Polarization of perception and motivation in ecotourism development based on sustainable peat ecosystem utilization

Tourism development in Indonesia is currently one of the alternatives in the national program as an effort to economic growth. The study’s objectives are (1) analyzing the perception and motivation values of the stakeholder community; (2) developing a strategy to optimize the development of sustainable peat ecosystem ecotourism. The research result shows that the polarization of perception and motivation of the community and stakeholders expressed a positive attitude towards the ecotourism development in the values of 6-7. The value shows a positive attitude between the community and stakeholders. The motivational value of both actors illustrates an optimistic attitude in the ecotourism development with a value between 6-7. The results of the matrix calculation of internal and external factors produce X coordinates of 0.50 and Y – 0.50 on the strategy quadrant diagram. The strategy is Weakness-Opportunity which is a strategy that minimizes weaknesses and takes advantage of existing opportunities. Strategic formulation, namely: (1) building and strengthening institutional systems; (2) improving the welfare of the community by opening business opportunities; (3) developing infrastructure and tourism support facilities; and (4) targeting marketing programs. The research benefit is that it can be used as one of the basis in drawing up a plan to optimize the utilization of peat ecosystems sustainably. It also can improve local communities’ attitudes of concern, awareness, and welfare.

ANALISIS KESALAHAN MENYELESAIKAN SOAL MATEMATIKA DALAM MATERI MATRIKS PADA SISWA KELAS XI IPS SMA NEGERI 1 ENDE

This study aims to determine: (1) mistakes have been made by the XI IPS grade students of SMA Negeri 1 Ende in solving matrix questions. (2) the factors that cause the XI IPS grade students of SMA Negeri 1 Ende in solving the matrix problem. (3) the efforts to solve students' errors in solving matrix questions in class XI IPS SMA Negeri 1 Ende. This study used a qualitative research approach using triangulation of sources and triangulation of techniques. The research subjects were 15 students of class XI IPS 3. The consideration of subject taking is based on the results of the error analysis according to the Newmann procedure. Methods of data collection using diagnostic tests, interviews, and documentation. The results of the research are: (1) the types of student errors are errors in understanding the concept of matrix count operations, process errors in solving matrix problems, and errors in concluding. 2) the factors that cause student errors are, students, choose the wrong formula, are not careful in solving matrix calculation operation problems, students are afraid to ask the teacher, and students' assumptions that mathematics is complicated, causing errors in determining the final answer. 3) while the efforts made were learning using rainbow matrix media which proved to be effective in learning matrix count operations.

Calculation of Collision Probability Matrix of Nuclear Fuel Cell as a Function of Neutron Energy Group Using Flat Flux Model

One of the methods that widely used in solving neutron transport equations in the nuclear fuel cell is the collision probability (CP) method. The neutron transport is very important to solve because the neutron distribution is related to the reactor power distribution. The important thing in the CP method is the CP matrix calculation, better known as has an important role in determining the neutron flux distribution in the reactor core. This study uses a linear flat flux model in each cell region for each energy group with white boundary condition. Although the type of reactor used in this study is a fast reactor, the matrix calculation still carried out in fast and thermal group energy. The matrix depends on the number of mesh in each cell region. The matrix formed from the mesh distribution will produce a matrix for each energy group. Because the boundary condition of the system is assumed that there are no contributions neutron source from the outside, the sum of the matrix must be less than one. In general, the results of the calculations in this study are following the theory

Analysis of implementations of the Scarpi method for calculating high orders Hadamard matrices of symmetric structures

An analysis of three modifications of the Scarpi method is given in order to assess their applicability to calculating Hadamard matrices of high orders with structural symmetries. Descriptions of modifications are presented, the results of Hadamard matrix calculation are demonstrated, confirming the conclusion about the significance of the Balonin-Seberry modification. The computational experiment shows that there are no results refuting the existence of matrices symmetric structures calculated by the Balonin-Seberry modification.

THE DECISION MATRIX OF THE MOST EFFICIENT ENERGY UTILIZATION FOR COLD STORAGE AT PULAU MOROTAI REGENCY

<p>Pulau Morotai Regency is one of the areas identified by the government as a fisheries-focused Special Economic Zone. However, the reality on the ground is that the fishing industry has only one cold storage facility. One of the factors is the region's remote position, which requires a considerable amount of capital and operational expenditure. Lower energy costs are one way to reduce the operating cost. This study aims to determine the value of each energy-efficient criterion and to know the most efficient energy composition implemented for Cold Storage in Morotai. This study uses the decision matrix approach to compare the operating costs of cold storage with a capacity of 200 tons over 20 years with three possible alternatives: PLN electricity, hybrid electricity (PLN + photovoltaic), and fully photovoltaic energy. With a score of 38 in the decision matrix table, the outcome of the decision matrix calculation indicates that cold storage with a photovoltaic system is much superior.</p>

CPU AND GPU PERFORMANCE ANALYSIS ON 2D MATRIX OPERATION

GPU or Graphic Processing Unit can be used on many platforms in general GPUs are used for rendering graphics but now GPUs are general purpose parallel processors with support for easily accessible programming interfaces and industry standard languages such as C, Python and Fortran. In this study, the authors will compare CPU and GPU for completing some matrix calculation. To compare between CPU and GPU, the authors have done some testing to observe the use of Processing Unit, memory and computing time to complete matrix calculations by changing matrix sizes and dimensions. The results of tests that have been done shows asynchronous GPU is faster than sequential. Furthermore, thread for GPU needs to be adjusted to achieve efficiency in GPU load.

Sistema de Criptografía Simétrico para la Enseñanza de las Matrices Inversas Modulares

El presente artículo describe la enseñanza de las matrices inversas modulares usando el algoritmo de criptografía simétrica Hill Cipher y su implementación en dispositivos móviles con Sistema operativo Android. El proceso de descifrado en el algoritmo Hill Cipher involucra el cálculo de matrices inversas modulares. El objetivo de este trabajo es la enseñanza del cálculo necesario para la obtención de matrices inversas modulares a estudiantes de licenciatura en las áreas de las ciencias computacionales a través del proceso de descifrado en la criptografía simétrica. Se realizó un experimento con dos grupos de estudiantes, el grupo experimental y el grupo de control. Se aplicó una prueba en ambos grupos para determinar el aprendizaje de los estudiantes. Un análisis comparativo entre ambos grupos muestra un incremento en el desempeño del grupo experimental en el cálculo de las matrices inversas modulares. This article describes the teaching of modular inverse matrices with the symmetric cryptographic algorithm Hill Cipher and its implementation on mobile devices with Android Operative System. The decryption in the Hill Cipher algorithm involves the calculus of modular inverse matrices. The goal of this paper is the teaching of modular inverse matrix calculation to undergraduate students of Computer Sciences through the decryption in symmetric cryptography. An experiment was conducted on two groups of students, the control and the experimental groups. To measure student learning, a test was applied to both groups. Comparison of control and experimental groups results show an increase in student performance for the calculation of modular inverse matrices.