cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5517/ccdc.csd.cc20bdyq
title: CCDC 1857053: Experimental Crystal Structure Determination

description: Related Article: Yanpei Wang,  Shuhai Qiu,  Sheng Xie,  Long Zhou,  Youhua Hong,  Jingjing Chang,  Jishan Wu,  and Zebing Zeng|2019|J.Am.Chem.Soc.|141|2169|doi:10.1021/jacs.8b13884
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc20bdzr
title: CCDC 1857054: Experimental Crystal Structure Determination

description: Related Article: Yanpei Wang,  Shuhai Qiu,  Sheng Xie,  Long Zhou,  Youhua Hong,  Jingjing Chang,  Jishan Wu,  and Zebing Zeng|2019|J.Am.Chem.Soc.|141|2169|doi:10.1021/jacs.8b13884
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc20bf0t
title: CCDC 1857055: Experimental Crystal Structure Determination

description: Related Article: Yanpei Wang,  Shuhai Qiu,  Sheng Xie,  Long Zhou,  Youhua Hong,  Jingjing Chang,  Jishan Wu,  and Zebing Zeng|2019|J.Am.Chem.Soc.|141|2169|doi:10.1021/jacs.8b13884
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc20xbz8
title: CCDC 1874290: Experimental Crystal Structure Determination

description: Related Article: Lan Deng, Wan-Ting Jin, Wei-Zheng Weng, Zhao-Hui Zhou|2019|Polyhedron|159|375|doi:10.1016/j.poly.2018.12.012
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.21227/gqf8-jj34
title: A Novel SOI-LDMOSFET With Superior Electrical Performances

description: In current study, a new silicon-on-insulator (SOI) lateral-double-diffused metal-oxide-semiconductor field-effect transistor (LDMOSFET) is offered. Altering charge distribution causes less electric field crowding and enhanced breakdown voltage (VBR). For amending charge distribution, a metal region (COLUMN) and an air layer in the transistor are used. On the other the floating-body influence and impact ionization produce additional holes that are intensified via the parasitic bipolar junction transistor (BJT) in SOI-LDMOSFET that weaken the transistor efficiency. For that matter, a silicon layer under the BOX, attached to the channel area through the COLUMN has been replaced for reducing the hole density in the channel and control the BJT impact considerably. In order to attain the optimal outcomes, the COLUMN and the silicon layer under the BOX location and sizes are optimized carefully. DC and radio frequency features corresponding to the offered structure are examined through 2-D numerical simulation and compared with conventional SOI-LDMOSFET (C-SOI-LDMOSFET) features. The VBR corresponding to the offered structure develops by 229% comparing with that of the C-SOI-LDMOSFET structure. Though drain current of the suggested structure decreases slightly, 220% development in utmost output power density for the device is attained because of great enhancement of the VBR. Furthermore, the suggested structure causes the development of utmost oscillation frequency, utmost existing gain, and selfheating impacts corresponding to the device. Consequently, the suggested structure has excellent electrical performances comparing with the analogous device according to the conventional structure.
DOI: 10.5517/ccdc.csd.cc20xc0b
title: CCDC 1874291: Experimental Crystal Structure Determination

description: Related Article: Lan Deng, Wan-Ting Jin, Wei-Zheng Weng, Zhao-Hui Zhou|2019|Polyhedron|159|375|doi:10.1016/j.poly.2018.12.012
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21b2j0
title: CCDC 1886521: Experimental Crystal Structure Determination

description: Related Article: Ichiro Hisaki,  Yuto Suzuki,  Eduardo Gomez,  Qin Ji,  Norimitsu Tohnai,  Takayoshi Nakamura,  Abderrazzak Douhal|2019|J.Am.Chem.Soc.|141|2111|doi:10.1021/jacs.8b12124
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21fmdj
title: CCDC 1889927: Experimental Crystal Structure Determination

description: Related Article: L.G. Madeley, D.C. Levendis, A. Lemmerer|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|200|doi:10.1107/S205322961900055X
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21fmfk
title: CCDC 1889928: Experimental Crystal Structure Determination

description: Related Article: L.G. Madeley, D.C. Levendis, A. Lemmerer|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|200|doi:10.1107/S205322961900055X
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21fmgl
title: CCDC 1889929: Experimental Crystal Structure Determination

description: Related Article: L.G. Madeley, D.C. Levendis, A. Lemmerer|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|200|doi:10.1107/S205322961900055X
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21fmhm
title: CCDC 1889930: Experimental Crystal Structure Determination

description: Related Article: L.G. Madeley, D.C. Levendis, A. Lemmerer|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|200|doi:10.1107/S205322961900055X
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21464k
title: CCDC 1880867: Experimental Crystal Structure Determination

description: Related Article: Franz A. Mautner, Magdalena Traber, Patricia Jantscher, Roland C. Fischer, Klaus Reichmann, Ramon Vicente, Noor Arafat, Salah S. Massoud|2019|Polyhedron|161|309|doi:10.1016/j.poly.2019.01.030
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21466m
title: CCDC 1880869: Experimental Crystal Structure Determination

description: Related Article: Franz A. Mautner, Magdalena Traber, Patricia Jantscher, Roland C. Fischer, Klaus Reichmann, Ramon Vicente, Noor Arafat, Salah S. Massoud|2019|Polyhedron|161|309|doi:10.1016/j.poly.2019.01.030
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21fmjn
title: CCDC 1889931: Experimental Crystal Structure Determination

description: Related Article: L.G. Madeley, D.C. Levendis, A. Lemmerer|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|200|doi:10.1107/S205322961900055X
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21g972
title: CCDC 1890573: Experimental Crystal Structure Determination

description: Related Article: Songjin Guo, Panpan Li, Zhe Guan, Libo Cai, Siwei Chen, Aijun Lin, Hequan Yao|2019|Org.Lett.|21|921|doi:10.1021/acs.orglett.8b03884
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21g983
title: CCDC 1890574: Experimental Crystal Structure Determination

description: Related Article: Songjin Guo, Panpan Li, Zhe Guan, Libo Cai, Siwei Chen, Aijun Lin, Hequan Yao|2019|Org.Lett.|21|921|doi:10.1021/acs.orglett.8b03884
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21gqy6
title: CCDC 1890998: Experimental Crystal Structure Determination

description: Related Article: M.S.H. Faizi, M.N. Lone, N. Dege, T. Iskenderov, S. Malinkin|2019|IUCrData|4|x190094|doi:10.1107/S2414314619000944
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21hsq2
title: CCDC 1892014: Experimental Crystal Structure Determination

description: Related Article: N.-N. Chen, J.-N. Ni, J. Wang, J.-Q. Tao|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|196|doi:10.1107/S2053229619000986
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21j0l6
title: CCDC 1892227: Experimental Crystal Structure Determination

description: Related Article: M.A.M. Capozzi, G. Terraneo, C. Cardellicchio|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|189|doi:10.1107/S2053229619001050
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21j0m7
title: CCDC 1892228: Experimental Crystal Structure Determination

description: Related Article: M.A.M. Capozzi, G. Terraneo, C. Cardellicchio|2019|Acta Crystallogr.,Sect.C:Cryst.Struct.Chem.|75|189|doi:10.1107/S2053229619001050
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21jj6b
title: CCDC 1892711: Experimental Crystal Structure Determination

description: Related Article: A. Preuss, M. Korb, H. Lang|2019|Acta Crystallogr.,Sect.E:Cryst.Commun.|75|268|doi:10.1107/S2056989019001178
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc21jl39
title: CCDC 1892770: Experimental Crystal Structure Determination

description: Related Article: H.C. Neal, H. Tamtam, B.W. Smucker, V.V. Nesterov|2019|IUCrData|4|x190122|doi:10.1107/S2414314619001226
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5281/zenodo.2553085
title: Energy metals SI Resources

description: Full calculation and data for modelling supply constraints of energy metals in a 100 % renewable energy system.

Results published in Resources: Enough metals? Resource Constraints to Supply a Fully Renewable Energy System
DOI: 10.5281/zenodo.2553086
title: Energy metals SI Resources

description: Full calculation and data for modelling supply constraints of energy metals in a 100 % renewable energy system.

Results published in Resources: Enough metals? Resource Constraints to Supply a Fully Renewable Energy System
DOI: 10.17632/42jdy7pr8f.3
title: Data for: The combined effects of acute irradiation and food supply on survival and fertility in Daphnia magna

description: The database contains the whole set of data on fertility of control and irradiated Daphnia (Generation F0) and their first (Generation F1) and second (Generation F2) progeny. For each Daphnia the total number of progeny, number of broods, brood size, parental dose and food supply are given.
DOI: 10.14457/psu.res.2011.37
title: ศึกษา Single nucleotide polymorphisms (SNPs) ในโปรโมเตอร์ของยีน accD ในปาล์มน้ำมัน
DOI: 10.14457/psu.res.2014.26
title: การดูแลสุขภาพ อาชีวเวชศาสตร์ อนามัยเจริญพันธุ์ และผู้สูงวัย
DOI: 10.14457/psu.res.2013.39
title: ปัจจัยที่ส่งผลต่อการผลิตผลงานวิจัยของบุคลากรสายสนับสนุนคณะศึกษาศาสตร์มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
DOI: 10.14457/psu.res.2009.73
title: การตรวจสอบสายพันธุ์ปาล์มน้ำมันโดยอาศัยเทคนิคโฟลไซโทเมทรี
DOI: 10.14457/cu.the.2006.1604
title: การจำแนกสัดส่วนแหล่งกำเนิดของฝุ่นละอองขนาดไม่เกิน 10 ไมครอน สำหรับจังหวัดสมุทรปราการ

description: ศึกษาหาสัดส่วนแหล่งกำเนิดที่มีผลกระทบต่อคุณภาพอากาศของพื้นที่ต่างๆ ในจังหวัดสมุทรปราการ ซึ่งมีความหนาแน่นของโรงงานอุตสาหกรรมต่อพื้นที่มากที่สุดในประเทศไทย ตัวอย่างฝุ่นละอองขนาดไม่เกิน 10 ไมครอน (PM10) ได้ถูกเก็บจากแหล่งรับ 4 จุดคือ ศูนย์ฟื้นฟูอาชีพและสถานสงเคราะห์คนพิการพระประแดง โรงเรียนวัดกิ่งแก้ว โรงเรียนปากคลองมอญ และโรงเรียนคลองเจริญราษฎร์ สำหรับการจำแนกแบบจำลองแหล่งรับได้มีการพิจารณาแหล่งกำเนิดหลักคือ ละอองไอจากทะเล ฝุ่นจากดินและถนน ฝุ่นจากยานพาหนะ ฝุ่นจากการใช้เชื้อเพลิงในอุตสาหกรรม ฝุ่นจากเตาเผาขยะ ฝุ่นจากการเผาไหม้ชีวมวล กระบวนการวิเคราะห์หาองค์ประกอบทางเคมีเพื่อหาปริมาณ ธาตุ ไอออนละลายน้ำได้ และการวิเคราะห์คาร์บอน ทั้งจากแหล่งรับและแหล่งกำเนิด กระทำโดยวิธี X-ray fluorescence (XRF), ion chromatography (IC), uv spectrophotometer และ CHNS/O analyzer การใช้แบบจำลอง Factor analysis-multiple regression (FA-MR) และการใช้แบบจำลองดุลยภาพมวลเคมี (Chemical mass balance model) กับจังหวัดสมุทรปราการ พบว่าสัดส่วนส่วนที่มาโดยเฉลี่ยของ PM10 โดยวิธี FA-MR มาจากฝุ่นดินและถนน 0-36.7% ฝุ่นจากไอเสียรถยนต์ 0-32.9% ฝุ่นจากการเผาไหม้เชื้อเพลิงในภาคอุตสาหกรรม 14.6-61.6% ฝุ่นจากกระบวนการอุตสาหกรรม 0-26.8% ละอองไอทะเล 0-4.8% และฝุ่นไม่ทราบที่มา 15.5-42.2% และการใช้วิธี CMB พบแหล่งกำเนิดมาจากฝุ่นถนน 0-25.0% ฝุ่นจากไอเสียรถยนต์ดีเซลเบา 0-12.1% ฝุ่นจากไอเสียรถมอเตอร์ไซต์ 4 จังหวะ 3.3-14.3% ฝุ่นจากการเผาขยะ 0-13.6% ฝุ่นจากการเผาชีวมวล 0-18.9% ฝุ่นจากหม้อไอน้ำที่ใช้น้ำมันเตาเป็นเชื้อเพลิงในอุตสาหกรรม 0-29.0% ฝุ่นจากหม้อไอน้ำที่ใช้ถ่านหินลิกไนต์เป็นเชื้อเพลิงในอุตสาหกรรม 0-17.3% ฝุ่นจากหม้อไอน้ำที่ใช้ขี้เลื่อยเป็นเชื้อเพลิงในอุตสาหกรรม 0-4.7% ฝุ่นจากอุตสาหกรรมไม้ 0-22.9% ฝุ่นจากอุตสาหกรรมเซรามิค 7.1-15.4% ฝุ่นจากอุตสาหกรรมเหล็ก 0-18.5% และละอองไอทะเล 2.8-4.7%
DOI: 10.14457/cu.the.2006.1605
title: การตรวจจับความเร็วรถยนต์แบบทันกาลในเวลากลางคืนโดยใช้การประมวลผลภาพวีดิทัศน์

description: งานวิจัยนี้มีวัตถุประสงค์เพื่อหาอัลกอริธึมและพัฒนาโปรแกรมต้นแบบในการตรวจจับความเร็วของรถยนต์ในเวลา กลางคืนแบบทันกาลจากภาพวีดิทัศน์โดยเล็งกล้องมาทางด้านหน้ารถ อัลกอริธึมที่นำเสนอในงานวิจัยประกอบด้วย 2 ส่วนหลัก คือ การตรวจจับรถยนต์และการวัดความเร็วของรถยนต์ การทำงานเริ่มต้นด้วยการกำหนดรอบตรวจจับ ในช่องทางเจราจรที่รถยนต์วิ่งผ่านและจะประมวลผลภาพและวิเคราะห์ข้อมูลเบื้องต้นในบริเวณกรอบตรวจจับที่ กำหนด ขั้นตอนการตรวจจับตำแหน่งของรถยนต์ใช้วิธีการตรวจหาตำแหน่งของดวงไฟหน้ารถยนต์ในกรอบตรวจ จับเพื่อหาตำแหน่งอ้างอิงของรถยนต์ในภาพ แล้วใช้ฟังก์ชันการประมาณค่าใช้ช่วงกำลังสามในการหาค่าระยะ อ้างอิงตำแหน่งรถยนต์จริงบนพื้นถนน จากนั้นจะตรวจหาตำแหน่งรถยนต์ในเฟรมถัดไปโดยวิธีการเดียวกัน ซึ่งจะ ทำให้สามารถคำนวณหาค่าความเร็วของรถยนต์ได้ โดยการนำระยะเวลาที่ใช้ในการเคลื่อนที่ของรถยนต์มาหา ระยะทางจริงที่รถยนต์เคลื่อนในสองเฟรมที่ต่อเนื่องกัน ในการทดสอบกระทำโดยการใช้ภาพวีดิทัศน์ที่บันทึกจาก สภาพจราจรจริง การวัดความเร็วอ้างอิงของรถยนต์ทำโดยใช้เรดาร์เป็นเครื่องมือวัด ความเร็วของรถยนต์ที่สุ่มวัด ในการทดสอบอยู่ระหว่าง 30 ถึง 95 กิโลเมตรต่อชั่วโมง จากการทดสอบพบว่าร้อยละ 92.1 ของรถที่ตรวจจับ ความเร็วได้จะมีความผิดพลาดของความเร็วไม่เกิน 0.686 กิโลเมตรต่อชั่วโมง โดยมีความเบี่ยงเบนมาตรฐาน ไม่เกิน 0.614 กิโลเมตรต่อชั่วโมง
DOI: 10.14457/cu.the.2006.1606
title: Living Conditions of cambodian illegal migrant workers in Thailand

description: After the civil was and the process of peace and economic development in Cambodia, hundreds of thousands of Cambodian people have continuously been immigrating illegally into Thailand mainly for the purposes of finding new job opportunities and higher wages to increase their living standard. The Cambodian illegal migrants work almost everywhere in Thailand, especially in the Bangkok metropolitan area, mainly in the construction zones and in the fishing industry provinces as fishermen. This thesis examines the living conditions of Cambodian illegal immigrants in Thailand, focusing on the experiences and current living conditions of 30 people, 15 of whom are working as construction workers in Bangkok and 15 working as fishermen in Rayong province, Thailand. The Cambodian illegal immigrant workers are working and living under very risky conditions and are often treated indecently. This study finds they experience and continue to face the following difficulties; They have no right to protest if their employers cheat them on labor wages, instead they are often threatened and will quit their job as solution; they are living under violent conditions, generally caused by the illegal immigrants themselves; and they have very limited space and right to travel, which was considered a main problem by them. In addition, there is no intention to protect them or provided them with any means to solve these problems. However, the Cambodian illegal migrant workers can enjoyed some economic and social activities while working in Thailand. Fishermen are paid everyday for daily expends no matter they are working or not. Construction workers can practice traditional ceremonies like wedding in their living areas. A conclusion to this study is that the Cambodian immigrants illegal status strongly affects their working and living conditions in Thailand.
DOI: 10.14457/cu.the.2006.1607
title: Improvement of mechanical properties of Si[subscript 3]N [subscript 4] using low cost materials and processes

description: The difference in mass loss behavior of Si[subscript 3] N [subscript 4] between sintering in air atmosphere and sintering under controlled N [subscript 2]pressure was intensively studied and the results were systematically evaluated. In addition, the optimal composition and sintering condition for improving the mechanical properties of Si[subscript 3] N [subscript 4] using low-cost materials and processes were investigated. Low-cost Si[subscript 3]N[subscript 4] powder and additives were used as the starting materials. Sintering was performed both under air atmosphere and under N[subscript 2] atmosphere. The results showed that the mass loss of the Si[subscript 3] N [subscript 4] sintered under air atmosphere insignificantly changed with increasing sintering temperature, but significantly increased with the O[subscript 2] or SiO[subscript 2] contents in the composition before sintering. It was also affected by the pressure gradient of oxygen partial pressure (Po[subscript 2]) and the formation of the impermeable layer in the crucible during sintering. On the other hand, the mass loss during sintering increased with increasing the sintering temperature and soaking time when Si[subscript 3]N[subscript 4] was sintered under N [subscript 2] atmosphere. The optimal composition and sintering condition for obtaining the highest mechanical properties at room temperature were 96wt% Si[subscript 3]N[subscript 4] + 2wt% MgO + 2wt% AI[subscript 2] O [subscript 3] and sintering at 1850ํ C for 2 h under N[subscript 2] gas pressure of 1.0 MPa. The flexural strength, fracture toughness and hardness obtained were 544 MPa, 5.9MPa m[subscript 1/2] and 16 GPa, respectively. The mechanical property values are in the level of commercially available pressureless sintered Si[subscript 3] N [subscript 4] ceramics.