Forest Regeneration Under Reduced- Impact and Conventional Logging in Lowland Mixed Dipterocarps Forest of East Kalimantan, Indonesia

The lowland rain forests of the Bulungan Research Forest (now called as Malinau Research Forest) are important for their high species richness which constitutes a portion of the remaining frontier forest in Asia. Lowland dipterocarp forest is the most extensive forest type in the area. Trees may reach up to 35-40 m height. Dominant species with diameter are those of the Dipterocarpaceae family. The commercial timber species in the area is Shorea spp, Dipterocarpus spp, Hopea spp and Vatica spp. Agathis boomeensis is also another commercial species. It is the unique timber representative of the family Araucariaceae in the lowland and hill mixed dipterocarp forest of Borneo. Reduced-Impact Logging (RIL) trial has been carried out in the compartment of operational scale (over 100 ha). Twenty four permanents sample plots (PSPs), of one ha each have been randomly set up for a long term monitoring. All trees (dbh 20 cm) were measured and identified.The objective of study was to observe how far RIL can reduce logging damage as compared to conventional logging which was done in state-owned company, PT Inhutani II, East Kalimantan. Residual stand damage were calculated to be compared with initial density. In conventional logging, the damage which was created in diameter class of 20-50 cm dbh versus felling intensity were recorded as amounting 27% (in low logging intensity), 22% (medium), and 27% (high) from initial density. Meanwhile in diameter class above 50 cm dbh were 3.9% (low) and 6% (both medium and high). In contrast, in reduced-impact logging, residual stand damage in diameter class of 20-50 cm dbh were 10% (low), 20% (medium) and 29%(high). Meanwhile, in diameter class above 50 cm dbh were only 1 %(low), 3% (medium) and 6% (high). In line with those activities also to do monitoring PSPs, as well as to examine the stand structure and status of species composition of logged over forest under reduced impact and conventional logging. The study showed the overall density of saplings of approximately 4,600 stems/ha, which is mainly composed of two families, Euphorbiaceae and Dipterocarpaceae. Euphorbiaceae particularly dominated this storey. A total of 705 trees species were recorded from the permanent sample plots, of which 70 trees (9.29%) were dipterocarp species. Among the distributed dipterocarps species are Dipterocarpus lowii, D. stellatus, Shorea beccariana, S. brunescens, S. exelliptica, S. Macroptera, S. Maxwelliana, S. multiflora, S. parvifolia, S. rubra and S. venulosa. In this study, residual stand damage due to reduced impact and conventional logging with different logging intensity were also be demonstrated

ANALISA PENGENDALIAN KUALITAS RESIN ABC MENGGUNAKAN SIX SIGMA DI PT. PARDIC JAYA CHEMICALS

Perkembangan teknologi di dunia bisnis dan perdagangan membuat persaingan menjadi ketat dan tajam. Dalam usahanya untuk memenuhi   kepuasan konsumen   yang makin tinggi, maka perusahaan harus dapat menentukan faktor kualitas yang diminta oleh konsumen, selain faktor harga, design, dan faktor lainnya.Salah satu metode yang dapat dilakukan perusahaan untuk selalu meningkatkan kualitas produksi adalah dengan menggunakan metode Six Sigma. Six Sigma merupakan pengendalian kualitas yang targetnya yaitu 3,4 DPMO atau  3,4 cacat per sejuta kesempatan. Dengan adanya target six sigma yang 3,4 DPMO maka dapat dikatakan realitas untuk dapat dicapai dari pengendalian kualitas yang berdasar pada zero defect. Pengendalian kualitas yang dipakai dalam penelitian   ini menggunakan pendekatan six sigma dengan metodologi DMAIC (Define, Measure, Analyze, Improve, Control), yang dilakukan di tiap proses produksi tetapi sebelum melaksanakan pengendalian kualitas dengan metode sixsigmaperlu adanya rencana agar pelaksanaan   six sigma dapat sukses diterapkan. Pengen- dalian kualitas dibutuhkan PT. Pardic Jaya Chemicals untuk tetap menjaga proses produksi menjadi aliran proses yang kuat dan handal sehingga  pencapaian level sigma sebesar 3,46 dan DPMO sebesar 25514,4 dapat lebih ditingkatkan serta tidak ada lagi hasil produksi yang cacat atau dengan kata lain tidak ada lagi kerugian bagi perusahaan karena produk cacat. Kata  Kunci:Teknologi,  Six  Sigma,  DPMO,Zero  Defect,  DMAIC(Define,  Measure,  Analyze, Improve, Control

Multi-Agent Simulation of Alternative Scenarios of Collaborative Forest Management

International calls for sustainable development advocate that forest management should be carried out in a multi-stakeholder environment. The importance of community participation is acknowledged in the Indonesian Act No. 41 on Forestry (1999). However, it is not clear how to achieve this in areas already allocated to a concession holder. Current regulations offer little flexibility for concessionaires to develop site-specific management, or to involve local communities in forest management. The research reported here examines the application of simulation techniques to explore scenarios of sustainable forest management addressing those limitations. Several scenarios have been developed using multi-agent simulation to examine social and biophysical issues. Of the four scenarios examined in this study, collaborative forest management involving both the concessionaire and the local community appears to offer the most promising pathway toward sustainabilit

Cloud Computing Based Computing System for Women's Higher Education in Isolated Areas

A new chapter in information technology is opened by cloud computing in computer science and engineering education. Understanding the importance of using cloud computing (CC) in institutions of higher learning is the aim of this research. This analysis shows some of the benefits that cloud computing can provide to higher education, assesses some of the most significant challenges that academics may encounter as a result of its implementation, and suggests some initial steps toward its adoption while mitigating the risks associated. Enterprise apps have migrated in large numbers to the cloud in recent years. One of the challenges posed by cloud applications is the challenge of allocating resources to the application to ensure a service level along dimensions like performance, availability, and dependability. To do this, a system based on the infrastructure of governmental bodies, non-governmental organisations (NGOs), academic institutions, and other providers of social services has been established. The results of this analysis demonstrate that it is possible to use a few variables, including administrative bodies and governments, internal stakeholders, cloud suppliers, firm attributes, socio-political changes, IT framework, and others, to understand how CC adoption methodologies are used in higher education institutions. In addition to providing insight into how cloud providers, advisers, governments, and academics see various market demands and how they respond to these expectations while expanding services provided by CC in higher education institutions, this analysis opens opportunities for future research. The implications for practice can aid decision-makers in utilizing CC services legally

Consistent patterns of common species across tropical tree communities

Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations1,2,3,4,5,6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth’s 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world’s most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.Publisher PDFPeer reviewe