Arthropods biodiversity on a rice ecosystem plays an important role related to the pest management. This research aimed to investigate the diversity and community structure of arthropods in the rice ecosystem. It was conducted in Lembah Seulawah, Aceh Besar Regency, Indonesia from February to August 2016. Sweep net was used to collect insects on four rice plots at 35, 45 and 55 days after transplanting (DAT) as vegetative, transition and generative stages respectively. The result showed that the twenty-five morpho-species found at vegetative stage was the highest among the three stages. They were categorized as phytophagous insects, spiders, predatory insects, parasitoid, and neutral insects. Each arthropod's category the highest among the three stages was in the higher abundance at vegetative stage, except for phytophagous arthropod. The Shannon-Wiener diversity index (H') was significantly higher at vegetative stage than those at remaining stages, while Simpson Dominance (C) and Species Evenness (E) indices were not significantly different among the three observed stages.

Quantitative assessment of plant diseases can be done relatively quickly and practically, especially when applying digital image processing. This paper discusses digital image potential for assessing mosaic symptoms caused by the Tobacco mosaic virus (TMV). Chili plants (Capsicum annuum L.) were grown in pots and subjected to two treatments, i.e., non-inoculated (V0) and TMV inoculated (V1). Plant image recording using a Canon 750D camera with a kit lens was done once a week, starting when the mosaic symptoms are first visible, i.e., in the second-week post-inoculation. Recorded images in RAW format were first converted to TIFF, then subjected to further analysis using image processing applications, namely GIMP 2.8 and Fiji-ImageJ. Differences in the RGB profile of leaves given V0 and V1 treatment was observed. Non-inoculated leaves (V0) have a dark green color pattern, while TMV inoculated leaves (V1) tend to have a mixed color pattern of dark green and bright green. In general, this indicates a decrease in chloroplast’s ability to absorb light in diseased leaves, reducing the photosynthesis level. This preliminary experiment shows digital image processing’s potential for estimating the severity of mosaic disease with a high degree of accuracy and precision.

In the implementation of building construction projects in Aceh Province, faced with problems related to delays. The delay in the project has been a major contribution to the swelling of project costs. This study aims to identify the dominant time risk factors that occur during the implementation of building construction projects, as well as to analyze the relationship and influence between time risk factors to the cost of building construction projects in Aceh Province. This study uses qualitative methods through interviews and quantitative through the distribution of questionnaires. Resource persons and respondents addressed to the project manager of building contractor company with sub-field BG004 starting from qualification M1, M2, and B1. Based on the data of Construction Services Procurement Service (LPJK) Year 2017 the number of contractor companies obtained as many as 215 companies, using Slovin formula then the research sample obtained as many as 68 companies. The sampling technique used is purposive sampling. Data processing methods consist of validity test, and reliability, while data analysis consists of descriptive analysis, simple correlation and multiple linear regression through Statistical Product and Service Solution (SPSS) version 22 software. The results show that the dominant time risk factors that occur during implementation the building construction project in Aceh Province is a financial factor with a mean of 4.592. Equipment, environmental, labor, implementation, management, and political factors have a low correlation with Spearman coefficients of 0.224, 0.261, 0.274, 0.270, 0.366, and 0.228, while material, financial, criminal and project manager factors have a strong relationship low with Spearman coefficient of 0.199, 0.128, 0.042 and 0.148 to the cost of implementing the building construction project in Aceh Province. The effect of time risk factors on the cost of building construction projects in Aceh Province, which has significant effect is the material, equipment, finance, environment, labor, implementation, management, political, and project manager factors with tcount ttable and significance value 0.05.

Online Analytical Processing (OLAP) is increasingly being used by applying technology concepts that use a multidimensional view of grouping data to provide quick access to strategic information for analysis purposes. In the tourism industry, especially hospitality, this is very useful, especially in processing hotel operational data. Although OLAP technology has been widely applied in the hotel industry in reporting business sales, marketing, and reporting management analysis, there is still little research that discusses customer activity analysis. This study develops an OLAP-based analytical CRM system to analyze customer data and classify it into two main segments: geographically and demographically. Transactional data for hotels that have existed for the last three years are converted into a data warehouse, including the ETL process from the original database to a star schema database. It has a fact table and dimensions. Furthermore, OLAP cube operations are performed and generate customer reports. Testing in this study was carried out by calculating the total data’s access speed and accuracy from 100 to 5000 customers, and the estimated value was 45.50 to 80 milliseconds in 30 experiments. For further research, it can be developed by integrating data from the hotel transactional system so that the analytical process can run in real-time.

A B S T R A C TThis study was experimental, conducted using a Completely Randomized Design (CRD) with 3 x 2 factorial design, and four repli cates have been carried out to evaluate the protease and amylase activities of Anguilla bicolor McClelland. A total of 71 individuals divided into three weight groups were used in this study. The first group with an average weight of 41.25 ± 0.898 g consisted of 51 eels, the second with an average weight of 319.8 ± 4.666 g composed of 14 eels, and the third with a mean weight of 569.5 ± 9.150 g consisted of 6 eels. The results showed the protease activity differed significantly based on eel size and intestinal segment (P ˂ 0.05). This res earch recorded the highest protease activity was in eels within the smallest weight group (41.25 ± 0.898 g). This study also revealed the protease activity in the anterior intestine was higher than the posterior in all size of eels. The amylase activity did not differ significantly (P > 0.05) by eel size and intestinal segment. This study concluded the protein digestion capacity of smaller eels was higher than larger eels, and the protein digestion capacity was greater in the anterior intestine than the posterior intestine. The carbohydrate absorption ca pacity in eel was not affected by the variety of fish size which indicates no change in the feed category.