Hans Jensen
Corporate Officer/Principal bei Material Research & Design, Inc.
Aktive Beziehungen
Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
---|---|---|---|---|
Kent Buesking | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 28 Jahre |
Brian Sullivan | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 28 Jahre |
Craig Iwano | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 21 Jahre |
Steven Reed | M | 73 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 31 Jahre |
Stephen D. Nimer | M | 70 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 31 Jahre |
Geoffrey William Coates | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 27 Jahre |
Kerry Dunfey Hopp | F | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 24 Jahre |
Joseph Pluscauskis | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | - |
Tiffany Boarts | F | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 20 Jahre |
Maisie Henry | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | - |
Shannon Casey | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | - |
Benjamin Campanella | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 21 Jahre |
Derek Caputo | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 22 Jahre |
Daniel Howren | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 16 Jahre |
Michael Dion | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 19 Jahre |
Gary Tiscia | M | - |
Material Research & Design, Inc.
Material Research & Design, Inc. Aerospace & DefenseElectronic Technology Material Research & Design, Inc. provides research, analysis and design services to the advanced materials community. It serves especially in the areas of composite materials for the aerospace industry. The company was founded by Brian Sullivan and Kent Buesking in February 1996 and is headquartered in Wayne, PA. | 16 Jahre |
Beziehungs-Chart
Beziehungen zu mehreren Unternehmen
Ehemalige Beziehungen
Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
---|---|---|---|---|
Amir Memon | M | - |
University of Pennsylvania
| 11 Jahre |
John N. Carr | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 10 Jahre |
Uri Lopatin | M | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
David Peck | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Marshall Stocker | M | 50 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 6 Jahre |
Nehal Kamalapat Chopra | F | - |
University of Pennsylvania
| 4 Jahre |
Chay-Kee Tan | M | 55 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Henry R. Timmons | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 6 Jahre |
Hiromichi Shibata | M | 69 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Kevin Haley | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Arif Patrick Rachmat | M | 49 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Danai E. Brooks | M | 47 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Stephen Daniel Hutchison | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Patricia Johnson | F | 68 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | - |
Richard D. Whitaker | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Samir Shantilal Somaiya | M | 56 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 2 Jahre |
Manish Kothari | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Bryan Yoon | M | 46 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Manoj Notani | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Carey Goldberg | F | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 7 Jahre |
Ross Saario | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Jay Kumar | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Chen Mao | M | 61 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Tom Chi | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Neil Halloran | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY.
University of Pennsylvania
| 5 Jahre |
Jin-Wook Beom | M | 60 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Jenny Lee | F | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Russell Gimelstob | M | 44 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Robert Hoy | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 6 Jahre |
Steven M. Kurtz | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Theresa Wise | M | 57 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Ashutosh Agrawal | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Puja Dhanraj | F | - |
University of Pennsylvania
| 5 Jahre |
Jason Tagler | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Jung-Hyun Oh | M | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Stuart A. Weiss | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY.
University of Pennsylvania
| 7 Jahre |
Kenneth Lee | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 13 Jahre |
Haftan Eckholdt | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 7 Jahre |
Taran Sang Yong Bae | M | - |
University of Pennsylvania
| 2 Jahre |
M. Kallmeyer | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 2 Jahre |
Nathaniel L. Yap | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY.
University of Pennsylvania
| 7 Jahre |
Matt Shulkin | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY.
University of Pennsylvania
| 7 Jahre |
Robert Anthony Catarella | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
John A. Faucher | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 6 Jahre |
Vitor Cepelowicz | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Sandy Khaund | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY.
University of Pennsylvania
| 9 Jahre |
Gloria Fu | F | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 5 Jahre |
Jennifer McNealey | F | 50 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 6 Jahre |
Paul Hummel | M | 57 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 7 Jahre |
Christopher Patusky | M | 60 |
University of Pennsylvania
| 7 Jahre |
Peter Charles Friedland | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
John R. Gamero | M | - |
University of Pennsylvania
| 4 Jahre |
Manny Yanez | M | - |
University of Pennsylvania
| 3 Jahre |
Neal Kamal Shah | M | - |
University of Pennsylvania
| 2 Jahre |
Jeffrey Paul Hodges | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Olivia Mitchell | F | 71 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 15 Jahre |
Sandy Miller | F | - |
University of Pennsylvania
| 2 Jahre |
Lori Bilker | F | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Michael Levenberg | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Jay Liebowitz | M | - |
University of Pennsylvania
| 3 Jahre |
Jason M. Quinn | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Brian Distelburger | M | 45 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Matthew Ian Rand | M | - |
University of Pennsylvania
| 4 Jahre |
Christopher J. Bellavia | M | 55 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 3 Jahre |
Hiroshi Yamanouchi | M | 62 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 2 Jahre |
John Macmahon | M | - |
University of Pennsylvania
| 2 Jahre |
Jeremy Schein | M | 44 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Daniel James Burr | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Andrew Russell | M | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Yan Chen | M | 56 |
University of Pennsylvania
| 3 Jahre |
Ajay Tandon | M | 47 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Mark Joseph Vasquez | M | 46 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Ann Repke Keane | F | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Andre Bernard Sequin | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Chris M. Larsen | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Alistair James Meadows | M | - |
University of Pennsylvania
| 4 Jahre |
David I. Feygenson | M | - |
University of Pennsylvania
| 2 Jahre |
Ramesh C. Donthamsetty | M | - |
University of Pennsylvania
| 4 Jahre |
John Toufanian | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Bruce Morgan | M | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Robert Corwin | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Igor Syry | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 2 Jahre |
Rajan Naik | M | 52 |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 4 Jahre |
Koji Sasayama | M | - |
Cornell University
Cornell University Other Consumer ServicesConsumer Services Cornell University is an educational institution that offers undergraduate and post graduate programs. It was founded in 1865 and is based in Ithaca, NY. | 2 Jahre |
Statistik
Land | Beziehungen | % des Gesamten |
---|---|---|
Vereinigte Staaten | 100 | 100,00% |
Alter der Beziehungen
Aktive
Vergangene
Herr
Frau
Aufsichtsräte
Führungskräfte
Ursprung der Beziehungen
- Börse
- Insiders
- Hans Jensen
- Persönliches Netzwerk