A Novel Edge Detection Algorithm for Mobile Robot Path Planning

A novel detection algorithm for vision systems has been proposed based on combined fuzzy image processing and bacterial algorithm. This combination aims to increase the detection efficiency and reduce the computational time. In addition, the proposed algorithm has been tested through real-time robot navigation system, where it has been applied to detect the robot and obstacles in unstructured environment and generate 2D maps. These maps contain the starting and destination points in addition to current positions of the robot and obstacles. Moreover, the genetic algorithm (GA) has been modified and applied to produce time-based trajectory for the optimal path. It is based on proposing and enhancing the searching ability of the robot to move towards the optimal path solution. Many scenarios have been adopted in indoor environment to verify the capability of the new algorithm in terms of detection efficiency and computational time

Ab Initio Theory of Light-ion Reactions

The exact treatment of nuclei starting from the constituent nucleons and the fundamental interactions among them has been a long-standing goal in nuclear physics. Above all nuclear scattering and reactions, which require the solution of the many-body quantum-mechanical problem in the continuum, represent a theoretical and computational challenge for ab initio approaches. After a brief overview of the field, we present a new ab initio many-body approach capable of describing simultaneously both bound and scattering states in light nuclei. By combining the resonating-group method with the ab initio no-core shell model, we complement a microscopic cluster technique with the use of realistic interactions and a microscopic and consistent description of the clusters. We show results for neutron and proton scattering on light nuclei, including p-7Be and n-8He. We also highlight the first results of the d-3He and d-3H fusion calculations obtained within this approach.Comment: To appear in the proceedings of the International Nuclear Physics Conference INPC 2010, Vancouver, Canada, July 4 - 9, 2010, 10 pages, 5 figure

The long non-coding RNA HOTAIRM1 promotes tumor aggressiveness and radiotherapy resistance in glioblastoma

Glioblastoma is the most common malignant primary brain tumor. To date, clinically relevant biomarkers are restricted to isocitrate dehydrogenase (IDH) gene 1 or 2 mutations and O6-methylguanine DNA methyltransferase (MGMT) promoter methylation. Long non-coding RNAs (lncRNAs) have been shown to contribute to glioblastoma pathogenesis and could potentially serve as novel biomarkers. The clinical significance of HOXA Transcript Antisense RNA, Myeloid-Specific 1 (HOTAIRM1) was determined by analyzing HOTAIRM1 in multiple glioblastoma gene expression data sets for associations with prognosis, as well as, IDH mutation and MGMT promoter methylation status. Finally, the role of HOTAIRM1 in glioblastoma biology and radiotherapy resistance was characterized in vitro and in vivo. We identified HOTAIRM1 as a candidate lncRNA whose up-regulation is significantly associated with shorter survival of glioblastoma patients, independent from IDH mutation and MGMT promoter methylation. Glioblastoma cell line models uniformly showed reduced cell viability, decreased invasive growth and diminished colony formation capacity upon HOTAIRM1 down-regulation. Integrated proteogenomic analyses revealed impaired mitochondrial function and determination of reactive oxygen species (ROS) levels confirmed increased ROS levels upon HOTAIRM1 knock-down. HOTAIRM1 knock-down decreased expression of transglutaminase 2 (TGM2), a candidate protein implicated in mitochondrial function, and knock-down of TGM2 mimicked the phenotype of HOTAIRM1 down-regulation in glioblastoma cells. Moreover, HOTAIRM1 modulates radiosensitivity of glioblastoma cells both in vitro and in vivo. Our data support a role for HOTAIRM1 as a driver of biological aggressiveness, radioresistance and poor outcome in glioblastoma. Targeting HOTAIRM1 may be a promising new therapeutic approach

On high-speed turning of a third-generation gamma titanium aluminide

Gamma titanium aluminides are heat-resistant intermetallic alloys predestined to be employed in components suffering from high mechanical stresses and thermal loads. These materials are regarded as difficult to cut, so this makes process adaptation essential in order to obtain high-quality and defect-free surfaces suitable for aerospace and automotive parts. In this paper, an innovative approach for longitudinal external high-speed turning of a third-generation Ti-45Al-8Nb- 0.2C-0.2B gamma titanium aluminide is presented. The experimental campaign has been executed with different process parameters, tool geometries and lubrication conditions. The results are discussed in terms of surface roughness/integrity, chip morphology, cutting forces and tool wear. Experimental evidence showed that, due to the high cutting speed, the high temperatures reached in the shear zone improve chip formation, so a crack-free surface can be obtained. Furthermore, the use of a cryogenic lubrication system has been identified in order to reduce the huge tool wear, which represents the main drawback when machining gamma titanium aluminides under the chosen process condition

Hyper-N-glycosylated SAMD14 and neurabin-I as driver autoantigens of primary central nervous system lymphoma

To address the role of chronic antigenic stimulation in primary central nervous system lymphoma (PCNSL), we searched for autoantigens and identified sterile α-motif domain containing protein 14 (SAMD14) and neural tissue-specific F-actin binding protein I (neurabin-I) as autoantigenic targets of the B-cell receptors (BCRs) from 8/12 PCNSLs. In the respective cases, SAMD14 and neurabin-I were atypically hyper--glycosylated (SAMD14 at ASN339 and neurabin-I at ASN1277), explaining their autoimmunogenicity. SAMD14 and neurabin-I induced BCR pathway activation and proliferation of aggressive lymphoma cell lines transfected with SAMD14- and neurabin-I-reactive BCRs. Moreover, the BCR binding epitope of neurabin-I conjugated to truncated exotoxin-killed lymphoma cells expressing the respective BCRs. These results support the role of chronic antigenic stimulation by posttranslationally modified central nervous system (CNS) driver autoantigens in the pathogenesis of PCNSL, serve as an explanation for their CNS tropism, and provide the basis for a novel specific treatment approach

Western ideals and global realities–physiotherapists’ views on factors that play a role in ethical decision-making: an international qualitative analysis

Data availability statement: The data that support the findings of this study are available on reasonable request from the corresponding author, AS. The data are not publicly available due to ethical restrictions to protect the research participants who provided sensitive information.Supplemental material is available online at: https://www.tandfonline.com/doi/full/10.1080/21679169.2022.2155240#supplemental-material-section .Background: There is a lack of knowledge about factors that play a role in ethical decision-making of physiotherapists internationally. The purpose of this study was to explore, describe and map factors in ethical decision-making of physiotherapists from around the globe. Methods: A descriptive research design and constructivist research paradigm was applied. Elements of both a coding reliability thematic analysis and a reflexive thematic analysis method were used deductively and inductively to analyse the content of responses to an optional open question in an internationally distributed online survey with 559 participants from 72 countries through several steps and cycles. Results: A spectrum of 43 factors was identified within 200 individual responses, allocated to five themes: individual factors (19 factors); relational factors (6 factors); organisational factors (6 factors); situational factors (6 factors); and societal factors (6 factors). The importance of context on organisational, situational and societal levels, interrelatedness of physiotherapists, individual characteristics and situatedness of patients/clients and physiotherapists, as well as aspects and features of the patient/client-physiotherapist relationship became apparent throughout analysis. Conclusions: To meet the emerging requirements for ethical physiotherapy practice, we advocate that both physiotherapy students and practicing physiotherapists internationally need to be trained as moral agents in integrated manners. Based on the results of this study we conclude that such training should embrace professionalism, professional values, ethical codes, ethical theories and ethical decision-making frameworks that acknowledge interrelatedness, epistemology and situatedness, self-reflective and communicative techniques, critical thinking, social/societal determinants of health, social responsibility, cultural competence and self-care techniques.This work was supported by the Department for Culture and Science of the Salzburg Government (Land Salzburg), Austria, under Grant number 20204-WISS/225/80-2018 (survey distribution) and 20204-WISS/225/193-2019 (open access publishing)

Views of physiotherapists on factors that play a role in ethical decision-making: an international online survey study

Availability of data and materials: The data that support the findings of this study are available on reasonable request from the corresponding author. The data are not publicly available due to ethical restrictions to protect the research participants who provided sensitive information.Supplementary Information: Additional file 1: Appendix 1. List of survey-items with underpinning or embedded factors in ethical decision-making including literature informing survey development. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9889242/bin/40945_2022_157_MOESM1_ESM.docx (23K) GUID: FA7F265B-87C8-45E3-824D-D8C69B94EE21 Additional file 2: Appendix 2. Drop-out analysis by gender, age, nationality (geographic/WP region), and religion. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9889242/bin/40945_2022_157_MOESM2_ESM.docx (17K) GUID: 35DC772B-739E-4799-8AE2-2E50FABF3767 .Archives of Physiotherapy is now published by AboutScience Sr. on behalf of Società Italiana di Fisioterapia. Authors contributing to Archives of Physiotherapy agree to publish their articles under the CC-BY-NC 4.0 license, which allows third parties to re-use the work without permission as long as the work is properly referenced and the use is non-commercial.Background: There is a lack of knowledge about the ways physiotherapists around the world learn about professional code of ethics and ethical decision-making frameworks. The profession has a gap in the understanding about physiotherapists’ views on factors that play a role in ethical decision-making and whether these views differ between World Physiotherapy regions. Methods: An online survey study in English was conducted from October 2018 to October 2019. Participants included 559 physiotherapists located in 72 countries. The self-designed survey questionnaire contained 13 items asking about demographic information and means of learning about ethical codes and decision-making frameworks. A further 30 items were presented which included statements underpinned with individual, organisational, situational and societal factors influencing ethical decision-making. Participants were asked to express their level of agreement or disagreement using a 5-point-Likert-scale. Results: Participants’ highest rated responses endorsed that the professional role of physiotherapists is linked to social expectations of ethical behaviour and that ethical decision-making requires more skills than simply following a code of ethics. A recognisable organisational ethical culture was rated as supporting good ethical decisions. Comparing responses by World Physiotherapy regions showed significant differences in factors such as culture, religion, emotions, organisational values, significant others, consequences of professional misconduct and professional obligations. Entry level education was not perceived to provide a solid base for ethical decision-making in every World Physiotherapy region. Participants reported multiple sources for learning about a professional code of ethics and ethical decision-making frameworks. What’s more, the number of sources differed between World Physiotherapy regions. Conclusions: Multiple factors play a role in physiotherapists’ ethical decision-making internationally. Physiotherapists’ ethical knowledge is informed by, and acquired from, several learning sources, which differ in both quality and quantity amongst World Physiotherapy regions. Easily accessible knowledge and education about professional codes of ethics and ethical decision-making can foster continuing professional development for physiotherapists. The establishment of constructive ethical cultures in workplaces can improve ethical decision-making, and should acknowledge the influence of individual, organisational, situational and societal factors. The establishment of collaborative learning environments can support knowledge translation which acknowledges practice-based methods of knowing and learning.This work was supported by the Department for Culture and Science of the Salzburg Government (Land Salzburg), Austria, under Grant number 20204-WISS/225/80-2018 (survey distribution)

Turbulent flow at 190 m height above London during 2006-2008: A climatology and the applicability of similarity theory

Flow and turbulence above urban terrain is more complex than above rural terrain, due to the different momentum and heat transfer characteristics that are affected by the presence of buildings (e.g. pressure variations around buildings). The applicability of similarity theory (as developed over rural terrain) is tested using observations of flow from a sonic anemometer located at 190.3 m height in London, U.K. using about 6500 h of data. Turbulence statistics—dimensionless wind speed and temperature, standard deviations and correlation coefficients for momentum and heat transfer—were analysed in three ways. First, turbulence statistics were plotted as a function only of a local stability parameter z/Λ (where Λ is the local Obukhov length and z is the height above ground); the σ_i/u_* values (i = u, v, w) for neutral conditions are 2.3, 1.85 and 1.35 respectively, similar to canonical values. Second, analysis of urban mixed-layer formulations during daytime convective conditions over London was undertaken, showing that atmospheric turbulence at high altitude over large cities might not behave dissimilarly from that over rural terrain. Third, correlation coefficients for heat and momentum were analyzed with respect to local stability. The results give confidence in using the framework of local similarity for turbulence measured over London, and perhaps other cities. However, the following caveats for our data are worth noting: (i) the terrain is reasonably flat, (ii) building heights vary little over a large area, and (iii) the sensor height is above the mean roughness sublayer depth

Effectiveness of postoperative radiotherapy after radical cystectomy for locally advanced bladder cancer

BACKGROUND: Local-regional failure (LF) for locally advanced bladder cancer (LABC) after radical cystectomy (RC) is common even with chemotherapy and is associated with high morbidity/mortality. Postoperative radiotherapy (PORT) can reduce LF and may enhance overall survival (OS) but has no defined role. We hypothesized that the addition of PORT would improve OS in LABC in a large nationwide oncology database. METHODS: We identified ≥ pT3pN0-3M0 LABC patients in the National Cancer Database diagnosed 2004-2014 who underwent RC ± PORT. OS was calculated using Kaplan-Meier and Cox proportional hazards regression modeling was used to identify predictors of OS. Propensity matching was performed to match RC patients who received PORT vs those who did not. RESULTS: 15,124 RC patients were identified with 512 (3.3%) receiving PORT. Median OS was 20.0 months (95% CI, 18.2-21.8) for PORT vs 20.8 months (95% CI, 20.3-21.3) for no PORT (P = 0.178). In multivariable analysis, PORT was independently associated with improved OS: hazard ratio 0.87 (95% CI, 0.78-0.97); P = 0.008. A one-to-three propensity match yielded 1,858 patients (24.9% receiving PORT and 75.1% without). In the propensity-matched cohort, median OS was 19.8 months (95% CI, 18.0-21.6) for PORT vs 16.9 months (95% CI, 15.6-18.1) for no PORT (P = 0.030). In the propensity-matched cohort of urothelial carcinoma patients (N = 1,460), PORT was associated with improved OS for pT4, pN+, and positive margins (P \u3c 0.01 all). CONCLUSION: In this observational cohort, PORT was associated with improved OS in LABC. While the data should be interpreted cautiously, these results lend support to the use of PORT in selected patients with LABC, regardless of histology. Prospective trials of PORT are warranted

Global burden of human brucellosis : a systematic review of disease frequency

BACKGROUND: This report presents a systematic review of scientific literature published between 1990-2010 relating to the frequency of human brucellosis, commissioned by WHO. The objectives were to identify high quality disease incidence data to complement existing knowledge of the global disease burden and, ultimately, to contribute towards the calculation of a Disability-Adjusted Life Years (DALY) estimate for brucellosis.METHODS/PRINCIPAL FINDINGS: Thirty three databases were searched, identifying 2,385 articles relating to human brucellosis. Based on strict screening criteria, 60 studies were selected for quality assessment, of which only 29 were of sufficient quality for data analysis. Data were only available from 15 countries in the regions of Northern Africa and Middle East, Western Europe, Central and South America, Sub-Saharan Africa, and Central Asia. Half of the studies presented incidence data, six of which were longitudinal prospective studies, and half presented seroprevalence data which were converted to incidence rates. Brucellosis incidence varied widely between, and within, countries. Although study biases cannot be ruled out, demographic, occupational, and socioeconomic factors likely play a role. Aggregated data at national or regional levels do not capture these complexities of disease dynamics and, consequently, at-risk populations or areas may be overlooked. In many brucellosis-endemic countries, health systems are weak and passively-acquired official data underestimate the true disease burden.CONCLUSIONS: High quality research is essential for an accurate assessment of disease burden, particularly in Eastern Europe, the Asia-Pacific, Central and South America and Africa where data are lacking. Providing formal epidemiological and statistical training to researchers is essential for improving study quality. An integrated approach to disease surveillance involving both human health and veterinary services would allow a better understand of disease dynamics at the animal-human interface, as well as a more cost-effective utilisation of resources