• Wyszukiwanie zaawansowane
  • Kategorie
  • Kategorie BISAC
  • Książki na zamówienie
  • Promocje
  • Granty
  • Książka na prezent
  • Opinie
  • Pomoc
  • Załóż konto
  • Zaloguj się

 » książki  » Business & Economics - Information Management

zaloguj się | załóż konto
Logo Krainaksiazek.pl

koszyk

konto

szukaj
topmenu
Księgarnia internetowa
Szukaj
Książki na zamówienie
Promocje
Granty
Książka na prezent
Moje konto
Pomoc
 
 
Wyszukiwanie zaawansowane
Pusty koszyk
Bezpłatna dostawa dla zamówień powyżej 20 złBezpłatna dostawa dla zamówień powyżej 20 zł

Kategorie główne

• Nauka
 [2946350]
• Literatura piękna
 [1816154]

  więcej...
• Turystyka
 [70666]
• Informatyka
 [151172]
• Komiksy
 [35576]
• Encyklopedie
 [23172]
• Dziecięca
 [611458]
• Hobby
 [135995]
• AudioBooki
 [1726]
• Literatura faktu
 [225763]
• Muzyka CD
 [378]
• Słowniki
 [2917]
• Inne
 [444280]
• Kalendarze
 [1179]
• Podręczniki
 [166508]
• Poradniki
 [469467]
• Religia
 [507199]
• Czasopisma
 [496]
• Sport
 [61352]
• Sztuka
 [242330]
• CD, DVD, Video
 [3348]
• Technologie
 [219391]
• Zdrowie
 [98638]
• Książkowe Klimaty
 [124]
• Zabawki
 [2382]
• Puzzle, gry
 [3525]
• Literatura w języku ukraińskim
 [259]
• Art. papiernicze i szkolne
 [7107]
Kategorie szczegółowe BISAC

Kategoria BISAC: Business & Economics >> Information Management

ilość książek w kategorii: 7688

Wyświetl książki:
Dostępne języki:
Cena:
od:
do:
ilość na stronie:


 Learning Without Boundaries: Technology to Support Distance/Distributed Learning Seidel, Robert J. 9781489912015 Springer
Learning Without Boundaries: Technology to Support Distance/Distributed Learning

ISBN: 9781489912015 / Angielski / Miękka / 199 str.

ISBN: 9781489912015/Angielski/Miękka/199 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Robert J. Seidel;Paul R. Chatelier
This collection of papers is the result of a workshop sponsored by NATO's Defense Research Group Panel 8 during the Fall of 1993. The workshop was held at the University of German Armed Forces at Neubiberg (Munich) Germany 29 September-l October, 1993. Robert J. Seidel Paul R. Chatelier U.S. Army Research Institute for the Executive Office of the President Behavioral and Social Sciences Office of Science and Technology Policy Washington, D.C. Washington, D.C. v PREFACE We would like to thank the authors of the papers for providing an excellent coverage of this rapidly developing technology,...
This collection of papers is the result of a workshop sponsored by NATO's Defense Research Group Panel 8 during the Fall of 1993. The workshop was hel...
cena: 603,81

 Newsletters als Marketinginstrumente Bernd Staudte 9783640157846 Grin Verlag
Newsletters als Marketinginstrumente

ISBN: 9783640157846 / Niemiecki / Miękka / 80 str.

ISBN: 9783640157846/Niemiecki/Miękka/80 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Bernd Staudte
cena: 173,59

 Untersuchungen zur Einführung eines CMS an der HTWM: Typo3, Joomla und Contenido im Vergleich Bertelmann, Sven 9783656208990 Grin Verlag
Untersuchungen zur Einführung eines CMS an der HTWM: Typo3, Joomla und Contenido im Vergleich

ISBN: 9783656208990 / Niemiecki / Miękka / 90 str.

ISBN: 9783656208990/Niemiecki/Miękka/90 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Sven Bertelmann
Masterarbeit aus dem Jahr 2008 im Fachbereich Informationswissenschaften, Informationsmanagement, Note: 1,0, Hochschule Mittweida (FH) (Fachgruppe Kommunikationstechnik), Veranstaltung: Studiengang Industrial Management, 49 Quellen im Literaturverzeichnis, Sprache: Deutsch, Abstract: In der vorliegenden Arbeit wird untersucht unter welchen Bedingungen die Migration zu einem CMS an der Hochschule Mittweida sinnvoll ist. Dabei werden zuerst die konkreten Anforderungen an ein einzusetzendes CMS erortert. Damit eine objektive Entscheidung gefallt werden kann, werden die so entstehenden...
Masterarbeit aus dem Jahr 2008 im Fachbereich Informationswissenschaften, Informationsmanagement, Note: 1,0, Hochschule Mittweida (FH) (Fachgruppe Kom...
cena: 262,59

 Frühaufklärungssystem Für Immobilienportfolios: Integrativer Ansatz Für Marktgängige Mietobjekte Späth, Rupert 9783658042479 Springer
Frühaufklärungssystem Für Immobilienportfolios: Integrativer Ansatz Für Marktgängige Mietobjekte

ISBN: 9783658042479 / Niemiecki / Miękka / 310 str.

ISBN: 9783658042479/Niemiecki/Miękka/310 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Rupert Spath
Das Risikocontrolling in der Immobilienbranche hat in den letzten Jahren deutlich an Wichtigkeit gewonnen. Eine Herausforderung ist es, Markttrends fruhzeitig zu erkennen und ihre Auswirkungen auf ein Immobilienportfolio adaquat abzuschatzen. Rupert Spath setzt mittels eines selbstentwickelten Crawlers Daten von zu managenden Objekten ins Verhaltnis zu Angeboten aus Immobilienportalen. Auerdem erweitert er die Controllingbasis durch die Ubertragung von Daten von Bestandsobjekten und durch Berucksichtigung der Prognose des Mieterverhaltens mittels probabilistischer Simulation. Auf die...
Das Risikocontrolling in der Immobilienbranche hat in den letzten Jahren deutlich an Wichtigkeit gewonnen. Eine Herausforderung ist es, Markttrends fr...
cena: 244,52

 Diffusion and Use of Geographic Information Technologies I. Masser                                H. J. Onsrud 9789401047784 Springer
Diffusion and Use of Geographic Information Technologies

ISBN: 9789401047784 / Angielski / Miękka / 349 str.

ISBN: 9789401047784/Angielski/Miękka/349 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
I. Masser;H. J. Onsrud
This book is based on the premise that research necessary to advance the utility of geographic informatior. systems must extend far beyond concerns with technical issues. The search for formalisms and generalizable principles relative to the behavior and needs of individuals, organizations and institutions is just as important in enabling optimal use of geographic information innovations. This book consists of papers prepared by participants in the NATO Advanced Research Workshop (ARW) on "Modeling the Diffusion and Use of Geographic Information Technologies. " The workshop was held...
This book is based on the premise that research necessary to advance the utility of geographic informatior. systems must extend far beyond concerns wi...
cena: 805,10

 Globalization of Science and Technology: A Way for C.I.S. Countries to New Markets C. Corsi, S. Kudrya 9789401061315 Springer
Globalization of Science and Technology: A Way for C.I.S. Countries to New Markets

ISBN: 9789401061315 / Angielski / Miękka / 122 str.

ISBN: 9789401061315/Angielski/Miękka/122 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
C. Corsi;S. Kudrya
A profound and frank analysis of the problems arising from the impact of free market globalization in CIS countries. Possible new solutions are presented and discussed, especially those based on the key role of innovation. A new, original proposal is made for the development of a 'common technological language', starting from a European standardization of computer aided design and manufacturing (CAD/CAM).
A profound and frank analysis of the problems arising from the impact of free market globalization in CIS countries. Possible new solutions are pres...
cena: 402,53

 Marketing Information Systems Esad Kokic 9783656347385 Grin Verlag
Marketing Information Systems

ISBN: 9783656347385 / Angielski / Miękka / 30 str.

ISBN: 9783656347385/Angielski/Miękka/30 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Esad Kokic
Seminar paper from the year 2012 in the subject Information Management, grade: 20/20, Internacionalni Univerzitet Travnik (Sveučiliste/Univerzitet "Vitez" Travnik), language: Croatian, abstract: 1.UVOD Zbog enormnih količina podataka i informacija koje se u privatnom i poslovnom svijetu obrade, ova era je nazvana era informacija. U poslovnom svijetu se povecava broj izvora podataka i sve je teze doci do korisnih informacija. Traze se rjesenja kako organizirati ove informacije, radi boljih odluka i boljih poslovnih uspjeha. 1.1.PROBLEM, PREDMET I OBJEKTI ISTRAZIVANJA Danas preduzeca...
Seminar paper from the year 2012 in the subject Information Management, grade: 20/20, Internacionalni Univerzitet Travnik (Sveučiliste/Univerzite...
cena: 153,35

 Applied Information Security: A Hands-On Approach Basin, David 9783642436321 Springer
Applied Information Security: A Hands-On Approach

ISBN: 9783642436321 / Angielski / Miękka / 202 str.

ISBN: 9783642436321/Angielski/Miękka/202 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
David Basin; Patrick Schaller; Michael Schlapfer
This book explores fundamental principles for securing IT systems and illustrates them with hands-on experiments that may be carried out by the reader using accompanying software. The experiments highlight key information security problems that arise in modern operating systems, networks, and web applications. The authors explain how to identify and exploit such problems and they show different countermeasures and their implementation. The reader thus gains a detailed understanding of how vulnerabilities arise and practical experience tackling them. After presenting the basics of security...
This book explores fundamental principles for securing IT systems and illustrates them with hands-on experiments that may be carried out by the reader...
cena: 181,11

 Recent Trends in Information Reuse and Integration Tansel Ozyer Keivan Kianmehr Mehmet Tan 9783709116890 Springer
Recent Trends in Information Reuse and Integration

ISBN: 9783709116890 / Angielski / Miękka / 400 str.

ISBN: 9783709116890/Angielski/Miękka/400 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Tansel Ozyer; Keivan Kianmehr; Mehmet Tan
The present text aims at helping the reader to maximize the reuse of information. Topics covered include tools and services for creating simple, rich, and reusable knowledge representations to explore strategies for integrating this knowledge into legacy systems. The reuse and integration are essential concepts that must be enforced to avoid duplicating the effort and reinventing the wheel each time in the same field. This problem is investigated from different perspectives. in organizations, high volumes of data from different sources form a big threat for filtering out the information for...
The present text aims at helping the reader to maximize the reuse of information. Topics covered include tools and services for creating simple, rich,...
cena: 402,53

 Sap(r) Erp - Praxishandbuch Projektmanagement: Sap(r) Erp ALS Werkzeug Für Professionelles Projektmanagement - Aktualisiert Auf Ecc 6.0 Gubbels, Holger 9783834816818 Springer
Sap(r) Erp - Praxishandbuch Projektmanagement: Sap(r) Erp ALS Werkzeug Für Professionelles Projektmanagement - Aktualisiert Auf Ecc 6.0

ISBN: 9783834816818 / Niemiecki / Miękka / 315 str.

ISBN: 9783834816818/Niemiecki/Miękka/315 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Holger Gubbels
Projekte rucken vor allem im IT-Sektor immer mehr in den Hauptfokus der Unternehmen. Viele Aufgaben des Projektmanagements lassen sich durch Werkzeuge wie SAP(r) ERP professionell unterstutzen. Das Buch erlautert praxisorientiert die Anwendung von SAP(r) ERP als effizientes Werkzeug fur das Projektmanagement. Ein praktisches Beispiel begleitet den Leser durch das gesamte Buch. Um die Nachvollziehbarkeit zu gewahrleisten, werden fur die verwendete Beispielfirma exemplarisch alle notwendigen Organisationsstrukturen vorgestellt und angelegt."
Projekte rucken vor allem im IT-Sektor immer mehr in den Hauptfokus der Unternehmen. Viele Aufgaben des Projektmanagements lassen sich durch Werkzeuge...
cena: 206,88

 IBM Cognos Bi V10.2 Administration Essentials Mehmood Awan, Khalid 9781782171782 Packt Publishing
IBM Cognos Bi V10.2 Administration Essentials

ISBN: 9781782171782 / Angielski / Miękka / 128 str.

ISBN: 9781782171782/Angielski/Miękka/128 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Khalid Mehmood Awan
IBM Cognos BI v10.2 is an advanced suite of business intelligence tools that empower a business with a wide range of capabilities to plan, design, develop, manage reports, analysis, and design dashboards to deliver effective business intelligence strategies. This book particularly focuses on understanding the administration aspects of managing a Cognos BI environment. This fast-paced guide will provide you with practical hands-on experience of all the necessary features to administer an IBM Cognos environment.
IBM Cognos BI v10.2 is an advanced suite of business intelligence tools that empower a business with a wide range of capabilities to plan, design, dev...
cena: 172,59

 Evaluation of Novel Approaches to Software Engineering: 8th International Conference, Enase 2013, Angers, France, July 4-6, 2013. Revised Selected Pap Filipe, Joaquim 9783642540912 Springer
Evaluation of Novel Approaches to Software Engineering: 8th International Conference, Enase 2013, Angers, France, July 4-6, 2013. Revised Selected Pap

ISBN: 9783642540912 / Angielski / Miękka / 257 str.

ISBN: 9783642540912/Angielski/Miękka/257 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Joaquim Filipe; Leszek A. Maciaszek
This book constitutes the thoroughly refereed proceedings of the 8th International Conference on Evaluation of Novel Approaches to Software Engineering, ENASE 2013, held in Angers, France, in July 2013. The 18 full papers presented were carefully reviewed and selected from 46 submissions. The papers reflect a growing effort to increase the dissemination of new results among researchers and professionals related to evaluation of novel approaches to software engineering. By comparing novel approaches with established traditional practices and by evaluating them against software quality...
This book constitutes the thoroughly refereed proceedings of the 8th International Conference on Evaluation of Novel Approaches to Software Engineerin...
cena: 201,24

 Wissensmanagement in Unternehmen: Wissensmanagement im Technologietransfer bei F&E-Kooperation Grabher, Philipp Andreas 9783656559177 Grin Verlag
Wissensmanagement in Unternehmen: Wissensmanagement im Technologietransfer bei F&E-Kooperation

ISBN: 9783656559177 / Niemiecki / Miękka / 38 str.

ISBN: 9783656559177/Niemiecki/Miękka/38 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Philipp Andreas Grabher
Studienarbeit aus dem Jahr 2012 im Fachbereich Informationswissenschaften, Informationsmanagement, Note: 1, Fachhochschule Vorarlberg GmbH (Wirtschaftsingenieurwesen BSc), Veranstaltung: IT Infrastruktur 2, Sprache: Deutsch, Abstract: , Der Fortschritt lebt vom Austausch des Wissens." sagte einst Albert Einstein. Auch jeder Unternehmenserfolg ist vom Austausch des Wissens abhangig und dies gilt heute mehr denn je. Im Sinne des strategischen Managements, wird das Wissen als Ressource betrachtet und somit liegt das Wissen in Organisationen bei dem einzelnen Wissenstrager. Oft wird das Wissen...
Studienarbeit aus dem Jahr 2012 im Fachbereich Informationswissenschaften, Informationsmanagement, Note: 1, Fachhochschule Vorarlberg GmbH (Wirtschaft...
cena: 165,49

 A Manager's Primer on E-Networking: An Introduction to Enterprise Networking in E-Business Acid Environment Nikolik, Dragan 9789401037440 Springer
A Manager's Primer on E-Networking: An Introduction to Enterprise Networking in E-Business Acid Environment

ISBN: 9789401037440 / Angielski / Miękka / 283 str.

ISBN: 9789401037440/Angielski/Miękka/283 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Dragan Nikolik
The implementation of Enterprise Networks or e-Networking is of paramount importance for organisations. Enterprise-wide networking would warrant that the components of information architecture are organised to harness more out of the organisation's computing power on the desktop. This would also involve establishment of networks that link the various but important subsystems of the enterprise. Our firm belief is that in order to gain a competitive edge the organisations need knowledge and sound strategy. This conviction is particularly true today, considering the pressures from international...
The implementation of Enterprise Networks or e-Networking is of paramount importance for organisations. Enterprise-wide networking would warrant that ...
cena: 201,24

 Technology Transfer H. F. Davidson Marvin J. Cetron Joel D. Goldhar 9789401019224 Springer
Technology Transfer

ISBN: 9789401019224 / Angielski / Miękka / 661 str.

ISBN: 9789401019224/Angielski/Miękka/661 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
H. F. Davidson;Marvin J. Cetron;Joel D. Goldhar
Several formerly independent trends including the in creasing rate of technological change, the demand for greater efficiency and productivity in R&D and innovation, and the need for applying technology to the solution of pressing social and economic problems have recently begun to reinforce each other resulting in renewed interest in technology trans fer activities and research. The proliferation of research efforts in the U. S. and Western Europe, increased corporate and governmental efforts to develop mechanisms and incentives for transfer and the growing closeness between transfer and...
Several formerly independent trends including the in creasing rate of technological change, the demand for greater efficiency and productivity in R&D ...
cena: 402,53

 Integrated Approach to Environmental Data Management Systems Nilgun B. Harmanciogammalu M. N. Alpaslan (Environmental Engineerin S. D. Ozkul (Civil Engineering Dept.) 9789401063678 Springer
Integrated Approach to Environmental Data Management Systems

ISBN: 9789401063678 / Angielski / Miękka / 546 str.

ISBN: 9789401063678/Angielski/Miękka/546 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Nilgun B. Harmanciogammalu;M. N. Alpaslan (Environmental Engineerin;S. D. Ozkul (Civil Engineering Dept.)
An integrated approach to environmental data management is necessitated by the complexity of the environmental problems that need to be addresses, coupled with the interdisciplinary approach that needs to be adopted to solve them. Agenda 21 of the Rio Environmental Conference mandated international programmes and organizations to take steps to develop common data and information management plans, and steps have been taken in this direction.
The key word that defines the framework of the present book is integration'. The book establishes the basics of integrated approaches and covers...
An integrated approach to environmental data management is necessitated by the complexity of the environmental problems that need to be addresses, cou...
cena: 201,24

 SQL Server and Power Pivot - Tabular Modeling Cookbook Te Braak, Paul 9781782170884 Packt Publishing
SQL Server and Power Pivot - Tabular Modeling Cookbook

ISBN: 9781782170884 / Angielski / Miękka / 320 str.

ISBN: 9781782170884/Angielski/Miękka/320 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Paul Te Braak
Over 50 tips and tricks for analytical modeling using Business Intelligence Semantic Models with SQL Server 2012 and PowerPivot Overview * Develop tabular models for personal use* Learn about the modeling techniques which are required to overcome commonly encountered problems and master advanced modeling scenarios* Understand the techniques required to promote personal models to corporate enterprise environments and manage the models in a corporate environment* Learn tips and tricks for querying tabular models and learn how to access the data within them for dynamic reporting including the...
Over 50 tips and tricks for analytical modeling using Business Intelligence Semantic Models with SQL Server 2012 and PowerPivot Overview * Develop tab...
cena: 263,22

 Insightful Knowledge: An Enlightened View of Social Media Strategy & Marketing Monaco, Stephen 9781937829889 Total Publishing and Media
Insightful Knowledge: An Enlightened View of Social Media Strategy & Marketing

ISBN: 9781937829889 / Angielski / Miękka / 196 str.

ISBN: 9781937829889/Angielski/Miękka/196 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Stephen Monaco
An Excellent Business Guide for the Thorough Comprehension and Execution of Social Media Marketing and Adapting Into a Social Business Social media has changed the game, and mastering all aspects of social media marketing is absolutely crucial. Social media marketing has gone from a "nice to have" to a "must have" - the ability for companies to succeed online is no longer a viable option without it. Social media communications can be intimidating. The best way to deal with the trepidation is education. Top marketing expert and social business strategist Stephen Monaco guides you through the...
An Excellent Business Guide for the Thorough Comprehension and Execution of Social Media Marketing and Adapting Into a Social Business Social media h...
cena: 76,88

 Information Security Management, Education and Privacy: Ifip 18th World Computer Congress Tc11 19th International Information Security Workshops 22-27 Deswarte, Yves 9781475780147 Springer
Information Security Management, Education and Privacy: Ifip 18th World Computer Congress Tc11 19th International Information Security Workshops 22-27

ISBN: 9781475780147 / Angielski / Miękka / 313 str.

ISBN: 9781475780147/Angielski/Miękka/313 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Yves Deswarte; Frederic Cuppens; Sushil Jajodia
This volume gathers the papers presented at three workshops that are embedded in the IFIP/Sec Conference in 2004, to enlighten specific topics that are currently particularly active in Security. The first one is the 10th IFIP Annual Working Conference on Information Security Management. It is organized by the IFIP WG 11. 1, which is itself dedicated to Information Security Management, i. e., not only to the practical implementation of new security technology issued from recent research and development, but also and mostly to the improvement of security practice in all organizations, from...
This volume gathers the papers presented at three workshops that are embedded in the IFIP/Sec Conference in 2004, to enlighten specific topics that ar...
cena: 402,53

 Bilanzanalyse Mit MS Access Jorg Hartung Jorg Hartung 9783528058968 Vieweg+teubner Verlag
Bilanzanalyse Mit MS Access

ISBN: 9783528058968 / Niemiecki / Miękka / 177 str.

ISBN: 9783528058968/Niemiecki/Miękka/177 str.

Termin realizacji zamówienia: ok. 5-8 dni roboczych.
Jorg Hartung;Jorg Hartung
Es wird eine kurzfristige Einarbeitung in die Bilanzanalyse und Unternehmensbewertung auf der Grundlage von Jahresab schlussen realisierbar gemacht. Am Musterbeispiel der "Haar AG" soll gezeigt werden, wie man die vorliegenden Jahresabschlussdaten aufbereitet und die Kennzahlen berechnet, um realistische Beurteilungen der wirt schaftlichen Lage eines Unternehmens vornehmen zu konnen. Zur effektiven Bilanzanalyse kommt Access zum Einsatz. Dieses Buch zeigt, wie man Jahresabschlussanalysen in Access durchfuhrt. Dadurch wird die Arbeitszeit in erheblichem Masse verkurzt. Hier liegt die...
Es wird eine kurzfristige Einarbeitung in die Bilanzanalyse und Unternehmensbewertung auf der Grundlage von Jahresab schlussen realisierbar gemacht. A...
cena: 206,88

Pierwsza Podprzednia  316  317  318  Następna Ostatnia

Facebook - konto krainaksiazek.pl



Opinie o Krainaksiazek.pl na Opineo.pl

Partner Mybenefit

Krainaksiazek.pl w programie rzetelna firma Krainaksiaze.pl - płatności przez paypal

Czytaj nas na:

Facebook - krainaksiazek.pl
  • książki na zamówienie
  • granty
  • książka na prezent
  • kontakt
  • pomoc
  • opinie
  • regulamin
  • polityka prywatności

Zobacz:

  • Księgarnia czeska

  • Wydawnictwo Książkowe Klimaty

1997-2026 DolnySlask.com Agencja Internetowa

© 1997-2022 krainaksiazek.pl
     
KONTAKT | REGULAMIN | POLITYKA PRYWATNOŚCI | USTAWIENIA PRYWATNOŚCI
Zobacz: Księgarnia Czeska | Wydawnictwo Książkowe Klimaty | Mapa strony | Lista autorów
KrainaKsiazek.PL - Księgarnia Internetowa
Polityka prywatnosci - link
Krainaksiazek.pl - płatnośc Przelewy24
Przechowalnia Przechowalnia