top

  Info

  • Utilizzare la checkbox di selezione a fianco di ciascun documento per attivare le funzionalità di stampa, invio email, download nei formati disponibili del (i) record.

  Info

  • Utilizzare questo link per rimuovere la selezione effettuata.
Balkan and eastern European countries in the midst of the global economic crisis / / Anastasios Karasavvoglou, Persefoni Polychronidou, editors
Balkan and eastern European countries in the midst of the global economic crisis / / Anastasios Karasavvoglou, Persefoni Polychronidou, editors
Edizione [1st ed. 2013.]
Pubbl/distr/stampa Berlin ; ; New York, : Springer, 2012, c2013
Descrizione fisica 1 online resource (175 p.)
Disciplina 600
Altri autori (Persone) KarasavvoglouAnastasios G
PolychronidouPersefoni
Collana Contributions to economics
Soggetto topico Monetary policy - Europe, Eastern
Global Financial Crisis, 2008-2009
ISBN 1-283-52914-9
9786613841599
3-7908-2873-4
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto European Union, Economic Relations and Macroeconomics: Origins of Foreign Direct Investment in Croatia: Application of an Expanded Gravity Model -- Balkan Area and EU-15: An Empirical Investigation of Income Convergence -- The Economic Relations of Bosnia-Herzegovina and FYROM with the Other States that Emerged from the Breakup of Yugoslavia Considering the Ohrid and Dayton Agreements -- The Impact of Inflation Targeting Policy on the Inflation Uncertainty in Turkey -- Fiscal Policy Under the EMU -- Finance and Banking: Central Banks Between Classicism and Modernity -- Credit Risk in the Romanian Banking System: Evidence from an ARDL Model -- Regional Policy, Rural Development and Information Society: Competitveness and Cohesion in the European Union: A Dilemma?- Local Cooperation: A Dynamic Force for Endogenous Rural Development -- Exploring Consumers' Purchasing Behaviour Regarding Organic Wine in a Convergence EU Region: The Case of East Macedonia and Thrace, Greece -- Information Society: Statistical Profiles and Development Stages.
Record Nr. UNINA-9910438081603321
Berlin ; ; New York, : Springer, 2012, c2013
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Building Economic Resilience : Strategies for Sustainable Growth and Competitiveness / / edited by Ilona Bartuseviciene, Buracas Antanas, Anastasios Karasavvoglou, Persefoni Polychronidou
Building Economic Resilience : Strategies for Sustainable Growth and Competitiveness / / edited by Ilona Bartuseviciene, Buracas Antanas, Anastasios Karasavvoglou, Persefoni Polychronidou
Autore Bartuseviciene Ilona
Edizione [1st ed. 2025.]
Pubbl/distr/stampa Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2025
Descrizione fisica 1 online resource (380 pages)
Disciplina 333.7
Altri autori (Persone) AntanasBuracas
KarasavvoglouAnastasios
PolychronidouPersefoni
Collana Contributions to Economics
Soggetto topico Environmental economics
International economic relations
Business enterprises - Finance
Management
Environmental Economics
International Economics
Corporate Finance
ISBN 3-031-96428-4
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Cohesion policy for economic resilience in eastern members of the European Union in the context of geopolitics -- Measuring the financial resilience of sectoral indices: an analysis of financial crises in Turkey -- A social network analysis of certain macroeconomic indicators of European Union NUTS 2 regions -- Assessing sustainable competitiveness of Balkan economies using the entropy-based Promethee method -- Building resilience in the service industry: a study on non-conformities typology in logistics -- Aligning Management and Employee Perspectives: A Key to Organizational Resilience in Uncertain Times -- Digital indicators for the evaluation of the organizational development: American and Finnish methodologies -- Sustainability in the packaging industry. A small step for one - a huge contribution to the economy -- Advancing sustainable development in central and eastern Europe: the interplay of environment, energy, and economy -- EU membership and institutional governance in advancing climate change mitigation: a comparative analysis of the Balkan economies -- Smart grid ETFs: evaluating risk, return, and diversification benefits in sustainable investment portfolios.
Record Nr. UNINA-9911022463103321
Bartuseviciene Ilona  
Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2025
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Building Resilience Through Digital Transformation and Sustainable Innovation : Proceedings of the 16th International Conference on the Economies of the Balkan and Eastern European Countries (EBEEC) in Vilnius, Lithuania, 2024 / / edited by Ilona Bartuseviciene, Buracas Antanas, Anastasios Karasavvoglou, Persefoni Polychronidou
Building Resilience Through Digital Transformation and Sustainable Innovation : Proceedings of the 16th International Conference on the Economies of the Balkan and Eastern European Countries (EBEEC) in Vilnius, Lithuania, 2024 / / edited by Ilona Bartuseviciene, Buracas Antanas, Anastasios Karasavvoglou, Persefoni Polychronidou
Autore Bartuseviciene Ilona
Edizione [1st ed. 2025.]
Pubbl/distr/stampa Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2025
Descrizione fisica 1 online resource (471 pages)
Disciplina 333.79
Altri autori (Persone) AntanasBuracas
KarasavvoglouAnastasios
PolychronidouPersefoni
Collana Springer Proceedings in Business and Economics
Soggetto topico Power resources
Environmental economics
International economic relations
International business enterprises
Management
Resource and Environmental Economics
International Economics
International Business
ISBN 9783031900549
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Economic security and resilience in the era of COVID-19: A comparative analysis of the economies of Greece, Spain,Italy, and Portugal -- Reliance on insurance: an investigation into the current dynamics in the Balkans -- Politics of IMF lending in times of crisis: Greece and Argentina -- Croatian exchange rate stability and long-term interest rates in light of the adoption of the euro.
Record Nr. UNINA-9911011779203321
Bartuseviciene Ilona  
Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2025
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Business performance and financial institutions in Europe : business models and value creation across European industries / / edited by Alexandra Horobet, Persefoni Polychronidou, Anastasios G. Karasavvoglou
Business performance and financial institutions in Europe : business models and value creation across European industries / / edited by Alexandra Horobet, Persefoni Polychronidou, Anastasios G. Karasavvoglou
Edizione [1st ed. 2020.]
Pubbl/distr/stampa Cham, Switzerland : , : Springer, , [2020]
Descrizione fisica 1 online resource (XIX, 163 p. 14 illus., 10 illus. in color.)
Disciplina 658.0094
Collana Contributions to Economics
Soggetto topico Financial institutions - Europe
Bank marketing
Management - Europe
ISBN 3-030-57517-9
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Evolution of airline business models: the case of pegasus Airlines -- Tendencies of trade in business services in visegrad countries -- Mapping economic in the european union: do ownership, industry and location matter? -- The driving forces of business R@D intensity in eastern european countries -- Competitiveness, profitability and R/D intensity: the case of the domestic pharmaceutical industry in greece -- MCDM approach for assessment of financial performance of serbian banks.
Record Nr. UNINA-9910468242803321
Cham, Switzerland : , : Springer, , [2020]
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Business Performance and Financial Institutions in Europe : Business Models and Value Creation Across European Industries / / edited by Alexandra Horobet, Persefoni Polychronidou, Anastasios Karasavvoglou
Business Performance and Financial Institutions in Europe : Business Models and Value Creation Across European Industries / / edited by Alexandra Horobet, Persefoni Polychronidou, Anastasios Karasavvoglou
Edizione [1st ed. 2020.]
Pubbl/distr/stampa Cham : , : Springer International Publishing : , : Imprint : Springer, , 2020
Descrizione fisica 1 online resource (XIX, 163 p. 14 illus., 10 illus. in color.)
Disciplina 658.0094
Collana Contributions to Economics
Soggetto topico Financial services industry
Management
Macroeconomics
Entrepreneurship
New business enterprises
Financial Services
Macroeconomics and Monetary Economics
ISBN 3-030-57517-9
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Evolution of airline business models: the case of pegasus Airlines -- Tendencies of trade in business services in visegrad countries -- Mapping economic in the european union: do ownership, industry and location matter? -- The driving forces of business R@D intensity in eastern european countries -- Competitiveness, profitability and R/D intensity: the case of the domestic pharmaceutical industry in greece -- MCDM approach for assessment of financial performance of serbian banks.
Record Nr. UNINA-9910863157403321
Cham : , : Springer International Publishing : , : Imprint : Springer, , 2020
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Challenges of Healthcare Systems in the Era of COVID-19 : Management Practices, Services Innovation and Reforms / / edited by Niccolò Persiani, Ilaria Elisa Vannini, Anna Romiti, Anastasios Karasavvoglou, Persefoni Polychronidou
Challenges of Healthcare Systems in the Era of COVID-19 : Management Practices, Services Innovation and Reforms / / edited by Niccolò Persiani, Ilaria Elisa Vannini, Anna Romiti, Anastasios Karasavvoglou, Persefoni Polychronidou
Autore Persiani Niccolò
Edizione [1st ed. 2023.]
Pubbl/distr/stampa Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2023
Descrizione fisica 1 online resource (259 pages)
Disciplina 362.1
Altri autori (Persone) VanniniIlaria Elisa
RomitiAnna
KarasavvoglouAnastasios
PolychronidouPersefoni
Collana Contributions to Management Science
Soggetto topico Health services administration
Medical economics
Medical care
Health Care Management
Health Economics
Health Care
ISBN 9783031431142
3031431146
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Part I - Policies, Governance and Strategies -- Chapter 1. COMMUNICATION STRATEGY IN HEALTHCARE ORGANIZATIONS DURING COVID-19 CRISIS: INSIGHTS FROM THE ITALIAN CONTEXT -- Chapter 2. Rethinking healthcare organizations in the era of Covid-19: Lessons from the pandemic -- Chapter 3. ITALIAN HEALTH PROFESSIONS OF THE TECHNICAL, REHABILITATION AND PREVENTION AREAS TO SUPPORT THE REFORM OF THEIR NATIONAL HEALTHCARE SYSTEM AFTER COVID-19 PANDEMIC -- Chapter 4. LOCATION STRATEGIES OF HEALTHCARE FACILITIES: THE CASE OF PRIVATE HOSPITALS IN ANKARA -- Chapter 5. CORPORATE DISCLOSURE OF VACCINE PRODUCERS AFTER COVID-19 DISEASE -- Chapter 6. THE ROLE OF LOCAL GOVERNMENT IN THE PROVISION OF HEALTH SERVICES WITH ADDITIONALLY REFERENCE TO COVID-19 PANDEMIC: EVIDENCE FROM THE CROATIAN HEALTH SYSTEM -- Chapter 7. THE IMPACT OF COVID-19 PANDEMIC ON THE HEALTH RIGHT IN POLAND -- Chapter 8. SUPPORT FOR SMES IN GREECE AND POLAND DURING COVID-19 -- Part II - Financing and performance -- Chapter 9. COVID-19 COSTS AND NATIONAL FINANCING SYSTEM: EVIDENCE FROM ITALY -- Chapter 10. FACTORS AFFECTING THE HEALTH CARE EXPENDITURE IN ALBANIA: A MACROECONOMIC ANALYSIS -- Chapter 11. THE CHALLENGES OF MEASURING PERFORMANCE IN PANDEMIC TIMES. EVIDENCE FROM ITALY -- Chapter 12. THE MONITORING PROCESS OF PUBLIC-PRIVATE PARTNERSHIP (PPP) IN THE HEALTH CARE SYSTEM. THE CASE OF ALBANIA -- Chapter 13. Healthcare Efficiency Assessment in the Southeastern European Countries Using Two-Stage DEA Analysis -- Part III - Operations -- Chapter 14. REORGANIZATION OF THE COMMUNITY CARE MODEL BASED ON EVOLVING NEEDS AND SOLUTIONS: THE TUSCAN CASE, TRANSFORMING PANDEMIC INTO OPPORTUNITY -- Chapter 15. USING TELEMEDICINE IN ORGANIZING HEALTH EMERGENCY. AN ANALYSIS OF COUNTRY-BASED EXPERIENCES DURING THE COVID-19 -- Chapter 16. THE IMPACT OF PROPER SURGERY PLANNING ON OPERATING ROOM EFFICIENCY. AN ITALIAN CASE STUDY IN 2021. Chapter 17. PRIVACY AND SECURITY IN DIGITAL HEALTH IN THE WESTERN BALKANS DURING THE COVID-19 PANDEMIC.
Record Nr. UNINA-9910765492303321
Persiani Niccolò  
Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2023
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
The changing financial landscape : financial performance analysis of real and banking sectors in Europe / / edited by Goran Karanović, Persefoni Polychronidou, and Anastasios Karasavvoglou
The changing financial landscape : financial performance analysis of real and banking sectors in Europe / / edited by Goran Karanović, Persefoni Polychronidou, and Anastasios Karasavvoglou
Pubbl/distr/stampa Cham, Switzerland : , : Springer, , [2021]
Descrizione fisica 1 online resource (249 pages)
Disciplina 332.10943
Collana Contributions to Economics
Soggetto topico Business enterprises - Finance
ISBN 3-030-82778-X
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910520079903321
Cham, Switzerland : , : Springer, , [2021]
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Digital Economy and Green Growth : Opportunities and Challenges for Urban and Regional Ecosystems / / edited by Maria Mavri, Patricia Ikouta Mazza, Anastasios Karasavvoglou, Persefoni Polychronidou
Digital Economy and Green Growth : Opportunities and Challenges for Urban and Regional Ecosystems / / edited by Maria Mavri, Patricia Ikouta Mazza, Anastasios Karasavvoglou, Persefoni Polychronidou
Autore Mavri Maria
Edizione [1st ed. 2024.]
Pubbl/distr/stampa Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2024
Descrizione fisica 1 online resource (216 pages)
Disciplina 333.70947
Altri autori (Persone) Ikouta MazzaPatricia
KarasavvoglouAnastasios
PolychronidouPersefoni
Collana Contributions to Economics
Soggetto topico Regional economics
Space in economics
Microeconomics
International business enterprises
Regional and Spatial Economics
International Business
ISBN 9783031666698
3031666690
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Chapter 1. Digital Economy , Green Growth, Regional and Sustainable Development, Digital Transformation: a brief literature review (Patricia Ikouta Mazza) -- Part I. Digital Transformation and Digital Government -- Chapter 2. Digitalization and Its Limits in Reducing Economic and Social Divide in Northern Greece (Vesna Lukovic) -- Chapter 3. Readiness assessment of EU countries to achieve the Smart Sustainable development goals through the Digital Transformation of Local Government (Dimitris Papandreou) -- Chapter 4. Building a Smarter Government using Machine Learning Applications: Benefits and Challenges (Eirini Manga) -- Chapter 5. Cloud Governance in the European Union: unlocking the power of data in the era of the Digital Economy (Panagiotis Kitsos) -- Chapter 6. Citizens’ attitudes towards e - Government applications (Lambros Tsourgiannis) -- Chapter 7. Digitization and e- Government: a systematic literature review for the European Union (EU 27) and the United Kingdom (Kasabali Konstadina) -- Part II. Regional, Sustainable and Smart Growth -- Chapter 8. Technological Transformations and Global Value Chains: Strategic Challenges for Europe and its Territory (Roberta Capello) -- Chapter 9. Debunking common misconceptions about Smart Cities (Chiara F. Del Bo) -- Chapter 10. Generation Y, Generation Z and their perception of work life (Simge Dindar Tiraş) -- Chapter 10. Current crises and Sustainable Development goals – a Regional Approach (Artemis Giourgali).
Record Nr. UNINA-9910920446503321
Mavri Maria  
Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2024
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Economic and Financial Challenges for Balkan and Eastern European Countries : Proceedings of the 10th International Conference on the Economies of the Balkan and Eastern European Countries in the Changing World (EBEEC) in Warsaw, Poland 2018 / / edited by Marietta Janowicz-Lomott, Krzysztof Łyskawa, Persefoni Polychronidou, Anastasios Karasavvoglou
Economic and Financial Challenges for Balkan and Eastern European Countries : Proceedings of the 10th International Conference on the Economies of the Balkan and Eastern European Countries in the Changing World (EBEEC) in Warsaw, Poland 2018 / / edited by Marietta Janowicz-Lomott, Krzysztof Łyskawa, Persefoni Polychronidou, Anastasios Karasavvoglou
Edizione [1st ed. 2020.]
Pubbl/distr/stampa Cham : , : Springer International Publishing : , : Imprint : Springer, , 2020
Descrizione fisica 1 online resource (348 pages)
Disciplina 338.9496
Collana Springer Proceedings in Business and Economics
Soggetto topico Macroeconomics
International economic relations
Economic development
Banks and banking
Macroeconomics/Monetary Economics//Financial Economics
International Economics
Economic Growth
Banking
ISBN 3-030-39927-3
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Political Risk Complementarity Between Business Economics and International Relations -- The Impact of Public Debt on Economic Growth: Empirical Analyses for Western Balkan Countries -- Inflation and Economic Growth in Turkey -- Distance as Determinant of FDI in Transition Countries -- The Financial Services Exports of China and the Role of RMB -- The Succession in SME’s -- Innovativeness of Serbian Enterprises as a Factor of Competitiveness Improvement at the International Market -- Electric Energy Sector in Turkey and Energy Trading Between Turkey and Balkan Countries -- Profitability Determinants of Insurance Companies in the Republic of Serbia -- Instruments for Financing Damage in Animal Production in Poland and the European Union -- Determinants of Demand for Private Voluntary Health Insurance -- Healthcare Goods and Services -- The Path for Introducing Diagnosis Related Groups (DRGs) in Albanian Healthcare -- On a Bertrand Dynamic Game with Differentiated Goods, Heterogeneous Expectations and Asymmetric Cost Functions -- Forecasting Meal Requirements Using Time Series Methods in Organization -- The Upcoming Role of the Enterprise Architect -- A Hierarchical Analysis of Internet Adoption and Usage by the Seniors -- What Happened in Turkey after Booking.Com Limitation: Sentiment Analysis of Tweets via Text Mining -- Sentiment Analysis of How Turkish Customers Effect from Paypal Closure -- What Is the Priority of the Political Rhetoric of the Russian Presidents.
Record Nr. UNINA-9910409670903321
Cham : , : Springer International Publishing : , : Imprint : Springer, , 2020
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Economic and Financial Challenges for Eastern Europe : Proceedings of the 9th International Conference on the Economies of the Balkan and Eastern European Countries in the Changing World (EBEEC) in Athens, Greece, 2017 / / edited by Nicos Sykianakis, Persefoni Polychronidou, Anastasios Karasavvoglou
Economic and Financial Challenges for Eastern Europe : Proceedings of the 9th International Conference on the Economies of the Balkan and Eastern European Countries in the Changing World (EBEEC) in Athens, Greece, 2017 / / edited by Nicos Sykianakis, Persefoni Polychronidou, Anastasios Karasavvoglou
Edizione [1st ed. 2019.]
Pubbl/distr/stampa Cham : , : Springer International Publishing : , : Imprint : Springer, , 2019
Descrizione fisica 1 online resource (546 pages)
Disciplina 914.3
339
Collana Springer Proceedings in Business and Economics
Soggetto topico Macroeconomics
Europe - Economic integration
Economic policy
Finance
History
Economic development
Management
Macroeconomics and Monetary Economics
European Economic Integration
Economic Policy
Financial History
Economic Growth
ISBN 3-030-12169-0
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Financial Crisis and Brain Drain: An Investigation of the Emigration Intentions of Greek Scientists -- Complexity in a Bertrand Duopoly Game with Heterogeneous Players and Differentiated Goods -- A Performance Measurement System for Staff of the Logistics Section - A Case Study for an Oil & Gas Company -- Banks' Income Smoothing in the Basel Period - Evidence from European Union -- Evaluating Consumer Perception and Expectations and Assessing the Service Quality Gap in Greek Banking in a Period of Finical Crisis and Capital Controls -- The Role of Tertiary Education in Regional Development in Greece -- The Importance of Trade with the Balkan Countries for Turkey -- Barriers in the Calculation of Residual Income in Slovak Companies -- Social Choice and Multicriterion Decision-Making: Decision Modeling Career of Students in Secondary Education Using Multi-Criteria Analysis -- Greek Banks Abroad: A Historic Examination -- Corporate Financial Modelling Using Quantitative Methods -- Using Principal Component Analysis in Assessing Client's Creditworthiness -- The Way Out From Public Sector’s Labyrinth of Inefficiency? Alternative Governance Performance and Prospects in Greece -- Competitiveness of the Greek Economy: Before and After the Crisis -- Development of an Insurance Market in „Pigs" Countries After the Crisis -- Usage Evaluation Through Data Analysis of the Greek Tax Information System -- Urban Development -- The Impact of Communication Quality, Partner Complementarity and Foreign Partner’s Cultural Sensitivity on Inter-Partner Trust in Isas -- Digital Practices of Greek Small Entrepreneurship: Social Media and Self-Employment -- The Conversion of Βank Deferred Tax Assets in 2016 to Bank Shares in 2017 -- Quality Assurance in Education: An Inquiry Into Transformational School Leadership -- The Impact of the Destination Image of Greece on Tourists’ Behavioral Intentions -- A Differential Equations Analysis of Stock Prices -- Cash Conversion Cycle and Firms Performance. Empirical Study for the Greek Listed Firms in Athens Stock Exchange -- Creativity Development and Educational Expenditures - An Exploratory Study -- Professors and Graduates at Greek Universities -- The Three Paradigms of Social Organization -- Prospective Employee Attitudes Towards Public and Private Sector Employment - A Comparison Study of a Belgian and Two Greek University Student Groups -- Aspirin Methodics of Business-Planning -- Exploring Irrigation Water Issue Through Quantitative Swot Analysis: The Case of Nestos River Basin -- How Do Mosquitoes Affect Tourism Enterprises in Greece? -- The Relationship Between Efficiency Measures and Environmental Pollution: An Empirical Study -- Exploring the Teaching Quality of Greek Accounting Studies -- Corporate Governance: A Comparative Analysis of the Accounts of the Telephone Companies Cosmote, Vodafone and Wind -- A Quantitative Analysis About Optimization of Number of Employees and Rebalancing Workload -- The Effects of the Reformed CAP to the Local Economy, In Rural Areas.
Record Nr. UNINA-9910349362303321
Cham : , : Springer International Publishing : , : Imprint : Springer, , 2019
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui