176 research outputs found
Synthesis and Photophysical Study of New Green Fluorescent TPA Based Poly(azomethine)s
No full textA series of poly(azomethine)s (PAMs) were synthesized from N-1-(4-aminophenyl)-N-1-(4-phenoxyphenyl)benzene-1,4-diamine (DA) and various dialdehydes to investigate the influence of structure of polymer chain and triphenylamine-based phenoxy pendant group on the optoelectronic properties. The structural characterization of the resulting poly(azomethine)s was carried out by solubility test, gel permeation chromatography, viscosity measurement, fourier transform infrared (FTIR) spectral and CHN elemental analysis. The photophysical and electrochemical properties of the materials were scrutinized by UV-vis, photoluminescence, time correlation photon counting spectral analysis (TCSP) and cyclic voltammetry. The thermal stability of the poly(azomethine)s was assessed by differential scanning calorimetry and thermogravimetric analysis found to be stable upto 300 degrees C. These polymers exhibit moderate inherent viscosity range from 0.99 to 1.15 g dL(- 1) and appreciable organosolubility. The presence of triphenylamine and azomethine (CH = N) linkage in our synthesized materials rendered them fluorescent, emitting green light upon excitation at 375 nm with quantum efficiencies of 3.9-8.5%. The pendant phenoxy group at para-position in new poly(azomethine)s has also lowered the onset oxidation potentials and elevated the HOMO levels. Additionally, the presence of conjugation increases the fluorescence time of the excited state in conjugated polymers which was found in the range 9.22-11.17 ns, sufficient to be use in future optoelectronic applications.
Corrigendum to "Investigations into structure-property relationships of novel Ru(II) dyes with N,N'-Diethyl group in ancillary ligand for dye-sensitized solar cells" [Dyes Pigments 171(2019) 107754-107762](S0143720819314639)(10.1016/j.dyepig.2019.107754)
No full textThe authors regret the typos in the author names and affiliations. The authors would like to apologize for any inconvenience caused. Correction: The correct author names and affiliations should read as follows: Saba Ashrafa,b,d, Rui Sud, Javeed Akhtarc, Humaira M. Siddiqib, Ahmed Shujae, Khalid Al-Saadf, Siham Y. Al-Qaradawif, Ahmed El-Shafeid*[email protected] aSulaiman Bin Abdullah Aba Al-Khail - Centre for Interdisciplinary Research in Basic Science (SA-CIRBS), International Islamic University, Sector H-10, Islamabad, Pakistan bDepartment of Chemistry, Quaid-I-Azam University, Islamabad, 45320, Pakistan cMaterials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, 10250, AK, Pakistan dPolymer and Color Chemistry Program & Fiber and Polymer Science Program, North Carolina State University, Raleigh, NC, 27606, USA eCentre for Advanced Electronics and Photovoltaic Engineering (CAEPE), International Islamic University, Sector H-10, Islamabad, Pakistan fDepartment of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, P.O. Box 2713, Doha, QatarScopu
Robust S-scheme ZnO-TiO2-Ag with efficient charge separations for highly active hydrogen evolution performance and photocatalytic mechanism insight
No full textThe design and fabrication of photocatalysts for robust H2 evolution from photocatalytic water splitting has emerged as a hotspot in the domain of photocatalysis. Therefore, we have designed an S-scheme ZnO-TiO2-Ag (Zn-Ti-Ag) catalyst through the hydrothermal process to investigate photocatalytic H2 production under simulated sunlight exposure. The H2 production efficiency of Zn-Ti-Ag catalyst from water/formic acid solution is 60.4 mmolh−1g−1, which is exceptionally greater than that of pure ZnO (0.39 mmolh−1g−1) under identical experimental conditions. After five successive cycles, no obvious decline of photocatalytic activity over Zn-Ti-Ag verifies its outstanding stability for large-scale application. The exceptionally enhanced photocatalytic performance of Zn-Ti-Ag heterojunction can be attributed to efficient photocarriers separation and transport efficiency, improved light absorption resulting from the LSPR effect of Ag, and powerful redox potentials due to the construction of S-scheme. This research provides an efficient orientation to understand and design LSPR phenomenon-assisted oxides-based S-scheme heterojunctions for diverse photocatalytic applications
PROPOSED PRODUCT STRATEGY BASED ON CONSUMER PREFERENCE FOR FASHION HIJAB BRAND (CASE STUDY: HUMAIRA LABEL)
No full textMuslim fashion industry has emerged to develop in Indonesia and considerable potential to become the center of the world's Muslim fashion according to Muslim fashion consumption estimated at US $20 billion with growth rate of 18.2 % per year in Indonesia (Global Islamic Report, 2018/2019). Humaira Label is a local brand of self manufactured Scarf and Woman Muslim Wear that aims to create modest, smart casual, exclusivity and unique scarf design with premium quality based on Bandung, established in August 2018. The raw material of Humaira Label built by natural fabrics, such as lyocell, cotton voile, miracle voile and ultrafine voile with various of beautiful unique design. The motif/design of scarves is exclusive because Humaira Label changes the design dynamically every batch. Its inspired by the lifestyle of dynamic and active working women in style - smart casual.This research aims to propose product strategy based on consumer preference by determining the cause of instability income of Humaira Label which is indicated by no sales indicate in several months by using internal and external factors analysis to find the root problems using STP, Marketing Mix Analysis, Porters Five and PEST Analysis, customer analysis and benchmark analysis and then been concluded in SWOT analysis and TOWS matrix. To know the customer preference toward hijab product, conducted the questionnaire by 103 respondents by analyzing the descriptive analysis and conjoint analysis.From matrix TOWS analysis, author proposed several alternative product strategies that can be implemented by Humaira Label. Those alternatives product strategy based on consumer preference that had been chosen to be proposed are making variance of product, improving promotion placement in social media, empowering local brand by creating brand value, reseller and drop shipper program, collaborate with social influencer in media social, and develop customer engagement program.Keywords:Muslim Fashion industry, Hijab, Product Strategy, Consumer Preference, TOWS matri
PROPOSED PRODUCT STRATEGY BASED ON CONSUMER PREFERENCE FOR FASHION HIJAB BRAND (CASE STUDY: HUMAIRA LABEL)
No full textMuslim fashion industry has emerged to develop in Indonesia and considerable potential to become the center of the world's Muslim fashion according to Muslim fashion consumption estimated at US $20 billion with growth rate of 18.2 % per year in Indonesia (Global Islamic Report, 2018/2019). Humaira Label is a local brand of self manufactured Scarf and Woman Muslim Wear that aims to create modest, smart casual, exclusivity and unique scarf design with premium quality based on Bandung, established in August 2018. The raw material of Humaira Label built by natural fabrics, such as lyocell, cotton voile, miracle voile and ultrafine voile with various of beautiful unique design. The motif/design of scarves is exclusive because Humaira Label changes the design dynamically every batch. Its inspired by the lifestyle of dynamic and active working women in style - smart casual.This research aims to propose product strategy based on consumer preference by determining the cause of instability income of Humaira Label which is indicated by no sales indicate in several months by using internal and external factors analysis to find the root problems using STP, Marketing Mix Analysis, Porters Five and PEST Analysis, customer analysis and benchmark analysis and then been concluded in SWOT analysis and TOWS matrix. To know the customer preference toward hijab product, conducted the questionnaire by 103 respondents by analyzing the descriptive analysis and conjoint analysis.From matrix TOWS analysis, author proposed several alternative product strategies that can be implemented by Humaira Label. Those alternatives product strategy based on consumer preference that had been chosen to be proposed are making variance of product, improving promotion placement in social media, empowering local brand by creating brand value, reseller and drop shipper program, collaborate with social influencer in media social, and develop customer engagement program.Keywords:Muslim Fashion industry, Hijab, Product Strategy, Consumer Preference, TOWS matri
Prevalence of underweight in people with severe mental illness: systematic review and meta-analysis
No full textIntroduction: people with severe mental illness (SMI) have a higher prevalence of obesity as compared with the general population, however there is mixed evidence about the prevalence of underweight. Thus, the aim of this study is to determine the pooled prevalence of underweight in people with SMI and its association with socio-demographic factors; and to compare the prevalence of underweight between SMI and the general population.Methods: MEDLINE, PsycINFO, and EMBASE databases were searched to identify observational studies assessing the prevalence of underweight in adults with SMI (schizophrenia, major depressive disorder with psychotic features, and bipolar disorders). Screening, data extraction and risk of bias assessments were performed independently by two co-authors, with disagreements resolved by consensus. Random effect estimates for the pooled prevalence of underweight and the pooled odds of underweight in people with SMI compared with the general population were calculated. Subgroup analyses were conducted for type of SMI, setting, antipsychotic medication, region of the world, World Bank country income classification, data collection and sex. Result: 40 estimates from 22 countries were included. The pooled prevalence of underweight in people with SMI was 3.8% (95% C.I. = 2.9-5.0). People with SMI were less likely to be underweight than the general population (OR 0.65; 95% C.I. = 0.4-1.0). The pooled prevalence of underweight in SMI in South Asia was 7.5% (95%C.I. = 5.8-14.1) followed by Europe and Central Asia at 5.2% (95%C.I. = 3.2-8.1) and North America at 1.8% (95%C.I. = 1.2-2.6). Conclusion: people with SMI have lower odds of being underweight compared to the general population. People with schizophrenia had the highest prevalence of underweight compared to other types of SMI. Japan and South Asia have the highest prevalence of underweight in people with SMI. <br/
Traffic Sign and Light Detection using Deep learning for Automotive Applications
No full textTraffic sign and light detection are core components of Advanced Driver Assistance Systems (ADAS) and self-driving vehicles. The automotive industry is widely employing numerous approaches for automation through computer vision techniques. Object detection algorithms based on deep learning can be divided into two main categories, two stage and single stage detection algorithms. Two stage algorithms are designed to improve detection accuracy. While single stage algorithms are constructed to be faster, this increases their suitability for real time applications. This thesis presents a lightweight traffic sign and light detector by adapting a single stage, Single Shot Multibox Detection (SSD) algorithm by providing both high accuracy and real time detection capability. Therefore, the Visual geometry group (VGG16) base network in original SSD is replaced by MobileNet, that expertly manages detection speed and network size because of its lighter architecture. It is essential for the application domain to be able to detect small objects which is what the original SSD struggles with. For autonomous driving the detection results with respect to the distance of an object is of particular interest. A comfortable braking distance is needed in case of traffic signs and lights. That requires object detection from a farther distance, but farther distance makes the object to be detected appear smaller. Thus, this work further optimizes the number of feature map layers of the algorithm for the detection of small objects along with a better trade off between accuracy and detection time. Experimental results confirm the effectiveness of the proposed model as compared to the standard SSD with VGG16 and SSD with MobileNet V2
Lexical Analysis of English Borrowings in Balochi Text ‘Trangani Bunzeh’ By Saba Dashtiari
No full textThe goal of the research, "Lexical Analysis of English Borrowings in Balochi Language," was to close the theoretical divide between English borrowing and linguistic contact in Pakistan's regional languages. The purposes and varieties of English borrowings in the Balochi language. The nature of the investigation was qualitative. In order to examine English borrowings in the text, sixteen short stories by a well-known Balochi author Saba Dashtyari were purposefully chosen as a sample. Students at the BS level are taught the short tales chosen for analysis as part of the Balochi course curriculum. Thematic analysis was used to examine the texts. After the chosen publications were analyzed, over 65 instances of borrowed English terminology were found. It was discovered that the bulk of the imported terms (20%) had Balochi counterparts. Merely 80% of the terms were found to have no counterpart in the Balochi language. The study's conclusions also made clear that borrowed terms were accepted in a variety of real-world contexts, such as politics, sports, education, science and technology, and medical. This suggests that English has had a significant effect on Balochi language and literature. The study's conclusions have consequences for educators and legislators who create the Balochi courses that are taught at the college and university levels. The research came to the conclusion that by describing how borrowing might impact local languages, authors, students, and speakers of those languages can all learn about various facets of borrowing
A Comparison of Conjunctive Cohesion between Pakistani and British English Newspapers’ Opinion Articles
No full textPakistani English has been forming and developing norms different from standard British/American English. This study explores the use and patterns of conjunctive cohesion, as elaborated and categorized by Halliday and Hasan (1976) and revised by Halliday and Matthiessen (2013) in Pakistani and British Newspapers’ Opinion Articles from November 2023. Twenty-eight opinion articles from the Pakistani English newspaper ‘The Express Tribune (TET)’ and 25 from the British English newspaper ‘The Guardian (TG)’ were collected and saved into two separate text files for analysis. Frequencies of 80 conjunctions (which are categorized into three categories: elaboration, extension, and enhancement; and further into nine subcategories) were calculated by Anthony’s (2023) AntConc software (version 4.2.4). Pakistani data showed a higher frequency of Extending Conjunctions than British data. However, the use of both elaborating and enhancing conjunctions is higher in British writing than in Pakistani writing. The study revealed extending conjunctions (‘and,’ ‘but,’ ‘or’ being the top 3 in both data) as the most used items by Pakistani and British writers; results also suggested excessive use of ‘and’ among Pakistani writers. Yet when it comes to complex conjunction items, the cohesive choices of both Pakistani and native English writers show differences
Prevalence of overweight and obesity in people with severe mental illness:systematic review and meta-analysis
No full textAims: 1) To determine the pooled prevalence of overweight and obesity in people with severe mental illness (SMI), overall and by type of SMI, geographical region, and year of data collection; and 2) to assess the likelihood of overweight and obesity, in people with SMI compared with the general population. Methods: PubMed, Medline, EMBASE, and PsycINFO databases were searched to identify observational studies assessing the prevalence of obesity in adults with SMI. Screening, data extraction and risk of bias assessments were performed independently by two co-authors. Random effect estimates for the pooled prevalence of overweight and obesity and the pooled odds of obesity in people with SMI compared with the general population were calculated. Subgroup analyses were conducted for types of SMI, setting, antipsychotic medication, region of the world, country income classification, date of data collection and sex. We assessed publication bias and performed a series of sensitivity analyses, excluding studies with high risk of bias, with low sample size and those not reporting obesity according to WHO classification. Result: 120 studies from 43 countries were included, the majority were from high income countries. The pooled prevalence of obesity in people with SMI was 25.9% (95% C.I. = 23.3-29.1) and the combined pooled prevalence of overweight and obesity was 60.1% (95% C.I. = 55.8-63.1). Sub-Saharan Africa (13.0%, 95%C.I. = 6.7-25.1) and South Asia (17.7%, 95%C.I. = 10.5-28.5) had the lowest prevalence of obesity whilst North Africa and the Middle East (35.8%, 95%C.I. = 23.8-44.8) reported the highest prevalence. People with SMI were 3.04 more likely (95% C.I. = 2.42-3.82) to have obesity than the general population, but there was no difference in the prevalence of overweight. Women with schizophrenia were 1.44 (95% C.I. = 1.25-1.67) times more likely than men with schizophrenia to live with obesity; however, no gender differences were found among those with bipolar disorder. Conclusion: People with SMI have a markedly high prevalence and higher odds of obesity than the general population. This may contribute to the very high prevalence of physical health conditions and mortality in this group. People with SMI around the world would likely benefit from interventions to reduce and prevent obesity
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