複数発表者対応ネットワークドプレゼンテーションシステムNetPerzに関する研究

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(1)社団法人情報処理学会研究報告 IPSJ SIG Technical Report. 2004−GN−52 (4) 2004／5／20. ⶄᢙ⊒⴫⠪ኻᔕࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓ NetPerz ߦ㑐ߔࠆ⎇ⓥ ዊ. ጊ. ඳ. ผ†. ㄭᐕࡀ࠶࠻ࡢ࡯ࠢⅣႺ߇ឭଏߐࠇߡ޿ࠆળ႐ߦߡࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ߇ⴕࠊࠇࠆᯏળ߇Ⴧ߃ߡ߅ࠅ㧘 ࡀ࠶࠻ࡢ࡯ࠢࠍ᦭ലߦ೑↪ߒߚࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓ߳ߩᦼᓙ߇㜞߹ߞߡ޿ࠆ㧚ᧄ⎇ⓥߢߪ㧘 ࡀ࠶࠻ࡢ࡯ࠢࠍ᦭ലߦ೑↪ߔࠆߚ߼ߦ⾗ᢱឭ␜ᯏ⢻㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻㧘⾗ᢱ࠺࡯࠲ឭଏ ᯏ⢻ࠍ⺰ℂ⊛ߦಽ㔌ߒ㧘ߎࠇࠄ߇ࡀ࠶࠻ࡢ࡯ࠢߢද⺞േ૞ߔࠆࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓ NetPrez ߩ㐿⊒ࠍߒߚߩߢႎ๔ߔࠆ㧚ߎߩࠃ߁ߥࠪࠬ࠹ࡓߪࡄࡀ࡞࠺ࠖࠬࠞ࠶࡚ࠪࡦߥߤⶄᢙ⊒⴫⠪߇⾗ᢱࠍ ߟ߉ߟ߉ߣឭ␜ߔࠆࠃ߁ߥࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦߦ߅޿ߡ᦭ലߣ⠨߃ࠄࠇࠆ㧚. Research of Networked presentation system NetPrez Hiroshi Koyama† The number of conference rooms and halls which provide network environment is increasing in recent years . As the result, the presentation systems effectively utilizing the network technology are expected to be developed. This paper reports about the NetPrez, our newly developed network presentation system. This system logically divides its functions into data presenting functions, presentation control functions, and data offering functions, and make these functions work in unison in a network environment. This system is considered to work effectively especially for panel discussions and the presentations where a plural number of presenters are required to show their data one after another.. 1. ߪ ߓ ߼ ߦ. ᔕߩࠦࡦࡇࡘ࡯࠲㧘ࡊࡠࠫࠚࠢ࠲ࠍ೑↪ߔࠆ႐วࠍኻ ⽎ߣߒߡ޿ࠆ㧚. ㄭᐕ㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦߩᯏ⢻. ╩⠪ߪߎࠇ߹ߢ㧘ࡀ࠶࠻ࡢ࡯ࠢߦធ⛯ߐࠇߚࡊࡠࠫࠚ. లታߣࡁ࡯࠻ࡄ࠰ࠦࡦߥߤߩ᥉෸ߦࠃࠅ㧘ࡊ࡟࠯ࡦ. ࠢ࠲㧘ࠦࡦࡇࡘ࡯࠲㧘ᖱႎኅ㔚ߥߤߢ᭴ᚑߐࠇࠆࡊ࡟࠯. ࠹࡯࡚ࠪࡦߦࠦࡦࡇࡘ࡯࠲ࠍ↪޿ࠆ⊒⴫߇᥉ㅢߣߥߞ. ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓߦ㑐ߒߡᬌ⸛ߒ㧘ߘࠇࠍታ⃻ߔࠆ. ߡ߈ߡ޿ࠆ㧚߹ߚ㧘ࡀ࠶࠻ࡢ࡯ࠢⅣႺ߇లታߒߡ߈ߡ ߅ࠅ㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦળ႐ߥߤߢ߽ࡀ࠶࠻ࡢ࡯ࠢ. ߩࡊࡠ࠻࠲ࠗࡊࠍ૞ᚑߒߚ㧚ߎߩ NETPROJ ߩ․㐳. ߳ߩᏱᤨធ⛯߇น⢻ߥ႐ว߇ᄙߊߥߞߡ޿ࠆ㧚ߎߩࠃ. ߣߒߡߪ㧘ធ⛯ᯏེ߿႐ᚲߩ೙⚂߇ߥ޿ߎߣ㧘ࡊ࡟࠯. ߁ߥⅣႺߦ߅޿ߡߪ㧘ࡊࡠࠫࠚࠢ࠲ߣࠦࡦࡇࡘ࡯࠲ࠍ. ࡦ࠹࡯࡚ࠪࡦ↪ࠦࡦ࠹ࡦ࠷ߩ଻▤႐ᚲ߇⥄↱ߢ޽ࠆߎ. ࡀ࠶࠻ࡢ࡯ࠢߢធ⛯ߒߡ೑↪ߔࠆߎߣ߇᥉ㅢߢ޽ࠅ㧘. ߣ㧘⡬⻠⠪ߩ┵ᧃߦ⾗ᢱࠍ㈩ାน⢻ߥߎߣ㧘ߥߤ߇޽. ࡊࡠࠫࠚࠢ࠲ࠍⶄᢙฬߢ᦭ലߦ೑↪ߔࠆߚ߼ߩࡀ࠶࠻. ࠆ㧚߹ߚߎߩࠪࠬ࠹ࡓࠍ೑↪ߒߚᢎ⢒ߦߟ޿ߡ߽ឭ. ࡢ࡯ࠢ࠼ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓ߳ߩⷐᦸ߇㜞. ᩺ 3) ߒߡ߈ߚ㧚. ߽ߩߣߒߡࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊࡠࠫࠚࠢ࠲ NETPROJ2). ߹ߞߡ޿ࠆ㧚. ߎࠇࠄߩ⎇ⓥࠍㅢߒߡ㧘⾗ᢱឭ␜ᯏ⢻㧘ࡊ࡟࠯ࡦ. ‫ߣ࠙࠼ࡦࠖ࠙᦭౒ޟ‬േ↹ࠍ↪޿ߚ㆙㓒ࡑ࡞࠴ࡔ࠺ࠖ. ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻㧘⾗ᢱ࠺࡯࠲ឭଏᯏ⢻ࠍ⺰ℂ⊛ߦ. ࠕࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓߩ⎇ⓥ‫ޠ‬1) ߩࠃ߁ߦ㆙. ಽ㔌ߒ㧘ߎࠇࠄ߇ࡀ࠶࠻ࡢ࡯ࠢߢද⺞േ૞ߔࠆࡊ࡟࠯. 㓒࿾㑆ߢห৻ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠍឭଏߔࠆᣇᴺߦߟ. ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓ NetPrez ߩታ↪࡟ࡌ࡞ߢߩታ. ޿ߡߩ⎇ⓥߥߤ߽޽ࠆ߇㧘ߎߎߢߪ㧘ห৻ળ႐ౝߢࡊ. ⵝ߇㊀ⷐߢ޽ࠆߎߣ߇ࠊ߆ߞߚ㧚ߒ߆ߒ㧘ᓥ᧪ߩࡊࡠ. ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠍߔࠆߦ޽ߚߞߡ㧘ࡀ࠶࠻ࡢ࡯ࠢኻ. ࠻࠲ࠗࡊߢߪឭ␜น⢻ߥ⾗ᢱߩࡈࠜ࡯ࡑ࠶࠻߇ዋߥ޿㧘. † 㐳㊁⋵Ꮏ⑼⍴ᦼᄢቇᩞ‫ޓ‬ᖱႎᛛⴚ⑼ Computer and Systems Engineering, Nagano Prefectural Institute of Technology. ⊒⴫⠪ߩࠦࡦࡇࡘ࡯࠲↹㕙ߪឭ␜⾗ᢱ࠺࡯࠲ߣߒߡ޿ ߥ߆ߞߚߚ߼㧘ࠦࡦࡇࡘ࡯࠲↹㕙ߩ⴫␜߇ߢ߈ߥ޿ߣ ޿ߞߚ໧㗴߇޽ߞߚ㧚੹࿁ߪߎࠇࠄߩ໧㗴ࠍ⸃᳿ߔࠆ. −19−.

(2) ߚ߼ߦ㧘NETPROJ ߩᯏ⢻ߩ߁ߜ࠰ࡈ࠻࠙ࠚࠕߢታ. ␜↹㕙ߩ૏⟎߿ࠨࠗ࠭ࠍᄌᦝߔࠆ㧚 ࠺࡯࠲࠰࡯ࠬߢߪ㧘ⷐ᳞ߩ޽ߞߚ࠺࡯࠲ࠍឭଏߔࠆ㧚. ⃻ߐࠇࠆㇱಽࠍࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪ ࠬ࠹ࡓ NetPrez ߣߒߡታⵝߒ⋥ߒߚ㧚. ߎߎߢ࠺࡯࠲ࠍឭଏߔࠆࡊࡠ࠻ࠦ࡞ߣߒߡߪ㧘ࡆ࠶࠻. ᧄⓂߢߪ㧘ߎߩࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ. ࠪࠬ࠹ࡓ NetPrez ߩታ⃻ᣇᴺߦߟ޿ߡႎ๔ߔࠆ㧚. ࡑ࠶ࡊ↹௝ࡈࠔࠗ࡞㧔JPEG㧘GIF㧘PNG㧕㧘HTML ᢥᦠࡈࠔࠗ࡞㧘ࡌࠢ࠲࡯↹௝ࡈࠔࠗ࡞㧔SVG㧕ߦߟ޿. ߡߪ HTTP ࠍណ↪ߒߚ㧚േ↹ࠬ࠻࡝࡯ࡓ࠺࡯࠲ߦߟ. 2. NetPrez NetPrez ߩᯏ⢻ߪ㧘⾗ᢱឭ␜ᯏ⢻㧘ࡊ࡟࠯ࡦ࠹࡯ ࡚ࠪࡦ೙ᓮᯏ⢻㧘⾗ᢱ࠺࡯࠲ឭଏᯏ⢻ߦᄢ߈ߊಽߌࠄ. ޿ߡߪ㧘RTP ࠍណ↪ߒߚ㧚ࠦࡦࡇࡘ࡯࠲↹㕙ࠗࡔ࡯ࠫ. ߦߟ޿ߡߪ㧘⁛⥄ߦ⸳⸘ߒߚ Screen Image Transfer. Protocol(SITP) ࠍណ↪ߒߚ㧚. ᓥ᧪ߩࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦߢߪ㧘. ࠇࠆ㧚ߎࠇࠄࠍࡀ࠶࠻ࡢ࡯ࠢ਄ߦಽᢔߐߖߡ㧘ද⺞േ ૞ߐߖࠆߎߣߦࠃࠅ㧘ࡀ࠶࠻ࡢ࡯ࠢࠍ᦭ലᵴ↪ߔࠆࡊ. ࠺࡯࠲࠰࡯ࠬߪ㒢ࠄࠇߡ߅ࠅ㧘޽ࠄ߆ߓ߼૞ᚑߒߡ߅. ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓࠍታ⃻ߔࠆ㧚. ޿ߚࡈࠔࠗ࡞ࠍ⴫␜ߔࠆ߆㧘ࠦࡦࡇࡘ࡯࠲↹㕙ో૕ࠍ. 2.1 ࠪࠬ࠹ࡓ᭴ᚑ NetPrez ߩࠪࠬ࠹ࡓ᭴ᚑ࿑ࠍ␜ߔ㧔࿑ 1㧕㧚ᧄⓂߢ. ⴫␜ߔࠆ߆ߩߤߜࠄ߆ߒ߆ㆬᛯߢ߈ߥ߆ߞߚ߇㧘Net-. ߪ⾗ᢱឭ␜ᯏ⢻ࠍታ⃻ߔࠆࡊࡠࠣ࡜ࡓࠍࡊ࡟࠯ࡦࠨ࡯. ࠗࡔ࡯ࠫߣ޿ߞߚ߽ߩࠍ࠺࡯࠲࠰࡯ࠬߣߒߡ૏⟎ߠߌ. ࡃ㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻ࠍታ⃻ߔࠆࡊࡠࠣ࡜. ߡ߅ࠅ㧘࡙࡯ࠩߩㆬᛯ⢇ࠍᐢߍߡ޿ࠆ㧚. ࡓࠍࠦࡦ࠻ࡠ࡯࡜㧘⾗ᢱ࠺࡯࠲ឭଏᯏ⢻ࠍታ⃻ߔࠆࡊ ࡠࠣ࡜ࡓࠍ࠺࡯࠲࠰࡯ࠬߣ๭߱ߎߣߦߔࠆ㧚. Prez ߢߪ㧘ࡈࠔࠗ࡞㧘ࠬ࠻࡝࡯ࡓ㧘ࠦࡦࡇࡘ࡯࠲↹㕙. 2.2 ⾗ᢱឭ␜ᯏ⢻ ࡊ࡟࠯ࡦࠨ࡯ࡃߦ߅ߌࠆ⾗ᢱឭ␜ᯏ⢻ታ⃻ߦߟ޿ߡ ㅀߴࠆ㧚ࡊ࡟࠯ࡦࠨ࡯ࡃߢ⾗ᢱࠍ⴫␜ߔࠆߚ߼ߩࠢ ࡜ࠬߪ⁛⥄ߩ Component ࠗࡦ࠲ࡈࠚ࡯ࠬࠍታⵝߔࠆ. ࠃ߁ߦ⸳⸘ߒߚ㧔࿑ 2㧕㧚HtmlComponent ࠢ࡜ࠬߪ. HTML ᢥᦠࡈࠔࠗ࡞⴫␜ᯏ⢻ࠍ㧘ImageCompnent ࠢ ࡜ࠬߪࡆ࠶࠻ࡑ࠶ࡊ↹௝⴫␜ᯏ⢻ࠍ㧘RtpComponent ࠢ࡜ࠬߪേ↹ࠬ࠻࡝࡯ࡓ࠺࡯࠲⴫␜ᯏ⢻ࠍ㧘SitpComponent ࠢ࡜ࠬߪࠦࡦࡇࡘ࡯࠲↹㕙ࠗࡔ࡯ࠫ⴫␜ᯏ⢻ ࠍ㧘SvgComponent ࠢ࡜ࠬߪࡌࠢ࠲࡯↹௝⴫␜ᯏ⢻ ࠍታ⃻ߔࠆ㧚. ࿑ 1 NetPrez ࠪࠬ࠹ࡓ᭴ᚑ࿑ Fig. 1 System configuration of NetPrez. ೑↪⠪ߣߒߡߪ㧘มળ⠪ߣ⊒⴫⠪ࠍᗐቯߒߡ޿ࠆ㧚 ⊒⴫⠪ߪᚻరߩࠦࡦ࠻ࡠ࡯࡜ࠍ೑↪ߒߡ⥄↱ߦ⾗ᢱ ࿑ 2 Comonent ࠢ࡜ࠬ࿑ Fig. 2 Component class diagram. ࠍ࠺࡯࠲࠰࡯ࠬ߆ࠄขࠅ಴ߒ㧘ࡊ࡟࠯ࡦࠨ࡯ࡃࠍㅢߒ ߡࠬࠢ࡝࡯ࡦ߳⾗ᢱឭ␜ߢ߈ࠆ㧚มળ⠪ߪᓥ᧪ߩࡊ࡟ ࠯ࡦ࠹࡯࡚ࠪࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦࠍ૶↪ߒߚ޿⊒⴫⠪ ߩߚ߼ߦ㧘ߘߩ⊒⴫⠪ߩࠦࡦࡇࡘ࡯࠲↹㕙ࠍࡊ࡟࠯ࡦ. ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦߦ߅޿ߡߪ㧘↹㕙ࠍ⴫␜ߒߡ߆. ࠨ࡯ࡃࠍㅢߒߡࠬࠢ࡝࡯ࡦ߳ឭ␜ߐߖࠆߎߣ߇ߢ߈ࠆ㧚. ࠄ⺑᣿ࠍߒ㧘⺑᣿߇⚳ࠊߞߡ߆ࠄᰴߩ↹㕙߳ಾࠅᦧ߃. มળ⠪ߪ߹ߚ㧘ળ⼏ߩࠬࠤࠫࡘ࡯࡞߿ㅪ⛊੐㗄ߥߤߩ. ࠍⴕ߁ߎߣ߇ᄙ޿㧚ߎߩߚ߼↹㕙ಾࠅᦧ߃ᤨߩᔕ╵ᕈ. ⾗ᢱࠍឭ␜ߒߚ޿႐ว߽޽ࠆ߇㧘ߘߩ႐วߪઁߩ⊒⴫. ↹௝ࡈࠔࠗ࡞㧔JPEG㧘GIF㧘PNG㧕㧘HTML ᢥᦠ. ⠪ߣห᭽ߦߒߡ⾗ᢱឭ␜ߔࠆߎߣ߽ߢ߈ࠆ㧚. ߇㜞޿ߎߣ߇ⷐ᳞ߐࠇࠆ㧚NetPrez ߢߪࡆ࠶࠻ࡑ࠶ࡊ. ࡊ࡟࠯ࡦࠨ࡯ࡃߢߪ㧘ࠦࡦ࠻ࡠ࡯࡜߆ࠄߩࠦࡑࡦ. ࡈࠔࠗ࡞㧘ࡌࠢ࠲࡯↹௝ࡈࠔࠗ࡞㧔SVG㧕ߣ޿ߞߚࡈࠔ. ࠼ᢥሼ೉ࠍฃߌขࠅ㧘ߘߩࠦࡑࡦ࠼⸃ᨆ⚿ᨐࠍ߽ߣߦ. ࠗ࡞ߦߟ޿ߡߪၮᧄ⊛ߦ㧝ࡈࠔࠗ࡞න૏ߢ⺒ߺㄟߺࠍ. ࠺࡯࠲࠰࡯ࠬ߆ࠄ࠺࡯࠲ࠍขࠅ಴ߒߡ⴫␜ߒߚࠅ㧘⴫. ߔࠆ㧚ߎߩߣ߈㧘↹㕙ಾࠅᦧ߃ߣหᤨߦࡈࠔࠗ࡞⺒ߺ. −20−.

(3) ㄟߺࠍⴕ߁ߣ㧘ૐㅦߥࡀ࠶࠻ࡢ࡯ࠢⅣႺߢ㜞޿ᔕ╵ᕈ. ࠍታ⃻ߢ߈ߥ޿㧚߹ߚ㧘․ߦ SVG ߦߟ޿ߡߪ㧘XML. ߇ଢ೑ߢ޽ࠆ㧚߹ߚ㧘೨ㅀߒߚㅢࠅ㧘⴫␜⾗ᢱߢᵈ⋡. ࡌ࡯ࠬߢ޽ࠆߚ߼ࡈࠔࠗ࡞⺒ߺㄟߺ㧘ࡁ࡯࠼⸃ᨆ㧘࡟ࡦ. ᦠ߈ㄟߺࠍߒߚࠅߔࠆᯏ⢻߽޽ࠆߣଢ೑ߢ޽ࠆ㧚. ߒߡ߽ࠄ޿ߚ޿㗄⋡ࠍࡐࠗࡦ࠻ߒߚࠅ㧘ߜࠂߞߣߒߚ. ࠳࡝ࡦࠣߣ޿ߞߚಣℂߦᤨ㑆߇߆߆ࠆߣ޿߁໧㗴߇޽. ߎࠇࠄߩᯏ⢻ࠍታ⃻ߔࠆߚ߼ߦ㧘ࡊ࡟࠯ࡦࠨ࡯ࡃធ. ࠆ㧚ߎࠇࠄࠍ⸃᳿ߔࠆߚ߼ߦ㧘CashedComponent ࠍ. ⛯↪↹㕙㧘ࡊ࡟࠯ࡦ↪↹㕙㧘↹㕙૏⟎ࠨࠗ࠭ᠲ૞↪↹. ↪ᗧߒ㧘⃻࿷⴫␜ߒߡ޿ࠆࡈࠔࠗ࡞ߩ೨ᓟߩࡈࠔࠗ࡞. 㕙㧘ࡔࡕ⴫␜↪↹㕙ߩࠃ߁ߦ↹㕙ࠍⶄᢙߦಽߌߡ⸳⸘. ࠍࠠࡖ࠶ࠪࡘߔࠆߎߣߦࠃࠅ㧘㜞޿ᔕ╵ᕈࠍታ⃻ߒߚ㧚. ࠍߒߚ㧚ࡊ࡟࠯ࡦࠨ࡯ࡃࠍࠦࡦ࠻ࡠ࡯࡞ߔࠆߚ߼ߩࡊ. ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦߦ߅޿ߡߪ㧘ࠃߊ࡟࡯ࠩࡐࠗࡦ ࠲߇೑↪ߐࠇࠆ߇㧘ߎࠇࠍ࠰ࡈ࠻࠙ࠚࠕ⊛ߦታ⃻ߔࠆ. ࡠ࠻ࠦ࡞ߪ NETPROJ2) ߦ߅޿ߡឭ᩺ߒߚ߽ߩࠍߘ ߩ߹߹ណ↪ߒߡ޿ࠆ㧚. ឭ␜ߔࠆࡊ࡟࠯ࡦ⾗ᢱߩᵹࠇߦߟ޿ߡߪ㧘NetPrez. ߎߣߣ㧘ឭ␜ߒߡ޿ࠆ⾗ᢱ߳৻ᤨ⊛ߥᦠ߈ㄟߺࠍߔ. ࠆᯏ⢻ࠍታ⃻ߔࠆߚ߼ߦ㧘DrawComponent ࠢ࡜ࠬ ࠍ↪ᗧߒߚ㧚CashedComponent ࠢ࡜ࠬߢߪ㧘㧝⇟⋡. ࠪࠬ࠹ࡓߢߪࠗࡦ࠺࠶ࠢࠬࡈࠔࠗ࡞ࠍ޽ࠄ߆ߓ߼↪ᗧ. ߦ DrawComponent ࠢ࡜ࠬࠍㅘ᣿ߥ࡟ࠗࡗ࡯ߣߒߡ㧘. ߔࠆߎߣߦࠃߞߡ೙ᓮߔࠆߎߣߦߒߡ޿ࠆ㧚ࠗࡦ࠺࠶. 㧞⇟⋡ߦ⃻࿷ߩ⾗ᢱࠍឭ␜ߔࠆ Component ࠍਇㅘ᣿. ࠢࠬࡈࠔࠗ࡞ߪᚻరߩࠦࡦࡇࡘ࡯࠲ߦ↪ᗧߒߡ߅޿ߡ. ߥ࡟ࠗࡗ࡯ߣߒߡ㧘㧟⇟⋡ߦ㧝ߟ೨ߩ⾗ᢱࠍឭ␜ߔࠆ. ࡦ࠺࠶ࠢࠬࡈࠔࠗ࡞ߪ㧘࠹ࠠࠬ࠻ࡈࠔࠗ࡞ߦኾ↪ࡈࠜ࡯. Component ࠍࠠࡖ࠶ࠪࡘߒ㧘㧠⇟⋡ߦ㧝ߟᓟߩ⾗ᢱ ࠍឭ␜ߔࠆ Component ࠍࠠࡖ࠶ࠪࡘߒߡ㈩⟎ߔࠆߎ ߣߦࠃࠅ㧘ߎࠇࠄߩᯏ⢻ࠍታ⃻ߒߡ޿ࠆ㧔࿑ 3㧕㧚. ߽⦟޿ߒ㧘Web ࠨ࡯ࡃ਄ߦ↪ᗧߒߡ߅޿ߡ߽ࠃ޿㧚ࠗ. ࡑ࠶࠻ߢ⸥ㅀߔࠆᣇᴺߣ XML ᢥᦠࡈࠔࠗ࡞ߣߒߡ⸥. ㅀߔࠆᣇᴺ߇޽ࠆ㧚NETPROJ ߩ࡝ࡕࠦࡦᯏ⢻ࠍታ. ⵝߒߚ PDA ߩࠃ߁ߥⵝ⟎ߢߪ XML ࡄ࡯ࠨࠍ૶↪ ߔࠆߩߪ⽶⩄߇߆߆ࠆߩߢ࠹ࠠࠬ࠻ࡈࠔࠗ࡞ࠍ૶޿㧘. NetPrez ࠍ೑↪ߔࠆ PC ߩࠃ߁ߥ࡝࠶࠴ࠢ࡜ࠗࠕࡦ ࠻ⅣႺߢߪ XML ᢥᦠࡈࠔࠗ࡞ࠍ૶߃ࠆࠃ߁ߦߒߚ㧚 XML ᢥᦠࡈࠔࠗ࡞ߩ଀ࠍ࿑ 4 ߦ␜ߒߚ㧚. ࿑ 3 CashedComponent ࡟ࠗࡗ࡯ Fig. 3 CashedComponent layer. ࿑ 4 NetPrez XML ᢥᦠࡈࠔࠗ࡞ߩ଀ Fig. 4 Example of NetPrez XML document file. baseuri ࠲ࠣߢߪ㧘⾗ᢱࠍ౏㐿ߒߡ޿ࠆၮᐩߣߥࠆ. 2.3 ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻. ޿㧚߹ߚ㧘ࡊࡠࠫࠚࠢ࠲ߦࠃࠅᛩᓇߐࠇߡ޿ࠆࠬࠢ࡝࡯. URI ࠍ㧘slidenum ࠲ࠣߢߪ㧘⾗ᢱߩᨎᢙࠍ㧘htmlencoding ࠲ࠣߢߪ㧘ࡔࡕߩ MIME ࠲ࠗࡊࠍᜰቯߔࠆ㧚 list ࠲ࠣౝߦߪ㧘⾗ᢱߩ⇟ภߣኻᔕߔࠆ⾗ᢱߣࡔࡕߩ ࡈࠔࠗ࡞ฬࠍᜰቯߔࠆ㧚 ߎߩࠃ߁ߦ㧘ࠗࡦ࠺࠶ࠢࠬᖱႎߣ⾗ᢱࠍ೎ߦߒ㧘㧝. ࡦࠍ౒᦭ߔࠆߚ߼ߦߪ㧘⾗ᢱߩ⴫␜ࠨࠗ࠭ࠍᠲ૞ߢ߈. ᨎߕߟ⾗ᢱࠍ⺒ߺㄟ߻ߎߣߦࠃࠅ㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪ. ߥߌࠇ߫ߥࠄߥ޿㧚ߎࠇࠄߩ೙ᓮᯏ⢻ߛߌߢ޽ࠇ߫㧘. ࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦ㐿ᆎᤨߦ㜞޿ᔕ╵ᕈࠍᓧࠆߎߣ߇. ࠦࡦ࠻ࡠ࡯࡜ߦ߅ߌࠆࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻ ߦߟ޿ߡ⺑᣿ߔࠆ㧚࡙࡯ࠩ߇ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠍ೙ ᓮߔࠆߚ߼ߦߪ㧘ᜰቯߒߚ⾗ᢱࠍ⴫␜ߔࠆ㧘⾗ᢱࠍㅍ ࠆ㧘⾗ᢱࠍᚯߔ㧘ߣ޿ߞߚᠲ૞߇ߢ߈ߥߌࠇ߫ߥࠄߥ. NETPROJ. 2). ߦ߅޿ߡ␜ߒߚߣ߅ࠅ㧘ή✢ LAN ߢ. ࡀ࠶࠻ࡢ࡯ࠢ߳ធ⛯ߒߚ PDA ߢචಽߢ޽ࠆ㧚ߒ߆ߒ. ߢ߈ࠆ㧚ߔߴߡߩ⾗ᢱࠍ⺒ߺㄟ߻߹ߢᓙߟᣇᴺߢߪ㧘. ታ㓙ߦࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠍߔࠆߚ߼ߦߪ㧘ࠬࠢ࡝࡯. ߆ߞߡߒ߹߁㧚. ᨎᢙ߇ᄙ޿⾗ᢱࠍ⺒ߺㄟ߻ߣ㐿ᆎ߹ߢ㐳޿ᤨ㑆߇߆. ࡦ߳⴫␜ߐࠇߡ޿ࠆ⥄ಽߩ⾗ᢱ߿㧘ߘߩ⾗ᢱߦኻᔕߔ ࠆࡔࡕࠍᚻరߩࠦࡦ࠻ࡠ࡯࡜ߢ⷗ࠆߎߣ߇ߢ߈ߚ߶߁. −21−. 2.4 ࠺࡯࠲ឭଏᯏ⢻ ࠺࡯࠲࠰࡯ࠬߦ߅ߌࠆ࠺࡯࠲ឭଏᯏ⢻ߦߟ޿ߡ⺑᣿.

(4) ߔࠆ㧚࠺࡯࠲ឭଏᯏ⢻ߩታ⃻ᣇᴺߣߒߡߪ㧘ࡈࠔࠗ࡞. ࠺࡯࠲↪ߦߪ◲ᤃ HTTP ࠨ࡯ࡃࠍ㧘േ↹ࠬ࠻࡝࡯ࡓ. ࠺࡯࠲↪ߦߪ RTP ࡑ࡞࠴ࠠࡖࠬ࠻㈩ାࠨ࡯ࡃࠍ㧘ࠦ. ࡓኻᔕ߇◲නߦታ⃻ߢ߈ࠆࡊࡠࠣ࡜ࡒࡦࠣ⸒⺆ Java ࠍ. ណ↪ߒ㧘Sun Microsystems ߩ JavaVM 1.4 ࠍ૶ߞߚ㧚 ↹㕙⴫␜ߩߚ߼ߩ࡜ࠗࡉ࡜࡝ߦߪ㧘JavaVM SE 1.4. ࡦࡇࡘ࡯࠲↹㕙ࠗࡔ࡯ࠫ↪ߦߪ㧘SITP ࠨ࡯ࡃࠍ⁛⥄. ߦᮡḰߢណ↪ߐࠇߡ޿ࠆ Swing ࠍ↪޿ߚ㧚߹ߚ㧘SVG. ࠦ࡞ࠍ૶↪ߒߡ޿ࠆߩߢ㧘ઁߩࠨ࡯ࡃ߳⟎߈឵߃ࠆߎ. ߡ޿ࠆ Batik ࠍ↪޿ߚ㧚RTP ߦࠃࠆേ↹ࠬ࠻࡝࡯ࡓ. ߦ૞ᚑߒߚ㧚ߚߛߒ㧘SITP ࠨ࡯ࡃએᄖߪᣢሽࡊࡠ࠻ ߣ߽น⢻ߢ޽ࠆ㧚ߚߣ߃߫㧘HTTP ࠨ࡯ࡃߪ Apache. HTTP ࠨ࡯ࡃߦ⟎߈឵߃ߡ߽⦟޿㧚 SITP ߪ㧘⁛⥄ࡊࡠ࠻ࠦ࡞ߥߩߢ⹦⚦ࠍㅀߴࠆ㧚. NETPROJ2) ߩ߅޿ߡ㧘ឭ␜ߐࠇߡ޿ࠆ⾗ᢱࠍࡑ࡞࠴ ࠠࡖࠬ࠻㈩ାߔࠆߚ߼ߦ㧘NPSIMP(Networked Projector Screen Image Multicast Protocol) ࠍ⸳⸘ߒ ߚ㧚SITP ߪߘߎߢ⸳⸘ߒߚ NPSIMP ࠺࡯࠲ࠣ࡜ࡓ ࡄࠤ࠶࠻㧔⴫ 1㧕ࠍߘߩ߹߹೑↪ߒߡ㧘࡙࠾ࠠࡖࠬ࠻. ࠍ⴫␜ߔࠆߚ߼ߦߪ㧘Apache XML Project ߇㐿⊒ߒ. ㅢାߣേ↹⴫␜ߩߚ߼ߦߪ㧘Sun Microsystems ߇ឭ. ଏߒߡ޿ࠆ Java Media Framework (JMF) ࠍ↪޿ߚ㧚 ߒߚ߇ߞߡ㧘NetPrez ࠍേ૞ߐߖࠆߦߪ㧘ߎߎߢ⚫. ੺ߒߚࠕࡊ࡝ࠤ࡯࡚ࠪࡦߣ࡜ࠗࡉ࡜࡝ࠍࠗࡦࠬ࠻࡯࡞ ߒߡ߅߆ߥߌࠇ߫ߥࠄߥ޿㧚. 3.2 ࡊ࡟࠯ࡦࠨ࡯ࡃ ࡊ࡟࠯ࡦࠨ࡯ࡃߢ૞ᚑߒߚࡄ࠶ࠤ࡯ࠫߩଐሽ㑐ଥࠍ ࿑ 5 ߦ␜ߔ㧚component㧘controller ࡄ࠶ࠤ࡯ࠫߪߘ. ㅢାߢ↹㕙ࠗࡔ࡯ࠫߩォㅍࠍⴕ߁ࡊࡠ࠻ࠦ࡞ߢ޽ࠆ㧚. ࠇߙࠇ↹㕙ࠦࡦࡐ࡯ࡀࡦ࠻ߩࠢ࡜ࠬߣࡊ࡟࠯ࡦ࠹࡯. ⴫ 1 SITP ࡄࠤ࠶࠻᭴ㅧ Table 1 SITP packet. ࠤ࡯ࠫߪ㧘component㧘controller ࡄ࠶ࠤ࡯ࠫߩࠢ࡜. ࡚ࠪࡦ೙ᓮ㑐ଥߩࠢ࡜ࠬ↪ߢ޽ࠆ㧚standalone ࡄ࠶ ࠬࠍ૶↪ߒߡ㧘ో↹㕙⴫␜ߩࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠍታ. ᖱႎ. ↹㕙 ID ⍱ᒻᏀ਄ x ᐳᮡ ⍱ᒻᏀ਄ y ᐳᮡ ⍱ᒻฝਅ x ᐳᮡ ⍱ᒻฝਅ y ᐳᮡ ↹㕙᏷ ↹㕙㜞 ⦡ᖱႎ ࠺࡯࠲ࠨࠗ࠭ ࡇࠢ࠮࡞࠺࡯࠲ ...㧔ࡇࠢ࠮࡞࠺࡯࠲➅㄰ߒ㧕. ࡃࠗ࠻ᢙ. 2 2‫ޓ‬ 2‫ޓ‬ 2‫ޓ‬ 2‫ޓ‬ 4‫ޓ‬ 4‫ޓ‬ 4‫ޓ‬ 4‫ޓ‬ 4‫ޓ‬ ... ‫ޓ‬. ⴕน⢻ߦߔࠆߚ߼ߩࠬ࠲ࡦ࠼ࠕࡠࡦ↪ࠕࡊ࡝ࠤ࡯࡚ࠪ ࡦߩߚ߼ߩࠢ࡜ࠬࠍ฽ࠎߢ޿ࠆ㧚ߎߩࠬ࠲ࡦ࠼ࠕࡠࡦ ↪ࠕࡊ࡝ࠤ࡯࡚ࠪࡦࠍ㆙㓒ᠲ૞น⢻ߦߒߡ㧘ࠨ࡯ࡃߣ. ߒߡേ૞ߔࠆߚ߼ߩࠢ࡜ࠬߪ server ࡄ࠶ࠤ࡯ࠫߦ฽. ߹ࠇߡ޿ࠆ㧚. ↹㕙ォㅍⷐ᳞߇޽ߞߚߣ߈ߦ㧘ࠦࡦࡇࡘ࡯࠲↹㕙ߩ ࠬ࠽࠶ࡊ࡚ࠪ࠶࠻ࠍขࠅㄟߺ㧘↹㕙Ꮐ਄߆ࠄ↹㕙ฝਅߦ ะߌߡ⍱ᒻߢಽഀߒߚ࠺࡯࠲ࠍ㗅⇟ߦォㅍߔࠆ㧚ฃା ஥ߪ㧘㧝↹㕙ಽߩ࠺࡯࠲ߔߴߡࠍฃߌขߞߡ߆ࠄ⴫␜ ࠍᦝᣂߔࠆ㧚↹㕙ᠲ૞ࠍឭ␜ߔࠆ႐ว߿ࠕ࠾ࡔ࡯࡚ࠪ ࡦ⴫␜ࠍォㅍߔࠆ႐วߦߪቢోኻᔕ߇ߢ߈ߥ޿߇㧘߶ ࿑ 5 ࡊ࡟࠯ࡦࠨ࡯ࡃࡄ࠶ࠤ࡯ࠫ Fig. 5 Presentation server package. ߣࠎߤߩࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦߦ߅޿ߡߪ㧘ߎߩࠃ߁ߥ ࠬ࠽࠶ࡊ࡚ࠪ࠶࠻ォㅍߢኻᔕน⢻ߢ޽ࠆ㧚߹ߚ㧘ࡊࡠ ࠫࠚࠢ࠲߳ᛩᓇߒߡ޿ࠆ↹㕙ࠍࡑ࡞࠴ࠠࡖࠬ࠻㈩ାߔ ࠆߚ߼ߦ೑↪ߒߡ޿ࠆ NPSIMP ߣหߓࡄࠤ࠶࠻ࠍ೑. ࡊ࡟࠯ࡦࠨ࡯ࡃߦ߅޿ߡ㧘↹㕙ࠍⶄᢙ⴫␜ߒߡ޿ࠆ. ↪ߒߡ޿ࠆߚ߼㧘ࠬࠢ࡝࡯ࡦࠍߺߡ޿ࠆ⡬⻠⠪ߦኻߒ. ߣ߈ߩࠬ࠽࠶ࡊ࡚ࠪ࠶࠻ࠍ࿑ 6 ߦ␜ߔ㧚ฦ⊒⴫⠪ߩ↹. ߡ߽㧘ࡀ࠶࠻ࡢ࡯ࠢ਄ߢࡑ࡞࠴ࠠࡖࠬ࠻࠺࡯࠲ࠍฃା. 㕙ߪᅢ߈ߥ૏⟎߳ᅢ߈ߥࠨࠗ࠭ߢ⴫␜߇น⢻ߢ޽ࠆ㧚. ߒߡ޿ࠆ࡙࡯߽ࠩหߓࠃ߁ߦ↹㕙ࠍߺࠆߎߣ߇ߢ߈ࠆ. ߎߩ࿑ߢߪ㧘ో↹㕙㧘Ꮐ਄㧘ฝਅߩ㧟↹㕙ࠍ⴫␜ߒߡ. ߣ޿߁ߎߣ߽೑ὐߢ޽ࠆߣ⠨߃ߚ㧚. ޿ࠆ㧚ၮᧄ⊛ߦߪ㧘ⶄᢙੱߩ⊒⴫⠪߇ߘࠇߙࠇ㧝↹㕙 ߕߟ⴫␜ߔࠆ߇㧘NetPrez ߩࠦࡦ࠻ࡠ࡯࡜ߪⶄᢙ୘⿠. 3. NetPrez ߩታⵝ. േߔࠆߎߣ߇น⢻ߢ޽ࠆߩߢ㧘႐วߦࠃߞߡߪ㧝ੱߢ. 3.1 ታ ⵝ Ⅳ Ⴚ NetPrez ߩታⵝߦ޽ߚߞߡߪ㧘ࡑ࡞࠴ࡊ࡜࠶࠻ࡈࠜ࡯. ߎߩ࿑ߩࠃ߁ߦ㧟↹㕙ࠍ⴫␜ߔࠆߎߣ߽ߢ߈ࠆ㧚ࡄࡀ ࡞࠺ࠖࠬࠞ࠶࡚ࠪࡦߥߤߢ㧘มળ⠪߇⴫␜ߔࠆ↹㕙ࠍ. −22−.

(5) ࠦࡦ࠻ࡠ࡯࡞ߒߚ޿႐วߪ㧘ฦ⊒⴫⠪ߩࠦࡦࡇࡘ࡯࠲ ਄ߢ SITP ࠨ࡯ࡃࠍ⿠േߒߚ਄ߢࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ. ޿ࠆ㧚. ࠕࡊ࡝ࠤ࡯࡚ࠪࡦࠍታⴕߒߡ߽ࠄ޿㧘มળ⠪߇ㆡᤨ⊒ ⴫⠪ߩ⾗ᢱ߇⴫␜ߐࠇߡ޿ࠆ↹㕙ࠍ೨㕙ߦߒߚࠅ㧘ో. ࡞ߣ HTML ᢥᦠࡈࠔࠗ࡞ߦኻᔕߒߡ߅ࠅ㧘⴫␜ࡏ࠲. ↹㕙⴫␜ߔࠆߣ޿ߞߚߎߣ߽ߢ߈ࠆ㧚. ࡦࠍࠢ࡝࠶ࠢߔࠆߣ㧘೎↹㕙߇⴫␜ߐࠇ㧘ߘߎߦኻᔕ. ࡔࡕ⴫␜↪↹㕙ߩ⴫␜ߣ㕖⴫␜ࠍಾࠅᦧ߃ࠆࡏ࠲ࡦ ߥߤ߽ߎߩ↹㕙ߦ฽߹ࠇࠆ㧚ࡔࡕߪ㧘࠹ࠠࠬ࠻ࡈࠔࠗ. ߔࠆࡔࡕ߇⺒ߺㄟ߹ࠇࠆ㧚⃻࿷⴫␜ߒߡ޿ࠆ⾗ᢱߣห ᦼߒߡ߅ࠅ㧘ᰴߩ⾗ᢱࠍᜰቯߔࠆߣࡔࡕ߽⥄േ⊛ߦኻ ᔕߒߚࡔࡕߦಾࠅᦧࠊࠆ㧚. 3.4 ࠺࡯࠲࠰࡯ࠬ ࠺࡯࠲࠰࡯ࠬߣߒߡ㧘ࡈࠔࠗ࡞ߦࠃࠆ⾗ᢱࠍ↪޿ࠆ. ႐วߦߪ㧘Web ࠨ࡯ࡃߦ⾗ᢱࠍ㈩⟎ߔࠆ߇㧘ߎߩ⾗. ᢱࠍ◲නߦ૞ᚑߔࠆᔅⷐ߇޽ࠆ㧚ၮᧄ⊛ߦߪ㧘JPEG㧘 GIF㧘PNG㧘HTML ࠍ಴ജน⢻ߥࡊ࡟࠯ࡦ࠹࡯࡚ࠪ ࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦࠍ↪޿ߡ⾗ᢱࠍ૞ᚑߒ㧘ߘߩ⾗ᢱ ࠍෳᾖߔࠆࠃ߁ߦࠗࡦ࠺࠶ࠢࠬࡈࠔࠗ࡞ࠍ૞ᚑߔࠆ߇㧘 ࿑ 6 ࡊ࡟࠯ࡦࠨ࡯ࡃ Fig. 6 Presentation server. 3.3 ࠦࡦ࠻ࡠ࡯࡜ ࠦࡦ࠻ࡠ࡯࡜↹㕙ࠍ࿑ 7 ߦ␜ߔ㧚↹㕙਄ㇱߦߪ㧘ࡊ ࡟࠯ࡦࠨ࡯ࡃធ⛯↪↹㕙㧘ࡊ࡟࠯ࡦ↪↹㕙ߥߤߩಾࠅ ᦧ߃ࠍߔࠆߚ߼ߩ࠲ࡉ߇޽ࠆ㧚ߎߎߢߪ㧘ࡊ࡟࠯ࡦ↪ ↹㕙ࠍ⴫␜ߒߡ޿ࠆ㧚. OpenOffice Impress㧔ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ㧕ࠍ૶߃߫㧘 ߈ࠇ޿ߦ⾗ᢱ⴫␜߇ߢ߈ࠆ SVG ߣࠗࡦ࠺࠶ࠢࠬࡈࠔ ࠗ࡞ࠍ↢ᚑߔࠆ⾗ᢱ૞ᚑᡰេࡑࠢࡠࠍ૞ᚑߒߚ㧚 ߹ߚ㧘JMF ߇ኻᔕߒߡ޿ࠆ Web ࠞࡔ࡜ࠍធ⛯ߒ㧘 RTP ࡑ࡞࠴ࠠࡖࠬ࠻㈩ାࠨ࡯ࡃࠍ⿠േߒߚ PC ࠍ↪ᗧ. ߔࠆߎߣߦࠃࠅ㧘േ↹ࠍឭଏߢ߈ࠆࠃ߁ߦߒߚ㧚ࠦࡦ. ࡇࡘ࡯࠲↹㕙ࠗࡔ࡯ࠫ↪ߦߟ޿ߡߪ㧘SITP ࠨ࡯ࡃ߇ േ૞ߔࠆ PC ࠍ↪ᗧߒߚ㧚PC ߩᕈ⢻ߦࠃࠆ߇㧘Web. ࠨ࡯ࡃ㧘RTP ࡑ࡞࠴ࠠࡖࠬ࠻㈩ାࠨ࡯ࡃ㧘SITP ࠨ࡯ ࡃߩߔߴߡࠍ㧝บߢേ૞ߐߖࠆߎߣ߽น⢻ߢ޽ࠅ㧘೎‫ޘ‬ ߩࠦࡦࡇࡘ࡯࠲ߢേ૞ߐߖߡ⽶⩄ಽᢔߐߖࠆߎߣ߽น ⢻ߢ޽ࠆ㧚. 4. 㑐 ㅪ ⎇ ⓥ 4.1 PowerPoint ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦߩઍ⴫ߣߒߡ ߪ㧘Microsoft PowerPoint ߇޽ࠆ㧚PowerPoint ߢߪ㧘 ⊒⴫⠪ߩࠦࡦࡇࡘ࡯࠲ࠍࡊࡠࠫࠚࠢ࠲߳࠺ࠖࠬࡊ࡟ࠗ ࠤ࡯ࡉ࡞ߢធ⛯ߒߡ૶↪ߔࠆߎߣ߇೨ឭߢ޽ࠅ㧘⾗ ᢱឭ␜↹㕙ࠍࠢ࡝࠶ࠢߒߚࠅ㧘ࠠ࡯ࡏ࡯࠼ߩ࡚ࠪ࡯࠻ ࿑ 7 ࠦࡦ࠻ࡠ࡯࡜↹㕙 Fig. 7 Controller window. ࠞ࠶࠻ࠍ↪޿ߡࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮࠍⴕ߁㧚߹ߚ㧘 ࠺࡯࠲࠰࡯ࠬߪࡈࠔࠗ࡞ߢ޽ࠅ㧘ၮᧄ⊛ߦߪ⊒⴫⠪ߩ ࡠ࡯ࠞ࡞ࡑࠪࡦߦ↪ᗧߔࠆ㧚ࡀ࠶࠻ࡢ࡯ࠢ⚻↱ߢࡈࠔ. ࡊ࡟࠯ࡦ↪↹㕙਄ㇱߦߪ㧘⾗ᢱߩࠗࡦ࠺࠶ࠢࠬ߇଻. ࠗ࡞ࠍ࠳࠙ࡦࡠ࡯࠼ߒߡ೑↪ߔࠆߎߣ߽น⢻ߢ޽ࠆ߇㧘. ߩ URI ࠍᜰቯߔࠆ࠹ࠠࠬ࠻ࡈࠖ࡯࡞࠼ߥߤ߇޽ࠆ㧚↹. ၮᧄ⊛ߦࠬ࠲ࡦ࠼ࠕࡠ࡯ࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦߢ޽ࠅ㧘. ሽߐࠇߡ޿ࠆ࠹ࠠࠬ࠻ࡈࠔࠗ࡞߹ߚߪ XML ࡈࠔࠗ࡞ 㕙ߩᏀߦߪ㧘㧝ߟ೨ߩ⾗ᢱߣ㧝ߟᓟߩ⾗ᢱ߇⴫␜ߐࠇ ߡ޿ࠆ㧚↹㕙ߩਛᄩߦߪ㧘⃻࿷⴫␜ߒߡ޿ࠆ⾗ᢱ߇⴫ ␜ߐࠇߡ޿ࠆ㧚↹㕙ฝ਄ߦߪ㧘⾗ᢱߩࠗࡦ࠺࠶ࠢࠬ߇ ৻ⷩߢ⴫␜ߐࠇߡ߅ࠅ㧘↹㕙ฝਅߦߪ㧘⾗ᢱߩࠗࡦ࠺࠶ ࠢࠬߢᜰቯߒߚ↹㕙߇ࡊ࡟ࡆࡘ࡯ߢ߈ࠆࠃ߁ߦߥߞߡ. NetPrez ߩࠃ߁ߦ㧘⾗ᢱឭ␜ᯏ⢻㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪ ࡦ೙ᓮᯏ⢻㧘⾗ᢱ࠺࡯࠲ឭଏᯏ⢻ࠍࡀ࠶࠻ࡢ࡯ࠢ਄ߢ ಽᢔද⺞ߐߖࠆߎߣߪߢ߈ߥ޿㧚 4.2 Web ࡉ࡜࠙ࠩ Web ࡉ࡜࠙ࠩߪ㧘ࡀ࠶࠻ࡢ࡯ࠢ਄ߩ⾗ᢱࠍ೑↪น. ⢻ߢ޽ࠅ㧘Plugin ᯏ⢻ߦࠃࠅ⼾ንߥ࠺࡯࠲࠰࡯ࠬߦ. −23−.

(6) ኻᔕߒߡ޿ࠆ߇㧘࡝ࡕ࡯࠻ࠦࡦ࠻ࡠ࡯࡞ߔࠆߚ߼ߩ. ⹺ߒߚ޿㧚. ᯏ⢻߇ឭଏߐࠇߡ޿޿ߥ޿ߚ߼㧘ࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊ. ߎߩ⎇ⓥߪᖱႎኅ㔚. 7),8). ߣߒߡߩࡀ࠶࠻ࡢ࡯ࠢ࠼. ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓߢ૶↪ߔࠆߦߪㆡߐߥ޿㧚. ࡊࡠࠫࠚࠢ࠲ࠍኻ⽎ߣߒߡታᣉߒߡ߈ߡ޿ࠆ㧚዁᧪⊛. Web ࡉ࡜࠙ࠩࠍ⚵ߺวࠊߖࠆߎߣߢ NetPrez ߣㄭ޿ ߎߣߪታ⃻ߢ߈ࠆ߇㧘ⶄᢙฬߦࠃࠆ↹㕙㆙㓒ᠲ૞ߢߪ ࡑ࠙ࠬࡐࠗࡦ࠲ߩߣࠅ޽޿ߦߥࠆߚ߼㧘ࡊࡠࠫࠚࠢ࠲ ߩ౒᦭ࠍታ⃻ߔࠆߎߣߪ࿎㔍ߢ޽ࠆ㧚߹ߚ㧘࡟࡯ࠩ࡯ ࡐࠗࡦ࠲ߩ࠰ࡈ࠻࠙ࠚࠕߦࠃࠆታ⃻߿㧘ࡔࡕߩㅪേ⴫. ߦߪ㧘⾗ᢱឭ␜ᯏ⢻ࠍ⚵ߺㄟࠎߛࡀ࠶࠻ࡢ࡯ࠢኻᔕߩ. VNC5),6) ߥߤߩ↹㕙㆙㓒ᠲ૞↪ࠕࡊ࡝ࠤ࡯࡚ࠪࡦߣ. ᖱႎኅ㔚ࡊࡠࠫࠚࠢ࠲ߩ㐿⊒㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ ᓮᯏ⢻ࠍᜬߟࠕࡊ࡝ࠤ࡯࡚ࠪࡦߩዊဳ୘ੱᖱႎ┵ᧃ߳ ߩ⒖ᬀ㧘⾗ᢱ࠺࡯࠲ឭଏᯏ⢻ࠍᜬߟ᭽‫ߥޘ‬ᖱႎኅ㔚ᯏ ེߩ㐿⊒߳ߟߥߍߚ޿ߣ⠨߃ߡ޿ࠆ㧚. ෳ ⠨ ␜ߣ޿ߞߚࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻ࠍឭଏߔࠆߚ ߼ߦߪ㧘ኾ↪ࠕࡊ࡝ࠤ࡯࡚ࠪࡦߩ㐿⊒߇ᔅⷐߣߥࠆ㧚. 4.3 DACS DACS ࠍ↪޿ߚࡊࡠࠫࠚࠢ࠲౒↪ᡰេࠪࠬ࠹ࡓ߇ ឭ᩺ߐࠇߡ޿ࠆ 4) 㧚ߎߩ⎇ⓥߩਥߥ⋡⊛ߪ㧘ળ႐ߦ ሽ࿷ߔࠆࡔࡦࡃࠍ⥄േ⊛ߦ⹺⼂ߒ㧘ߘߩࡔࡦࡃ߇ࡊࡠ ࠫࠚࠢ࠲ࠍ౒↪ߢ߈ࠆࠃ߁ߦേ૞ߔࠆࠪࠬ࠹ࡓߢ޽ࠅ㧘. NetPrez ߩࠃ߁ߦࡀ࠶࠻ࡢ࡯ࠢ਄ߢࡊ࡟࠯ࡦ࠹࡯࡚ࠪ ࡦߩᯏ⢻ࠍಽᢔද⺞ߔࠆࠪࠬ࠹ࡓࠍ᭴▽ߔࠆߩߣߪ⋡ ⊛߇㆑߁㧚ታ㓙ߦ㧘࡙࡯ࠩ࠙ࠖࡦ࠼࠙ߩ࿁ォߦࠃࠅࡊ ࡠࠫࠚࠢ࠲↹㕙ࠍ౒᦭ߔࠆὐ߿㧘ឭ␜⾗ᢱߪࡈࠔࠗ࡞ ォㅍߔࠆߎߣߦࠃࠅ㧘ࠪࠬ࠹ࡓࠍታ⃻ߔࠆὐߥߤߦᧄ ⎇ⓥߣߩᏅ߇⴫ࠇߡ޿ࠆ㧚. 5. ߹ ߣ ߼ એ਄ߩࠃ߁ߦ㧘NetPrez ࠍ೑↪ߔࠆߎߣߦࠃࠅ㧘ࡀ࠶ ࠻ࡢ࡯ࠢࠍ᦭ലߦ೑↪ߒߚࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ߇น⢻ ߣߥࠆ㧚NetPrez ߩ․㐳ࠍએਅߦ߹ߣ߼ࠆ㧚. • ⶄᢙߩ⊒⴫⠪ߢࡊࡠࠫࠚࠢ࠲ࠍ౒᦭ • ↹㕙ࠨࠗ࠭‫↹ޔ‬㕙૏⟎ࠍ⥄↱ߦᜰቯน⢻ • ࡀ࠶࠻ࡢ࡯ࠢࠍ૶ߞߡ࡝ࡕ࡯࠻ࠦࡦ࠻ࡠ࡯࡞ • ࡀ࠶࠻ࡢ࡯ࠢ਄ߩ⾗ᢱࠍ೑↪น⢻ • ⼾ንߥ࠺࡯࠲࠰࡯ࠬߦኻᔕ ᓥ᧪ߩࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠕࡊ࡝ࠤ࡯࡚ࠪࡦߦ߅޿ ߡߪ㧘⊒⴫⠪ߩࠦࡦࡇࡘ࡯࠲ࠍࡊࡠࠫࠚࠢ࠲߳ធ⛯ߒ ߡ૶↪ߔࠆߎߣ߇೨ឭߣߥߞߡ޿ߚߚ߼㧘ࠦࡦ࠻ࡠ࡯ ࡜ߣឭ␜↹㕙߇৻૕ߢ޽ߞߚ㧚߹ߚ㧘࠺࡯࠲࠰࡯ࠬߪ ⊒⴫⠪ߩࡠ࡯ࠞ࡞ࡑࠪࡦߦ⟎޿ߡ߅ߊߎߣ߇᥉ㅢߢ ޽ߞߚ㧚. ߎࠇߦኻߒ NetPrez ߪ㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪࠬ. ࠹ࡓࠍࡀ࠶࠻ࡢ࡯ࠢኻᔕߦߔࠆߣ޿߁ⷞὐ߆ࠄ㐿⊒ ߒ㧘⾗ᢱឭ␜ᯏ⢻㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦ೙ᓮᯏ⢻㧘⾗ ᢱ࠺࡯࠲ឭଏᯏ⢻ߣᄢ߈ߊ㧟ߟߦಽߌߡࡀ࠶࠻ࡢ࡯ࠢ ਄ߦಽᢔߐߖ㧘ද⺞േ૞ߐߖࠇ߫㧘ࡊ࡟࠯ࡦ࠹࡯࡚ࠪ ࡦߦ߅ߌࠆෳട⠪߿⁁ᴫߦᨵエߦኻᔕน⢻ߥࡊ࡟࠯ࡦ. ᢥ. ₂. 1) ਛፉ๟‫ޔ‬቟⮮ผ㇢‫᧛ޔࡦࡂ࡮ࡦ࠻࡮ࡦࠖࡈޔ‬਄๺ 㓉‫◉ޔ‬ፒ㓷⧷‫ޔ‬㤥Ỉ㓉㧦౒᦭࠙ࠖࡦ࠼࠙ߣേ↹ࠍ ↪޿ߚ㆙㓒ࡑ࡞࠴ࡔ࠺ࠖࠕࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦࠪ ࠬ࠹ࡓ, ᖱႎಣℂቇળ⺰ᢥ⹹, Vol.34, No.6, pp. 1371—1384 (June 1993). 2) ዊጊඳผ, ᄥ↰㓉ඳ: ࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊࡠࠫࠚࠢ ࠲ NETPROJ ߦ㑐ߔࠆⷐ᳞᧦ઙߩᬌ⸛, ᖱႎಣ ℂቇળ⎇ⓥႎ๔, 2002-IAC-2, pp. 67—72 (2002). 3) ዊጊඳผ, ᄥ↰㓉ඳ: ࡀ࠶࠻ࡢ࡯ࠢ࠼ࡊࡠࠫࠚࠢ࠲ ࠍ೑↪ߒߚࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦߩᢎ⢒⊛ലᨐߦߟ ޿ߡ, ᖱႎಣℂቇળ⎇ⓥႎ๔, 2002-CE-66, No.96, pp. 25—30 (2002). 4) ᄢ⩲ ⋥ੱ‫ޔ‬ਛ↰ ᗲℂ‫ޔ‬ᐔጊ ᜏ‫ޔ‬ችᧄ ⌀ℂሶ‫ޔ‬ጟ ↰ ⻞৻㧦ද⺞૞ᬺߦ߅ߌࠆ, ࡊࡠࠫࠚࠢ࠲౒↪ᡰ េࠪࠬ࠹ࡓ, ᖱႎಣℂቇળ⎇ⓥႎ๔, 2002-GN-45, No.45, pp. 119—124 (2002). 5) Tristan Richardson, Quentin Stafford-Fraser, Kenneth R. Wood, Andy Hopper: Virtual Network Computing, IEEE Internet Computing, Vol. 2, No. 2, pp. 33—38 (1998). 6) Tristan Richardson, Kenneth R. Wood: The RFB Protocol Version 3.3, Revised, (1998). 7) ⟤Ớዉᒾ, ਛ᧛⚛ౖ㧦 ᖱႎኅ㔚ߩ⠨߃ᣇ, ᖱႎಣ ℂ, Vol.42, No.11 (Nov. 2001) 8) ㊍ᳯዏᒾ㧦ࡑ࡞࠴ࡔ࠺ࠖࠕࡎ࡯ࡓࠦࡦࡇࡘ࡯࠹ࠖ ࡦࠣߩᧂ᧪, ╙㧝࿁㨪╙㧟࿁, ᖱႎಣℂ, Vol.41, No.7-9 (July-Sep. 2000). 9) Ken Arnold, James Gosling, David Holmes: The Java Programming Language Third Edition (2000). 10) Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides: Design Patterns, Elements of Reusable Object-Oriented Software, AddisonWesley (1995). 11) Sun Microsystems: Java2 SDK Standard Edition Documentation Version 1.4.0, http://java.sun.com/j2se/1.4/docs/, Sun Microsystems (2002). 12) ዊጊඳผ: ࡊ࡟࠯ࡦ࠹࡯࡚ࠪࡦᡰេࠪࠬ࠹ࡓߦߟ ޿ߡ, ♿ⷐ, 㐳㊁⋵Ꮏ⑼⍴ᦼᄢቇᩞ (2001).. ࠹࡯࡚ࠪࡦࠪࠬ࠹ࡓࠍ᭴▽ߢ߈ࠆߎߣࠍ␜ߒߚ㧚੹ᓟ. ߪ㧘ታ㓙ߦ NetPrez ࠍ೑↪⹏ଔߒ㧘ߘߩ᦭ലᕈࠍ⏕. −24−.

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