45 research outputs found
Good seed is the foundation of the crop : and when you order your seed corn from US you take no chances
No full text192
A CBCT based cross sectional study on the prevalence and anatomical feature of C shaped molar among Jordanian
No full textThe prevalence and anatomical features of C-Shaped Mandibular Second Molars (MSMs) are rarely studied in Jordanian sub-population. This study then took a part to evaluate the prevalence of C-shaped in MSMs using cone-beam computed tomography (CBCT) in the Jordanian sub-population. It used a cross-sectional design and three thousand scans collected over eight years between 2011 and 2019. The data were then reviewed for whether they were fully formed of MSMs. A total of 2037 cases that had 2845 MSMs were evaluated to identify C-shaped canals at coronal, middle, and apical sites. An oblique slicing module perpendicular to the long axis of MSMs was used to evaluate the teeth. The type and frequency of C-shaped canals, as well as the correlations between sex and side (right/left) and between sex and groove direction (buccal/lingual) were measured using the chi-square test on SPSS software at the significance level of 95%. A total of 342 teeth of 243 patients were C-shaped molars, which comprised 12% of the patient’s teeth and 99 of them as a bilateral C-shaped canal with mean age of 40 years and sex ratio of 2:1 between female and male. With the limitations of this study, the lingual groove and type 3 were the most common properties of MSM. Besides, the Jordanian population mostly had C-shaped canals
Endovascular Cooling Catheter For Selective Cerebral Hypothermia in Acute Stroke Therapy: An Animal Feasibility Study
No full textHeavy metals phytocumulation in selected species of herbs
No full textCelem przeprowadzonych badań była ocena fitokumulacji metali ciężkich w wybranych gatunkach ziół. Do badań pobrano pięć gatunków ziół wieloletnich: Mentha piperita L., Mentha rotundifolia (L.) Huds., Melissa officinalis L., Origanum vulgare, Rosmarinus officinalis, Thymus vulgaris L. Z poletka doświadczalnego położonego w Opolu (południowo-zachodnia Polska) pobrano próbki liści ziół oraz pięć zintegrowanych próbek gleby. W materiale badawczym pobranym w sierpniu 2015 roku, po mineralizacji w mineralizatorze mikrofalowym, oznaczono metale ciężkie: Mn, Fe, Ni, Cu, Zn, Cd i Pb z wykorzystaniem aparatu AAS iCE 3500 firmy Thermo Electron Corporation (USA). Wyniki przeprowadzonych badań zinterpretowano, wykorzystując współczynnik fitokumulacji (WF) i współczynnik specyficznej kumulacji (CSRA). Na podstawie przeprowadzonych badań stwierdzono m.in., że Thymus vulgaris L. intensywnie akumulował żelazo, natomiast ołów jest pierwiastkiem, który był w średnim stopniu kumulowany przez Origanum vulgare i Mentha rotundifolia (L.) Huds. Wybrane gatunki ziół ze względu na możliwość selektywnego akumulowania metali ciężkich mogą być wykorzystywane m.in. w biomonitoringu i fitoremediacji gleb terenów zurbanizowanych.The aim of the study was the assessment of phytocumulation of heavy metals in selected species of herbs. The study used five species of perennial herbs: Mentha piperita L., Mentha rotundifolia (L.) Huds., Melissa officinalis L., Origanum vulgare, Rosmarinus officinalis, Thymus vulgaris L. From plot situated in Opole (south-western Poland) from which the samples of leaves of herbs were collected were also collected five integrated soil samples. In the studied material collected in August 2015, after mineralization in microwave mineraliser were determined heavy metals: Mn, Fe, Ni, Cu, Zn, Cd and Pb using the AAS iCE 3500 device from Thermo Electron Corporation (USA). Results of this study were interpreted using phytocumulation factor (WF) and coefficient of specific relative accumulation (CSRA). Based on the obtained results it was stated i.a. that Thymus vulgaris L. intensively accumulated iron, whereas lead is an element that was moderately accumulated by Origanum vulgare and Mentha rotundifolia (L.) Huds. Selected species of herbs, because of the possibility of selective accumulation of heavy metals, may be used i.a. in biomonitoring and phytoremediation of soils in urban areas
Lógica interna do surf
No full textObjetivo: En este artículo analizaremos la lógica interna del surf teniendo como marco de referencia la Praxiología Motriz. Nuestro propósito es investigar los modos en que se relaciona el participante con el medio, los demás, los materiales y el tiempo, principalmente en el surf que es practicado de manera libre y no competitiva, pero también tomando algunas referencias de su vertiente deportiva. Método: Se utilizó una metodología cualitativa y de carácter interpretativo, basada fundamentalmente en la realización de observaciones participantes y entrevistas en playas de la ciudad de Mar del Plata (Argentina). Resultados y discusión: Tomando como punto de partida el concepto lógica interna, fueron indagadas las maneras en que el surfista se relaciona con el espacio, los demás, los materiales y el tiempo. Todos estos aspectos se encuentran claramente diferenciados, pero a la vez es necesario relacionarlos entre sí para que la práctica pueda ser estudiada de manera sistémica. Consideraciones finales: El estudio de la lógica interna nos permite una comprensión más completa del surf, evitando reducirlo solamente a su dimensión de técnica corporal. Esta investigación se proyecta como una herramienta de potencial interés para el docente a cargo de la enseñanza, brindando elementos para construir metodologías reflexivas.Objective: This article analyzes the internal logic of surfing, taking Motor Praxeology as the main theoretical framework. Its purpose is to study the ways in which participants relate to their environment, materials, time and other surfers, specifically in free surfing but with occasional references to competitive surfing. Method: A qualitative and interpretative methodology was utilized, which mainly consisted in participant observations and interviews conducted in Mar del Plata, Argentina. Results and discussion: Basing the analysis on the concept of internal logic, this study explored how freesurfers interact with other participants, space, materials and time. Even though these are clearly differentiated aspects, a systematic analysis of this discipline also requires a comprehensive understanding of the relations between them. Final considerations: An examination of the internal logic of surfing enables a more complete understanding of the discipline, avoiding its reduction to a mere body technique. This research may also be of potential interest to physical education teachers, as a tool to build more reflective methodologies.Objetivo: neste artigo vamos analisar a lógica interna do surf, tendo como quadro de referência a Praxiologia Motriz. Nosso propósito é investigar os modos com que se relaciona o participante com o meio, os outros, os materiais e o tempo, principalmente no surf praticado de forma livre e não competitiva, mas também tomando algumas referências de sua vertente esportiva. Método: utilizou-se uma metodologia qualitativa e de caráter interpretativo, baseada fundamentalmente na realização de observações participantes e entrevistas em praias da cidade de Mar del Plata (Argentina). Resultados e discussão: Tomando como ponto de partida o conceito lógica interna, foram indagadas as maneiras com que o surfista se relaciona com o espaço, os outros, os materiais e o tempo. Todos estes aspectos estão claramente diferenciados, mas ao mesmo tempo, é necessário relacioná-los entre si para que a prática possa ser estudada de forma sistemática. Considerações finais: O estudo da lógica interna nos permite uma compreensão mais completa do surf, evitando reduzi-lo apenas a sua dimensão de técnica corporal. Esta pesquisa se projeta como uma ferramenta de potencial interesse para o docente a cargo de ensino, fornecendo elementos para construir metodologias reflexivas.Fil: Saraví, Jorge Ricardo. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.Fil: Cibeyra, Dihuen. Universidad Nacional de La Plata, Argentina
Optimasi Pengelolaan Air Irigasi Pada Jaringan Irigasi Tarum Utara Barat Daerah Irigasi Jatiluhur Kabupaten Karawang Menggunakan Program Linier
No full textKetahanan pangan di Indonesia pada sektor hulu yaitu sektor pertanian, sangat
bergantung pada ketersediaan dan pengelolaan air irigasi yang efisien. Di Kabupaten Karawang,
Jawa Barat, Daerah Irigasi (D.I.) Jatiluhur menyediakan air untuk Jaringan Irigasi Tarum Utara
Barat seluas 44.640 ha, yang bersumber dari Sungai Citarum. Penelitian ini menyusun strategi
optimalisasi pengelolaan sumber daya air irigasi di Jaringan Irigasi Tarum Utara Barat, Daerah
Irigasi (D.I.) Jatiluhur, Kabupaten Karawang, melalui penerapan pendekatan optimasi linier.
Fokus kajian adalah meningkatkan intensitas penggunaan lahan dan keuntungan ekonomi pada
varietas padi serta tanaman palawija dengan menyusun Pola Tata Tanam. Strategi ini
mempertimbangkan secara komprehensif kapasitas pasokan air, kebutuhan air tanaman, dan
keterbatasan luas lahan.
Data lapangan mencakup luasan areal tanam, komponen biaya produksi, dan pola
distribusi debit irigasi diintegrasikan ke dalam model matematis bertujuan memaksimalkan
keuntungan bersih total, dengan memperhatikan batasan neraca air dan target intensitas tanam.
Simulasi model mengevaluasi empat skenario PTT: (1) Pola Eksisting (padi–padi–bero)
dengan IP 180%, (2) Alternatif 1 (padi biasa–padi biasa–bero), (3) Alternatif 2 (padi unggul–
padi unggul–padi unggul), dan (4) Alternatif 3 (padi unggul–jagung–padi biasa).
Hasil analisis mengungkap Alternatif 2 sebagai konfigurasi terunggul, ditunjukkan oleh
capaian: intensitas tanam 287%, tingkat keberhasilan irigasi 100% dari defisit air, nilai Benefit
Cost Ratio (BCR) 1,512, serta keuntungan tahunan sebesar Rp 6,188 triliun dengan
peningkatan signifikan sekitar 59,4% dibanding pola eksisting (BCR 1,512 keuntungan Rp
3,883 triliun). Meskipun Alternatif 1 juga layak secara finansial (BCR 1,512 keuntungan Rp
4,092 triliun), dan Alternatif 3 berhasil mendiversifikasi komoditas, skema terakhir ini
mencatat penurunan efisiensi ekonomi (BCR 1,190) dengan realisasi keuntungan hanya Rp
1,761 triliun. Pendekatan optimasi linier berhasil memformulasikan kombinasi optimal antara
alokasi luas tanam dan distribusi air guna memaksimalkan pendapatan di bawah berbagai
kendala sumber daya. Berdasarkan temuan kajian, Alternatif 2 direkomendasikan sebagai pola
tanam terbaik. Implementasinya perlu didukung oleh peningkatan kapasitas infrastruktur
irigasi, kebijakan bantuan sarana produksi, serta program pendampingan teknis bagi petani
guna mewujudkan sistem intensifikasi pertanian berkelanjutan dengan produktivitas tinggi.
Kata kunci: Optimalisasi Pengelolaan Sumber Daya Air Irigasi, Pola Tanam, Program
Linier, Intensitas Tanam, BCR.
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Food security in Indonesia's upstream agricultural sector is significantly reliant on the
availability and effective management of irrigation water. In Karawang Regency, West Java,
the Jatiluhur Irrigation Area (DI) supplies water to the 44,640-hectare Northwest Tarum
Irrigation Network, sourced from the Citarum River. This study aims to develop a strategy for
optimizing irrigation water resource management within the Northwest Tarum Irrigation
Network, Jatiluhur Irrigation Area (DI), through the application of a linear optimization
approach. The focus is on enhancing land use intensity and economic returns for rice varieties
and secondary crops by developing effective cropping patterns. This strategy comprehensively
considers water supply capacity, crop water requirements, and land area constraints.
Field data, including planted area, components of production costs, and irrigation
discharge distribution patterns, are integrated into a mathematical model designed to maximize
total net profit while adhering to water balance constraints and cropping intensity targets. The
model simulation evaluated four cropping pattern scenarios: (1) Existing Pattern (rice–rice–
fallow) with an irrigation productivity (IP) of 180%, (2) Alternative 1 (regular rice–regular
rice–fallow), (3) Alternative 2 (superior rice–superior rice–superior rice), and (4) Alternative
3 (superior rice–corn–regular rice).
The analysis identified Alternative 2 as the most effective farming configuration,
achieving a 287% planting intensity, a 100% irrigation success rate, a Benefit-Cost Ratio
(BCR) of 1.512, and annual profits of IDR 6.188 trillion, with59.4% more than the current
pattern. Alternative 1 also showed viability with the same BCR and profits of IDR 4.092 trillion,
while Alternative 3 had a lower BCR of 1.190 and profits of IDR 1.761 trillion. A linear
optimization approach was used to maximize income through optimal planting area and water
distribution. To implement Alternative 2 successfully, improved irrigation infrastructure,
supportive policies, and technical assistance for farmers are needed to achieve sustainable
agricultural intensification.
Keywords: Optimization of Irrigation Water Resource Management, Cropping Pattern,
Linear Program, Planting Intensity, BCR
