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Wyświetlanie 1-10 z 34
Tytuł:
Frequency Dependent Incidence Model for Acute and Chronic Schistosomiasis
Autorzy:
Derick, Ngobi
Onuorah, Martins O.
Powiązania:
https://bibliotekanauki.pl/articles/1077429.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Schistosomiasis
acute
chronic
endemic
equilibrium
stability
Opis:
In this research work, a deterministic mathematical model for schistosomiasis transmission dynamics is presented. The model consists of five non-liniar ordinary differential equations incorporating the acute and chronic infectious compartments. The basic reproductive number, (the number of secondary infections when a single infectious individual is introduced into a population where everyone is susceptible) was obtained. Furthermore, we gained and analyzed for stability, the disease-free and endemic equilibrium. The qualitative feature of the model shows that the long-term behavior of the model is independent of initial conditions. Numerical simulation of the various state variables were obtained using matlab software.
Źródło:
World News of Natural Sciences; 2019, 23; 276-296
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Faster R-CNN Algorithm in the Internet of Things to Detect Mask Wearing: The Endemic Preparations
Autorzy:
Nasution, Marah Doly
Al-Khowarizmi
Rahmat, Romi Fadillah
Lubis, Arif Ridho
Lubis, Muharman
Powiązania:
https://bibliotekanauki.pl/articles/27311978.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Faster R-CNN
IoT
mask
endemic
Opis:
Faster R-CNN is an algorithm development that continuously starts from CNN then R-CNN and Faster R-CNN. The development of the algorithm is needed to test whether the heuristic algorithm has optimal provisions. Broadly speaking, faster R-CNN is included in algorithms that are able to solve neural network and machine learning problems to detect a moving object. One of the moving objects in the current phenomenon is the use of masks. Where various countries in the world have issued endemic orations after the Covid 19 pandemic occurred. Detection tool has been prepared that has been tested at the mandatory mask door, namely for mask users. In this paper, the role of the Faster R-CNN algorithm has been carried out to detect masks poured on Internet of Thinks (IoT) devices to automatically open doors for standard mask users. From the results received that testing on the detection of moving mask objects when used reaches 100% optimal at a distance of 0.5 to 1 meter and 95% at a distance of 1.5 to 2 meters so that the process of sending detection signals to IoT devices can be carried out at a distance of 1 meter at the position mask users to automatic doors.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 4; 691--696
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie terminu „epidemia” w starożytnej literaturze grecko-rzymskiej (Próba analizy na wybranych przykładach)
The meaning of the term epidemic in ancient greek and roman literature. An attempt at an analysis of chosen examples
Autorzy:
Iwańska, Judyta
Powiązania:
https://bibliotekanauki.pl/articles/496176.pdf
Data publikacji:
2014-11-30
Wydawca:
Towarzystwo Naukowe Franciszka Salezego
Tematy:
epidemia
zaraza
endemiczny
epidemic
pestilence
endemic
Opis:
The article discusses the meaning of the term ‘epidemic’ in the literary sources of ancient Greece and Rome. It presents an attempt at tracing the semantics of the words no/soj, loimo/j and e)pidemi/a in Greek literature and illustrates various usage of e)pidemi/a before Hippocrates. It also shows what terms were used by Roman scribes to define pestilence or points out that Homer used the word in Illiad in the meaning of: “this one who liked passionately the frightening civil war”. Sophocles used ‘epidemios’ in King Oedipus referring to dissemination and propagation of the king’s fame. The authors before Hippocrates applied this term almost to any phenomenon (people, rain, war) except for disease. Hippocrates was the first one to adapt it to medical terminology. (P. Martin, E. Martin, 2,500-year …).
Źródło:
Seminare. Poszukiwania naukowe; 2014, 35, 4; 175-184
1232-8766
Pojawia się w:
Seminare. Poszukiwania naukowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of microsatellite markers for horse-chestnut (Aesculus hippocastanum), their polymorphism in natural Greek populations, and cross-amplification in related species
Autorzy:
Walas, L.
Iszkulo, G.
Barina, Z.
Dering, M.
Powiązania:
https://bibliotekanauki.pl/articles/2078223.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Tertiary relict
endemic species
cross-amplification
polymorphism
Opis:
New nuclear microsatellite markers (SSRs) were developed for Aesculus hippocastanum, a relict tree species from the Balkan Peninsula. The development of microsatellites was done using the Illumina MiSeq PE300 platform. Out of a set of 500 SSRs designed, a subset of 13 loci was tested using 290 individuals from seven natural populations. Twelve species-specific loci were polymorphic. The number of alleles per locus ranged from 2 to 17 and expected heterozygosity from 0.089 to 0.800 with a mean value of 0.484. The population of Kalampaka had the lowest value of allelic richness (2.63) and gene diversity in comparison to the remaining populations. STRUCTURE analysis confirmed isolation of population Mariolata from the southern edge of the species range and genetic similarity among populations from the Pindos Mts. Additionally, the utility of new SSRs in 29 individuals from nine other Aesculus taxa was tested. Eleven markers gave polymorphic products for all tested species. For 24 individuals, a high-quality product was obtained for each marker. Results confirmed the utility of specific markers for future population genetics studies.
Źródło:
Dendrobiology; 2021, 85; 105-116
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity of Galium cracoviense Ehrend. [Rubiaceae] - the Polish endemic plant
Autorzy:
Cieslak, E
Szelag, Z.
Powiązania:
https://bibliotekanauki.pl/articles/58412.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Rubiaceae
endemic plant
endemic species
Polska
Galium cracoviense
genetic diversity
population genetics
gene flow
glacial relict
isolated population
Opis:
Genetic diversity of Galium cracoviense, a narrow endemic species, limited to the small area in southern Poland and concentrated on Jurassic limestone outcrops near Częstochowa, was examined using the AFLP marker. Twenty nine individuals from three spatially isolated populations were used for the study. AFLP analysis yielded 157 bands, of which 110 (70%) were polymorphic. The AMOVA analysis revealed a substantially higher variation within populations (89.35%) than among them (10.65%). Values of parameters describing population genetic diversity, such as Shannon index and gene diversity index estimated for each population, were highly similar. The results indicate a high level of genetic polymorphism as well as a high genetic similarity of the isolated populations of G. cracoviense and thus an unconstrained gene flow between them. Based on the results we conclude that additional demographic and genetic studies, are necessary to monitor potential decrease of populations size resulting mainly from the mechanical destruction of plants and their habitats caused by intense tourism. Due to the small general range of occurrence, conservation should include the highest possible number of populations of G. cracoviense.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 123-129
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution patterns and habitats of endemic vascular plants in the Polish Carpathians
Autorzy:
Piekos-Mirkowa, H
Mirek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/58249.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
endemic plant
Polska
Carpathians Mountains
vascular plant
habitat
distribution
Opis:
The paper deals with the richness and diversity of endemic and subendemic taxa in the Polish Carpathians. Based on critical studies in the literature and the authors' unpublished materials collected in the field, the distribution patterns of endemic species are analysed and discussed. The participation of endemics in the flora of single Carpathian ranges is assessed and analysed. The importance of the Tatra Mts as a centre of endemism is stressed. The frequency and altitudinal ranges of endemic taxa are characterized and their syntaxonomical spectrum is presented.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 321-326
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of culture conditions on shikonin derivatives accumulation in nontransformed and transformed roots of Rindera graeca (A. DC.) Boiss. et Heldr. (A. DC.)
Autorzy:
Syklowska-Baranek, K.
Bolonkowska, O.
Jeziorek, M.
Szyszko, E.
Powala, J.
Pietrosiuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/951268.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
Rindera graeca
Boraginaceae
endemic plant
root line
fresh biomass
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rhaponticum carthamoides regeneration through direct and indirect organogenesis, molecular profiles and secondary metabolite production
Autorzy:
Skala, E.
Grabkowska, R.
Sitarek, P.
Kuzma, L.
Wysokinska, H.
Powiązania:
https://bibliotekanauki.pl/articles/951228.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Rhaponticum carthamoides
endemic plant
perennial plant
herbaceous plant
organogenesis
seedling explant
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jodła sycylijska na skraju wyginięcia – czy istnieje szansa dla tego krytycznie zagrożonego gatunku?
Sicilian fir near to extinction – Is there any chance for this critically endangered species?
Autorzy:
Sękiewicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1186043.pdf
Data publikacji:
2020-02-19
Wydawca:
Polskie Towarzystwo Dendrologiczne
Tematy:
biodiversity hotspot
conservation status
endemic
Mediterranean region
Sicilian fir
threatened species
Opis:
In the mountains of the north-central Sicily (Italy), a small and isolated population of Sicilian fir (Abies nebrodensis) has survived to the present day. It is the most unique species of the Sicilian flora, not only because of its taxonomic position, but mostly because of its endemic and relict status and the serious risk of extinction. The single natural population of this extremely rare species is currently represented by only 30 mature individuals scattered over a small area in the Madonie Mountains. This species has experienced intensive population decline since the end of the 17th century, and its situation became extremely critical in the first decades of the 19th century due to deforestation and overgrazing. Consequently, Sicilian fir was considered to be extinct about three decades before being rediscovered on the Madonie Mts. in 1937. Sicilian fir is recognized as one of the most endangered coniferous species in the world. It is classified as critically endangered by IUCN, and also included in the list of 50 most endangered plant species in the Mediterranean region. Currently, the limited population size, a small proportion of reproductive individuals, habitat loss, ongoing and projected climate change, and hybridization with other species pose serious threats to survival of this species. Therefore, it is extremely important to maintain actions focusing on in situ and ex situ conservation in order to preserve and protect the existing resources of Sicilian fir, which represents the natural heritage unique to the Mediterranean.
Źródło:
Rocznik Polskiego Towarzystwa Dendrologicznego; 2019, 67; 39-48
2080-4164
2300-8326
Pojawia się w:
Rocznik Polskiego Towarzystwa Dendrologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Last two hundred individuals: rediscovery of Scilla mesopotamica Speta [Hyacinthaceae], a threatened endemic species in Turkey
Autorzy:
Eker, I
Akan, H.
Powiązania:
https://bibliotekanauki.pl/articles/57209.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
rediscovery
Scilla mesopotamica
Hyacinthaceae
threatened species
endemic species
Turkey [geogr.]
conservation
Opis:
In this paper, the rediscovery of endemic and long missing species, Scilla mesopotamica Speta which had been only known from the type gathering, is given. The species has not been collected again after Sintenis in 1888, whose specimens served Speta for description of the new taxon. In 2004, the authors found it in a steppic rocky area, near Halfeti in Şanliurfa province, South East Anatolia, Turkey. After analyzing Sintenis' original collection notes, they concluded that this area is identical with the type locality. S. mesopotamica has an extremely limited distribution and is represented by less than 200 specimens in the single known population that covers less than 50 m2. Taxonomy of the species, detailed description with illustrations, geographical distribution, habitat, ecology and status of IUCN extinction risk and some comments on conservation of the plant are also presented.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 1; 31-36
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 34

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