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About Me
Jumat, 23 Oktober 2009
Selasa, 08 September 2009
Kamis, 03 September 2009
Kamis, 23 Juli 2009
SISTEM INFORMASI
PENGERTIAN
Sistem informai adalah sekumulan hardware, software, brainware, prosedur atau aturan yang diorganisasikan secara integral untuk mengolah data menjadi informasi yang bermanfaat guna memecahkan dan pengambilan keputusan.
Komponen Sistem Informasi
Perangkat Keras (Hardware)
Perangkat lunak (Software) atau program
Prosedur
Orang
Basis Data (Database)
Jaringan komputer dan komunikasi data
Siklus hidup pengembangan Sistem Infrmasi
SLDC
Software Development Life Cycle
Adalah suatu proses pembuatan software yang meliputi :
Scoping – Requirement Collection & Analysis – Prototyping – Designing – Coding – Testing – Implementing – Maintaining.
3 Macam Arsitektur
Macam - macam arsitektur
Arsitektur Tersentralisasi
Dikenal semenjak tahun 1960
Mainframe sebagai aktor utama
Pemrosesan data yang terpusat (komputasi terpusat)
Arsitektur Desentralisasi
Pemrosesan data tersebar (terdistribusi) atau disebut komputasi tersebar
Terdiri atas sejumlah komputer yang tersebar pada berbagai lokasi
Dihubungkan dengan sarana telekomunikasi
Masing-masing komputer mampu melakukan pemrosesan yang serupa secara mandiri
Bisa saling berinteraksi dalam pertukaran data
membagi sistem pemrosesan data terpusat ke dalam subsistem-subsistem yang lebih kecil yang pada hakikatnya masing-masing subsistem tetap berlaku sebagai sistem pemrosesan data yang terpusat
Arsitektur Client/Server
Interoperabilitas
Client, sembarang sistem atau proses yang melakukan suatu permintaan data atau layanan ke server
Server, sistem atau proses yang menyediakan data atau layanan yang diminta oleh client
Sistem informasi dapat dibangun dengan menggunakan perangkat lunak gado-gado
Aplikasi pesan, misalnya surat elektronis (email)
Penyebaran basis data pada beberapa jaringan komputer
Memungkinkan berbagi berkas atau periferal atau pengaksesan komputer melalui jarak jauh
Pemrosesan aplikasi yang intensif dengan suatu pekerjaan (job) dibagi menjadi tugas-tugas (task) yang masing-masing dilaksanakan pada komputer yang berbeda
#
Arsitektur terdistribusi
Pemrosesan data tersebar (terdistribusi) atau disebut komputasi tersebar.Terdiri atas sejumlah komputer yang tersebar pada berbagai lokasi.Dihubungkan dengan sarana telekomunikasi.Masing-masing komputer mampu melakukan pemrosesan yang serupa secara mandiri.Bisa saling berinteraksi dalam pertukaran data.
membagi sistem pemrosesan data terpusat ke dalam subsistem-subsistem yang lebih kecil yang pada hakikatnya masing-masing subsistem tetap berlaku sebagai sistem pemrosesan data yang terpusat
Rabu, 13 Mei 2009
Script Calculator
Berikut ini adalah script:
<html>
<head><title>JS - Calculator</title>
<script language="Javascript"><!--/* Variablen definieren */var plussign = ' + ';var minussign = ' - ';var multiplysign = ' * ';var dividesign = ' / ';var decimalsign = ' . ';var negativesign = ' -';var leftbracket = ' (';var rightbracket = ') ';var rad = 3.141592654 / 180;var base_10 = Math.LN10;var base_2 = Math.LN10;
function calculate(arg) { arg.expr.value = eval(arg.expr.value)}
function enter(arg, string) { arg.expr.value += string}
function clear_display(arg) { arg.expr.value = ' '}
function calc_sqrt(form) { form.expr.value = (Math.sqrt(form.expr.value))}
function calc_sqr(form) { form.expr.value = ((form.expr.value * 1) * (form.expr.value * 1))}
function sin_form(form) { form.expr.value = (Math.sin (form.expr.value * rad))}
function cos_form(form) { form.expr.value = (Math.cos (form.expr.value * rad))}
function tan_form(form) { form.expr.value = (Math.tan(form.expr.value * rad))}
function inverse(form) { form.expr.value = ( 1 / (form.expr.value))}
function base10_log(form) { form.expr.value = (Math.log(form.expr.value) / base_10)}
function base2_log(form) { form.expr.value = (Math.log(form.expr.value) / base_2)}//--></script>
</head>
<body><p align="center"><big><big>JavaScript - Calculator SMANEKA</big></big></p><form>
<table align="center" border="0" width="100" bgcolor="#CCCCCC" > <tr> <td width="100%" colspan="5"><input type="text" name="expr" size="35" action="calculate(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" sin " Onclick="sin_form(this.form)"></td> <td width="20%"><input type="button" value=" cos " OnClick="cos_form(this.form)"></td> <td width="20%"><input type="button" value=" tan " Onclick="tan_form(this.form)"></td> <td width="20%"><input type="button" value="log10e" onClick="base10_log(this.form)"></td> <td width="20%"><input type="button" value=" log2e " OnClick="base2_log(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" Sqrt " Onclick="calc_sqrt(this.form)"></td> <td width="20%"><input type="button" value=" Sqr " OnClick="calc_sqr(this.form)"></td> <td width="20%"><input type="button" value=" ( " OnClick="enter(this.form,leftbracket)"></td> <td width="20%"><input type="button" value=" ) " OnClick="enter(this.form,rightbracket)"></td> <td width="20%"><input type="button" value=" 1 / X " OnClick="inverse(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 7 " onClick="enter(this.form, 7)"></td> <td width="20%"><input type="button" value=" 8 " onClick="enter(this.form, 8)"></td> <td width="20%"><input type="button" value=" 9 " onClick="enter(this.form, 9)"></td> <td width="40%" colspan="2"><input type="button" value=" C " onClick="clear_display(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 4 " onClick="enter(this.form, 4)"></td> <td width="20%"><input type="button" value=" 5 " onClick="enter(this.form, 5)"></td> <td width="20%"><input type="button" value=" 6 " onClick="enter(this.form, 6)"></td> <td width="20%"><input type="button" value=" * " onClick="enter(this.form,multiplysign)"> </td> <td width="20%"> <input type="button" value=" / " onClick="enter(this.form,dividesign)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 1 " onclick="enter(this.form, 1)"></td> <td width="20%"><input type="button" value=" 2 " onclick="enter(this.form, 2)"></td> <td width="20%"><input type="button" value=" 3 " onclick="enter(this.form, 3)"></td> <td width="20%"><input type="button" value=" + " onClick="enter(this.form,plussign)"> </td> <td width="20%"> <input type="button" value=" - " onClick="enter(this.form,minussign)"> </td> </tr> <tr> <td width="20%"><input type="button" value=" 0 " onClick="enter(this.form, 0)"></td> <td width="20%"><input type="button" value=" . " onClick="enter(this.form,decimalsign)"></td> <td width="20%"><input type="button" value=" neg " onClick="enter(this.form,negativesign)"></td> <td width="40%" colspan="2"><input type="button" value=" = " onClick="calculate(this.form)"></td> </tr></table>
</form></body>
</html>
<head><title>JS - Calculator</title>
<script language="Javascript"><!--/* Variablen definieren */var plussign = ' + ';var minussign = ' - ';var multiplysign = ' * ';var dividesign = ' / ';var decimalsign = ' . ';var negativesign = ' -';var leftbracket = ' (';var rightbracket = ') ';var rad = 3.141592654 / 180;var base_10 = Math.LN10;var base_2 = Math.LN10;
function calculate(arg) { arg.expr.value = eval(arg.expr.value)}
function enter(arg, string) { arg.expr.value += string}
function clear_display(arg) { arg.expr.value = ' '}
function calc_sqrt(form) { form.expr.value = (Math.sqrt(form.expr.value))}
function calc_sqr(form) { form.expr.value = ((form.expr.value * 1) * (form.expr.value * 1))}
function sin_form(form) { form.expr.value = (Math.sin (form.expr.value * rad))}
function cos_form(form) { form.expr.value = (Math.cos (form.expr.value * rad))}
function tan_form(form) { form.expr.value = (Math.tan(form.expr.value * rad))}
function inverse(form) { form.expr.value = ( 1 / (form.expr.value))}
function base10_log(form) { form.expr.value = (Math.log(form.expr.value) / base_10)}
function base2_log(form) { form.expr.value = (Math.log(form.expr.value) / base_2)}//--></script>
</head>
<body><p align="center"><big><big>JavaScript - Calculator SMANEKA</big></big></p><form>
<table align="center" border="0" width="100" bgcolor="#CCCCCC" > <tr> <td width="100%" colspan="5"><input type="text" name="expr" size="35" action="calculate(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" sin " Onclick="sin_form(this.form)"></td> <td width="20%"><input type="button" value=" cos " OnClick="cos_form(this.form)"></td> <td width="20%"><input type="button" value=" tan " Onclick="tan_form(this.form)"></td> <td width="20%"><input type="button" value="log10e" onClick="base10_log(this.form)"></td> <td width="20%"><input type="button" value=" log2e " OnClick="base2_log(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" Sqrt " Onclick="calc_sqrt(this.form)"></td> <td width="20%"><input type="button" value=" Sqr " OnClick="calc_sqr(this.form)"></td> <td width="20%"><input type="button" value=" ( " OnClick="enter(this.form,leftbracket)"></td> <td width="20%"><input type="button" value=" ) " OnClick="enter(this.form,rightbracket)"></td> <td width="20%"><input type="button" value=" 1 / X " OnClick="inverse(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 7 " onClick="enter(this.form, 7)"></td> <td width="20%"><input type="button" value=" 8 " onClick="enter(this.form, 8)"></td> <td width="20%"><input type="button" value=" 9 " onClick="enter(this.form, 9)"></td> <td width="40%" colspan="2"><input type="button" value=" C " onClick="clear_display(this.form)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 4 " onClick="enter(this.form, 4)"></td> <td width="20%"><input type="button" value=" 5 " onClick="enter(this.form, 5)"></td> <td width="20%"><input type="button" value=" 6 " onClick="enter(this.form, 6)"></td> <td width="20%"><input type="button" value=" * " onClick="enter(this.form,multiplysign)"> </td> <td width="20%"> <input type="button" value=" / " onClick="enter(this.form,dividesign)"></td> </tr> <tr> <td width="20%"><input type="button" value=" 1 " onclick="enter(this.form, 1)"></td> <td width="20%"><input type="button" value=" 2 " onclick="enter(this.form, 2)"></td> <td width="20%"><input type="button" value=" 3 " onclick="enter(this.form, 3)"></td> <td width="20%"><input type="button" value=" + " onClick="enter(this.form,plussign)"> </td> <td width="20%"> <input type="button" value=" - " onClick="enter(this.form,minussign)"> </td> </tr> <tr> <td width="20%"><input type="button" value=" 0 " onClick="enter(this.form, 0)"></td> <td width="20%"><input type="button" value=" . " onClick="enter(this.form,decimalsign)"></td> <td width="20%"><input type="button" value=" neg " onClick="enter(this.form,negativesign)"></td> <td width="40%" colspan="2"><input type="button" value=" = " onClick="calculate(this.form)"></td> </tr></table>
</form></body>
</html>
untuk program di bawah ini:
Langganan:
Postingan (Atom)