Tin tuc tren web hien nay nhieu vo ke va ban khong the nao co du thoi gian de doc het. Co mot so cong cu va dich vu web co the giup ban kiem soat hieu qua nguon thong tin vo cung phong phu nay. Cong nghe tien bo nhanh chong nhung thong tin con phat trien nhanh hon. Kho ma theo kip dong thac tin blog va cac nguon tin tren Internet hien nay neu nhu ban chi dung trinh duyet web thong thuong. Giai phap cho van de nay la nhung dich vu giup sang loc tin tuc hieu qua va cac trinh doc tin (TDT) cho phep dang ky nhan tin de doc nhu email.
Gan nhu tat ca cac giai phap loc tin tren web deu dua tren nguon tin dang RSS (Really Simple Syndication) - dinh dang XML dac biet dung de quang ba nhanh thong tin tom luoc cua bai viet, tin blog... Nguon tin RSS thuong duoc nhan dien bang ky hieu "XML" hay "RSS" mau cam tren cac website. Sau khi nhap nguon tin (nhan chuot phai len ky hieu "XML" de lay dia chi lien ket) vao TDT, trinh nay se dinh ky kiem tra nguon tin de lay tin moi. Nhung TDT tot cho phep ban duyet qua cac site chi mat nua thoi gian so voi dung trinh duyet. Neu phat hien tinh trang "spam" o mot nguon tin nao do, ban co the ngung khong lay tin tu no nua.
Mac du cac TDT giup duyet tin nhanh nhung chung co the lam ban mat nhieu thoi gian de doc tin hon truoc day vi ban se de bi cam do dang ky cang nhieu nguon tin hon. Do chinh la ly do xuat hien cac site loc tin. Loc tin Dua vao cau truc thong tin trao doi tren Internet, thoi quen doc tin cua ban va thoi quen duyet web cua nhung nguoi co cung khuynh huong, mot bo loc tin tot co the giup ban di ngay den tin ma ban quan tam. Tuy nhieu site loai nay van con chua hoan thien nhung phan lon dang de them vao danh sach site tin tuc chu chot cua ban.
Techmeme (techmeme.com) la mot trong nhung site tot nhat thuoc loai nay. Site nay (truoc day la tech.memeorandum) tu phong la "Trang A1" (hang dau) cua the gioi blog cong nghe, cung cap tin duoc nhieu nguoi quan tam nhat trong ngay. Techmeme truy cap lien tuc nhung nguon tin (website, blog) cong nghe hang dau de nhan dien nhung tin duoc lien ket den nhieu nhat va nhung thao luan cung nhu cac tin lien quan.
Day la noi tap hop cac tin cong nghe moi nhat tren web va cung la noi tuyet voi de tim blog cung cap nguon tin. Gabe Rivera, chu so huu duy nhat cua site nay, ap dung thuat toan de tao cac bo loc tin chuyen ve chinh tri (Memeorandum.com), bong chay (Ballbug.com) va ve nhung nguoi noi tieng (WeSmirch.com), tac gia con du dinh tiep tuc bo sung nhung chu de moi.
Mot website tuong tu co ten TailRank (tailrank.com) co gang tao "to bao" hang dau dac biet huong den cac moi quan tam cua ban, dua tren cac nguon tin ma ban yeu cau thu thap. No se dem so cac site lien ket den cac tin trong nguon tin cua ban va dua ra cac tin theo muc do pho bien. TailRank con co mot phien ban ca nhan hoa co tinh nang "nguoi thich tin X cung thich tin Y" cua Amazon.com, dua tren co so so sanh cac nguon tin cua ban voi nhung nguoi khac.
Tuy TailRank khong khon kheo bang Techmeme trong viec loc nhung tin trung va dam bao cac lien ket lien quan that su, nhung no co mot tinh nang rat huu ich: khi nhan vao mot nut, TailRank se kiem tra history, cache hay cookie trinh duyet cua ban de xac dinh nhung blog hay site tin tuc ma ban truy cap gan day va cho ban bo sung vao danh sach nguon tin. Giam sat viec doc tin Co ba site khac ap dung giai phap thong minh hon de dieu chinh tin tuc theo so thich bang cach kiem tra tin ban da doc. Google News (news.google.com) co le la cai ten noi tieng nhat trong so nay. Sau khi ban dang nhap voi Google ID, site nay se giam sat thoi quen xem tin va tim kiem tren web cua ban de dieu chinh cac tin hien thi tren trang Google News. Cac thay doi tuy bien ca nhan thuc hien cham va khong duoc danh dau ro rang nhung site nay lam tot viec hien thi noi bat cac tin quan trong nhat va moi nhat ma khong can co nguoi nhung tay vao. Nhan lien ket "Standard News" de xem su khac biet giua cac trang mac dinh va tuy bien ca nhan.
Findory (findory.com) su dung phuong phap tuong tu nhung cho phep ban bo sung danh sach site tin cua minh. Trong "tich tac", site nay thay the loat tin du loai mac dinh cua no bang cac tin ma ban quan tam. Nhung khong co cach nao de site nay biet nhung tin ma ban khong quan tam.
Spotback giup de dang truy cap nhung chu de ma ban quan tam
Tuy nhien, ban co the lam dieu do voi Spotback (spotback.com), mot site vua ra mat vao thang 5 va cung cap nhieu phuong thuc de ban dieu chinh cac tin can xem. Mot thanh truot cho phep ban chi dinh muc do quan tam voi tung tin theo thang diem tu -5 den +5. Ngoai ra, con co menu so xuong Less" va "More" de ban chan hay yeu cau nhieu tin hon tu mot nguon tin hay nhom chu de nao do.
Giao dien nguoi dung xuat sac cua Spotback dat mau nen vang ben duoi nhung tin ban da doc va khi xep hang mot tin ban se nhan duoc phan hoi tuc thoi: site nay su dung ky thuat Ajax de chen vao tin bai co lien quan ngay ben duoi tin ma ban vua cho diem. Tiec la Spotback co van de ve thoi gian dua tin. Phan "Computers and Internet" thinh thoang dua nhung tin cu 6-7 ngay - vo cung lac hau o thoi dai tin truc tuyen. Tri tue cua so dong Binh chon cua doc gia tao nen su pho bien rong rai cua cac site tin tuc cong tac, nhung site dung tri tue cua cong dong doc gia de xep hang tin. Site Digg (digg.com) nho ky thuat nay ma tro thanh site tin tuc cong nghe pho bien qua mat ca dan anh Slashdot (slashdot.org).
Ky thuat cua Digg het suc don gian: nguoi dung gui cac lien ket va nhung nguoi dung khac binh luan va cho diem. Theo ly thuyet, tin nao duoc diem cao nhat se nhay len trang dau. Digg co ke hoach mo rong mo hinh nay cho loai tin khac ngoai cong nghe.
Thanh cong cua Digg da tao nen mot so "ban sao" kha thu vi. Fantacular (fantacular.com) la site bat chuoc kha sat, chi tap trung ve tin cong nghe. Gather.com la site blog cong tac voi du cac muc tu tho van den thuc pham.
CrispyNews (crispynews.com) va Reddit (reddit.com) the hien tuong lai cua cac bo loc tin cong dong. CrispyNews cho phep nguoi dung tao rieng bo loc cong dong thu nho bao gom nhung chu de hep. Reddit, mot site giong Digg, tap trung vao nhung tin moi va pho bien tren web, trang chinh cua no co them dich vu de cu dua tren so thich cua ban va hien thi noi bat nhung tin ma nhung nguoi dung co thoi quen doc tin tuong tu da binh chon. Reddit co tham vong phan tich noi dung cua tin cung nhu sieu du lieu va tu khoa. Kiem soat tin Day la dieu tuyet voi cua cac site loc tin: Mot khi su dung chung thanh thao, ban co the dung dau ra cua chung lam nguon RSS cho TDT doc lap de thuc hien nhieu dieu khien hon.
Day la cach hieu qua nhat de tuy bien luong tin tuc. Truoc het chon TDT cho tai ve hay truc tuyen de lam viec, su dung no de tao danh sach nguon tin cua ban. Ban se co kha nhieu lua chon, gom cac trang chu co the tuy bien (xem "Netvibes so voi My Yahoo"), TDT lam viec tren web, phan mem chuyen dung cho phep ban tinh chinh tung nguon tin hay tin, tham chi cac trinh email va trinh duyet web co ho tro RSS. Hau het TDT deu cho phep xuat danh sach nguon tin ua thich cua ban ra tap tin van ban co duoi la .opml de co the nhap tap tin .opml nay vao TDT bat ky nao khac. 
Bloglines cung cap bo suu tap nguon tin huu ich cho nguoi moi lam quen
Radio Userland (radio.userland.com) da giup thuc day dinh dang RSS vao thoi ky dau va hien no van lam viec. Mac du yeu cau tai ve, Radio Userland lam viec nhu TDT truc tuyen, liet ke tat ca tin trong 1 cot, theo thu tu thoi gian nguoc. Dang nay duoc goi la giao dien "dong tin", tuong tu nhu giao dien hop thu inbox cua hau het trinh email.
Nhieu chuong trinh khac, bao gom Google Reader (reader.google.com), da di nguoc lai giai phap don gian nay. Ve nhieu phuong dien, Google Reader la TDT tuong duong Gmail. No hoan toan khong dung folder, lam viec cuc nhanh nho su dung ky thuat lap trinh Ajax. Nhung cung nhu Gmail, cac tuy bien cua Google Reader han che. Vi du, ban chi co the sap xep tin theo ngay hay theo thuat toan rieng cua Google.
Bloglines (bloglines.com) thich hop cho nguoi moi lam quen voi TDT, dich vu truc tuyen nay duoc Ask.com mua lai vao nam 2005. Ban can co dia chi email de dang ky su dung, site co san cac nguon tin cho nhung nhom nguoi dung cu the (vi du, Bookworm cho nguoi me sach, Conservative Politico danh cho nguoi quan tam den chinh tri, Parental Unit danh cho cac bac cha me...), man hinh doc tin co 2 khung hien thi cac folder de cau hinh o ben trai va tin o ben phai.
Tinh nang hay nhat cua Bloglines la cung cap dia chi email khong gioi han dung de dang ky danh sach nhan tin. Tin co the gui email, luu hay ghi blog. Site lam viec chua duoc nhanh lam va can co nhieu tuy chon hien thi hon. Bloglines con co phien ban di dong dung de gioi thieu blog rat hay va trinh bao tin cho tai ve.
TDT truc tuyen canh tranh Rojo (rojo.com) cung co cac nhom nguoi dung thiet lap truoc va chap nhan tap tin .opml, cho phep ban dang ky them nguon tin cua minh. Rojo mac dinh hien thi cac tin lien quan duoc xac dinh theo so nguoi dung binh chon. Ngoai ra con co tuy chon hien thi theo loai tin va theo thoi gian.
Rojo gan day bo sung tab Today hien thi nhung tin hien duoc nhieu nguoi quan tam, tuy nhien gia tri cua no con han che vi moi chi co it nguoi dung Rojo binh chon; cong cu "bookmarklet" cho phep dang ky nhanh cac site khi duyet web. Rojo la TDT truc tuyen tot nhung khong cho phep sap xep lai cac tin theo nhung folder khac nhau va khong co trinh bao tin. TDT truc tuyen dung Ajax Bloglines va Rojo deu tot, nhung con co cac site khac hay hon nho biet khai thac nhung ky thuat lap trinh web hien dai nhu Ajax.
Vi du, Alesti (alesti.org) dungAjax de tao TDT truc tuyen co 3 khung theo kieu Outlook, cho phep ban duyet nhanh qua cac folder nguon tin. No tao duoc an tuong tot nhung con can phai hoan thien: chang han khi nhan nut back cua trinh duyet, ban "vang" khoi site nay thay vi quay lai tin vua doc. Alesti cung con thieu mot so tinh nang co ban nhu gui email tin.
Bloxor (bloxor.com) la TDT truc tuyen nguon mo dung Ajax. No chi lam viec voi cac trinh duyet dua tren Gecko (ten ma thu vien trinh duyet) nhu Firefox va Mozilla va duong nhu huong den cong dong hacker tre tuoi (ten chinh thuc cua site nay la "t3h Blox0r"). TDT 3 khung nay khac biet voi cac TDT khac boi kha nang chuyen doi de dang thanh dang 3 cot va dang ke hon la kha nang lay tin truc tiep tu website goc thay vi lay noi dung text cua tin tu nguon XML. Tuy giai phap nay khong phai luc nao cung tot nhung cac tin doc trong moi truong binh thuong cua no trong de chiu. Site nay thieu mot so tinh nang co ban nhu email va ghi blog, nhung neu ban muon TDT toc do trong khi van nhin thay cac site o dang HTML goc cua chung thi day la lua chon tot.
SpeedFeed Reader cua Gritwire (gritwire.com) chon Flash de thuc hien TDT 3 khung co giao dien kha dep. Tiec la no thieu cac tuy chon cau hinh va doi khi bi dung khi nhap nguon tin RSS 1.0. No cung bi nhung han che cua Flash, nhu thoat khoi chuong trinh neu vo tinh nhan nut back. Lay tin moi noi Neu ban thich giai phap doc tin di dong, hay thu NewsGator Online (newsgator.com). Site NewsGator co TDT tich hop va co the ket hop voi thu vien Outlook cua NewsGator hay TDT tren PC nhu FeedDemon (da duoc NewsGator mua lai). No co cac tinh nang email va danh dau tot cung nhu giao dien dang folder hay "dong tin" gon gang. Site NewsGator khong duoc thiet ke giong ung dung client (chay tren PC) va lam viec kha cham khi chuyen tu nguon tin nay sang nguon tin khac. Khong giong nhieu TDT truc tuyen khac, no cho phep ban tao folder va di chuyen tin giua chung, dong bo cac thay doi cua ban voi phan mem client cua no.
Nguoi dung khong dang ky nhan duoc 1 tai khoan email mien phi (nguoi dung co phi nhan duoc 5) de dang ky nhan tin hay tao nguon tin RSS dung chung. Nguoi dung NewsGator co the chuyen 1 tim kiem tu khoa tren web thanh nguon tin (nguoi dung co phi chuyen duoc 5). Dich vu nay cung co trinh client di dong, truy cap POP3 va cac cong cu cho blogger va cho nguoi dung muon dong bo podcast va videocast voi PC hay thiet bi di dong.
Mac du co tinh nang phong phu, nhung site nay lam viec cham va thieu co che tim kiem nen kho dung; no chi dang quan tam nhu la bo sung cho thu vien Outlook cua NewsGator hay FeedDemon.
Phan mem chinh thong Voi nhu cau doc tin RSS co ban, ban co the khong can gi khac hon trinh duyet web dang tin cay. Xem phan "Trinh dyet ho tro RSS: IE 7 Beta 2 so voi Firefox (voi Sage) so voi Opera". Tuy nhien, voi nhu cau doc tin "chuyen nghiep" thi ca trinh duyet va dich vu truc tuyen deu khong du nhanh cung nhu cau hinh khong du linh hoat bang trinh client tai ve. Ngay ban beta nhu SharpReader (sharpreader.net) cung da hieu qua hon nhieu trong viec di chuyen nhanh giua cac nguon tin so voi TDT truc tuyen tot nhat. Mac du co the ton nhieu bo nho nhung SharpReader co cac cua so thong bao va ho tro phan loai tuyet voi, lai co the hien thi nhung tin duoc lien ket tu cac nguon khac - dau hieu ve muc do quan trong cua tin. Phan mem nay cung thuc hien tot viec nhan dien duong dan nguon tin RSS khi ban nhap vao dia chi URL cua mot site.
Awasu (www.awsu.com) lai la mot buoc tien bo khac. Phien ban mien phi cua no bao gom TDT 3 khung trau chuot va nhieu tinh nang voi trinh duyet day du trong khung thu ba co kha nang duyet tab giup de dang quay lai nguon tin truoc do. Awasu cung cho phep tim cac nguon tin nhanh chong va trong so hang loat tuy bien cua no co cac thu vien cho phep thiet lap tim kiem Google, luu cac tap tin multimedia vao thu muc dinh truoc va dang ky cac nhom tin cua Yahoo. Khuyet diem duy nhat cua Awasu la thieu cac lenh ban phim va co khuynh huong ngon nhieu tai nguyen he thong. Phien ban co phi (29 USD) khong bi nhung han che ve so thu vien va nguon tin, cho phep nguoi dung dang ky nguon tin co bao ve bang mat khau.
FeedDemon 2.0 cua NewsGator xung dang voi cai gia 30USD. No lam viec rat nhanh, khong ton nhieu bo nho va ket hop nhieu tuy chon bo tri giao dien truc quan voi mot loat tuy chon dap ung phong cach doc tin cua ban.
Cong cu send-to cho phep ban de dang gui tin den site danh dau cong tac Del.icio.us, sao chep no vao bo nho tam hay gui email, ghi blog. Khung thu hai ho tro nhieu tab co the dung de nap nguon tin hay hien thi tin duoc chon theo dang duyet web, ban co the dua tin vao Favorites cua IE. Khuyet diem dang ke duy nhat cua chuong trinh nay la thu tu sap xep nguon tin theo chu cai khong thay doi duoc va phuong thuc mo tin cung nhac trong mot tab moi. Day chi la nhung loi nho nhat. Thiet ke doc dao va tinh nang phong phu cua FeedDemon, ket hop voi kha nang dong bo nhieu may tinh va TDT di dong cua NewsGator lam cho FeedDemon tro thanh ung dung doc tin so 1. Tin nhu mail Mot so chuong trinh, nhu News Gator Inbox 2.6, ket hop cac nguon RSS voi email. Qua trinh cai dat News Gator Inbox don gian, co tuy chon tien loi de dua vao cac loai nguon tin cho truoc. Tuy nhien, qua trinh nhap vao nhieu nguon tin ton bo nho va mat nhieu thoi gian.
Mot ung dung thu vi khac, Omea Reader, la mot phan cua goi san pham day tham vong voi giai phap tong hop. No co the lam viec nhu TDT doc lap, hay tich hop voi Omea Pro gia 49 USD de tro thanh trinh email, trinh doc RSS, trinh duyet web, lich lam viec, trinh IM va ung dung tim kiem desktop.
Omea Pro co mot so tinh nang xuat sac, nhu co tab cho phep doc cac nguon tin theo tung hang, nhieu vung lam viec de tach biet cac du an va mot trinh quan ly dia chi email.
Cac cong cu kiem soat tin tuc noi chung van con so khai va can tiep tuc duoc cai tien. Trong khi cho giai phap hoan hao, co le cach tot nhat la ket hop nhieu giai phap de khai thac nhung tinh nang hay. Lay cac nguon RSS tu cac site cong tac nhu Digg dua vao cac site de cu nhu TailRank hay Findory roi lay nguon tin tuy bien rieng de dung cho TDT ma ban ua thich; ban se co duoc hau het nhung tin can thiet ma khong phai mat ca ngay luc loi. PC World VN Article source http://w4rum.com/251.t
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