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  • SAGE Publications  (46)
  • 2015-2019  (46)
  • 1
    Online Resource
    Online Resource
    Efficient encrypted image retrieval in IoT-cloud with multi-user authentication
    SAGE Publications ; 2018
    In:  International Journal of Distributed Sensor Networks Vol. 14, No. 2 ( 2018-02), p. 155014771876181-
    Details
    In: International Journal of Distributed Sensor Networks, SAGE Publications, Vol. 14, No. 2 ( 2018-02), p. 155014771876181-
    Abstract: Encryption is one of the best methods to safeguard the security and privacy of an image. However, looking through encrypted data is difficult. A number of techniques for searching encrypted data have been devised. However, certain security solutions may not be used in smart devices in IoT-cloud because such solutions are not lightweight. In this article, we present a lightweight scheme that can enable a content-based search through encrypted images. In particular, images are represented using local features. We develop and validate a secure scheme for measuring the Euclidean distance between two feature vectors. In addition, we use a hashing method, namely, locality-sensitive hashing, to devise the searchable index. The use of an locality-sensitive hashing index increases the proficiency and effectiveness of a system, thereby allowing the retrieval of only relevant images with a minimum number of distance evaluations. Refining vector techniques are used to refine relevant results efficiently and securely. Our index construction process ensures that stored data and trapdoors are kept private. Our system also efficiently supports multi-user authentication by avoiding the expensive traditional method, which enables data owners to define who can search for a specific image. Compared with other similarity-based encryption methods predicated upon searchability, the option presented in this study offers superior search speed and storage efficiency.
    Type of Medium: Online Resource
    ISSN: 1550-1477 , 1550-1477
    URL: Article
    DOI: 10.1177/1550147718761814
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2192922-1
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  • 2
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    Online Resource
    Establishing the upper performance limit of destination elevator group control using idealised optimal benchmarks
    SAGE Publications ; 2015
    In:  Building Services Engineering Research and Technology Vol. 36, No. 5 ( 2015-09), p. 546-566
    Details
    In: Building Services Engineering Research and Technology, SAGE Publications, Vol. 36, No. 5 ( 2015-09), p. 546-566
    Abstract: The concept of an idealised optimal benchmark (IOB) is used in many engineering disciplines. An example of an IOB from the area of thermodynamics is the formula for evaluating the maximum possible efficiency of a heat engine. This paper explores the concept of an IOB in the area of elevator traffic analysis. It shows that the classical method of elevator traffic design by calculating the value of the round trip time is an example of an IOB; it also lists the assumptions that lie behind the formulae to illustrate this. It then extends the concept of an IOB to calculating the maximum performance of an elevator system when destination group control is applied under incoming traffic conditions. Formulae are derived for finding the minimum values of the expected number of stops ( S) and the highest reversal floor ( H) under destination group control during incoming traffic conditions. The assumption is that the L elevators in the group are sequenced (or rotated) to the L virtual sectors in the building, in order to equalise the handling capacities of the L sectors in the group. A numerical example is presented to illustrate the calculation of the maximum possible handling capacity and comparing it to the handling capacity that is achieved under conventional incoming traffic group control. Three numerical algorithms are also used to find the practical minimum values of H and S, the results of which are compared to the IOB using the equations derived above. Practical application: The concept and the accompanying formulae presented in this paper allow the elevator traffic designer to assess the improvement in the handling capacity of the elevator traffic system when he/she changes the group controller from a conventional group controller to a destination group controller. This improvement could be as much as 200%.
    Type of Medium: Online Resource
    ISSN: 0143-6244 , 1477-0849
    URL: Article
    DOI: 10.1177/0143624414566996
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2015
    detail.hit.zdb_id: 2053866-2
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  • 3
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    Online Resource
    Evaluating the performance of elevator group control algorithms using a three-element new paradigm
    SAGE Publications ; 2016
    In:  Building Services Engineering Research and Technology Vol. 37, No. 5 ( 2016-09), p. 597-613
    Details
    In: Building Services Engineering Research and Technology, SAGE Publications, Vol. 37, No. 5 ( 2016-09), p. 597-613
    Abstract: This paper presents a new paradigm for assessing the effectiveness of up-peak elevator group control algorithms. The new paradigm can be very effective in providing a mechanism for objectively assessing and comparing elevator group control algorithms. It is built around three essential components: idealised optimal benchmarks; random scenario testing; and progressive introduction of reality. An idealised optimal benchmark is the starting point for calculating an analytical upper bound for the performance of any algorithm. It provides a reference for comparing the performance of all algorithms. Random scenario testing is used to subject the elevator group controller to a randomly generated scenario (usually of passenger origin-destination pairs). The response of the group controller to a randomly generated scenario is recorded, and more scenarios are generated and added. The overall response (e.g., average of all responses) of the group control algorithm to the large number of scenarios represents an objective measure of its efficacy. The random scenario testing is first carried out under idealised or partially idealised conditions. Under the third component of the new paradigm, the conditions are gradually made more realistic and better reflective of reality. This third element is called the progressive introduction of reality. Practical application: This paper presents to the designer of the elevator group controller a new paradigm for assessing the benchmark against which he/she is working. The designer can be confident that whatever up-peak group control algorithm he/she develops, it cannot exceed this upper benchmark. This has important practical applications in benchmarking the performance of up-peak group controllers. It can also be used by consultants and clients to mediate elevator group controller performance claims presented by elevator manufacturers.
    Type of Medium: Online Resource
    ISSN: 0143-6244 , 1477-0849
    URL: Article
    DOI: 10.1177/0143624416652182
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 2053866-2
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  • 4
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    Online Resource
    Il-33/St2 Triggering of Il-9-Secreting T Cells: From Proteomics to Therapeutics
    SAGE Publications ; 2016
    In:  Journal of Investigative Medicine Vol. 64, No. 4 ( 2016-03), p. 948-948
    Details
    In: Journal of Investigative Medicine, SAGE Publications, Vol. 64, No. 4 ( 2016-03), p. 948-948
    Type of Medium: Online Resource
    ISSN: 1081-5589 , 1708-8267
    URL: Article
    DOI: 10.1136/jim-2016-000120.73
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
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  • 5
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    Online Resource
    Pulmonary Arterial Enlargement is Associated With Acute Chest Pain in Patients Without Obstructive Coronary Artery Disease
    SAGE Publications ; 2018
    In:  Clinical Medicine Insights: Circulatory, Respiratory and Pulmonary Medicine Vol. 12 ( 2018-01-01), p. 117954841875802-
    Details
    In: Clinical Medicine Insights: Circulatory, Respiratory and Pulmonary Medicine, SAGE Publications, Vol. 12 ( 2018-01-01), p. 117954841875802-
    Abstract: Pulmonary hypertension (PH) is an underdiagnosed cause for chest pain in patients without significant coronary artery disease (CAD). Studies showed that enlarged pulmonary arterial (PA) and right ventricular chamber sizes correlate with the severity of PH. Therefore, we studied the association between chest pain, right ventricular dimensions (RVDs), and PA size on coronary coronary tomographic angiography (CCTA). Methods: The CCTA of 87 patients presenting with chest pain without evidence of obstructive CAD was examined. The PA diameter (PAD), right atrial dimension (RAD), and RVD were measured. A comparative control cohort included 31 patients who presented without cardiopulmonary complaints and underwent thoracic CT. The risk for obstructive sleep apnea (OSA) was assessed using STOP-BANG questionnaires. Results: Patients with chest pain without obstructive CAD showed markedly dilated right atrial and ventricular chambers compared with standard parameters (right atrium: 48 ± 6.4 mm; right ventricle long axis: 61 ± 9.5 mm). When comparing chest pain vs non-chest pain group, respectively, the mean PAD measured 25.92 ± 0.43 mm vs 22.89 ± 0.38 mm ( P  〈  .001), RAD2 measured 40.1423 ± 0.7108 mm vs 34.8800 ± 1.0245 mm ( P = .0048), and RVD2 measured 31.7729 ± 0.7299 mm vs 27.6379 ± 1.6178 mm ( P = .034). Chest pain was associated with higher PAD (odds ratio [OR]: 11.11, P  〈  .05) after adjusting for age, sex, body mass index, history of hypertension, hyperlipidemia, congestive heart failure, chronic obstructive pulmonary disease, OSA, and smoking. The chest pain group had a mean STOP-BANG score of 3.9 ± 1.8 in all patients, and 3.62 ± 0.20 in patients without known history of OSA, representing an elevated risk index for the disease. Conclusions: In patients presenting with chest pain without obstructive CAD on CCTA, there is a strong association between the presence of chest pain and enlarged PAD. They also represent a high-risk group for OSA.
    Type of Medium: Online Resource
    ISSN: 1179-5484 , 1179-5484
    URL: Article
    DOI: 10.1177/1179548418758021
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2583465-4
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  • 6
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    Online Resource
    Comparative Analysis of Dorsal Nerve Transfer vs Dorsal Neurectomy in Morton’s Neuroma
    SAGE Publications ; 2019
    In:  Foot & Ankle Orthopaedics Vol. 4, No. 4 ( 2019-10-01), p. 2473011419S0025-
    Details
    In: Foot & Ankle Orthopaedics, SAGE Publications, Vol. 4, No. 4 ( 2019-10-01), p. 2473011419S0025-
    Abstract: Lesser Toes, Midfoot/Forefoot Introduction/Purpose: Comparative analysis of Dorsal Nerve Transfer and Dorsal Neurectomy in Surgical management of Morton’s Neuroma Methods: This clinical audit was conducted on patients who had undergone surgery for Morton’s neuroma (MN) between 2002 and 2014. Data was collected using an in-depth review of patients’ case-notes. During the period studied, there were a total of 77 patients, 4 the DNT and 40 in the DN groups. The key indication for surgery in all cases reviewed was failure of the condition to improve using conservative methods. A telephonic survey with Primary outcome measure being Coughlin’s Overall patient’s satisfaction criteria and secondary outcome measures were resolution of sensory symptoms and any footwear restrictions. Results: The results of this clinical study shows excellent to good results with the Dorsal nerve transfer group (84%) and Dorsal neurectomy (80%). There were poor results in 11% in the DNT group and 15% in the DN group. Key advantages of Dorsal nerve transfer are better resolution of sensory symptoms in the toes (82%) when compared to Dorsal Neurectomy (65%). 7% reported Nov change and 11% were worse after surgery. 20% had no change and 15% were worse following surgery in DN group. Around 83% had no restriction wearing any footwear in the DNT group when compared to 80%. 17% in the DNT group and 20% were in the DN group wore modified or shoes with no heels. Conclusion: In general there is no significant difference in the outcome of the two surgery all procedures. Key advantages of Dorsal nerve transfer is better resolution of sensory symptoms in the toes (82%) when compared to Dorsal Neurectomy (65%). Around 83% in DNT group and 80% in DN group had no restriction wearing any footwear gain is almost similar in both groups in the DNT group. Whilst Dorsal nerve transfer is a slightly longer procedure than Dorsal neurectomy as some problems were encountered relating to mobilising the nerve due to overlying prominent blood vessels or nerve anomalies.
    Type of Medium: Online Resource
    ISSN: 2473-0114 , 2473-0114
    URL: Article
    DOI: 10.1177/2473011419S00255
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2874570-X
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  • 7
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    Online Resource
    Microdose acquisition in adolescent leg length discrepancy using a low-dose biplane imaging system
    SAGE Publications ; 2017
    In:  Acta Radiologica Vol. 58, No. 9 ( 2017-09), p. 1108-1114
    Details
    In: Acta Radiologica, SAGE Publications, Vol. 58, No. 9 ( 2017-09), p. 1108-1114
    Abstract: Children with leg length discrepancy often undergo repeat imaging. Therefore, every effort to reduce radiation dose is important. Using low dose preview images and noise reduction software rather than diagnostic images for length measurements might contribute to reducing dose. Purpose To compare leg length measurements performed on diagnostic images and low dose preview images both acquired using a low-dose bi-planar imaging system. Material and Methods Preview and diagnostic images from 22 patients were retrospectively collected (14 girls, 8 boys; mean age, 12.8 years; age range, 10–15 years). All images were anonymized and measured independently by two musculoskeletal radiologists. Three sets of measurements were performed on all images; the mechanical axis lines of the femur and the tibia as well as the anatomical line of the entire extremity. Statistical significance was tested with a paired t-test. Results No statistically significant difference was found between measurements performed on the preview and on the diagnostic image. The mean tibial length difference between the observers was −0.06 cm (95% confidence interval [CI], −0.12 to 0.01) and −0.08 cm (95% CI, −0.21 to 0.05), respectively; 0.10 cm (95% CI, 0.02–0.17) and 0.06 cm (95% CI, −0.02 to 0.14) for the femoral measurements and 0.12 cm (95% CI, −0.05 to 0.26) and 0.08 cm (95% CI, −0.02 to 0.19) for total leg length discrepancy. ICCs were 〉 0.99 indicating excellent inter- and intra-rater reliability. Conclusion The data strongly imply that leg length measurements performed on preview images from a low-dose bi-planar imaging system are comparable to measurements performed on diagnostic images.
    Type of Medium: Online Resource
    ISSN: 0284-1851 , 1600-0455
    URL: Article
    DOI: 10.1177/0284185116682381
    RVK:
    XA 10000
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2024579-8
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  • 8
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    Online Resource
    Beneficial Effect of the SGLT2 Inhibitor Empagliflozin on Glucose Homeostasis and Cardiovascular Parameters in the Cohen Rosenthal Diabetic Hypertensive (CRDH) Rat
    SAGE Publications ; 2018
    In:  Journal of Cardiovascular Pharmacology and Therapeutics Vol. 23, No. 4 ( 2018-07), p. 358-371
    Details
    In: Journal of Cardiovascular Pharmacology and Therapeutics, SAGE Publications, Vol. 23, No. 4 ( 2018-07), p. 358-371
    Abstract: The effectiveness of empagliflozin (EMPA), a sodium glucose cotransporter type 2 inhibitor, on the kidney, pancreas, and heart was investigated in the Cohen Rosenthal diabetic hypertensive rat model (CRDH rat). Six-week-old CRDH male rats were fed a sugar diet (SD) and treated with the compound EMPA (group Drug/SD) or respective comparator with vehicle (group Veh/SD). A control group was fed a regular diet without treatment (group Veh/P). Preventive treatment with EMPA was measured during 4 months of follow-up. The treatment effect was evaluated according to results observed after 4 months in group Drug/SD when compared to those in group Veh/SD. Significant effect resulted in the following parameters: enhancement of urinary glucose excretion in association with diuresis; amelioration of postprandial hyperglycemia and fasting blood glucose levels; and decrease in calculated Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) as well as lower systolic and diastolic blood pressures. At the end of treatment, EMPA preserved nephrin integrity in the kidney, reduced proteinuria, and prevented diabetes-induced damage to glomerular diaphragm structure. In the pancreas, EMPA demonstrated an impressive decrease in fatty infiltration and atrophy. Blood pressure was significantly reduced in the EMPA-treated group (15 ± 5.1 mm Hg, P 〈 .05) in contrast to the vehicle and control groups. Finally, compared to controls, EMPA significantly reduced left ventricle (LV) mass and LV systolic dilatation, according to 2-dimensional echocardiography. The importance of the study lies in demonstrating the efficacy of an antidiabetic drug with beneficial effects on blood pressure, weight, kidney, and pancreas and a positive effect on the heart.
    Type of Medium: Online Resource
    ISSN: 1074-2484 , 1940-4034
    URL: Article
    DOI: 10.1177/1074248418763808
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2230155-0
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  • 9
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    Online Resource
    In-line optical micro-crack detection system for solar wafers
    SAGE Publications ; 2017
    In:  Transactions of the Institute of Measurement and Control Vol. 39, No. 5 ( 2017-05), p. 728-737
    Details
    In: Transactions of the Institute of Measurement and Control, SAGE Publications, Vol. 39, No. 5 ( 2017-05), p. 728-737
    Abstract: A new approach incorporating adaptive lighting intensity for micro-crack inspection of solar wafers with variable thickness is proposed. Wafer thickness is measured with a pair of laser displacement sensors and the lighting intensity is adaptively adjusted to normalize near infrared (NIR) transmission based on measured thickness. This technique enables the image contrast be maintained at relatively uniform intensity in response to the variation of the solar wafer thickness. An improved version of Niblack segmentation algorithm is developed for this application. Experimental results demonstrate the competitiveness of the proposed system compared with established techniques, and achieves better performance both visually and quantitatively. Meanwhile, the runtime is consistently less than 1 s, corresponding to a throughput rate of approximately 3600 wafers/h. These results suggest that the methods and procedures are suitable for online processing of solar wafers.
    Type of Medium: Online Resource
    ISSN: 0142-3312 , 1477-0369
    URL: Article
    DOI: 10.1177/0142331215619974
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2025882-3
    SSG: 3,2
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  • 10
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    Online Resource
    Needs and sources of information for women in the treatment and management of breast cancer in Lagos State, Nigeria
    SAGE Publications ; 2016
    In:  Information Development Vol. 32, No. 2 ( 2016-03), p. 175-185
    Details
    In: Information Development, SAGE Publications, Vol. 32, No. 2 ( 2016-03), p. 175-185
    Abstract: The purpose of this study was to examine the needs and sources of information women with breast cancer found helpful during the treatment procedure. The target population consists of women living in Lagos State who were in the process of breast cancer treatment. A self-administered questionnaire was used to collect data from a purposive sample of 125 women who had been diagnosed and were undergoing treatment in a teaching hospital in Lagos State, Nigeria. Descriptive analysis was used to represent information needs, information sources utilized and helpfulness of the information sources. The result shows that the women expressed a great need for almost all types of information but those with higher levels of education indicated a greater need to know the reasons that their doctors had for suggesting treatments. The data indicated that personal doctors, oncologists, family and friends, mass media and leaflets and brochure were important information sources utilized by respondents; but the major sources of information respondents found very helpful were personal doctors, oncologists, family and friends. The paper concludes with a suggestion for a proactive stance by health sciences librarians and librarians in public libraries in disseminating information to Nigerian women about breast cancer. This could be achieved by guiding them to easily readable, authoritative, and reliable information sources, including local demonstrations on treatment options available. The implications of the findings are discussed and recommendations offered.
    Type of Medium: Online Resource
    ISSN: 0266-6669 , 1741-6469
    URL: Article
    DOI: 10.1177/0266666914537286
    RVK:
    AN 10100
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 89692-5
    detail.hit.zdb_id: 2025059-9
    SSG: 24,1
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