Institution
Tallinn University of Technology
Education•Tallinn, Estonia•
About: Tallinn University of Technology is a education organization based out in Tallinn, Estonia. It is known for research contribution in the topics: European union & Oil shale. The organization has 3688 authors who have published 10313 publications receiving 145058 citations. The organization is also known as: Tallinn Technical University & Tallinna Tehnikaülikool.
Topics: European union, Oil shale, Thin film, Nonlinear system, Microstructure
Papers published on a yearly basis
Papers
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TL;DR: The aim of this survey is to provide a comprehensive overview of the design changes brought in the NB-IoT standardization along with the detailed research developments from the perspectives of Physical and MAC layers.
Abstract: Narrowband internet of things (NB-IoT) is a recent cellular radio access technology based on Long-Term Evolution (LTE) introduced by Third-Generation Partnership Project (3GPP) for Low-Power Wide-Area Networks (LPWAN). The main aim of NB-IoT is to support massive machine-type communication (mMTC) and enable low-power, low-cost, and low-data-rate communication. NB-IoT is based on LTE design with some changes to meet the mMTC requirements. For example, in the physical (PHY) layer only single-antenna and low-order modulations are supported, and in the Medium Access Control (MAC) layers only one physical resource block is allocated for resource scheduling. The aim of this survey is to provide a comprehensive overview of the design changes brought in the NB-IoT standardization along with the detailed research developments from the perspectives of Physical and MAC layers. The survey also includes an overview of Evolved Packet Core (EPC) changes to support the Service Capability Exposure Function (SCEF) to manage both IP and non-IP data packets through Control Plane (CP) and User Plane (UP), the possible deployment scenarios of NB-IoT in future Heterogeneous Wireless Networks (HetNet). Finally, existing and emerging research challenges in this direction are presented to motivate future research activities.
97 citations
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Stockholm School of Economics1, Karolinska Institutet2, Örebro University3, University of Amsterdam4, National Institutes of Health5, University Hospital of North Norway6, University of Michigan7, University of Turku8, University of New South Wales9, Tallinn University of Technology10, Cornell University11
TL;DR: Comparing policies and systems could allow countries to learn from each other to address global and nation-specific challenges, and countries may be able to develop improved policies by examining how other nations have solved common problems.
Abstract: Objectives Patient-accessible electronic health records (PAEHRs) are being implemented at international scale. Comparing policies and systems could allow countries to learn from each other to address global and nation-specific challenges. We compare national PAEHR policy (hard and soft regulation) and services in 10 countries. Methods PAEHR policy and system documentation was gathered from Australia, Denmark, Estonia, Finland, France, the Netherlands, New Zealand, Norway, Sweden and the United States. A basic analytic model for policy analysis was used to delimit our focus to policy content, followed by an inductive thematic analysis across countries, in which we clustered initial themes into a set of categories of PAEHR service “approaches” related to three specific content areas. Results Although all 10 countries ensured some patient rights to access medical records, policies and systems were highly variable, as were the technological processes arising from these. In particular, three policy areas showed great variability. Depending upon country of origin, a patient would encounter differences in: login procedures (security), access to own and other patients’ data during adolescence (user rights), and types of medical data made available to the patient (data sets). Conclusions Individuals encounter very different access rights to their medical data depending on where they live. Countries may be able to develop improved policies by examining how other nations have solved common problems. Harmonizing policies is also an initial step likely to be needed before cross-national PAEHRs could be possible.
97 citations
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18 Oct 2013TL;DR: How the KSI Infrastructure is built, and the lessons learned during the operational period of the service are summarized.
Abstract: Keyless Signatures Infrastructure KSI is a globally distributed system for providing time-stamping and server-supported digital signature services. Global per-second hash trees are created and their root hash values published. We discuss some service quality issues that arise in practical implementation of the service and present solutions for avoiding single points of failure and guaranteeing a service with reasonable and stable delay. Guardtime AS has been operating a KSI Infrastructure for 5 years. We summarize how the KSI Infrastructure is built, and the lessons learned during the operational period of the service.
97 citations
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TL;DR: In older patients with COPD and comorbidities, remote monitoring of lung function by forced oscillation technique and cardiac parameters did not change TTFH and EQ‐5D and an exploratory analysis found telemedicine was associated with fewer repeat hospitalizations.
Abstract: Rationale: Early detection of COPD exacerbations using tele-monitoring of physiological variables might reduce the frequency of hospitalisation. Objectives: To evaluate the efficacy of home monitoring of lung mechanics by the forced oscillation technique (FOT) and cardiac parameters in older COPD patients with co-morbidities.
Methods: This multicentre, randomized clinical trial recruited 312 GOLD grade II-IV COPD patients (median age 71 years [IQR:66-76], 49.6% grade II, 50.4% grade III-IV), with a history of exacerbation in the previous year and at least one non-pulmonary co-morbidity. Patients were randomised to usual care (n=158) or tele-monitoring (n=154) and followed for 9 months. All tele-monitoring patients self-assessed lung mechanics daily and in a subgroup with congestive heart failure (n=37) cardiac parameters were also monitored. An algorithm identified deterioration, triggering a telephone contact to determine appropriate interventions.
Measurements and Main results: Primary outcomes were time to first hospitalisation (TTFH) and change in EQ-5D utility index score. Secondary outcomes included: rate of antibiotic/corticosteroid prescriptions, hospitalisation, CAT, PHQ-9 and MLHF questionnaire scores, quality-adjusted life years and healthcare costs. Tele-monitoring did not affect TTFH, EQ-5D utility index score, antibiotic prescriptions, hospitalization rate and questionnaire scores. In an exploratory analysis, tele-medicine was associated with fewer repeat hospitalizations (-54%, p=0.017).
Conclusions: In older COPD patients with co-morbidities remote monitoring of lung function by FOT and cardiac parameters did not change TTFH and EQ-5D.
Clinical trial registration available at www.clinicaltrials.gov, ID NCT01960907.
97 citations
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TL;DR: The insights of nanotechnology for cellulosic biohydrogen production through dark fermentation are reviewed and recent advancements and feasibility of nanomaterials as the potential solution for improved cellulose conversion to the bioHydrogen production process have been discussed, and this is likely to assist in developing an efficient, economical and sustainable bio Hydrogen production technology.
96 citations
Authors
Showing all 3757 results
Name | H-index | Papers | Citations |
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James Chapman | 82 | 483 | 36468 |
Alexandre Alexakis | 67 | 540 | 17247 |
Bernard Waeber | 56 | 370 | 35335 |
Peter A. Andrekson | 54 | 573 | 12042 |
Charles S. Peirce | 51 | 167 | 11998 |
Lars M. Blank | 49 | 301 | 8011 |
Fushuan Wen | 49 | 465 | 9189 |
Mati Karelson | 48 | 207 | 10210 |
Ago Samoson | 46 | 119 | 8807 |
Zebo Peng | 45 | 359 | 7312 |
Petru Eles | 44 | 300 | 6749 |
Vijai Kumar Gupta | 43 | 301 | 6901 |
Eero Vasar | 43 | 263 | 6930 |
Rik Ossenkoppele | 42 | 192 | 6839 |
Tõnis Timmusk | 41 | 105 | 11056 |