cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Agung Nugroho
Contact Email
jmfs@lppm.itb.ac.id
Phone
+6222-86010051
Journal Mail Official
jmfs@lppm.itb.ac.id
Editorial Address
ITB Journal Publisher, LPPM ITB, Center for Research and Community Services (CRCS) Building 6th & 7th Floor , Jl. Ganesha No. 10 Bandung 40132, Indonesia
Location
Kota bandung,
Jawa barat
INDONESIA
Journal of Mathematical and Fundamental Sciences
Published by Institut Teknologi Bandung
ISSN : 23375760     EISSN : 23385510     DOI : https://doi.org/10.5614/j.math.fund.sci.
Core Subject : Science, Education,
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics
Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health, Medical, Pharmacy), Mathematics, Physics, and Statistics.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 689 Documents
 35   36   37   38   39 
Effect of B-doping on the Crystal Structural and Optical Properties of Zinc Oxide Thin Films for Photonic Devices Fery Adriyanto; Usman Santosa; Riyatun Riyatun; Wilson W. Wenas
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 1 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. Effect of B-doping B2H6 on the crystal structural and optical properties of zinc oxide (ZnO) thin films has been studied. The crystal orientation of these films were evaluated  by X-ray diffraction. It was found that the (110) reflection peak was dominant for all the film and became less pronounced as B2H6 flow rate was increased. The grain size of thin film decreased as B2H6 flow rate was increased. The transmittance in the ultraviolet  wavelengths region shifted to higher energy as the B2H6 flow rate was increased. I t was also found that refractive index of ZnO thin films increased as the B2H6 flow rate was further increased. These doping effects should be minimized  in order to grow low resistivity ZnO film with excellent optical properties for application to photonic devices. Efek Doping Boron (B) terhadap Struktur Kristal dan Sifat Optik Lapisan Tipis ZnO untuk Divais OptoelektronikSari. Telah dilakukan studi tentang pengaruh doping B2H6 terhadap struktur Kristal dan sifat optic lapisan tipis ZnO. Orientasi kristal lapisan tipisnya dievaluasi dengan difraksi sinar-x. Diperoleh bahwa puncak refleksi (110) mendominasi seluruh film dan berkurang sejalan dengan penambahan laju aliran B2H6. Ukuran butir Kristal dari film juga berkurang sejalan dengan penambahan laju aliran B2H6. Transmitnasi pada daerah panjang gelombang ultra violer bergeser ke arah energy yang lebih tinggi sejalan dengan penambahan laju aliran B2H6. Ditemukan pula bahwa indeks bias lapisan tipis ZnO bertambah sejalan dengan penambahan laju aliran B2H6. Efek-efek doping tersebut harus diminimalkan agar dapat diperoleh lapisan ZnO beresistivitas rendah dengan sifat optik yang baik untuk aplikasi pada divais fotonik. 
Simulation and Fabrication of Double Barrier Structure of P-I-N Amorphous Silicon (a-Si) Device Ida Hamidah; Kardiawarman Kardiawarman; Budi Mulyanti; Andi Suhandi
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 1 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. The application of double barrier (DB) structure in p-i-n amorphous silicon (a-Si) device was studied. The theoretical study was done to obtain device parameters such as tunneling probability and current density. The tunneling probability was calculated by employing the Schroedinger equation, WKB approximation and Green function. Width of potential well, width and height of barrier were varied to obtain the highest tunneling probability value. The current density was contributed by diffusion, and tunneling current densities. It was found that current density had a peak of 3950 A/m2 at 0.56 volt forward bias. Furthermore, the fabrication of p-i-n a-Si device with double barrier structure was successfully carried out. To realize the double barrier structure, optimization of optical band gap of barrier a-SiC:H was done by varying ratio of CH4 to [CH4+SiH4]. The fabrication of p-i-n a-Si device was then done by using Plasma Enhanced Chemical Vapor Deposition (PECVD) technique with a structure of glass substrate/TCO/p-a-Si:H (2.15 eV;140Ã…)/i-a-Si:H (1.81 eV;1800 Ã…)/barrier a-SiC:H (2.36 eV;45 Ã…)/potential well i-a-Si:H (1/81 eV; 30 Ã…)/barrier a-SiC:H (2.36 eV; 45 Ã…)/n-a-Si:H (1.81 eV;180 Ã…)/Al. The I-V characteristic of the device showed a peak current calue at 0.55 forward bias. Simulasi dan Fabrikasi Struktur Double Barrier pada Divais Amorphous SiliconSari. Aplikasi struktur double barrier (DB) pada divais amorphous silicon (a-Si) telah dilakukan untuk memperoleh beberapa parameter divais seperti probabilitas tunneling dan rapat arus. Probabilitas tunneling dihitung dengan menerapkan persamaan Schroedinger, pendekatan WKB dan fungsi Green. Lebar sumur potensial, lebar dan tinggi barrier telah divariasikan untuk memperoleh harga probabilitas tunneling yang maksimum. Rapat arus total dari divais dalam perhitungan ini merupakan jumlah dari rapat arus difusi dan rapat arus tunneling. Diperoleh bahwa rapat arus total memiliki nilai maksimum sebesar 3950 A/m2 pada tegangan bias maju 0,56 volt. Selanjutnya, telah berhasil juga difabrikasi divais p-i-n a-Si dengan struktur double barrier. Didapatkan bahwa karakteristik I-V dari divais menunjukkan adanya puncak rapat arus pada tegangan bias maju 0,55 volt.ihamidah@eudoramail.com
A Study of Quantum dots of GaSb M. Barmawi; Sugianto Sugianto; R.A. Sani; Euis Sustini; P. Arifin; M. Budiman
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 1 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. Quantum Dots is a nano structured materials, which is an interesting object for fundamental study as well as for applications. Quantum Dots has been used for optoelectronic devices, such as fast detectors and for lasers. In this paper we report preliminary results of the preparation of quantum dots of GaSb in our laboratory. These dots are prepared by self-organized growth by MOCVD, using Trymethylgalium and Tridismethylaminoantimonat  as metal organic sources and using GaAs as substrate. The results are studied by Scanning Electron Microscope. We propose further characterization of these quantum dots. Studi Mengenai Titik Kuantum GaSbSari. Quantum Dot adalah material yang mempunyai struktur nano, yang merupakan objek untuk penelitian fundamental maupun untuk penerapannya. Dalam makalah ini dilaporakan hasil-hasil yang pertama yang kita peroleh dalam pembuatan Quantum Dot dari GaSb dalam laboratorium kami. Quantum Dot ini telah ditumbuhkan dengan menggunakan penumbuhan yang "selforganized" dengan reactor MOCVD dengan mempergunakan Trimetilgalium dan Trisdismetilantimonat sebagai sumber-sumber metalorganic dan GaAs digunakan sebagai substrat. Hasilnya ditelaah dengan menggunakan SEM. Telat disarankan karakterisasi lanjutan yang harus dilakukan. 
MOCVD Growth of GaSb and Al GaSb E. Sustini; Sugianto Sugianto; P. Arifin; M. Barmawi
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 1 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. GaSb and Al GaSb are narrow gap semiconductors, is of current interest, for its optoelectronic application in the near and medium infra-red region. The large ratio of the ionization coefficient of hole and electrons is key factor for high speed and low noise in APD. In this paper we report the frowth of GaSb and AlGaSb in a home made vertical MOCVD reactor using trymethylgalium (TMGa), trymethylalumunium (TMAl) and tridismethylaminiantimonat (TDMASb) as metalorganic sources. In the reactor we used a flow guide to obtain uniform layers. The effect of growth temperature and the V/III ratio on the structural properties, surface morphology, optical and electronic properties is presented. Penumbuhan GaSb dan AlGaSb dengan MOCVDSari. GaSb dam AlGaSb adalah semikonduktor paduan yang mempunyai selah energi yang sempit, dewasa ini sangat menarik mengingat penerapannya dalam optoelektronika di daerah inframerah yang dekat dan yang menengah. Perbandingan dari koefisien ionisasi dari lubang dan electron merupakan faktor yang menentukan dalam APD yang mempunyai respons yang cepat dan derau yang rendah. Dalam tulisan ini penulis melaporkan penumbujan dari GaSb dan AiGaSb dalam reactor MOCVD yang vertikal yang telah dibangun sendiri dengan menggunakan trimetilgalium (TMGa), trimetilaluminium (TMAI) dan trisdismetilaminoantimonat sebagai sumber-sumber metal-organik. Reaktor tersebut mempergunakan pemandu aliran untuk memperoleh lapisan dengan ketebalan yang uniform. Disini disajikan pengaruh dari temperature penumbuhan dan perbandingan V/III pada sifat-sifat struktur, morfologi permukaan, sifat-sifat optic dan sifat-sifat listriknya.
Epitaxy of GaN Film by Hydrogen Plasma Assisted MOCVD Sugianto Sugianto; A. Subagio; Erzam Erzam; R.A. Sani; M. Budiman; P. Arifin; M. Barmawi
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 1 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. We have studied the effect of hydrogen plasma on GaN film, grown by plasma-assisted metalorganic chemical vapor deposition (MOCVD). GaN films grown on a sapphire (0001) without the buffer layer have a polycrystalline structure. While films grown using the buffer layer tends to have a single crystal orientation. We have tried to increase the growth rate by varying the TMGa:N ratio. We found that the growth rate of the films were 450 nm/h with TMGa:N ratio of 1:600. However the films show a polycrystalline structure. Using hydrogen plasma during the growth, we have shown by XRD analysis that the films structure was highly oriented in (0002) plane  parallel to substrate and the crystalline quality is improved. Epitaksi Film GaN dengan MOCVD Berbatuan Plasma HidrogenSari. Telah dipelajari efek dari plasma hydrogen pada film Gan, yang ditumbuhkan dengan MOCVD yang dibantu dengan plasma. Film GaN ditumbuhkan di atas safir (0001) tanpa bantuan lapisan penyangga mempunyai struktur polikristalin. Sedangkan film yang ditumbuhkan dengan bantuan lapisan penyangga mempunyai kecenderungan membentuk Kristal dengan orientasi tunggal. Telah dicoba untuk menaikkan kecepatan pertumbuhan Kristal dengan mengubah-ubah perbandingan TMGa:N. Telah diperoleh kecepatan pertumbuhannya menjadi 450nm/jam bila perbandingan tersebut 1:600, akan tetapi strukturnya memperlihatkan sifat polikristal. Dengan bantuan plasma hidrogen analisis XRD menunjukkan bahwa orientasi film sejajar dengan arah (0002) dan sifat kristalnya dapat diperbaiki.
A Sequential Isolation and Isolate Identification of Thermophilic Oil Degrading Bacteria from Bangko Reservoir Megga Ratnasari Pikoli; Pingkan Aditiawati; Dea Indriani Astuti
Journal of Mathematical and Fundamental Sciences Vol. 32 No. 2 (2000)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sari. Telah dilakukan isolari bakteri termofilik pendegradasi minyak bumi dari Sumur Bangko dengan cara bertahap karena prosedur isolasi biasanya belum tentu dapat mengisolasi bakteri pendegradasi secara lengkap. Isolasi tahap I dilakukan langsung dari crude oil di dalam medium basal Stone Mineral Salt Solution ditambah ekstrak ragi (SMSSe) pada 50 °C. Isolasi tahap II dan III dilakukan dari sumber isolat yang sama, medium basal dan kondisi kultur yang sama, tetapi medium pengisolasi diperkaya dengan minyak sisa degradasi (MSD) isolat campuran tahap sebelumnya. Pada tahap I diperoleh 4 isolat, yaitu Bacillus polynyxa, B. licheniformis, Bacilus sp.1, dan Pseudomonas aeruginosa; pada tahap II diperoleh 3 isolat, yaitu Bacillus sp.2, B. stearothermophllus, dan B. brevis; sedangkan pada tahap III hanya diperoleh 1 isolat, yaitu B. coagulans. Semua isolat ini nantinya digunakan untuk mendegradasi crude oil. A Sequential Isolation and Isolate Identification of Thermophilic Oil Degrading Bacteria from Bangko ReservoirAbstract. A study on the isolation of thermophilic oil-degrading bacteria from the crude oil (petroleum) of Banko reservoir has been conducted on a sequential way. The conventional isolation procedure did not isolate the bacteria completely. The first isolation stage was performed directly on the crude oil sample by using Stone Mineral Salt Solution plus yeast extract (SMSSe), as basal medium, at 50°C. The second and third isolation stages used the same source, basal medium, and condition as the first stage, but were enriched with a depleted-oil obtained from the crude oil degraded from the previous stage's mixed culture bacteria. Four bacterial isolates were recovered from the first isolation stage, identified as Bacillus polymyxa, B. Licheniformis, Bacillus sp.1, and Pseudomonas aeruginosa. The second stage gave another three different bacterial isolates, identified as Bacillus sp.2, B. stearothermophillus, and B. brevis; whereas the third stage gave only one isolate namely Bacillus coagulans. These isolates could be applied for the degradation of crude oil.
Study on the Making of Blended Cement by Mixing Granulated Blast Furnace Slag with Portland Cement Clinker Arief Sudarsono; Kris M. Kosasih
Journal of Mathematical and Fundamental Sciences Vol. 32 No. 2 (2000)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. This paper presents the results of laboratory into the effect of slag fineness and slag composition added to portland cement clinker, to the compressive strength of the paste. The results showed that slag of 4260 cm2/gram fineness can be added up to 3O% to a portland cement clinker to increase compressive strength from 28 MPa to about 40 MPa. Scanning electron micrograph of the pastes showed that the inter granular voids between slag particles and sand particles were densely filled with line CaO-SiO2-H2O gel after 28 days observation, and in case clinker without slag, densification of CaO-SiO2-H2O gel still left pores even after 23 days of observation. The fineness of slag is more important than its composition in the blended cement. Studi Pembuatan Semen Campur (Blended Cement) dari Campuran Terak Tanur Tiup dan Klinker Semen PortlandSari. Paper ini menyajikan hasil percobaan laboratorium yang meneliti pengeruh kehalusan terak dan komposisi terak yang ditambahkan ke dalam klinker semen Portland. Hasil percobaan menunjukkan bahwa terak dengan kehalusan 4260 cm2/gram dapat ditambahkan ke dalam klinker sampai maksimum 30%, untuk meningkatkan kuat tekan dari semula 28 Mpa menjadi 40 Mpa. Foro SEM menunjukkan bahwa kekosongan antarbutir partikel terak dengan partikel pasir terisi dengan baik oleh pasta halus CaO-SiO2-H2O setelah pengamatan selama 28 hari. Untuk klinker tanpa terak, pasta masih mempunyai pori mesipun setelah 28 hari pengamatan. Kehalusan terak lebih penting daripada komposisinya di dalam semen campur.
Artelastokromen Suatu Diprenilpiranoflavon dan B-Resorsilaldehid dari Kayu Batang Artocarpus Lanceifolius Didin Mujahidin; Sjamsul Arifin Achmad; Yana Maolana Syah; Euis Holisotan Hakim; Lukman Makmur; Norio Aimi; Mariko Kitajima; Hiromitsu Takayama; Rusjdi Tamin
Journal of Mathematical and Fundamental Sciences Vol. 32 No. 2 (2000)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak. Dua senyawa, yaitu artelactokromen (1), suatu diprenil piranoflavon, dan B-resorsilaldehid (2) telah ditemukan untuk pertama kalinya pada kayu batang tumbuhan Artocarpus lanceifolius Roxb. (Moraceae), suatu tumbuhan langka yang endemic untuk Indonesia dan dikenal dengan nama Keledang. Struktur molekul kedua senyawa tersebut telah ditetapkan berdasarkan data fisika dan spektroskopi (MS, 1H dan 13C NMR). Baik artelastokromen (1) maupun B-resorsilaldehid (2) tidak terlalu toksik terhadap nauplii udang Artemia salina Leach., masing-masing dengan LC50 298,2 dan 79,7 ug/mL. Artelastochromene a Diprenylphyranoflavone and Î’-Resorcylaldehyde from the Wood Trunk of Artocarpus LanceifoliusAbstract. Two phenolic constituent, namely artelastochromene (1), a diprenyl pyranoflavone, and β-resorcylaldehyde (2) had been isolated from the wood trunk of Artocarpus lanceifolius Roxb. (Moraceae), an endemic species of Indonesia, locally known as Keledang. The structures of both compounds were elucidated based on physical and spectroscopic data (MS, 1H and 13C NMR). Both artelastochromene (1) and β-resorcylaldehyde (2) showed very slight toxic effect against shrimp nauplii Artemia salina Leach., LC50 298,2 and 79,7 μg/mL, respectively.
A Mathematical Model to Study the Effects of Breastfeeding and Vaccination on Rotavirus Epidemics Sherif Eneye Shuaib; Pakwan Riyapan
Journal of Mathematical and Fundamental Sciences Vol. 52 No. 1 (2020)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2020.52.1.4

Abstract

In this article, we formulate and analyze a mathematical model including breastfeeding and vaccination to study the transmission dynamics of rotavirus epidemics. The model is divided into five compartmental classes, namely, the susceptible compartment S(t); the breastfeeding compartment M(t); the vaccinated compartment V(t); the infected compartment I(t); and the recovered compartment R(t). To understand the threshold of infection, the basic reproduction number relating to breastfeeding and vaccination, denoted as Rvm, is computed. The results show that if Rvm<1, the disease-free equilibrium is globally asymptotically stable. Similarly, if Rvm>1, global asymptotic stability of the endemic equilibrium exists. Numerical simulations were carried out to support the model analysis and to examine the effects of breastfeeding and vaccination on rotavirus epidemics. The model fits well with real data to predict the infected population in real life. The analysis and numerical results of the model confirm that the combination of vaccination and breastfeeding is more effective in reducing the spread of rotavirus epidemics.
Protein yang Terkait dengan Teratogenisitas Anggota Tubuh Mencit Swiss Webster Akibat Perlakuan dengan Asam Metoksiasetat (MAA) Aceng Ruyani; Sri Sudarwati; Lien A . Sutasurya; Sony H. Sumarsono
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 3 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah diteliti protein yang terkait dengan teratogenesis anggota tubuh mencit Swiss Webster akibat perlakuan dengan MAA. Mencit umur kebuntingan 11 hari diberi perlakuan dosis tunggal MAA 10 mmol/kg berat badan secara gavage, sedangkan kelompok kontrol hanya diberi pelarut akuabides steril. Mencit bunting dibunuh secara dislokasi leher 4 jam setelah perlakuan dengan MAA. Tunas anggota tubuh depan diisolasi dari kelompok kontrol dan perlakuan lalu dihomogenisasi. Ekstrak kasar kemudian difraksinasi dengan amonium sulfat dan masing-masing fraksi dianalisis dengan teknik l-D dan 2-D SDS-PAGE. Elektroforegram l-D dan 2-D menunjukkan bahwa pada kelompok perlakuan fraksi protein ammonium sulfat 20-40 % (F-lI), dapat dideteksi protein 31,0-36,5 kDa serta bercak protein 35,1 kDa, pI 6,2 yang tidak terdapat pada kontrol. Pada kelompok perlakuan fraksi protein ammonium sulfat 40-60% (F-lll), dapat dideteksi protein 66,3-97,4 kDa serta bercak protein 8 I,7 kDa, pl 7,3 yang tidak terdapat pada kontrol. Sedangkan pada kelompok kontrol F-llI, protein 36,5-55,4 kDa sertab ercakp rotein 41,6 kDa, pI 6,4 terdeteksi, tetapi tidak terdeteksi pada kelompok perlakuan. Dari penelitian ini dapat disimpulkan bahwa pada tunas anggota tubuh depan mencit, perlakuan dengan MAA menginduksi ekspresi dua protein(35,1 kDa, pl 6,2 dan 81,7 kDa, pl 7,3) dan menghambat ekspresi satu protein(41,6 kDa, pl 6,4). Proteins which are Linked with Swiss Webster Mouse Limb Teratogenesis as the Effects of Methoxyacetic Acid (MAA) TreatmentThe analysis of proteins, which are linked with limb teratogenesis as the effects of MAA treated in Swiss Webster mouse has been investigated. A single dose of MAA 10 mmol/kg body weight was given by gavage on gestation day 11 , whereas the control group were administered sterilized distilled water. Pregnant mice were sacrificed by cervical dislocation at 4 hours after MAA treatment. The forelimb buds were isolated from both control and treated group embryos and were then homogenized. The crude extracts were Then fractionated with ammonium sulfate and each fraction was analyzed by 1-D and 2-D SDS-PAGE techniques respectively. The l-D and 2 -D electrophoregrams revealed that in the treated group of protein fraction 20-40% ammonium sulfate ( F-II), a protein of 31.0-36.5 kDa and a protein spot 35.1 kDa, pl 6.2 could be detected, which was not found in the control. In the treated group of protein fraction 40-60% ammonium sulfate( F-lll) a protein of 66.3-97.4 kDa and a protein spot 81.7 kDa, pl 7.3 could be detected which was not found in the control, whereas in the control group a protein of 36.5-55.4 kDa, which is a protein spot4 1.6 and p l 6.4, was detected but not detected in the treated group.It could be concluded from this experiment that in the mouse forelimb buds, MAA treatment induce the protein expression of two proteins(35.1 kDa, pl 6.2 and 81.7 kDa, 7.3) and inhibit the expression of one protein (41.6p, l 6.4).

Page 37 of 69 | Total Record : 689

 35   36   37   38   39 

Filter by Year

1961 2024


Reset
Filter By Issues
All Issue Vol. 56 No. 3 (2024) Vol. 56 No. 1 (2024): (In Progress) Vol. 55 No. 3 (2024) Vol. 55 No. 2 (2023) Vol. 55 No. 1 (2023) Vol. 54 No. 3 (2023) Vol. 54 No. 2 (2022) Vol. 54 No. 1 (2022) Vol. 53 No. 3 (2021) Vol. 53 No. 2 (2021) Vol. 53 No. 1 (2021) Vol. 52 No. 3 (2020) Vol. 52 No. 2 (2020) Vol. 52 No. 1 (2020) Vol. 51 No. 3 (2019) Vol. 51 No. 2 (2019) Vol. 51 No. 1 (2019) Vol. 50 No. 3 (2018) Vol. 50 No. 2 (2018) Vol. 50 No. 1 (2018) Vol. 49 No. 3 (2017) Vol. 49 No. 2 (2017) Vol. 49 No. 1 (2017) Vol. 48 No. 3 (2016) Vol. 48 No. 2 (2016) Vol. 48 No. 1 (2016) Vol. 47 No. 3 (2015) Vol. 47 No. 2 (2015) Vol. 47 No. 1 (2015) Vol. 46 No. 3 (2014) Vol. 46 No. 2 (2014) Vol. 46 No. 1 (2014) Vol. 45 No. 3 (2013) Vol. 45 No. 2 (2013) Vol. 45 No. 1 (2013) Vol. 44 No. 3 (2012) Vol. 44 No. 2 (2012) Vol. 44 No. 1 (2012) Vol. 43 No. 3 (2011) Vol. 43 No. 2 (2011) Vol. 43 No. 1 (2011) Vol. 42 No. 2 (2010) Vol. 42 No. 1 (2010) Vol. 41 No. 2 (2009) Vol. 41 No. 1 (2009) Vol. 40 No. 2 (2008) Vol. 40 No. 1 (2008) Vol. 39 No. 1-2 (2007) Vol. 38 No. 2 (2006) Vol. 38 No. 1 (2006) Vol. 37 No. 2 (2005) Vol. 37 No. 1 (2005) Vol. 36 No. 2 (2004) Vol. 36 No. 1 (2004) Vol. 35 No. 2 (2003) Vol. 35 No. 1 (2003) Vol. 34 No. 2&3 (2002) Vol. 33 No. 3 (2001) Vol. 33 No. 2 (2001) Vol. 33 No. 1 (2001) Vol. 32 No. 2 (2000) Vol. 32 No. 1 (2000) Vol. 31 No. 3 (1999) Vol. 31 No. 2 (1999) Vol. 31 No. 1 (1999) Vol. 30 No. 3 (1998) Vol. 30 No. 2 (1998) Vol. 30 No. 1 (1998) Vol. 29 No. 1/2 (1996) Vol. 27 No. 3 (1994) Vol. 27 No. 2 (1994) Vol. 25 No. 2/3 (1992) Vol. 25 No. 1 (1992) Vol. 24 No. 2/3 (1991) Vol. 24 No. 1 (1991) Vol. 23 No. 1 (1990) Vol. 22 No. 1/2/3 (1989) Vol. 21 No. 2/3 (1988) Vol. 21 No. 1 (1988) Vol. 20 No. 1/2 (1987) Vol. 20 No. 3 (1987) Vol. 19 No. 2/3 (1986) Vol. 19 No. 1 (1986) Vol. 18 No. 2/3 (1985) Vol. 18 No. 1 (1985) Vol. 17 No. 3 (1984) Vol. 17 No. 2 (1984) Vol. 17 No. 1 (1984) Vol. 16 No. 3 (1983) Vol. 16 No. 2 (1983) Vol. 16 No. 1 (1983) Vol. 15 No. 3 (1982) Vol. 15 No. 2 (1982) Vol. 15 No. 1 (1982) Vol. 14 No. 1/2 (1981) Vol. 14 No. 3 (1981) Vol. 13 No. 1/2 (1980) Vol. 13 No. 3 (1980) Vol. 12 No. 3 (1979) Vol. 12 No. 2 (1979) Vol. 12 No. 1 (1979) Vol. 11 No. 3 (1978) Vol. 11 No. 2 (1977) Vol. 11 No. 1 (1976) Vol. 10 No. 3 (1976) Vol. 10 No. 2 (1975) Vol. 10 No. 1 (1975) Vol. 9 No. 3 (1975) Vol. 9 No. 2 (1975) Vol. 9 No. 1 (1974) Vol. 8 No. 3 (1974) Vol. 8 No. 2 (1974) Vol. 8 No. 1 (1974) Vol. 7 No. 4 (1974) Vol. 7 No. 3 (1973) Vol. 7 No. 2 (1973) Vol. 7 No. 1 (1973) Vol. 6 No. 4 (1972) Vol. 6 No. 3 (1972) Vol. 6 No. 2 (1971) Vol. 6 No. 1 (1971) Vol. 5 No. 1 (1970) Vol. 4 No. 4 (1970) Vol. 4 No. 3 (1969) Vol. 4 No. 2 (1968) Vol. 4 No. 1 (1967) Vol. 3 No. 4 (1965) Vol. 3 No. 3 (1965) Vol. 3 No. 2 (1964) Vol. 3 No. 1 (1964) Vol. 2 No. 4 (1963) Vol. 2 No. 3 (1963) Vol. 2 No. 2 (1962) Vol. 2 No. 1 (1962) Vol. 1 No. 4 (1961) Vol. 1 No. 3 (1961) Vol. 1 No. 2 (1961) Vol. 1 No. 1 (1961) More Issue