Search results for "Head"
showing 10 items of 1640 documents
A Comprehensive Model for Hydraulic Analysis and Wetting Patterns Simulation under Subsurface Drip Laterals
2022
In the absence of suitable specialized models to simulate the soil wetting patterns in subsurface drip irrigation systems considering the hydraulic conditions along the laterals, a new model was developed and named a “comprehensive model” in this study. This model couples the subsurface drip irrigation lateral characteristics with the soil hydraulic properties and utilizes the Hydrus-3D software as a complementary section of the model to simulate the wetting front beneath the lateral. To evaluate the model, three 16 mm drip-line pipes of 62 m length with 20, 40, and 50 cm spacing emitters and 2 to 5 L/h discharge were buried at 0.2 m depth in a soil box containing clay loamy soil. Then, the…
New perspectives in medical approach to therapy of head and neck squamous cell carcinoma
2009
Head and neck cancer is the eighth most common cause of cancer death worldwide. Its incidence varies widely among different regions. In North America and the European Union, head and neck cancer accounts for 3% to 4% of all cancer diagnoses. Conversely, in Southeast Asia and Africa, head and neck cancer accounts for approximately 8% to 10% of all cancers1. Although the incidence of head and neck cancers has decreased slightly from 1975 to 2002 in the United States5, approximately 46 000 new cases are still expected in 2007 alone. Even if surgery and radiotherapy have remained the core therapy in squamous cell carcinoma of the head and neck (HNSCC). Radiotherapy following surgery was the sta…
Aortic pulse wave velocity in children with migraine: a case control study
2018
Background: Migraine has been associated with increased risk of cardiovascular (CV) accident like angina and myocardial infarction(1) . Vascular changes in migraineur traditionally may prevail in cranial blood district, but more likely it is a generalized vascular phenomenon.(2) Previous studies showed an increased aortic pulse wave velocity (aPWV), a direct measure of aortic stiffness and an independent predictor of stroke and CV disease, in young and middle-aged migraineurs(3) Here we hypothesized that, if associated with the pathogenetic bases of the disease, increased aPWV should be appreciable also in migraineurs children. Materials and Methods: : We studied 10 children with migraine w…
Volatile compounds of fresh fruits of Phillyrea latifolia L.
2004
The volatiles constituents of fresh fruits of Phillyrea latifolia were submitted to investigation by GC-MS. The plants grows wild in different zones of the mediterranean region and its leaves and fruits are used as astringent, diuretic and anti-inflammatory. The volatiles were sampled by solid-phase microextraction (SPME), with a 100 mm polydimethylsiloxane fibre a 50 °C for 1 h. The headspace main components of fresh fruits of Phillyrea latifolia included limonene, β-cariophillene, eremophilene, α-muurolene, β -eudesmol e spatulenol.
Benign nocturnal alternating hemiplegia of chilhood: A new case
2009
A New Cross-Flow Type Turbine for Ultra-Low Head in Streams and Channels
2023
In the last few decades, hydropower production has been moving toward a new paradigm of low and diffused power density production of energy with small and mini-hydro plants, which usually do not require significant water storage. In the case of nominal power lower than 20 kW and ultra-low head H (H < 5 m), Archimedes screw or Kaplan type turbines are usually chosen due to their efficiency, which is higher than 0.85. A new cross-flow type turbine called Ultra-low Power Recovery System (UL-PRS) is proposed and its geometry and design criteria are validated in a wide range of operating conditions through 2D numerical analysis computed using the ANSYS Fluent solver. The new proposed solution…
Literatūras žanra/formas priekšmetu veidošana: salīdzinošais aspekts
2018
Maģistra darbs "Literatūras žanra/formas priekšmetu veidošana: salīdzinošais aspekts" izstrādāts ar mērķi, lai noskaidrotu literatūras žanra/formas priekšmetu lietderību un nepieciešamību tos ieviest LNB. Pētījuma gaitā tiek analizētas tās bibliotēkas, kas jau sekmīgi izstrādā un ievieš literatūras žanra/formas priekšmetus. Pragmatisma un žanra teorijas atziņas tiek piemērotas bibliotekārā darba kataloģizēšanas procesu izstrādei. Rezultātu iegūšanai tiek izmantotas kvalitatīvas un kvantitatīvas metodes. Pētījumā tiek iegūti apstiprinoši rezultāti, literatūras žanra/formas priekšmetu lietderībai un nepieciešamībai.
Forehead Patch Size Predicts the Outcome of Male–Male Competition in the Pied Flycatcher
2013
Males of many animal species express ornaments that affect their reproduction opportunities through male–male competition or female mate choice. Such ornaments can, for example, inform conspecifics about the fighting ability, condition or territory ownership of the bearer. Pied flycatcher (Ficedula hypoleuca) males have a conspicuous white forehead patch that varies greatly in size. We examined whether the white forehead patch is an intrasexually selected trait in a Finnish population. We artificially manipulated forehead patch size to represent two naturally occurring extremes and competed males against each other in the presence of a female. Males with a large forehead patch were more agg…
History Matters: Colonial‑Based Connectivity and Foreign Headquarter Location Choice
2022
AbstractIn this study, we argue that European countries’ extensive relationships with former colonies represent a location factor that attracts foreign headquarter investments. The strategic role of foreign headquarters as coordinators, opportunity detectors, and global bridgeheads makes the location choice of headquarter activities sensitive to historical-based institutional connections. Drawing on a sample of 2230 foreign headquarter investments in Europe, we find that the stronger the combined effect of historical connections and current economic relationships with former colonies, the higher the probability of attracting headquarter investment projects. We refer to this combined charact…
The Head of State, the President of the Government, and the Minister of Foreign Affairs
2023
The Head of State, the President of the Government, and the Minister of Foreign Affairs. 1. International competences. 2. Inviolability, privileges, and immunities. 3. International protection of the Head of State or Government, or of the Minister of Foreign Affairs.