Judul: The Characteristics of the Sound Wave Velocity and its Relation to Production of Pine Resin and Anatomy Tapping
Abstrak: Getah pohon pinus merupakan hasil hutan yang sangat penting dan mempunyai nilai ekonomi yang tinggi. Berbagai metode penyadapan yang berkembang bertujuan untuk meningkatkan produksi getah. Pengujian dengan menggunakan metode non-destruktif testing (NDT) berbasis gelombang suara biasa digunakan untuk menduga kondisi internal dalam mengevaluasi kualitas pohon di lapangan. Penelitian ini bertujuan untuk mengevaluasi karakteristik kecepatan rambatan gelombang suara pada kayu pinus sadapan dan kaitannya dengan produksi getah berdasarkan penyebaran jumlah dan diameter saluran resin. Penelitian ini dilakukan pada tegakan pinus sebanyak 72 pohon yang terdiri atas 36 pohon disadap, dan 36 pohon lainnya disadap dengan penambahan stimulansia. Alat yang digunakan adalah SylvatestDuo untuk mengukur kecepatan gelombang suara, kadukul untuk penyadapan dengan metode quarre atau koakan dan bor riap untuk pengambilan sampel anatomi., Resin form pine trees are important forest products that have a high economic value. Various tapping methods have been developed to improve productivity of the pine resin. On the other hand, the method of non-destructive testing (NDT) based on sound wave propagation have been known and used widely to estimate internal quality of wood and can be used since in-situ evaluation of standing trees. The aim of this study was to evaluate the characteristics of the sound wave velocity in relation to pine resin productivity as well as the anatomical properties of frequency and diameter intercellular of resin. The research was conducted on 72 pine trees consisted of 36 trees which were tapped by the quarre method and 36 other trees were tapped by the quarre method plus giving the chemical stimulants. The main equipment used were NDT tool of Sylvatest-Duo, "kadukul" for tapping in quarre method, and increment borer to take anatomy sample.
Keyword: Pinus merkusii, NDT, sound wave velocity, resin tapping

Judul: Characteristics of Pine Stands (Pinus merkusii Jungh. et de Vriese) Resin Production in KPH Pati
Abstrak: Getah pinus memiliki nilai ekonomi yang tinggi dan potensial untuk dibudidayakan. Pengusahaan getah pinus oleh KPH Pati tidak lepas dari informasi yang menunjang peningkatan produktivitas getah. Tujuan penelitian ini mengidentifikasi karakteristik tegakan pinus (Pinus merkusii Jungh. et de Vriese) penghasil getah di KPH Pati. Pemilihan pohon contoh dilakukan dengan metode purposive sampling. Pengamatan kondisi lingkungan dilakukan dengan metode deskriptif berupa observasi dan dokumentasi. Rata-rata produktivitas getah pinus pada anak petak 36E dan 70A sebesar 0,716 kg/bulan/pohon dan 1,320 kg/bulan/pohon. Pohon pinus pada anak petak 36E memiliki diameter batang kecil, sedangkan pohon pinus pada anak petak 70A memiliki diameter batang besar. Peubah diameter setinggi dada, tinggi total, jumlah bidang sadap, tinggi bidang sadap, kedalaman bidang sadap, dan ketinggian tempat tumbuh memiliki tingkat keeratan hubungan sangat lemah terhadap produktivitas getah. Kerapatan tegakan pada anak petak 36E tinggi sedangkan kerapatan tegakan pada anak petak 70A jarang. Getah pinus yang tertampung pada wadah penampung getah terlihat tercampur dengan air dan kotoran., Pine resin has a high economic value and potential to be cultivated. Pine resin business by KPH Pati cannot be separated from information that supports the increase in resin productivity. The goal of this study to identify the characteristics of pine stands (Pinus merkusii Jungh. et de Vriese) resin producing in KPH Pati. The selection of sample trees was carried out by purposive sampling method. Observation of environmental conditions is carried out by descriptive methods are observation and documentation. The average pine resin productivity in anak petak 36E and 70A was 0,716 kg/month/tree and 1,320 kg/month/tree. The pine trees in anak petak 36E have a small diameter, while the pine trees in anak petak 70A have a large diameter. The diameter, total height, number of tapping fields, height of the tapping field, depth of field of tapping, and height of the growing place have a very weak level of closeness to resin productivity. The density of stands in anak petak 36E is high, while the density of stands in anak petak 70A is rare. Pine resin that is accommodated in a resin-holding container looks mixed with water and dirt.
Keyword: Descriptive, Purposive Sampling, Resin Productivity

Judul: Query Expansion based on Bilingual Dictionary Using Conditional Probability
Abstrak: Query expansion is a technique that can be used to bridge vocabulary gaps between queries and documents in the collection. With query expansion, user will be helped to formulate queries well so that user will optimize the search result. In this study, the expansion term was resulted from the translation of bilingual dictionary. Subsequently, several terms of expansion were elected based on the closeness of its relationship with the original query. This research showed that conditional probability can be used to select expansion term in bilingual translation method query expansion. The result of 1000 documents was more than 97% relevan document can be retrieved by this system. The more expansion term used, the larger number relevan document was retrieved.
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