1,025 research outputs found
1-(3-Chlorobenzoyl)-3-(2,3-dimethylphenyl)thiourea
The title molecule, C16H15ClN2OS, exists in the solid state in its thione form with typical thiourea C—S and C—O bonds lengths, as well as shortened C—N bonds. An intramolecular N—H⋯O hydrogen bond stabilizes the molecular conformation and intermolecular N—H⋯S hydrogen bonds link the molecules into centrosymmetric dimers. The dihedral angle between the aromatic rings is 50.18 (5)°
Coexistence Analysis between Radar and Cellular System in LoS Channel
Sharing spectrum with incumbents such as radar systems is an attractive
solution for cellular operators in order to meet the ever growing bandwidth
requirements and ease the spectrum crunch problem. In order to realize
efficient spectrum sharing, interference mitigation techniques are required. In
this letter we address techniques to mitigate MIMO radar interference at MIMO
cellular base stations (BSs). We specifically look at the amount of power
received at BSs when radar uses null space projection (NSP)-based interference
mitigation method. NSP reduces the amount of projected power at targets that
are in-close vicinity to BSs. We study this issue and show that this can be
avoided if radar employs a larger transmit array. In addition, we compute the
coherence time of channel between radar and BSs and show that the coherence
time of channel is much larger than the pulse repetition interval of radars.
Therefore, NSP-based interference mitigation techniques which depends on
accurate channel state information (CSI) can be effective as the problem of CSI
being outdated does not occur for most practical scenarios.Comment: Corrected some typos and reference
1-(2,6-Dichlorobenzoyl)-3-(3-methoxyphenyl)thiourea
The two aromatic rings in the title compound, C15H12Cl2N2O2S, enclose a dihedral angle of 37.49 (6)°. The molecule exists in the solid state in its thione form with typical thiourea C-S and C-O bonds lengths, as well as shortened C-N bonds. An intramolecular N-H...O hydrogen bond stabilizes the molecular conformation. In the crystal, molecules are connected by N-H...O and N-H...S hydrogen bonds, forming chains running along the alpha axis. Key indicators: single-crystal X-ray study; T = 173 K; mean σ (C–C) = 0.002 Å; disorder in main residue; R factor = 0.035; wR factor = 0.087; data-to-parameter ratio = 18.9
1-(4-Chlorophenyl)-3-(2,4-dichlorobenzoyl)thiourea
The title compound, C14H9Cl3N2OS, has bond lengths and angles which are quite typical for thiourea compounds of this class. The molecule exists in the solid state in its thione form with typical thiourea C=S and C=O bond lengths, as well as shortened C—N bonds. An intramolecular N—H⋯O hydrogen bond stabilizes the molecular conformation. Intermolecular N—H⋯S hydrogen bonds link the molecules to form centrosymmetric dimers
Weed flora, yield losses and weed control in cotton crop
Cotton (Gossypium spp.) is the most important fiber crop of world and provides fiber, oil, and animals meals. Weeds interfere with the growth activities of cotton plants and compete with it for resources. All kinds of weeds (grasses, sedges, and broadleaves) have been noted to infest cotton crop. Weeds can cause more than 30% decrease in cotton productivity. Several methods are available for weed control in cotton. Cultural control carries significance for weed control up to a certain extent. However, mechanical control and chemical control are the backbone of weed management plans in cotton crop. Use of allelopathy has also been found effective for suppressing weeds in cotton. Allelopathy used in several forms (such as intercropping, mulches, and crop rotation) contributes to weed control in cotton crop. All of these weed management practices may be integrated to achieve economical and sustainable weed control in cotton with an ultimate result of improved weed control, productivity, quality of produce in cotton crop.Unkrautflora, Ertragsverluste und Unkrautkontrolle in BaumwolleBaumwolle (Gossypium spp.) ist die bedeutsamste Faserpflanze der Welt und dient als Faser-, Öl- und Tiernahrungsquelle. Unkräuter beeinträchtigen das Wachstum der Baumwollpflanzen indem sie mit den Pflanzen um essentielle Ressourcen konkurrieren. Verschiedene Unkrautarten (Gräser, Seggen und dikotyle Arten) sind in Baumwolle bekannt und können zu Ertragsverlusten von mehr als 30 % führen. Für die Unkrautkontrolle in Baumwolle stehen verschiedene Verfahren zur Verfügung. Die Anwendung von ackerbaulichen Maßnahmen kann zu einem gewissen Teil zur Unkrautbekämpfung beitragen. Mechanische und chemische Verfahren werden aber als die wichtigsten Maßnahmen zur Unkrautkontrolle in Baumwolle angesehen. Auch der Einsatz von allelopathischen Einflüssen kann als wirkungsvolle Maßnahme eingestuft werden. Allelopathie kann in verschiedenen Formen (Zwischenfrüchte, Mulch and Fruchtfolge) genutzt werden und so zur Unkrautkontrolle in Baumwolle beitragen. Um eine ökonomische und nachhaltige Unkrautbekämpfung in Baumwolle sicherzustellen, sollten alle genannten Verfahren gemeinsam eingesetzt werden. Nur so kann das Ziel einer verbesserten Unkrautkontrolle, einer erhöhten Produktivität und einer verbesserter Qualität der Baumwolle erreicht werden
Socio-economic impacts of China Pakistan Economic Corridor (CPEC) at community level : case study of Gwadar Pakistan
Master's thesis Global development and planning UT505 - University of Agder 2019Development brings prosperity to the nations. The mega development projects such as sea ports, dams, infrastructures, railways, airportsetc. offerbetter employment opportunitiesand improved standard of lifein the country and gradually move the country from developing to developed States. At the same time, these mega projects forced people to leave their homes in the name of development. Development-induced displacements or forced evictions badly affect the socio-economic and socio-cultural aspects of the communities. Lack of adequate planning often make the affected people homeless and jobless for rest of their life. The resettlement policies are usually focused to compensate the affected communities in monetary terms. The need is to include socio-cultural aspect in resettlement policies to create positive social impact on affected communities. This study looks at the problems faced by fisherfolk of Gwadarin result of mega developments under CPEC. The livelihood of fisherfolk of Gwadar is disturbed since development work stated at Gwadar port. There is a high risk to fisherfolk of Gwadar will become more vulnerable soon due to the development-induced displacement. The situation will be more critical if the displacement affect the social life patterns of fisherfolk of Gwadar who are already exposed to the problems of water scarcity, health facilities and education since long
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