce energy consumption and to increase comfort in the built environment. Indeed, such strategies allow energy saving by exploiting the intrinsic characteristics of materials. In this work, an innovative cool, photoluminescent paint is considered for application in the built environment, as a passive strategy to (i) reduce energy for cooling in the hot season, (ii) maintain lower surface and air temperatures, thus benefiting comfort and (iii) contribute to the lighting of the outdoor public space. The cool, photoluminescent material is first described, then its implementation in the built environment is hypothesized. An experimental, in-lab characterization is conducted to measure the optics characteristics of the samples. Finally, possible implementation of the investigated material in the built environment is investigated by means of dynamic simulation, in terms of thermal- and lighting-energy performance, when applied on the external envelope of a case study building and as an advanced paving solution in a public space. Results from this preliminary study show that the investigated material has promising features, since it can save up to 30% energy for cooling and 27% yearly energy for lighting.
Obtaining and characterization of nanostructured coatings of zirconia-alumina-ceria by thermal spray flame
Authors: Rodríguez L F , Ferrer M , Peña G
Published: November 2019

Zirconia, alumina and ceria powders were agglomerated, by granulator disk, to be used as raw material in the manufacture of coatings on red clay substrates by flame spray. Three mixtures of different compositions were made to determine which of them produces the most homogeneous and best bonded coatings. Likewise, the phase transformations that occur in the thermal spraying process were evaluated. The morphology and microstructure of the powders and coatings were determined by scanning electron microscopy and X-ray diffraction, respectively. Bimodal coatings were obtained, preserving the nanometric structure of the powders, homogeneous, low porosity and good adhesion.
Determination of expandability clay from San José de Cucuta metropolitan area, by varying calcination temperature and time
Authors: Sánchez J , Cáceres J R , Rojas J P
Published: November 2019

In this article, the volumetric change of the clay granules and sewage sludge (technological nutrient), San José de Cúcuta metropolitan area raw materials, when calcined at different temperatures and different burning times is shown. The main objective is to evaluate out the work right conditions (temperature and time), for the production of light aggregates from expanded clay. The methodology that was followed consists of three phases: preparation and pelletization of clay mixtures and technological nutrient; application of heat treatment in a set of muffle furnaces; and application of statistical treatment with the help of Software R. One of the most important results is that the expansion of the clay is indifferent to the time it takes to cook the pellets, and that this property depends solely on the temperature of burning. The temperature that generates the greatest expansion is 1,200 Celsius degrees, using a set of muffle furnaces.
Mineralogical, microstructural and porosimetry analysis in three different clayey soils
Authors: Ruge J C , Palacios X , Molina-Gómez F , Rojas Suárez J P
Published: November 2019

Diffraction, scanning electron microscope and helium porosimetry techniques have been shown to be suitable for obtaining physical and mineralogical properties in soil samples. The X-ray fluorescence spectroscopy allows obtaining the elemental composition of the sample, while the X-ray diffraction technique permits obtaining a qualitative and quantitative composition of the soil minerals. On the other hand, scanning electron microscope shows the microstructure of the soil and the helium porosimetry measures the pore size, volume, distribution, density and other porosity-related characteristics of the material. This document presents the characterisation of three different clayey soils by an experimental plan that included mineralogical, microstructural and porosimetric tests. The soils used were bentonite, kaolin and a natural clay retrieved near to Bogotá city, Colombia. Results obtained from this study allow providing a better understanding of soil behaviour, which traditional mechanical tests do not explain.
Cost comparison between reinforced concrete moment resistant gantry system and reinforced concrete industrialized structural wall system
Authors: Rojas-Suárez J P , Orjuela-Abril M S , Prada-Botía G C
Published: November 2019

The system of porticoes resistant to moments of reinforced concrete is a set of beams and columns connected by means of knots that allows the generation of adequate spaces with facility before changes by the same users, whereas the industrialized system of structural walls of reinforced concrete, they are used for numerous, repetitive and of low price real estate, but they are completely immobile and in some occasions with problems of segregation and anthills. In this research work, a comparative study of the costs and budgets of the two proposed structural systems of the building was carried out in order to determine the structural system with the lowest costs and execution times, showing the results in explanatory graphs.
Technical feasibility study for the implementation of pedestrian safety mechanisms
Authors: Rojas-Suárez J P , Orjuela-Abril M S , Prada-Botía G C
Published: November 2019

The increase in distractions when driving or walking on a road has proportionally increased the number of accidents that occur each year, with pedestrians being the most affected. For this reason, an attempt is made to study the characteristics of a vehicle road, identifying the critical points and road sections of maximum demand of the inhabitants, who are the ones most in need of pedestrian crossings. For this reason, a statistical and technical study of traffic is proposed by means of vehicular gauges with respect to the most representative days that help to determine quantitatively the vehicular flow that circulates through this road corridor, by means of graphs, tables that help to identify the statistical data without still leaving aside the importance of a study of pedestrian traffic by means of a count in typical days of mobilization with the purpose of determining the pedestrian volume, due to its increase in the indexes of accidents caused by different types of transport, in which the motorcycles stand out.
Optimal percentage of asphalt cement in MDC-19 for flexible pavements in the city of San José de Cúcuta, Colombia
Authors: Hurtado-Figueroa O , Eslava-Vila B E , Cárdenas-Gutiérrez J A
Published: November 2019

Samples were taken of the stone material used for the design of asphalt mixtures, extracted from the 3 water sources present in the city of San José de Cúcuta, Colombia, the Táchira, Zulia and Pamplonita rivers. The aggregates samples were analyzed under the regulations of the Instituto Nacional de Vías in its update of 2013 that applies to Colombia. Asphalt cement was used from the manufacturing plant and industrial processes located in the city of Barrancabermeja, Colombia. Five dense hot mixes-19 were designed for flexible pavement with different % of asphalt cement, 4.5%, 5.0%, 5.5%, 6.0%, and 6.5% percentages suggested by article 450-13 of the “Instituto Nacional de Vías”. With each one of the percentages 3 briquettes were elaborated, taking as guide the established in the norm of tests of the “Instituto Nacional de Vías”. The resistance to plastic deformation of asphalt mixtures designed in the laboratories of the Universidad Francisco de Paula Santander in the city of San José de Cucuta, Colombia and the company Maqinteligente S.A.S. was determined. The results obtained in each of the tests were tabulated and compared, determining the behavior of the stone aggregates together with the optimum percentage of asphalt cement and its working temperature in each of the mixtures designed. It was concluded that the 3 water sources provide quality material for the design of asphalt mixtures. These results were used to provide information of interest to road construction contractors, whose budgets will be favored by identifying the quality material to be incorporated into their projects, a situation that favors the final result and the delivery of the work to the satisfaction of the beneficiary community, who will see a substantial reduction in the cost of fossil fuels by reducing travel times to their destinations, this being the most notorious environmental characteristic of the research.
Computer technique for the suitability of digital evidence in attacking an information system: Forensic analysis for the digital custody chain
Authors: Jácome-Castilla N , Villamizar-Nuñez C
Published: November 2019

This article presents results of a research project that attempted to create a model of forensics in an information system; since forensic analysis allows to establish the causes of security commitment information system. The aim of the study was to determine the software tools to be used in the management of security incidents in an information system; required for the design of computer art for extracting digital evidence to anchor the chain of custody items. The research methodology was descriptive and applied document type, by analyzing the different tools technique that allows maintenance of digital evidence was designed, preserving the integrity of this as a test mechanism in a judicial process. In this way, the procedures to be performed to store information were established without being altered chain of custody solving the above questions: What is the chronological order in which the events of alteration, transmission or access occurred? What evidence have to believe you are a victim?, what are the damages incurred?, who do responsible for the incident?, what people are suspicious of the event?, who has investigated the incident and which actions has taken to preserve, identify, collect and analyze the data involved?; ensuring this way through technical steps and tools to be used for the preservation of the chain of custody, as an evidence in a court case.
Economic growth model in developing economies
Authors: Gallardo Pérez H J , Vergel Ortega M , Cordero Díaz M C
Published: November 2019

Economic growth is a function of the interactions between the different productive factors framed in the economic policy of an economy. The present work tries to explain the economic growth in developing economies, for which a variation of the model on the dynamics of growth proposed by Lukas is proposed, consisting of using, instead of the production function of Cobb-Douglas, a function of production with constant substitution elasticity, since it is very probable that in incipient economies, this one better reflects the functional relationship between factors of production.
Communications management in the success of projects. Case study: Provincial university
Authors: Hernández F Y , Ramírez R P , Laguado R I
Published: November 2019

The communication project is a key factor to achieve good results in the development of a project; this includes the processes of planning, collecting, creating, storing, controlling and distributing information in a timely manner. In this context, the general objective of the research was to evaluate the communications management for the success of projects in a provincial university. In the first instance, communications assessment at the institutional level is carried out, the type of requirements and the use of communication methods are determined and then a communications plan is proposed. The type of research is descriptive, where a series of variables are selected, each of them are measured independently in order to describe them. As a result of the research, those involved in carrying out the projects were identified, it was obtained that the management of communications ensures a better distribution of information at all levels of the institution, in addition, the design of the communications plan allows the information to be transmitted efficiently and assertively.
Educational contextualization: Memories, oral narratives and subjectivities at the border
Authors: Cerinza-Contento A P , RamirezParis-Colmenares X , Amaya-Mancilla M A
Published: November 2019

The present study conducted in the educational context at the Colombo-Venezuelan border approaches the issue of migrant children vulnerability, the coexistence relationship among equals and the teacher’s pedagogical intervention in the re-signification processes of identity in the self (sameness) and the other (otherness) recognition. This research objective was to characterize the social environment and then determine the citizen actions and attitudes evidenced in the school context and to establish a coexistence protocol. In this study, in which 220 elementary school students between 10 and 12 years old from two institutions at the border region participated deepens in the diagnosis, recognition and development of a classroom work methodology. The methodological approach is qualitative and work in four phases 1) documentary: Analysis of student population to the competent agencies in the region, boards of education and government institutions, among others, 2) field research: identifying the actors, conduct the interviews and apply the instrument for occupational self-evaluation 3) analysis of the findings and interpretation results from the categories carried out with the theory founded. 4) scientific contribution creation. Their oral narratives result mainly indicate that there is a vulnerable student population coming from dysfunctional homes that somehow have to live through the border conflicts; families that are exposed to daily violence in their neighborhoods due to the smuggling of products, many children work as "smugglers": they buy and resell family basket basic and scarce products. The staying of migrant children is fluctuating during the school period.
Response of different local Rice varieties to shallow water depth irrigation in Indonesia
Authors: Puristiawan F F , Maftukhah R , Ningrum D R , Nugroho B D A
Published: November 2019

Shallow water depth (SWD) and intermittent irrigation are methods design to reduce water use of rice plant and maintain rice yield. The objective of this study was to characterize the rice plant growth behaviour of four different local rice varieties cultivated in continuous flooding (CF) and intermittent with shallow water depth (SWD) irrigation. Rice varieties i.e. Ciherang, IR64, Hitam, and Merah were grown in pot experiment with CF and SWD irrigation. Rice growth parameters such as plant height, number of tillers, SPAD, and steam hardness were observed during a season. Different rice varieties resulted different response to irrigation treatment, where Ciherang and Merah varieties under SWD irrigation were significantly improve number of tillers. However, IR64 and Hitam varieties were different. In addition, plant height and SPAD were not significantly different among treatment. Rice cultivation under SWD irrigation of different local rice varieties in this experiment shows that not significantly different from CF irrigation, indicated that rice varieties can be adapted in areas with limited water availability
Development of environmental monitoring systems based on LoRa with cloud integration for rural area
Authors: Hidayat M S , Nugroho A P , Sutiarso L , Okayasu T
Published: November 2019

Wireless Sensor Network (WSN) is widely used in field environmental monitoring recently, because of its ease of use and being able to simplify the complexity installation in real application. Indonesia is an agricultural country with more than 16.5 million of farming land, most of the farming land is located in a rural area. The problems on the implementation of IoT-based environmental monitoring system in a rural area is the limited signal and energy. Accordingly, the objective of this study was to develop an Environmental Monitoring System based on LoRa in a rural area with the implementation of the Local Management Subsystem (LMS) and Global Management Subsystem (GMS) framework to optimize the existing development of the Environmental Monitoring System with focused on optimum distance by measuring the RSSI, signal strength and packet loss. The research was conducted in Bulaksumur Universitas Gadjah Mada, Yogyakarta, with four zones and various obstacles. As the result, Zone D with line of sight was the best result for getting the affordable distance for data transmission. This Zone can reach over 800 m distance with only 20% packet loss.
Determining transparency on material and energy flow in Palm Oil industry
Authors: Kurniawan M P , Guritno A D , Purwantana B , Supartono W
Published: November 2019

Palm oil is a strategic commodity for Indonesia because of its large role in economic and social development. Strengthening the development of a sustainable palm oil industry must refer to increasing responsibility and efficient use of resources towards a sustainable palm oil industry. credible, and transparent. This study describes the role of material and energy flows as the basis for resource use in the production of crude palm oil (CPO). Oil palm plantations and processing have tried to implement zero emission to increase competitiveness and reduce the risk of environmental damage. Data sources, quality, and uncertainty. Developing material and energy flow analysis shows evaluations in human resources, applying technology, reducing emissions, and energy efficiency are issues of relevant resources. It is important to justify and analyze critical industrial systems in reducing material waste. Derivative policy implications for production and consumption processes must be applied based on industrial output.
Crop water requirement of Soursop (Annona muricata L) in Nawungan orchard, Selopamioro village, Imogiri sub-district, Bantul regency, Yogyakarta
Authors: Alviandi D , Murtiningrum  , Ngadisih  , Andriani N , Maharani A A S E , Nugroho B D A , Pradipta A G
Published: November 2019

The aim of this study was to to measure actual evapotranspiration and to determine of water requirement and crop coefficient (Kc) of of soursop (Annona muricata L). The soursop was farmed at Nawungan orchard in Selopamioro village, Imogiri sub-district. Village monographs, 1: 25,000 scale Indonesian earth map and climate data were used to get the purpose of study. An Automatic Weather Station (AWS) was installed in Nawungan orchard to record rainfall, air relative humidity, wind velocity, solar radiation, as well as soil moisture every fifteen minutes. A set of surface runoff equipment was set in soursop farming land. Infiltration test was conducted in nine selected locations of soursop farming land and later, it was used to find soil percolation value. The purposive sampling method was adopted to assign the nine locations of infiltration test. The reference evapotranspiration (ET0) was calculated by the Penman-Monteith method. Later, water balance formula was applied to determine the actual plant water requirements (ETa) and plant coefficient value (Kc). This study proved the reference evapotranspiration (ET0) of the study area was 5.74 mm / day, the actual crop water requirement (ETa) of soursop was 7.98 mm / day. And Kc of soursop was 0.576.
Assessment of soil erosion and landslides susceptibility based on hydrophysic soil properties in Karangkobar catchment, Banjarnegara, Indonesia
Authors: Farizi F A , Ngadisih  , Susanto S , Suryatmojo H , Tando P K V
Published: November 2019

Landslides and erosion are highly influenced by soil properties. Soil texture, structure, particle density, bulk density, and porosity are the properties which correspond to infiltration rates. This study aimed to assess soil erosion rate and landslide in upland of Karangkobar catchment and to explore its correlation to hydrophysic soil properties. Material used in this study were topographical maps, land use maps, administrative maps on scale 1:25000, and soil samples. An unit land map was created by overlying topographic, landuse, and administrative maps. This study found 16 unit lands. Soil sampling and infiltration test were conducted in every unit land. Infiltration test adopted double ring infiltrometer test, while Horton’s formula was applied to determine the value of infiltration capacity. Soil hydrophysic properties in catchment area Karangkobar: texture loam, granular structure, bulk density 0.62 – 1.09 g cm−3, particle density 1.83 – 2.47 g cm−3, and infiltration capacity 1.5 cm hour−1 – 67.9 cm hour−1. Erosion rate was 2 mm year−1 with the potential landslides classified as high. Soil hydrophysic properties which have a strong correlation to erosion was bulk density (r = 0.517 *) and potential landslides was infiltration rate (r = 0.641 **).
Evaluation of terrace design as soil and water conservation technique in Karangkobar catchment, Banjarnegara, Indonesia
Authors: Tando P K V , Ngadisih  , Susanto S , Suryatmojo H , Farizi F A
Published: November 2019

Karangkobar catchment is upland of Serayu watershed, characterized as rough topography, thick soil, high rainfall, and the land use dominated by agriculture. Unfortunately, the agricultural system ignores the principles of soil and water conservation. The purpose of this study was to describe and to evaluate the terrace design as soil and water conservation. The tools used were GPS, roll meter, and abney level. The study was conducted using qualitative descriptive. The purposive sampling method was adopted to determine the terrace point. The indicator to evaluate terrace design were slope, solum, soil texture, and land management. Terrace suitability evaluation used arithmetic matching methods based on technical requirements and observations of soil terracing. This study revealed that the percentage of bench terrace in study area was 43.75%, 25% ridge terrace, 12.5% water drainage channel, and without conservation 18.75%. The suitability of design: 25% was the fit design, moderate 18.75%, and bad design 56.25%. Making and repairing terraces to fit design was costly.
The representative synthetic unit hydrograph in Juana watershed
Authors: Pradipta AG , Nurhady S
Published: November 2019

Rainfall-runoff transformation is carried out when the series of discharge data is limited or unavailable. One of the components of rainfall-runoff transformation is unit hydrograph, which can be derived synthetically. The selection of the representative synthetic unit hydrograph is fundamental related to the results of the further calculation. This study compared three types of synthetic unit hydrograph, that were Gama I, Nakayasu and SCS. The study was conducted in Juana Watershed, which is located in Central Java Province and composed of 52 sub-watersheds. The calculation was carried out in the control point of Sentul Weir by using HEC-HMS version 4.2.1, in the case of January 2014 flood events. The results showed that the peak discharge from Gama I, Nakayasu, and SCS synthetic unit hydrograph were 80.78 m3/s, 85.32 m3/s, and 78.89 m3/s respectively. Those results then compared with the flood mark in Sentul Weir, which was estimated 76.53 m3/s. Therefore, the SCS method was determined as the representative synthetic unit hydrograph in Juana Watershed, refers to the minimum error value of 3.08%. Then the analysis of design flood hydrograph for the 52 sub-watersheds in Juana Watershed can be approached by using the SCS synthetic unit hydrograph method.
Toward modernization of irrigation from concept to implementations : Indonesia case
Authors: Arif S S , Pradipta A G , Murtiningrum  , Subekti E , Sukrasno  , Prabowo A , Djito  , Sidharti T S , Soekarno I , Fatah Z
Published: November 2019

In the last decades before entering 21fts century, many countries of the world have been facing critical issues of less in food production, lack energy availability and weak water recourses management as well. Beside of these issues another phenomenon dealing with climate change also is coming up and treating peoples in some respects. In the developing country such as Indonesia environmental load in term of increasing population rate occur tremendously. More peoples mean more resources have to be provided. However, some recourse is scares and others are not available every time. Better water resources management even this aspect was considered as critical one, but it was could be used as a tool to solve the problems properly. Increasing water users in the river basin would also create competition among of them. Recently about 80 % of water use in the world goes to irrigation purposes and most of them are managed inefficient and less effective way. Changing of government policy and change of ecology may made irrigation water management getting worst. Irrigation management could not implement by using conventional method. A new approach to make irrigation management running better must be setting up. The Ministry of public works and Housing to represent Government of Republic of Indonesia launched irrigation modernization of Indonesia program in year of 2011. This paper aims to present concept and implementation progress of the Program.
Analysis of environmental ergonomics in rice distribution center
Authors: Rizki Z P , Ushada M , Pamungkas A P
Published: November 2019

Environmental ergonomics is dynamic effects of workplace environment to worker productivity. Rice distribution center is a value-added agro-industrial warehouse to support supply chain. Environmental ergonomics must be designed to achieve worker ergonomics and value-added of stored rice. The research objectives was to analyze effect of work capacity, workload and workplace environment to worker productivity. The samples were the 8 (Eight) workers in a sack-opening station. Work station capacity were 131.718 sacks per hour. Research hypothesis stated productivity could be influenced by 7 (Seven) variables as 1) age; 2) work experience; 3) workload; 4) workplace temperature; 5) relative humidity; 6) light intensity; and 7) noise. Based on test of independent variables, age, workload and temperature have significant relationship. 11 (Eleven) regression models were conducted to test the variables. The best model was selected based on adjusted R Square, standard error of the estimate, and value on t statistical test. The research results indicated the best model of Hyperbolic with adjusted R square of 0.754. It can be concluded that 75.4% productivity variation could be explained by all variables while 24.6% by other cause. This results confirmed our previous results that workplace environment influence the worker productivity in agro-industry.
Shallot supply chain analysis using rapid agricultural supply chain risk assessment method: case in Bantul Regency, Special Region of Yogyakarta, Indonesia
Authors: Murtono Y , Ushada M , Suwondo E
Published: November 2019

The supply chain of shallot commodities in Bantul Regency involves several business actors including farmers, middlemen, collectors, wholesalers, retailers, and small traders. In the process of each supply chain, risks will always be encountered. The risks in each tier of shallot supply chain certainly need to be identified and analyzed. The categories of each of these risks will determine the appropriate supply chain risk management steps based on the risk categories obtained. This study was conducted to analyze the risk of shallot supply chains in the three largest shallot producing sub-districts. The Rapid Agricultural Supply Chain Risk Assessment (RapAgRisk) method is used to carry out risk analysis, and the sampling method used was purposive sampling and snowball sampling. The results show that the farmer is the tier with most risks faced compared to the others. Excessive stock is the risk that requires adequate priority to manage, and it is faced by all levels of the shallot supply chain. Meanwhile, farmers are the weakest supply chain actors in bargaining power, and the small traders are the most vulnerable actors in the face of risks associated with quality damage and slow sales rate.
Towards sustainable Salak Pondoh Sleman (Salacca edulis cv Reinw) farming system: a socio-economic perspective
Authors: Nuary R B , Sukartiko A C , Machfoedz M M
Published: November 2019

Salak Pondoh Sleman (Salacca edulis cv Reinw) is a product that has been certified as a geographical indication product. Therefore, maintaining its sustainability is importantly required. This study aims to determine the sustainability status of Salak Pondoh Sleman farming system based on its sustainability index, specifically in a socio-economic perspective. To achieve the goal, the socio-economic factor that influences the sustainability status of Salak Pondoh Sleman farming system was determined. Economic sustainability was assessed based on income, selling price, and farming costs, while social sustainability was reviewed based on the participation of farmers in their group. A structured questionnaire was developed and distributed through a survey in three subdistricts area within Sleman subdistrict, namely Tempel, Turi, and Pakem in 2019. A multi-dimensional scaling for Rapid Assessment Techniques for Salacca (RAPSalacca) test, a test developed for determining sustainability index based on an influential factor, was performed and revealed that selected attributes contribute to sustainable farming of Salak Pondoh Sleman. The sustainability of Salak Pondoh Sleman farming system is further explained in this study.
Ergonomic risk identification for rice harvesting worker
Authors: Mulyati G T , Maksum M , Purwantana B , Ainuri M
Published: November 2019

This paper studies important factors that influence the physical workload of rice harvesters. Rice harvesting in Java, Indonesia, mostly uses manual and semi-mechanical methods that require significant physical energy. These harvesting methods have potential Ergonomic Risk Factors (ERFs) that are skeletal, muscle, and peripheral nerve disorders called Musculoskeletal Disorders (MSDs). Surveys and observations of 7 workers of manual and 9 workers of semi-mechanical rice harvesting practices were done in Bantul Regency, Yogyakarta Province. The dependent variable of Cardio-vascular Load (CVL) was formulated in multiple linear regression equations by some independent variables, that were age, smoking habits, heart rate, and ambient temperature. The results showed that age and ambient temperature variables correlate strongly with CVL manual worker. CVL semi-mechanical worker was strongly correlated with age and heart rate. By F test, manual worker workload, 94.5% was significantly influenced by variables of age, smoking habits, heart rate and ambient temperature. CVL semi-mechanical workers were only 91.1%. To avoid high CVL, the age factor of workers is a major consideration. MSDs occur in the upper and lower back for manual workers, while semi-mechanical workers occur on the lower back and both hands. From the assessment of work posture in 4 elements of harvesting, transporting element was the activity with the worst posture. Ergonomic interventions are needed to reduce ergonomic risks in transportation.