TAP CHl KHOA HOC VA C O N G NGHE SO 5 • TRU''''ONG OAI HOC PHAM VAN B O N G KHAI PHA Dtr LIEU TREN HE QUAN LY KHOA HQC TRlTC TUYEN MOODLE M Q T TRlTOtNG HOP NGHIEN CUtJ Trdn Tdn Tie, Nguyen Thi DUng TOM[.]
Trang 1KHAI PHA D t r LIEU TREN HE QUAN LY KHOA H Q C
TRlTC TUYEN MOODLE - M Q T TRlTOtNG HOP NGHIEN CUtJ
Trdn Tdn Tie, Nguyen Thi DUng
T O M TAT
Npi dung bdi bdo tdng hgp cdc kit qud nghien cuu vi khai phd die lieu ciia khoa hpc true tuyin qua viic thuc hien trin mpt tru&ng hpp cu thi cua mot khda hpc tren Moodle v&i mdt cdng cu khai phd die lieu cu thi Id phdn mim ma ngudn m& Weka Ben cgnh do chimg tdi cdn rut ra duoc mpt sdy nghia m&i me cua khai phd die lieu tren khda hpc true tuyen so vai cdc kit qud da co
Tu- khda: Moodle khai phd die lieu, thdng ke, lugt kit hap phdn cum, phdn l&p
1 M O DAU
Ngdy nay vi6c hoc tdp dua tren web
dang dugc phat tridn manh me He thdng
E-Ieaming nhu vdy tiiy theo chuc nang
cua chiing, dugc quan niSm Id mdt he
thdng qudn \<^ hgc tap (LMS), He thdng
quan Iy khda hgc (CMS), He thdng qudn
ly ngi dung hgc tap (LCMS), M6i trudng
qudn Iy hgc tap (MLE), He th6ng h§ trg
hgc tdp (LSS) Cdc h8 th6ng ndy co th6
eung cdp mdt loat ede kenh vd khdng gian
Iam viec d l tao dieu kien chia se thong tin
va Ii6n lac giira cac thanh vien trong mdt
khda hgc, de eho cae nhd Su pham truyen
dat thdng tin den sinh vi6n, tao tdi lieu hoc
tap, chudn bj bdi tdp va bai kiem tra, tham
gia vao cac cugc thao ludn, qudn Iy cac
Idp hgc tir xa vd cho phep hgc nhdm qua
ede diin dan, cac cugc trd ehuyen, khu
vyc luu trff thdng tin, dich vu tin tuc,
Hien nay, mdt trong nhihig h6 thdng
thudng dugc su dung d nudc ta cd the noi
Id Moodle, m^t LMS miin phi, cho phep
tao ra cdc khda hgc vd nhung trdi nghiem
true tuyen m^nh me, linh hoat vd hap dan
Nhung he thdng E-leaming nay tich luy
mdt sd lugng Idn eac thdng tin rdt cd gia
tri cho viec phan tich hanh vi cua sinh
vien va e6 the tao ra mdt kho du lieu vang
cho giao due H6 thdng qudn Iy hoc tdp tich luy mdt lugng ldn dd lieu nhat ky ve cac hoat d6ng cua sinh vi8n N6 cd the ghi lai bat cu hoat d6ng ndo ma sinh vien eo lidn quan, chdng han nhu dgc sach, vi6t bai, tham gia kiem tra, thuc hien nhiem vu khae nhau, vd tham chi Id ede giao tiep vdi ban cung hgc He thdng nay eung cung cap mot ea sd dd lieu luu tru tdt cd thdng tin ciia he thdng: Thong tin ca nhdn vS ngudi diing (hd sa), k^t qua hgc tdp, dd lieu tuang tae eua ngudi diing, Tuy nhien, vdi mdt lugng Idn du lieu ciia he thdng se rdt khd khan trong quan ly, vi vay can cd eac cdng cu cd the ho trg qudn
Iy tdt han Mac du mdt so he thong e6 eac dng dung eung cdp mdt sd cdng eu bdo cao, nhung khi co mdt sd lugng ldn sinh vi6n, no trd nen khd khdn cho gido vien d£ trich xudt ede thdng tin hdu ich Cdc he thdng phan ldn khdng cung cdp cac cdng
cu cu thS cho phep giao vien theo d5i ky ludng va danh gia tdt ca cdc hoat ddng dugc thuc hi§n bdi sinh vien ciia ho cung nhu ddnh gia cau tnic vd n5i dung eiia khda hgc, hifiu qud cua khda hgc trong qua trinh hpc tdp Mgt giai phap ddy hua hen de c6 th6 dat dugc muc tieu nay Id
Trang 2viec dng dung cac ki thudt khai phd du
lieu
CiJng da CO rdt nhilu cong trinh
nghien cuu v6 cac dng dung ciia khai phd
dd heu trong khoa hgc E-Leaming nhdm
nang cao hieu qua day va hoe nhu ([1],
[2], [3], [4], [5]) Trong bai bao ndy,
chiing toi se dfi cap dSn mot trudng hgp
nghien cdu cua qua trinh khai phd dd liSu
tren m6t khoa hoc cu th6 tren he qudn Iy
khoa hoc Moodle vdi phdn mem Weka
Dir li6u dp dung cho qua trinh khai pha Id
dd lieu cua khoa hgc Tin hoc dai cuang
ciia sinh vien Trudng Dai Hgc Su Ph^m
Hu6 (xem
http://e.lrc-hueuni.edu.vn/login/index.php) Dd lieu
ciia khda hgc dugc luu dudi dan file CSV
CO cdu triic gdm 12 thugc tinh nhdm mo td
thdng tin cua sinh vien, cdc bai kiSm tra,
so ldn tham gia khoa hoc , cac dong chda
th6ng tin m6 td cac k6t qua hgc tap eua
sinh vi8n dat dugc
Chung tdi tdng hgp cac k£t qua
nghien cuu ve khai pha diJ lieu cua khoa
hgc true tuyen nhung dugc thirc hien tr6n
m6t trudng hgp cu th6 vdi mdt cong cu
khai phd dii lieu la phdn mSm ma ngudn
md Weka Khi thue hien vdi trudng hgp
nghien cuu cu thi, chung tdi muon Iam ro
khd ndng luu trd dQ lieu khoa hgc ciia
Moodle, tien xd ly du Ii6u ra sao va quy
trinh khai pha diJ lieu tren Weka Qua
ddy chiing toi cung mudn chi ra rdng vdi
cac cong cu co san, giao vien co thi thuc
hien mgt so khai pha dd lieu cd thi d muc
dem gidn nhu thfing ke hay true quan hda
cac dii ligu nhdm mang lai cac hi8u qua
cho eae khda hgc true tuyin Ben canh dd,
chung tdi con riit ra dugc mgt s6 y nghia
mdi mg cua khai pha dd lieu tren khoa hgc tryc tuy6n so vdi cdc ket qua da co Tuy vay vdi nhieu Iy do, bai bdo khdng ddt ra muc dich qua nghi6n cdu viee khai phd dir lieu cua khda hge vda noi tren nhdm dua ra cdc khuydn nghi den ngudi thilt ke, ngudi day va sinh vien ciia khda hgc nay
Do khuon kho eua bdi bao, chiing t6i khong thi minh hga tudng minh cdc kit qua thyc hien tren Weka, md chi dua ra cdc ting hgp ket qua nghien cdu dd co cung nhu cac ket qua dugc chdng t6i nhdn xet ra tren trudng hgp nghien cdu cu the, dac biet la cac y nghTa thiet thue ddi vdi vi8c day va hgc tryc tuyen qua viec khai pha dir lieu khoa hgc
Phdn 2 cua bai bao dua ra cac ung dung cua m6t sd ky thuat khai pha du lieu trong h6 qudn Iy khda hge Moodle vdi phdn mSm Weka, nhu tien xd Iy diJ lieu, th6ng ke, phdn cum, phan Idp, luat ket hgp Cae ket ludn dugc dua ra trong phan
3 cua bdi bdo
2 KHAI PHA D f LIEU TRONG HE QUAN LY KHOA H O C MOODLE VOa PHAN M E M W E K A
2.1 Tien xff ly du* lieu Tat ca cae hoat dgng ciia ngudi hgc hay gido vien khi tham gia vdo khda hgc deu duge h6 thdng luu trir lai, dir Ii6u cua
he thdng Moodle thudng bao gdm eac thdng tin sau:
- Tat ca cdc thdng tin cd nhdn ngudi hgc va eda giao vien
- Nhat ky hoat dgng cua ngudi hgc nhu:
Trang 3Ngudi hgc tham gia dgc cac tai lieu
nao;
K6t qud cua qua trinh hgc hay do Id
ket qua diim cua ede mdn hgc cd trong
khda hge ma ngudi hgc da tham gia;
Khung thdi gian ngudi hgc thudng
truy e^p vdo trang web;
Cdc tdi lieu e6 trong khda hge dugc
ngudi hgc dd tham khao;
Cac hdnh ddng va thdi gian md hgc
viSn ddnh cho mdt hoat ddng d trong khoa
hgc;
Trao doi vdi ban hgc thdng qua h6
thdng dien ddn, nhdng ^ kien va cdc edu
hdi danh cho cdc gido vien;
S6 lugng truy cap eac tdi li6u md
giao viSn da dua len khda hoc nhu: bai
giang, gido trinh, video, hinh dnh minh hga, am thanh
Qud trinh lam bdi kilm tra: thdi gian danh cho moi edu tra Idi trong bdi kiem tra d6, sd lugng cdu tra Idi diing vd sai Thdng tin ngudi hgc trao ddi tren dien dan vd cac y kien phan hdi trong khda hgc cua hgc vi8n
Dd lieu trong he qudn Iy khda hgc Moodle dugc luu trir d nhilu bdng, d l thuc hi6n dugc qud trinh khai phd tr6n mgt tap dd lieu, trudc tien cdn phdi tong hgp tren nhieu bang Dl thuc hien khai pha tren khda hgc ndi tren, chiing t6i da tong hgp cdc bang sau:
Bdng 1 Nhdt ky hpc tap cua ngu&i hpc
Thudc tfnh
Khda hgc
Thdi diim
Dia chiIP
Ten ngudi diing
ddy dii
Hanh ddng
Thdng tin
Kiiu dd lieu
Text
Date time
Number
Text
Text
Text
Mdtd T8n cac khda hgc ma sinh vien truy cap vao h8 thdng web
Thdi diem sinh vi8n truy cap khda hgc Dia chi cua may tfnh md sinh vi8n sd dung Ten sinh vien tuy cap vdo khda hge Nhdng vi6c sinh vien thyc hiSn tren khda hgc Thdng tin ve hdnh ddng sinh viSn tham gia khda hgc
Bdng 2 HOMEJTINCD
Thudc tfnh
Tdn
Hg
ED
DCC
KT2
KT3
DTHWORD
Kieu gia trj
Text
Text
Text
Number
Number
Number
Number
Mdtd T8n sinh vi8n
Hg ciia sinh vien
Ma sd sinh vi6n Diem chuySn cdn Diem bai kiem tra 2 Diim bai kiem tra 3 Diem bdi thyc hanh word
Trang 4KTl
KT4
TONGl
T0NG2
Number
Number
Number
Number
Diim bdi kiem tra 1 Diem bai kilm tra 4 Tong diem ciia KT2 va KT3 T6ng diem cua KTl vd KT4
Bdng 3 Sinh viin
Thu6e tinh
TSn sinh vien
T6ng hanh ddng
Kieu dd lieu
Text
Number
Motd j Ten eua sinh vi8n trong khda hgc [
Tong cae hanh ddng cua sinh vi8n dd j Gdp cac bang tren ta duge mdt DataSet su dung 12 thude tinh nhu sau:
Ten thugc tinh
Ten
Hg
ID
Hanh dgng
DCC
KT2
KT3
DTHWORD
KTl
KT4
TONGl
T0NG2
Kieu gid trj thudc tinh
Text
Text
Text
Number
Number
Number
Number
Number
Number
Number
Number
Number
Md ta Ten sinh vien trong kh6a hgc
Hg cua sinh vien
Ma sd sinh vien T6ng sd hanh dgng trong khda hge cua sinh vien do
Diim chuyen cdn Diem bdi kiem tra 2 Diem bdi kiem tra 3 Diem bai thuc hanh word Diem bdi kiem tra 1 Diem bdi kilm tra 4 Tong diim KT2 vd KT3 Tdng diem KTl va KT4
Dd lieu trong Moodle se co nhihig
diJ lieu nhilu (Id du lieu ed gia tri ISch
chudn) vi vdy ehdng ta cdn xu Iy cdc du
lieu do bang edeh chia khoang gid tri Dii
vdi diJ li8u eua khda hgc tr8n c6 m^t s6
thu6c tinh cdn chia khoang nhu: DCC,
HANH DONG, TONG 1, DTHWORD,
DTHEXEL; chiing tdi chia thdnh 3
khodng vdi dinh muc Id: Trung binh, Kha,
T6t Cae thude tinh nhu HO, Ten co thi
Ioai b6 di vi da co ma ID
Trong cdc ki thudt khai pha d& Ii6u
CO m6t s6 kl thudt khai pha chi dgc dugc
mdt sd kiiu file dd li6u, vi vdy chung ta
cdn phdi chuyen ddi kiiu du lieu sao cho phu hgp vdi yeu cdu cua thudt todn h o ^
khung khai thac dd lieu Bk khai phd dd
li?u tren phdn mim Weka, chdng toi chuyin doi chung sang dinh dang Arff, mgt dang file dd li8u chuyen bi^t cua Weka
2.2 lfng dung ki thudt tfa6ng ke
Mde du Moodle khdng cung cip ede
edng cu thSng k8 manh, nhung vdi cdc dir lieu cua khda hgc true tuyin dugc luu trd, ket hgp vdi cdc cdng cu thdng ke dan gidn nhu Excell, chung ta cd thi thu dugc
Trang 5nhieu ket qud thu vi cho cdng tdc giang
day tren khda hgc true tuyen
Trudc hit chung ta cd the biit dugc
sd lugt vd thdi gian truy cap cdc trang cua
khda hgc Td dd riit ra hieu suat v l thdi
gian tham gia khda hgc (bao nhieu gid
trSn trang web, bao nhieu gid cho timg
hoat ddng ) Xem xet sinh vien danh bao
nhi6u thdi gian cho viec hgc tdp va vi6e
vdi nhieu gid tr6n khda hgc nhung cd dem
I?i hieu qua hge tdp cho sinh vi8n hay hg
vdo eac khda hge true tuyin chi Id hinh
thuc ddi phd (trong trudng hgp nghien
cdu cua chung toi, thi khda hgc tryc tuyin
chi cd hinh thuc ket hgp vdi hgc vd danh
gia truyin thdng d tren lap)
Qua dd liSu ndy chdng ta cdn cd the
biit dugc tdi nguydn hgc tdp ndo dugc
truy cdp nhieu
Han nda chung ta cd the thong k8
mdi tuong quan hay phan tich hdi quy dua
tren cdc sd liSu thdng ke cua cdc ddi
tugng, cdc hoat ddng hgc tap de nit ra
eac kit luan v l su dnh hudng gida thdi do
hgc tdp vdi ket qud hgc tdp
Vdi du lieu cua khda hgc true tuyen
ma chung tdi nghien edu, qua thdng ke
chdng tdi nhdn thdy: Trong khda hgc ndy,
sinh vien chii yeu chi ddng nhap vdo he
thdng d l Iam cac bdi kiem tra, cdc tai Ii6u
lien quan den mdn hgc it dirge sinh vien
truy cap vdo, cac video hinh dnh lien quan
din mdn hgc lugng truy cdp Id rat it, sd
Idn ldm cdc bai kilm tra bo sung dai da sd
sinh vien dlu cd thue hien, nhung ket qud
ldm bdi kilm tra khdng cao Thdi gian
sinh vien hoat dgng tren he thdng vdn cdn
ft, sau khi lam xong bdi kiem tra, sinh vien
thudng dang xudt ra khdi he thdng
Do do gido vien edn xdy dyng cdc gia phdp trong thilt k l khda hgc cung nhu ket hgp khi gidng day nhdm giup cho cdc sinh vien tham gia nhieu hoat dgng hgc tap hon nhu dgc tdi lieu, tham gia dien ddn
de trao ddi kinh nghi8m va gidi quyet nhiJng thac mac trong bai hgc, gido vi8n edn dua nhirng tdi lieu mang tinh kieh thich vi6c hoc eho sinh vi8n nhu hinh anh, video Ngoai ra gido vien can khuyen khich sinh vien trao ddi vdi nhau qua dien ddn, tham gia ldm viec nhdm de ket qud hgc tap nang eao hon
Ben canh dd, Moodle cdn co cac du lieu cua ede boat dgng hgc tap cho kilm tra danh gia, dd Id cdc dd li8u dl danh gid cdc cugc kiem tra danh gia dya tren ly thuyet kiem tra ddnh gid gido due cd dien (sfl lugng trd Idi dung/sai, do lech chudn eua di8m, dfl phdn biet, dfl khd cua eac edu hoi) dl tu dd giao vien cd thi ed nhihig bai kilm tra ddnh gia tdt han 2.3 ti'ag dung kt thudt khai phd luat ket hop
Ky thuat khai phd luat ket hgp da dugc dp dung trong day hgc tryc tuyin nhdm dua ra eac tu van khi dua vao khda
hgc cdc hoaA dflng hay tai nguySn hgc t^p,
xem xet tdi nguyen hgc tdp ndo Id phu hgp nhdt d l tu van cho ngudi hgc sd dung, xac dinh ede thude tinh dac trung nham phdn nhflm ngudi hgc, xdc dinh mfli quan he gida cdc md hinh cua cdc hanh vi hgc tdp, nhdn ra cdc Idi cd tinh bac eau eua ngudi hgc, phdt hien ra cac mdi quan he giua eac thdng tin cda ngudi hgc vdi viec dua ra cac phan hdi den ngudi day,
Su dung thudt todn Apriori vdi do ho trg Minsuf Id 0,4 va do tm cay Minconf la 0,9 vdi diJ Ii8u cua khda hge ndi tren, khi
Trang 6thuc hien tren phdn mim Weka, ta thu
dugc mdt khdi lugng ldn cdc luat kit hgp,
trong do ed rdt nhilu cdc luat du thua
nhung eung co nhilu luat eo y nghTa ldn
trong day hgc tryc tuyin Nhdng luat ndy
rdt hihi ich vdi giao vi8n khi dua ra cdc
quylt dinh dfli vdi cae hoat dgng hgc cda
sinh vi8n hay khi sinh vien gap khd khdn
trong hgc tap Chdng han nhu cac ludt ehi
ra rdng niu so cdc boat dgng cua sinh vien
it thi diim kilm da cung thdp Sau khi
phdn tich cdc luat kit hgp thu dugc, chung
toi cfl cdc nhdn xet sau:
- Sinh vien co kit qua cao trong
phdn thi trac nghi8m iy thuyet thi ldm tflt
va c6 diem cao trong bai thue hdnh
- Sinh vien cfl nhieu gid hoat dflng
tren khda hgc nhu dgc tdi Heu co tren he
thdng, trao dfli thflng tin vdi ban be thdng
qua diin dan, hoan thanh cac bai kiem
tra Luc do ket qud hgc tap se dat kit qud
cao
Dua tren cae thdng tin ndi tren,
ngudi day can luu tdm ban vdi cdc sinh
vien cfl nguy ca thi khflng dat cao Gido
vien cdn tao dgng luc ban niia dfli vdi cdc
dfli tugng nay Trong khoa hge gido vien
cdn dua len nhiing tdi lieu phong phii, da
dang lien quan den mfln hgc va cae bai
ki8m tra vua vdi muc do eiia sinh vien, dk
td do sinh vi6n cfl ngudn tdi li8u hge tap
phong phli vd dat kit qud cao
2.4, U'ng dung kl thuat phan cum
KT thuat phan cum dd lieu ciia cae
khda hge E-leaming dd dugc su dung d l
phan cum cac sinh vien cd cdc ddc diim
hgc tdp tuong tu nhau nhdm xdy dung cae
nhdm hgc sinh hgc tdp hgp tac lan nhau,
de gom cum eac sinh vien cfl tiin trinh
hgc gidng nhau khi xay dyng cac khfla hgc dya tren ddi tugng hgc tap, nhdm cung cdp nhiing hudng ddn rieng biSt dira tren ede ky nang va ddc diem rieng ciia timg nhom sinh vien, d l nhdm cdc bai kiem tra va eac cdu hdi thanh eac cum cfl lien quan dya tren cdc dd lieu hgc tdp, nhdm ket qua cac bdi kiem tra c6a sinh vien vdo ede cum cd di8m tuong tu nhau Vdi mue dich phan cum sinh vien cda khoa hgc ndi tren, dua tren cac hoat dflng hgc tdp va diem kilm tra Su dyng phdn mim Weka vdi thudt toan K-mean
va sd cum k^3 Weka se dua ra thflng tin
ve cac cum nhu trgng tam cum (tri trung binh dd lech chudn cda mdi thudc tinh cua dii' lieu dugc phan cum), sfl lugng ciia mdi cum va ti 16 phdn trdm cda cum so vdi tdng thi
O ddy, cum 0 dugc dac trung Id nhiing sinh vien cd ket qua cdc bdi kilm tra thdp va cac hoat dgng hgc tap it, diem thuc hdnh cung thap Cum 1 gdm cdc sinh vien cd ket qud cdc bdi kilm tra tdt, cfl s6 hoat ddng hgc tap tuang ddi eao, diim thyc hdnh cung tucmg ddi tdt Cum 2 Id nhiing sinh vi8n cd ket qua kilm tra ciing nhu sd cdc boat ddng, diim thuc hdnh nam gida sd lieu eda cum 0 va cum I Gido vien ed thi sd dung cac thdng tin nay d8 phan nhdm sinh vi8n dya tren tinh tich cue hay khdng tich cyc hay tuang ddi tich cue cda sinh vien Td cdc cum sinh vien nay gido vi8n sS xdy dyng cae nhdm hgp tac hgc t$p khac nhau bdng each ket hgp cdc sinh vien trong cung mgt cum hay cdc cum khde nhau Ben canh do giao vien sg dua ra cdc each day hgc khde nhau, each dua ra eac bdi tdp vd bdi kiem tra theo cdc mdc do khde d l giiip cho sinh
Trang 7vien hgc tap ngdy edng hieu qud, tao hung
tiiu hge t|.p cho sinh vien
Ngodi ket qud nit ra td vi8c phdn
cum dua tr6n diem ciia sinh vien, khai phd
dd lieu tr6n hi thdng Moodle cdn ed the
phdn cum sinh vien theo miic do truy cdp
he thdng, nhdm sinh vien thudng xuy8n
vdo hS thdng vd nhdm sinh vien it tham
gia vdo he thdng, quan sat trong mdi
nhdm dac diem cua cdc hoat ddng va ket
qua hgc tap nhu the ndo, nham giiip giao
vi6n cfl the dua ra cdc phuang hudng hge
tap khac nhau cho moi sinh vien cua moi
nhdm d l dat ket qud tdt
2 ^ Lfng dijing ki thudt phdn Idp
Trong day hgc tryc tuyin, phuang
phdp phan Idp dd dugc dp dung dt phat
hiSn cac nhdm hgc sinh cd ddc trung
gidng nhau; phdn nhdm hgc sinh vdi cdc
hieu img khi dua ra cac chiSn luge su
pham mdi; dy doan thdnh qud hgc tap cua
hgc sinh; phdn nhdm cae sai ldm thong
thudng cua ngudi hgc
Vdi dd lieu cua khda hgc noi tren,
vdi mue dich Id nhdm md ta dae trung cua
nhdng sinh vien dat hay khdng dat mdn
hgc nay Tren phdn mim Weka ehiing tdi
da sd dung thuat todn J48 dl phan Idp dii
lieu Kit qua cda viec thyc hien thudt todn
cho ra cay quyet dinh va cdc ludt phdn Idp
dugc nit ra td edy quylt dinh Khi phan
Idp sinh vien dua tr8n diim kit thuc mfln
hgc, nhdm cdc sinh vien cd kit qud kilm
tra nhu nhau cd phu thudc vdo cdc hoat
ddng hgc tr8n Moodle md khda hgc da
dua ra Khi thuc hi8n thuat todn phdn Idp
tren Weka se cho ta, edy quylt dinh cung
sd nut nhdnh vd nut la cda cay Ben canh
do Weka cung dua ra cac ludt
IF THEN ELSE tuang dng vdi cay
quylt dinh Dya trSn cac ludt nay chung tfli phdn Idp sinh vi6n tham dy khfla hgc thanh 3 Idp Ldp A ung vdi cae sinh vien cfl diim thyc hanh thdp dugc phan vdo lop
cd diim kilm da tiidp Ldp B dng vdi eac sinh vien cd diim thyc hdnh cao dugc phdn vdo ldp ed diem kiem tra cao vd Idp
C dng vdi eac sinh vien cfl diem thuc hanh trung binh dugc phdn ldp vdo ldp cd diem kiem tra ed thi thap, trung binh hay cao, dieu ndy cdn tuy thude vap di8m chuyen cdn, vdo so cdc hoat ddng md khda hgc dua ra Tuang tu dua tren cdc ludt nay chung ta c6 thi dua ra cdc quyet dinh khi xdy dyng ede boat ddng trong khda hgc
vd xdy dyng cdc ldp sinh vien mdi Chdng han, d l thay ede diim thye hdnh va chuyen can efl quyet dinh nhilu den diem kilm tra Tuy vdy van cd eae hoat dgng hgc tren khda hgc true tuyin ma gido vien nen khuyin khich hay han che cho sinh vien dp dung nhdm ndng cao diSm kilm tra cudi khda B8n canh do gido vien cfl
thi sd dung edy quyet dinh dk xac dinh
kip thdi cac sinh vien co vdn d8 trong hgc tdp, do Id cac sinh vien dugc xep vdo lop khdng dat trong kilm tra
3 K E T LUiiN Tren ddy, chung tdi da tflng hgp cdc kit qud nghien edu vl khai phd dd lieu cua khoa hgc tryc tuyen qua viec thye hien mgt trudng hgp cu the eua mgt khda hge tren Moodle vdi cdng eu Weka Qua ddy, thdy rdng vdi cae cdng cu cd sdn, ngudi gido vien cd the thyc hien mdt sfl khai phd dd lieu cd thi d mdc dan gian nhu thflng ke hay true quan hoa cdc dd H8u nhdm mang lai cdc hieu qua cho ede khfla hgc true tuyen Ben eanh do, ehung ta da dua ra dugc mgt sd y nghTa
Trang 8mdi me cua khai phd dd lieu tren khoa hgc
tryc tuyin so vdi eac kit qua dd cfl Do
nhilu Iy do, chiing tfli khong dat ra muc
dich Id qua nghien cuu viec khai pha dd
lieu cua khoa hgc vda noi tren nhdm dua
ra cdc khuyin nghi din ngudi thilt ke,
ngudi day vd sinh vien cua khfla hgc Tin
hgc dai cuang nhu da ndi d dau bdi bdo
Do cung la huong nghien cuu ti6p theo
cua bai bdo
Han nda, theo chiing toi cac cong cu
khai pha dd lieu cdn co giao dien than
thi8n, true quan han cho ngudi day ciing nhu ngudi thilt k l khfla hgc Ngodi ra, co thi tich hgp cdc cong cu khai phd dd lieu trong moi trudng cua ede he qudn ly khfla hge nhu Moodle Vdi eac cdng cu thi hi?n tri thdc thu dugc sau khai pha du liSu true quan gdn gui Ngudi day cung nhu ngudi hgc sg thdy dugc cae dng dung to loTi cua khai phd dd lieu trong vi8c ndng cao chdt lugng day va hgc tren eac khoa hgc true tuyin./
TAI LIEU THAM KHAO
[1] Anozie, N., Junker, B.W., Predicting end-of-year accountability assessment scores from monthly student records in an online tutoring system In Educational Data
Mining AAAI Workshop, California, USA (pp 1-6), 2006
[2] Arroyo, I., Murray, T., Woolf, B., Beal, C , Inferring unobservable learning ariables from students' help seeking behavior In Intelligent Tutoring systems, Alagoas,
Brazil(pp 782-784), 2004
[3] Castro, F., Vellido, A., Nebot, A., Minguillon, J., Detecting atypical student behaviour on an e-leaming system In Simposio Nacional de Tecnologas de la
Informacin y las Comunicaciones en la Educacion, Granada, Spain(pp 153-160),
2005
[4] Rayo, R Gisbert, M., Salinas, J., Using Data mining and Social Networks to analize the structure and Content of Educative on-line Communities In Intemational
Conference on Multimedia and ICTs in Education, Caceres, Spain (pp.1-1), 2005 [5] Yudelson, M.V., Medvedeva, 0., Legowski, E., Castine, M., Jukic, D., Rebecca C ,
Mining Student Learning Data to Develop High Level Pedagogic Strategy in a Medical ITS In Proceedings of AAAI Workshop on Educational Data Mining,
Boston, (pp 1-8), 2006
Trang 9DATA MINING IN ONLINE COURSE MANAGEMENT SYSTEM MOODLE - A
CASE STUDY
Tran Tan Tu', Nguyen The Dung^
ABSTRACT
The purpose of the paper is to synthesize the results of research on data mining of online courses, we carry on a case study of a online course on Moodle with a data mining tool is open source Weka software Besides that, we also offer a some of new senses of data mining on online courses compared with the results already
KejTVord: Moodle, data mining, statistics, association rule, clustering,
classification
^Khoa Cdng nghe Thdng tin, Trudng Dai hgc Pham Van Ddng, email: tttu@pdu.edu.vn
^Khoa Tin hgc, Tmdng Dai hgc Su pham Hul, email: zungnguyen2003@yahoo.com