scholarly journals A Mosaic Method for Side-Scan Sonar Strip Images Based on Curvelet Transform and Resolution Constraints

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6044
Author(s):  
Ning Zhang ◽  
Shaohua Jin ◽  
Gang Bian ◽  
Yang Cui ◽  
Liang Chi

Due to the complex marine environment, side-scan sonar signals are unstable, resulting in random non-rigid distortion in side-scan sonar strip images. To reduce the influence of resolution difference of common areas on strip image mosaicking, we proposed a mosaic method for side-scan sonar strip images based on curvelet transform and resolution constraints. First, image registration was carried out to eliminate dislocation and distortion of the strip images. Then, the resolution vector of the common area in two strip images were calculated, and a resolution model was created. Curvelet transform was then performed for the images, the resolution fusion rules were used for Coarse layer coefficients, and the maximum coefficient integration was applied to the Detail layer and Fine layer to calculate the fusion coefficients. Last, inverse Curvelet transform was carried out on the fusion coefficients to obtain images in the fusion area. The fusion images in multiple areas were then combined in the registered images to obtain the final image. The experiment results showed that the proposed method had better mosaicking performance than some conventional fusion algorithms.

2012 ◽  
Vol 22 (1) ◽  
pp. 14-20
Author(s):  
Donald Finan ◽  
Stephen M. Tasko

The history of speech-language pathology as a profession encompasses a tradition of knowledge generation. In recent years, the quantity of speech science research and the presence of speech scientists within the domain of the American Speech-Hearing-Language Association (ASHA) has diminished, even as ASHA membership and the size of the ASHA Convention have grown dramatically. The professional discipline of speech science has become increasingly fragmented, yet speech science coursework is an integral part of the mandated curriculum. Establishing an active, vibrant community structure will serve to aid researchers, educators, and clinicians as they work in the common area of speech science.


Agriculture ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 93 ◽  
Author(s):  
Lilith Schrey ◽  
Nicole Kemper ◽  
Michaela Fels

The aim of this study was to analyse a novel group farrowing system (GH) concerning piglets’ behaviour, skin injuries and body weight gain, to test its animal friendliness. Skin injuries and weight gain were compared to piglets originating from conventional individual housing (IH) before and after weaning. The GH system had five farrowing pens without crates, a common area and an area only available for piglets. In total, 34 litters were studied. Four days after the GH-piglets had left the pens during lactation, the lesion score of piglets in GH was higher than in IH. However, piglets from the GH sustained fewer injuries after mixing at weaning, compared to the piglets from IH and had higher daily weight gains, during the early nursery phase. The common area in GH was intensively used for active behaviour, since standing/walking and playing were observed there, most frequently, whereas lying occurred most frequently inside the pens. Immediately after the piglets had left the pens in the GH, the piglets preferred proximity to the sow, compared to the pens where they were born. The GH system enabled social enrichment, offered increased space for activity and led to fewer skin lesions, after weaning; thus, potentially increasing animal welfare.


Author(s):  
Sean Wei Xiang Ong ◽  
Pei Hua Lee ◽  
Yian Kim Tan ◽  
Li Min Ling ◽  
Benjamin Choon Heng Ho ◽  
...  

Abstract Background: The risk of environmental contamination by severe acute respiratory coronavirus virus 2 (SARS-CoV-2) in the intensive care unit (ICU) is unclear. We evaluated the extent of environmental contamination in the ICU and correlated this with patient and disease factors, including the impact of different ventilatory modalities. Methods: In this observational study, surface environmental samples collected from ICU patient rooms and common areas were tested for SARS-CoV-2 by polymerase chain reaction (PCR). Select samples from the common area were tested by cell culture. Clinical data were collected and correlated to the presence of environmental contamination. Results were compared to historical data from a previous study in general wards. Results: In total, 200 samples from 20 patient rooms and 75 samples from common areas and the staff pantry were tested. The results showed that 14 rooms had at least 1 site contaminated, with an overall contamination rate of 14% (28 of 200 samples). Environmental contamination was not associated with day of illness, ventilatory mode, aerosol-generating procedures, or viral load. The frequency of environmental contamination was lower in the ICU than in general ward rooms. Eight samples from the common area were positive, though all were negative on cell culture. Conclusion: Environmental contamination in the ICU was lower than in the general wards. The use of mechanical ventilation or high-flow nasal oxygen was not associated with greater surface contamination, supporting their use and safety from an infection control perspective. Transmission risk via environmental surfaces in the ICUs is likely to be low. Nonetheless, infection control practices should be strictly reinforced, and transmission risk via droplet or airborne spread remains.


2019 ◽  
Vol 46 (1) ◽  
pp. 22-45 ◽  
Author(s):  
Marta Ramon

The Dublin Mechanics’ Institute (1824–1919), like others of its kind, was established with the declared purpose of providing technical education to the city’s working classes. While its educational objectives were at best partially achieved, the Institute made a significant contribution to the development of Dublin’s public sphere. Especially after 1848, when the Institute acquired the building that would later become the Abbey Theatre, its premises became a hybrid space where the lower middle and working classes could not only attend courses and lectures, but also receive political training on the managing board, organise their own public events at the lecture hall and negotiate relations with their ‘social betters’ in the common area of the reading room. This article looks at the Dublin Mechanics’ Institute through the different venues it occupied between 1824 and 1904, in order to examine the connection between the provision and regulation of physical space and the development of civic and political culture. It argues that the Institute, far from representing a history of failure, must be understood as a key piece in the incorporation of the lower middle and working classes to Irish civic life during the middle decades of the nineteenth century.


2015 ◽  
Vol 15 ◽  
pp. 253-260
Author(s):  
Красимира [Krasimira] Колева [Koleva]

The Bulgarian-Romanian language boundary: anthroponymical dataThe topic is Balkan anthroponymy. The area is the Lower Danube – the Bulgarian-Romanian language boundary. In this contact zone there is a distribution of family names, formed from urbonyms. They signal a specific regional belonging, and they show the link with the common area: the Danube river. We are referring to family names of the type: Vidinliev, Kalafatov, Beketov, Svishtovliev, Ruschukliev, Kalarashev, Tutrakanov, (meaning ‘from Vidin’, ‘from Calafat’, ‘from Bechet’, ‘from Svishtov’, ‘from Ruse’, ‘from Calarashi’, ‘from Tutrakan’). This phenomenon is widespread on both banks of the river. Bułgarsko-rumuńska granica językowa. Dane antroponimiczneArtykuł dotyczy bałkańskiej antroponimii w regionie dolnego Dunaju, stanowiącego bułgarsko-rumuńską granicę i jednocześnie strefę kontaktu. W tym regionie częste są nazwiska derywowane od nazw miejscowości. Sygnalizują one pochodzenie, wskazując jednocześnie na rodowód miejscowy, tj. z regionu naddunajskiego. Są to nazwiska takie jak: Vidinliev, Kalafatov, Beketov, Svištovliev, Rusčukliev, Kalarašev, Tutrakanov (oznaczające: 'z Vidinu, z Kalafatu, z Svištova, z Ruse, z Kalaraši, z Tutrakanu'). Zjawisko to występuje po obu stronach Dunaju.


1970 ◽  
pp. 165-176
Author(s):  
Renata Tomaszewska-Lipiec

The article signals the problems of a complex influence that professional work, one of the key values, has over one’s personal life. This issue seems to be the common area of scientific research for both pedagogy and sociology. Based on the EU27 as well as on Polish research results, a thesis has been formulated that professional work may nowadays be a threat to the functioning of the family.


Author(s):  
Cara Carmichael ◽  
Moncef Krarti

In owner-occupied facilities, it is easy to justify the incorporation of high-performance building features because commonly recognized hard and soft benefits (cost savings, productivity gains and improved occupant health, etc.) are directly recovered by the investment entity. Developers or owners of multi-tenant office buildings and retail developments, on the other hand, encounter both perceived and real barriers that often prevent the inclusion of high-performance, climactic responsive features in new or retrofit projects. Good design, proper lease formulations, market education and intelligent operation will help overcome these barriers and allow the benefits of high-performance buildings to be realized and shared amongst various stakeholders. To demonstrate this process, strategies were analyzed for a multi-tenant building in Glenwood Springs, Colorado. The Alpine Professional Building (APB) is a three-story, 18,537 gross square foot building that was originally built in 1950 and was remodeled in 1981. The building has fifteen tenants, ranging from 143 SF of leased space to an entire floor. The HVAC systems are in need of upgrading and little has been done to the building beyond typical maintenance to keep systems in operation. This is a fairly typical scenario across the industry, which enables this analysis to be widely applicable and adaptable. Building walkthroughs, surveys, utility bill analysis and energy analysis concluded that an upgrade was needed consisting of the following package of measures: improved occupant control (thought tenant education and digital thermostats), upgrading the light fixtures in the common areas and tenant spaces, and replacing the boiler. This package has a payback period under nine years would enable the building to achieve the ENERGY STAR label and can be profitable for both tenants and the landlord. The financial analysis evaluated four different methods of financing the upgrades so that both the tenant and landlord would benefit financially from the upgrades. The financial method recommended is the ‘CAM Adjustment method’ in which the landlord would provide the initial capital for the upgrades and recover those costs (plus interest) through adjustments to the Common Area Maintenance (CAM) fees. This method would have minimal tenant disruption and enable the landlord to bridge costs and savings across tenants during turnover. This paper also compares the four financing mechanisms and demonstrates their industry applicability through commonly applied energy conservation measures.


Author(s):  
Sven Groppe ◽  
Jinghua Groppe ◽  
Christoph Reinke ◽  
Nils Hoeller ◽  
Volker Linnemann

The widespread usage of XML in the last few years has resulted in the development of a number of XML query languages like XSLT or the later developed XQuery language. Today, there are many products like databases in the area of XML processing that support either XSLT or XQuery, but not both of them. This may prevent users from employing their favourite XML query language. In this chapter, the authors show that both languages have comparable expression power and present a scheme for translating XQuery to XSLT and vice versa. This translation scheme enables a user to employ either XSLT or XQuery for each product which supports one of these languages. They also summarize in this chapter both current and future trends and research issues and also consider those that might emerge in the common area of XSLT and XQuery and which are particular to XSLT.


ERA Forum ◽  
2020 ◽  
Vol 21 (3) ◽  
pp. 449-464
Author(s):  
Boudewijn de Jonge

AbstractMost forms of international cooperation in criminal matters have now been regulated to some extent by European Union legislation. One classical form of cooperation has been so far largely immune from influence by the EU legislator, however. This is the area of transfer of proceedings. This article provides an overview of the current situation and argues that new life should be blown into earlier initiatives to improve this form of cooperation. Harmonisation in this area will prove an important step to facilitate the proper administration of justice in the common Area of Freedom, Justice and Security that the European Union is set to realise.


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