Dokumen tersebut membahas tentang bahasa kueri relasional yang memungkinkan manipulasi dan penampilan data berdasarkan model relasional. Bahasa kueri relasional terbagi menjadi aljabar relasional dan kalkulus relasional, dimana aljabar relasional lebih fokus pada implementasi secara praktis sedangkan kalkulus relasional bersifat deklaratif tanpa menjelaskan cara pelaksanaannya. Operasi dasar aljabar relasional meliputi seleksi
Desktop, Embedded and Mobile Apps with Vortex CaféAngelo Corsaro
In the past few years we have been experiencing an amazing proliferation of mobile and embedded platforms. Contemporary developers are increasingly faced with the challenge of writing applications that can run on desktop, mobile (e.g. Android), and on low-cost embedded platforms (e.g. Raspberry-Pi and Beaglebone). This is causing a rejuvenated interest in the Java platform as the mean to achieve the holy grail of write-once and run-everywhere. With the availability of Java environments supporting almost any kind of device in several different form factors, the missing element to the picture is an effective way of enabling communication between them.
Vortex Café is a pure Java implementation of the OMG Data Distribution Service (DDS) that enables seamless, efficient and timely data sharing across many-core machines, mobile and embedded devices.
This presentation will (1) introduce the main abstractions provided by Vortex Café, (2) provide an overview of its architecture and explain how it exploits Staged Event Driven Architectures to optimize its runtime depending of the target hardware, (3) provide an overview of the typical performance delivered by Vortex Café, and (3) get you started developing distributed Java and Scala applications with Vortex Café.
Desktop, Embedded and Mobile Apps with Vortex CaféAngelo Corsaro
In the past few years we have been experiencing an amazing proliferation of mobile and embedded platforms. Contemporary developers are increasingly faced with the challenge of writing applications that can run on desktop, mobile (e.g. Android), and on low-cost embedded platforms (e.g. Raspberry-Pi and Beaglebone). This is causing a rejuvenated interest in the Java platform as the mean to achieve the holy grail of write-once and run-everywhere. With the availability of Java environments supporting almost any kind of device in several different form factors, the missing element to the picture is an effective way of enabling communication between them.
Vortex Café is a pure Java implementation of the OMG Data Distribution Service (DDS) that enables seamless, efficient and timely data sharing across many-core machines, mobile and embedded devices.
This presentation will (1) introduce the main abstractions provided by Vortex Café, (2) provide an overview of its architecture and explain how it exploits Staged Event Driven Architectures to optimize its runtime depending of the target hardware, (3) provide an overview of the typical performance delivered by Vortex Café, and (3) get you started developing distributed Java and Scala applications with Vortex Café.
This presentation explains first the vision behind the release as Open Source of OpenSplice DDS. Then it highlights the new product structure and licensing model.
This presentation covers the key facts you need to know about the current and upcoming PCI compliance requirements.
Key take-aways:
*What are the new PCI Compliance changes (current and planned)
*When the changes go into effect & how they impact your business
*How to automate the PCI Compliance processes
Edited and coordinated by Adam Franklin, General Counsel of Colorado PERA and Catherine LaMarr, General Counsel of the office of the State Treasurer of Connecticut, this Working Paper on the analyzes the landscape of securities litigation post the U.S. Supreme Courts decision in Morrison v. National Bank of Australia Ltd. (2010). Due to Morrison, investors no longer have the protection of the U.S. securities laws if the securities were purchased on a foreign exchange. Reed Kathrein was a contributing member and primarily drafted the chapters on the state of securities litigation in Australia, Germany and South Korea. The project was commissioned by Greg Smith, then General Counsel of ColoradoPERA, as President of the National Association of Public Pension Attorneys ("NAPPA").
first of 2 sessions focusing on including and teaching struggling readers in the class with choice, open-ended strategies, and a focus on background knowledge.
This presentation explains first the vision behind the release as Open Source of OpenSplice DDS. Then it highlights the new product structure and licensing model.
This presentation covers the key facts you need to know about the current and upcoming PCI compliance requirements.
Key take-aways:
*What are the new PCI Compliance changes (current and planned)
*When the changes go into effect & how they impact your business
*How to automate the PCI Compliance processes
Edited and coordinated by Adam Franklin, General Counsel of Colorado PERA and Catherine LaMarr, General Counsel of the office of the State Treasurer of Connecticut, this Working Paper on the analyzes the landscape of securities litigation post the U.S. Supreme Courts decision in Morrison v. National Bank of Australia Ltd. (2010). Due to Morrison, investors no longer have the protection of the U.S. securities laws if the securities were purchased on a foreign exchange. Reed Kathrein was a contributing member and primarily drafted the chapters on the state of securities litigation in Australia, Germany and South Korea. The project was commissioned by Greg Smith, then General Counsel of ColoradoPERA, as President of the National Association of Public Pension Attorneys ("NAPPA").
first of 2 sessions focusing on including and teaching struggling readers in the class with choice, open-ended strategies, and a focus on background knowledge.
Teori Fungsionalisme Kulturalisasi Talcott Parsons (Dosen Pengampu : Khoirin ...nasrudienaulia
Dalam teori fungsionalisme kulturalisasi Talcott Parsons, konsep struktur sosial sangat erat hubungannya dengan kulturalisasi. Struktur sosial merujuk pada pola-pola hubungan sosial yang terorganisir dalam masyarakat, termasuk hierarki, peran, dan institusi yang mengatur interaksi antara individu. Hubungan antara konsep struktur sosial dan kulturalisasi dapat dijelaskan sebagai berikut:
1. Pola Interaksi Sosial: Struktur sosial menentukan pola interaksi sosial antara individu dalam masyarakat. Pola-pola ini dipengaruhi oleh norma-norma budaya yang diinternalisasi oleh anggota masyarakat melalui proses sosialisasi. Dengan demikian, struktur sosial dan kulturalisasi saling memengaruhi dalam membentuk cara individu berinteraksi dan berperilaku.
2. Distribusi Kekuasaan dan Otoritas: Struktur sosial menentukan distribusi kekuasaan dan otoritas dalam masyarakat. Nilai-nilai budaya yang dianut oleh masyarakat juga memengaruhi bagaimana kekuasaan dan otoritas didistribusikan dalam struktur sosial. Kulturalisasi memainkan peran dalam melegitimasi sistem kekuasaan yang ada melalui nilai-nilai yang dianut oleh masyarakat.
3. Fungsi Sosial: Struktur sosial dan kulturalisasi saling terkait dalam menjalankan fungsi-fungsi sosial dalam masyarakat. Nilai-nilai budaya dan norma-norma yang terinternalisasi membentuk dasar bagi pelaksanaan fungsi-fungsi sosial yang diperlukan untuk menjaga keseimbangan dan stabilitas dalam masyarakat.
Dengan demikian, konsep struktur sosial dalam teori fungsionalisme kulturalisasi Parsons tidak dapat dipisahkan dari kulturalisasi karena keduanya saling berinteraksi dan saling memengaruhi dalam membentuk pola-pola hubungan sosial, distribusi kekuasaan, dan pelaksanaan fungsi-fungsi sosial dalam masyarakat.
2. Bahasa Kueri Relasional
Bahasa Kueri
Memungkinkan memanipulasi dan menampilkan data
Model Relasional mendukung bahasa Kueri yang
sederhana dan ampuh
Berdasarkan landasan teori Logika dan Himpunan
Memungkinkan optimasi pada level implementasi
Bahasa Kueri bukanlah bahasa pemrograman
Tidak dirancang untuk melakukan komputasi kompleks
Mendukung akses yang mudah dan efisien untuk
menampilkan data
Aljabar Relasional 2
3. Bahasa Kueri Relasional
Secara formal terbagi dua
Aljabar Relasional
Lebih ke tataran praktis dan implementasi
Memungkinkan perencanaan eksekusi yang efisien
Kalkulus Relasional
Menjelaskan apa yang diinginkan
Tidak menjelaskan bagaimana cara yang digunakan untuk
mendapatkan hasil komputasi
Deklaratif
Aljabar Relasional 3
4. R1 Sid Bid Day
22 101 10/10/96
Contoh Tabel Relasi 58 103 11/12/96
Model data sebuah S1 Sid Name Rating Age
perusahaan pelayaran 22 Dustin 7 45.0
Sailors, menyimpan 31 Lubber 8 55.5
data para nakhoda kapal 58 Rusty 10 35.0
Reserves, menyimpan
data nakhoda yang S2 Sid Name Rating Age
mengemudikan kapal 28 Yuppy 9 35.0
31 Lubber 8 55.5
44 Guppy 5 35.0
58 Rusty 10 35.0
Aljabar Relasional 4
5. Relasi dan Instance
Bahasa Kueri diterapkan terhadap instance basis data
Masukan (input) kueri adalah instance relasi
Setiap operator kueri menghasilkan luaran (output)
instance relasi
Bahasa Kueri tidak mengubah schema relasi
Aljabar Relasional 5
6. Operasi Dasar Aljabar
Relasional
Selection (σ) Mengambil subset baris dari sebuah
relasi
Projection (π) Mengambil subset kolom dari sebuah
relasi
Cross-product (×) Mengombinasikan dua relasi
Set-difference (–) Mengambil tuple di relasi pertama
yang tidak ada di relasi kedua
Union (∪) Menggabungkan tuple di kedua relasi
Aljabar Relasional 6
7. Aljabar Relasional
Bersifat tertutup
Masukan bagi Operasi dasar adalah relasi
Hasil dari Operasi dasar adalah relasi
Operasi dasar bisa diterapkan secara berulang / nested
Aljabar Relasional 7
8. Name Rating
Yuppy 9
Lubber 8
Operasi Projection π Guppy 5
Rusty 10
π name, rating (S2)
Operasi Projection seharusnya menghilangkan
duplikasi pada hasil kueri
Konsep himpunan
Implementasi DBMS tidak menghilangkan duplikasi
kecuali dinyatakan secara eksplisit
π age (S2) Age
35.0
55.0
Aljabar Relasional 8
9. Operasi Selection σ
Menampilkan baris yang memenuhi kondisi seleksi
σ rating > 8 (S2) Sid Name Rating Age
Komposisi operator 28 Yuppy 9 35.0
58 Rusty 10 35.0
π name, rating (σ rating > 8 (S2))
Name Rating
Yuppy 9
Rusty 10
Aljabar Relasional 9
10. Union, Intersection, Set-
difference
Membutuhkan dua relasi sebagai operand
Harus union-compatible
Jumlah kolomnya sama
Tipe data dalam kolom yang berpadanan harus sama
S1 ∩ S2 Sid Name Rating Age
S1 – S2 31 Lubber 8 55.5
58 Rusty 10 35.0
Sid Name Rating Age
22 Dustin 7 45.0
Aljabar Relasional 10
12. Operasi Cross-product
Setiap baris di relasi pertama dipasangkan dengan
setiap baris di relasi kedua
Jika ada kolom dengan nama yang sama dari kedua
relasi, gunakan operator renaming
ρ (C(1 sid1, 5 sid2), S1 × R1)
Kolom pada posisi ke-1 di-rename menjadi sid1
Kolom pada posisi ke-5 di-rename menjadi sid2
Aljabar Relasional 12
14. Join
Conditional join R ×cond S = σcond (R × S)
Untuk sembarang relasi R dan S,
lakukan operasi Cross-product,
lakukan operasi Selection yang memenuhi kriteria cond
Disebut juga Theta-join
Schema relasi yang dihasilkan sama dengan schema
relasi hasil operasi Cross-product
Menghasilkan jumlah tuple yang lebih sedikit
Aljabar Relasional 14
16. Contoh
Tampilkan nama para Sailors yang me-reserve kapal
nomor 103
Alternatif 1
π name ((σ bid=103 R1) × S1)
Alternatif 2
ρ(temp1, ς bid=103 R1)
ρ(temp2, temp1 × S1)
π name (temp2)
Alternatif 3
π name (σ bid=103 (R1 × S1))
Aljabar Relasional 16