Science & Mathematics

Biz ijtimoiylashtirish togrisida gapirar ekanmiz, odam ham, guruh ham, biomuhit va kosmos ham inson koziga korinib va uning qalbida aks etib, maqsadga muvofiq bolmasa ham, tasodifan (korinishi boyicha, mohiyati boyicha esa muqarrar va qonuniy) insonga tasir korsatib shaxsni shakllantiradi.

This comprehensive study introduces a meticulously designed and characterized terahertz (THz) multiple-input multiple-output (MIMO) antenna engineered to operate within the 0.4 THz to 1.6 THz frequency range. The antenna’s construction includes a copper patch and ground plane integrated into a polyimide substrate, ensuring exceptional durability and robust performance. Significantly, the antenna reveals four distinct resonance frequencies at 0.46 THz, 0.9 THz, 1.31 THz, and 1.44 THz each accompanied by bandwidths of 0.005 THz, 0.17 THz, and 0.34 THz, respectively. Moreover, the antenna delivers notable gains of 8.52 dB, 11.54 dB, and 13.25 dB at these frequencies, coupled with substantial efficiencies of 88.32%, 92.02%, and 89.89%, respectively. Additionally, the antenna showcases exceptional isolation of 26 dB, a low envelope correlation coefficient (ECC) of 0.003, and a diversity gain (DG) of 9.98. These remarkable attributes underscore the antenna’s aptness for high-performance THz applications, offering substantial advantages in terms of gain, efficiency, and isolation for next-generation wireless communication systems.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

Este artículo presenta una investigación que busca conocer las percepciones que los profesores de EducaciónPrimaria en formación tienen de la investigación educativa. Para lograrlo, se realizó un estudio cualitativo deenfoque fenomenográfico con veinte estudiantes de Magisterio en Educación Primaria de la UniversidadAutónoma de Madrid. Los resultados, en contraste con estudios anteriores, apuntan a que los futuros profesores perciben a la investigación como un saber importante y necesario para su profesión y valoran positivamente el trabajo de los investigadores. Sin embargo, creen que su formación en investigación debe ser mejor y más útil para su desempeño docente.

33. Wohlfahrtia spinisternum Ge, Pape & Zhang, 2018Material examined. Holotype ♂ (NZMC): Xinjiang, Kalamaili / 45°13’N 88°50’E, 900m / 24–27.V.2014, T. Pape leg.Distribution. China (Xinjiang).Remarks. This species was described by Ge et al. (2018) based on the present material.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

Mazkur maqolada raqamli transformatsiya sharoitida korxona boshqaruvining tashkiliy-iqtisodiysamaradorligini oshirish yo‘llari kompleks ilmiy yondashuv asosida tadqiq etilgan. Tadqiqotning dolzarbligi raqamlitexnologiyalar keng joriy etilayotgan zamonaviy sharoitda korxonalarda boshqaruv tizimlarini modernizatsiya qilish,resurslardan samarali foydalanish hamda raqobatbardoshlikni oshirish zarurati bilan izohlanadi. Maqolaning asosiymaqsadi raqamli transformatsiya jarayonlarining korxona boshqaruviga ta’sirini tahlil qilish, tashkiliy va iqtisodiymexanizmlar o‘rtasidagi o‘zaro bog‘liqlikni aniqlash hamda samaradorlikni oshirishga qaratilgan ilmiy-amaliy tavsiyalarishlab chiqishdan iborat.

Digital financial services (DFS) offer potential economic benefits to rural farmers by improving access to credit, insurance, and market information. A mixed-methods approach combining qualitative interviews with quantitative data on DFS usage and farmer income changes. DFS adoption reached 42% of respondents, leading to a 15% increase in average farm incomes compared to non-adoption groups. Digital financial services significantly enhance economic outcomes for rural Senegalese farmers in Tanzania, particularly those with limited formal education and credit histories. Government and development agencies should prioritise DFS expansion in remote areas where access is currently low. Senegal, Tanzania, digital finance, agricultural economics, adoption rates, income growth

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.