35 research outputs found
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
A new census of alien weeds present in crops of oranie (Northwest Algeria) and a comparative study of their functional traits with native weeds
No full textThe alien crop weed flora of Oranie (Northwest Algeria) presented in this study which is based on fieldwork carried out by the first author up to September 2023, as well as on the literature found to date. The analysis of Oranie's weed flora showed 36 species of alien species which represent 2% of the 1,780 species of the whole spontaneous flora of the Oranian phytogeographic territory and 8% of the local weed flora. Almost 50% of these species were native to the American continent and about 63% came from several tropical regions. The most representative life-history traits of these alien species compared to native ones: were: annual cycle (75% versus 76%), summer germination (78% versus 13%), non-specialized dissemination strategies, but related with anthropic activities (75% versus 46%), self-pollination (73%), and the high proportion of C4 species (36.11% versus 3%). The agricultural biotopes mainly affected are summer-irrigated crops with short rotation and an important nitrogenous fertilizers assignment. There are very few such habitats in Oranie, and few summer annuals in Algeria's flora. The success of alien weeds seems to result from the suitability between environmental conditions of a newly created habitat (summer temperature, humidity, important nitrogen rate, frequent perturbations, short rotations, and ecological niches available) and species characteristics (annual type, summer germination, photosynthetic pathway in C4). Dispersal strategy and fecundation types seemed not to be of much importance in characterizing these alien species
A 3.3-GS/s 6-b Fully Dynamic Pipelined ADC With Linearized Dynamic Amplifier
No full textManuscript received April 27, 2021; revised June 29, 2021; accepted July 2, 2021. This article was approved by Associate Editor Jeffrey Gealow. This work was supported in part by the Science and Technology Development Fund, Macau, under Grant 0003/2019/AFJ and Grant SKL-AMSV (UM)-2020-2022; and in part by the Research Grants of the University of Macau under Grant MYRG2019-00021-AMSV. (Corresponding author: Chi-Hang Chan.
Inter-institutional scientific collaboration: an approach from social network
No full textThis paper presents a tool that can be used to characterize, analyze and interpret the
patterns of collaboration among institutions by means of the visual display of scientific
information. These graphic representations allow for a combined analysis of a given
institution in the system of relations (network), and of the particular attributes of that
institution (indicators). The tool affords the possibility of regenerating the network to
make any number of aggregates appear or disappear, thus allowing one to focus on
institutional sectors, geographic regions, etc. It also allows for analysis of sectorial
interaction, institutional backing of research, and the influence of geographic proximity,
linguistic affinity, or regional politics. This is indeed a versatile analytical tool, and it is
bound to prove its potential for evaluating patterns of collaborative research, development
and innovation
Biomedical scientific publication patterns in the Scopus database : a case study of Andalusia, Spain
No full textThis paper characterises scientific output in biomedicine in Andalusia, and Spain as a whole, and conduct a first-time comparison to Europe- and world-wide production. The data were extracted from the Scopus database. Three families of indicators are explored to analyse research quantity, quality and collaboration. The results show an upward trend on biomedical output in Andalusia. Over 50 % was in clinical medicine, whose growth doubled the basic medicine. We found greater than nationwide specialisation in biochemistry, genetics and molecular biology, immunology and microbiology, and pharmacology, while psychology proved to be the most prominent emerging area. The publication in most cited journals together with national and international collaboration enhanced research visibility. More citable papers were published on basic than clinical medicine, and the number of citations received by the former was also larger. The higher citation rate in basic medicine may also be explained by the bigger percentage of papers published in international instead domestic journals. Hence, publication patterns would appear to affect research visibility. The methodology proposed may provide guidance for public policy makers to improve, encourage and intensify good biomedical research practice
A Survey of Quality Engineering-ManagementJournals by Bibliometric Indicators
No full textThis paper analyses some of the most popular scientific journals in the Quality field from the point of view of three bibliometric indicators: the Hirsch (h) index for journals, the total number of citations and the h-spectrum. In particular, h-spectrum is a novel tool based on h, making it possible to (i) identify a reference profile of the typical authors of a journal; (ii) compare different journals; and (iii) provide a rough indication of their ‘bibliometric positioning' in the scientific community. Results of this analysis can be helpful for guiding potential authors and members of the scientific community in the Quality Engineering/Management area. A large amount of empirical data are presented and discusse
Toward microbial recycling and upcycling of plastics: prospects and challenges
No full textAnnually, 400 Mt of plastics are produced of which roughly 40% is discarded within a year. Current plastic waste management approaches focus on applying physical, thermal, and chemical treatments of plastic polymers. However, these methods have severe limitations leading to the loss of valuable materials and resources. Another major drawback is the rapid accumulation of plastics into the environment causing one of the biggest environmental threats of the twenty-first century. Therefore, to complement current plastic management approaches novel routes toward plastic degradation and upcycling need to be developed. Enzymatic degradation and conversion of plastics present a promising approach toward sustainable recycling of plastics and plastics building blocks. However, the quest for novel enzymes that efficiently operate in cost-effective, large-scale plastics degradation poses many challenges. To date, a wide range of experimental set-ups has been reported, in many cases lacking a detailed investigation of microbial species exhibiting plastics degrading properties as well as of their corresponding plastics degrading enzymes. The apparent lack of consistent approaches compromises the necessary discovery of a wide range of novel enzymes. In this review, we discuss prospects and possibilities for efficient enzymatic degradation, recycling, and upcycling of plastics, in correlation with their wide diversity and broad utilization. Current methods for the identification and optimization of plastics degrading enzymes are compared and discussed. We present a framework for a standardized workflow, allowing transparent discovery and optimization of novel enzymes for efficient and sustainable plastics degradation in the future.Microbial Biotechnolog
The multicultural society as a challenge and opportunity for the pastoral care of children and young people in the church. Contribution to the Youth Pastoral Study Days of the Episcopal Youth Office Trier, 24.2.2003 at the Marienburg Castle
No full textAngesichts der aktuellen Diskussionen um ein Zuwanderungsgesetz diskutiert der Autor Chancen und Probleme der Migrationsthematik für die kirchliche (katholische) Jugendarbeit. Dazu gehören die Fragen nach der "Integration" im kirchlichen Verständnis und der "nationalen Identität" in katholischer Perspektive sowie ein Blick auf den interkulturellen Lernprozess in Begegnungen und die Entwicklung der persönlichen Identität. (Autor)In view of the current discussions about an immigration law, the author discusses opportunities and problems of the migration issue for church (Catholic) youth work. This includes the questions of "integration" in the church\u27s understanding and "national identity" in a Catholic perspective as well as a look at the intercultural learning process in encounters and the development of personal identity. (Author
A method to identify trace sulfated IgG N-glycans as biomarkers for rheumatoid arthritis
No full textN-linked glycans on immunoglobulin G (IgG) have been associated with pathogenesis of diseases and the therapeutic functions of antibody-based drugs; however, low-abundance species are difficult to detect. Here we show a glycomic approach to detect these species on human IgGs using a specialized microfluidic chip. We discover 20 sulfated and 4 acetylated N-glycans on IgGs. Using multiple reaction monitoring method, we precisely quantify these previously undetected low-abundance, trace and even ultra-trace N-glycans. From 277 patients with rheumatoid arthritis (RA) and 141 healthy individuals, we also identify N-glycan biomarkers for the classification of both rheumatoid factor (RF)-positive and negative RA patients, as well as anti-citrullinated protein antibodies (ACPA)-positive and negative RA patients. This approach may identify N-glycosylation-associated biomarkers for other autoimmune and infectious diseases and lead to the exploration of promising glycoforms for antibody therapeutics.Macao Science and Technology Development Fund [020/2013/A1, 023/2016/AFJ]SCI(E)ARTICLE
Carbohydrate utilization and metabolism is highly differentiated in Agaricus bisporus
No full textBackground: Agaricus bisporus is commercially grown on compost, in which the available carbon sources consist mainly of plant-derived polysaccharides that are built out of various different constituent monosaccharides. The major constituent monosaccharides of these polysaccharides are glucose, xylose, and arabinose, while smaller amounts of galactose, glucuronic acid, rhamnose and mannose are also present.
Results: In this study, genes encoding putative enzymes from carbon metabolism were identified and their expression was studied in different growth stages of A. bisporus. We correlated the expression of genes encoding plant and fungal polysaccharide modifying enzymes identified in the A. bisporus genome to the soluble carbohydrates and the composition of mycelium grown compost, casing layer and fruiting bodies.
Conclusions: The compost grown vegetative mycelium of A. bisporus consumes a wide variety of monosaccharides. However, in fruiting bodies only hexose catabolism occurs, and no accumulation of other sugars was observed. This suggests that only hexoses or their conversion products are transported from the vegetative mycelium to the fruiting body, while the other sugars likely provide energy for growth and maintenance of the vegetative mycelium. Clear correlations were found between expression of the genes and composition of carbohydrates. Genes encoding plant cell wall polysaccharide degrading enzymes were mainly expressed in compost-grown mycelium, and largely absent in fruiting bodies. In contrast, genes encoding fungal cell wall polysaccharide modifying enzymes were expressed in both fruiting bodies and vegetative mycelium, but different gene sets were expressed in these samples
