Abstract
Covid-19 is something that was never expected, it can turn into an endemic virus in the community. There is a possibility that this virus will not be completely destroyed. This makes the ...world and Indonesia in an uncomfortable position. Two months with Social Distancing conditions, the Government of Indonesia has been preparing to roll back the sluggish economic wheel as a result of the implementation of Social Distancing. Therefore, the Indonesian people must live in peace with Covid-19 until the discovery of an effective vaccine. This condition is called new normal. This study designed a detection system of facial patterns using masks during the pandemic based on Real-Time Raspberry. The purpose of detecting face patterns by using a mask is to find out if there are masked faces in the image. Although it seems easy to do by humans, it turns out that this detection system is difficult to do without the help of a computer to process facial recognition because there are some difficulties related to location, point of view, light, and occlusion. This research has implemented a detection system using the Viola Jones method. Viola Jones method is a method to get fast, accurate and efficient results in face detection on images. This study using the Viola Jones method to adjust the threshold value, and form the Cascade Classifier in determining the face area in the image. This training can be evaluated the accuracy of the system by modifying the parameter values in the Viola Jones method so that this design can produce the highest accuracy for face images using masks and low accuracy for face images without using masks. From the results of trials with 100 face samples, the accuracy percentage is 90.9% and it takes a relatively short time to detect faces using a mask that is on average 15 seconds per sample tested.
Abstract Disaster mitigation studies with a geographical, social and cultural approach can be carried out on a system of place names known as toponymy. Toponomy generally has a relationship with the ...characteristics of the region. Sumberagung Village, located in Pracimantoro District, Wonogiri Regency, Central Java, has a unique character as a karst area. This study aims to analyze the toponymy of Sumberagung Village which is related to the spatial, social, and cultural context as a study of disaster mitigation in the region. The research method uses descriptive qualitative analysis with interview techniques, documentation and field surveys. The results of the study show that the Toponymy of Sumberagung Village contradicts the factual conditions of the environment. The name “Sumberagung” which means a large water source has the characteristics of an area that is prone to drought. The history of the name Sumberagung Village comes from deep contemplation, prayer and hope to find a large source of water that can be used in mitigating drought. The expectation of a large supply of water forces the community and the government to make efforts which are manifested as policies, tracing karts water sources that are below the surface, and providing water resources infrastructure. These efforts show that toponymy indirectly has a relationship with disaster mitigation in Sumberagung Village.
Abstract
Statistical Reasoning is the ability to understand information in daily life based on statistical data. This study aims to determine the ability of student statistical reasoning based on 5 ...levels of statistical reasoning models. The research subjects are two classes of first semester students majoring in Communication Sciences. The data collected is in the form of statistical reasoning test result. The data are categorized into five namely Level 1 (Idiosyncratic reasoning), level 2 (Verbal reasoning), level 3 (Transitional reasoning), level 4 (Procedural reasoning) and level 5 (Integrated process reasoning). Next, look at the percentage of student statistical reasoning included in the level 1, level 2, level 3, level 4 and level 5 categories. The results of data analysis showed that students level 3 with statistical reasoning were far more numerous than students’ statistical reasoning abilities categorized as than on the other.
In this paper, we present a sustainable electrical energy supply chain system (SEESCS) where two supply chain parties are involved, namely a power plant and a transmission station. The power plant ...has two different types of power generation systems. The first power generation system (PG1) is more costly but it generates lower emissions than the second system (PG2). The model is developed based on a lot-sizing inventory problem to decide the load allocation between PG1 and PG2. The objective function is to minimize total costs that consist of energy generation cost and emission cost. The transmission station faces a stochastic demand and employs a continuous review policy to manage the electrical energy storage. An efficient procedure is developed to solve the model and a sensitivity analysis is carried out to explore the impact of changes in some key parameters on the model's behavior. The results show that the allocation of electricity generation is mostly influenced by the change in PG1's production cost parameter and PG2's emissions parameters. The amount of emissions generated from the system is significantly affected by the variation in PG1's production cost parameter, PG2's emissions parameters, and electricity demand. Furthermore, by adjusting the power supply rate of power generation, the supply chain can control the overall emissions produced and maintain the total cost.
Abstract
Reflective thinking is an important ability that supports professional skills, the teacher is a professional position so that reflective thinking is important to be owned by prospective ...teacher. This study aims to identify the reflective thinking skills of prospective mathematics teachers. The research conducted is a descriptive study with a survey model. Data collection techniques used by the mathematical reflective thinking test. The study involved 30 prospective mathematics teachers. The results showed that more than half of students did not reach the reflection stage, only a small proportion of students had done critical thinking. The development of reflective learning is needed, so that reflective thinking can be developed effectively in learning.
Abstract
The Karst Landscape Region (KRL) Gombong is an area that has developed subterranean stream and provides abundant water resources, one of which is the Kalisirah Springs in Sikayu Village, ...Buayan District, Kebumen. The Kalisirah spring supports thousands of surrounding communities, especially for domestic needs, fisheries and agriculture. The karst area is an area that is sensitive to change so it is necessary to know the character of a developing subterranean stream system, so that groundwater resources can be maintained in terms of quality and quantity.
The method used is a tracing test with a qualitative and quantitative approach to obtain detailed information about the characteristics of the karst aquifer flow.
Release of trace substances is carried out in Goa Pucung and the fluorometer is placed in the Kalisirah Springs. Release on September 23, 2018 at 9.57 p.m and September 24, 2018 at 3.25 p.m. Fluorometer records an increase in fluorescent concentration. Connection of Goa Pucung-Kalisirah through 2 karst windows (Kalijeblosan and Kaliwinong) that are visible in plain view. The concentration of released tracer substances can be recovered 26.18% in the Kalisirah springs, with discharge recovery reaching 4493%, which indicates a divergence and convergence of the Kalisirah subterranean stream aquifer system. Flow volume from the subterranean stream system of Goa Pucung-Kalisirah reached 23,403,064.49 liters with an average residence time of 24.11 hours. The cross-sectional area is 12.19 m2 and the diameter of the Flow-Channel reaches 3.94 m, and with hydraulic depth from the Flow-Channel 3.09 meters.
The article reports results from the largest international dose survey in paediatric computed tomography (CT) in 32 countries and proposes international diagnostic reference levels (DRLs) in terms of ...computed tomography dose index (CTDI vol) and dose length product (DLP). It also assesses whether mean or median values of individual facilities should be used. A total of 6115 individual patient data were recorded among four age groups: <1 y, >1-5 y, >5-10 y and >10-15 y. CTDIw, CTDI vol and DLP from the CT console were recorded in dedicated forms together with patient data and technical parameters. Statistical analysis was performed, and international DRLs were established at rounded 75th percentile values of distribution of median values from all CT facilities. The study presents evidence in favour of using median rather than mean of patient dose indices as the representative of typical local dose in a facility, and for establishing DRLs as third quartile of median values. International DRLs were established for paediatric CT examinations for routine head, chest and abdomen in the four age groups. DRLs for CTDI vol are similar to the reference values from other published reports, with some differences for chest and abdomen CT. Higher variations were observed between DLP values, based on a survey of whole multi-phase exams. It may be noted that other studies in literature were based on single phase only. DRLs reported in this article can be used in countries without sufficient medical physics support to identify non-optimised practice. Recommendations to improve the accuracy and importance of future surveys are provided.
Abstract
Forest utilization through social forestry management within state forest areas is implemented to realize forest sustainability, community welfare, and environmental balance, and accommodate ...socio-cultural dynamics, requiring approval, recognition, and capacity building for the community. This study aims to analyze the potential of priority Non-Timber Forest Products (NTFPs) at the Siarsikarsik Village Forest Management Institute (LPHD), Pasar Lumban Julu Village, Lumban Julu District, Toba Regency. The research was conducted from August to September 2022 using primary and secondary data. The method used is to conduct a census of the LPHD management population. The data analysis technique uses the stages of reduction, presentation, verification, and conclusion. From the interview results, it was found that the priority NTFP potentials were honey, rattan, incense, sugar palm, and ornamental plants. The obstacle in NTFP management is the low level of human resources and institutional capacity. Capacity building is the main strategy in supporting the development of NTFP management.
This paper develops a mathematical model for supply chain inventory system of a manufacturer and a retailer under stochastic demand and carbon reduction policy. The objective of the model is to ...obtain the decisions regarding inventory management in supply chain system by minimizing the joint total cost. The model contributes to the current stochastic joint lot-sizing literature by allowing the investigation of the impact of carbon cap policy to inventory decisions. The carbon mainly emitted from several activities in the supply chain system, including the production, transportation and storage activities. The regulator, for example the government, uses a carbon cap policy to restrict the amount of emissions generated from the system. As we use strict carbon cap, the carbon emissions generated from the system must not exceed the carbon emission level set by regulator. A list of procedure is proposed to obtain the optimal solutions, which are ordering lot, safety factor, number of shipments and production rate. A numerical instance is provided to show the applicability of the model and to explore the impact of different levels of carbon cap on inventory decisions.
Coastal ecosystems are vulnerable to environmental degradation including the declining water quality in the coastal environment due to the influence of human activities where the river becomes one of ...the input channels. Some areas in the coastal regions of East Java directly facing the Madura Strait indicate having experienced the environmental degradation, especially regarding the water quality. This research was conducted in the coastal area of Probolinggo Regency, East Java, aiming to analyze the water quality as the basis for coastal rehabilitation planning. This study was carried out using survey and observation methods. Water quality measurement results were analyzed conforming to predetermined quality standards. The coastal area rehabilitation planning as a means to restore the degraded water quality parameters is presumably implemented through mangrove planting. Thus, the mangrove mapping was also devised in this research. Based on 40 sampling points, the results illustrate that according to the quality standard, the water quality in the study area is likely to be deteriorated. On account of the mapping analysis of mangrove distribution in the study area, the rehabilitation of the coastal zone can be done through planning the mangrove forest plantation. The recommended coastal area maintenance is a periodic water quality observation planning in the river region which is divided into three zones to monitor the impact of fluctuating changes in land use or human activities on the coastal water quality.
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