references -- Query Results

	references Home \| Show All \| Simple Search \| Advanced Search	Login Quick Search: Field: contains: ...
	201–210 of 267 records found matching your query (RSS):

Search & Display Options

Select All Deselect All

[11–20] << 21 22 23 24 25 26 27 >>

List View

Citations

Details

	Records
	Author	Ardelt, G.; Külls, C.; Hellbrück, H.
	Title	Towards intrinsic molecular communication using isotopic isomerism			Type	Journal Article
	Year	2018	Publication	Open Journal of Internet Of Things (OJIOT)	Abbreviated Journal
	Volume	4	Issue	1	Pages	135-143
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	RonPub	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Ardelt2018towards			Serial	18
Permanent link to this record



	Author	Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C.
	Title	Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements			Type	Journal Article
	Year	2022	Publication	Water	Abbreviated Journal
	Volume	14	Issue	5	Pages
	Keywords
	Abstract	Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2073-4441	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Marinos2022			Serial	82
Permanent link to this record



	Author	Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C.
	Title	Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements			Type	Journal Article
	Year	2022	Publication	Water	Abbreviated Journal
	Volume	14	Issue	5	Pages
	Keywords
	Abstract	Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2073-4441	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ w14050734			Serial	81
Permanent link to this record



	Author	Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C.
	Title	Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements			Type	Journal Article
	Year	2022	Publication	Water	Abbreviated Journal
	Volume	14	Issue	5	Pages
	Keywords
	Abstract	Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2073-4441	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ w14050734			Serial	85
Permanent link to this record



	Author	Aldawsari, S.; Kampmann, R.; Harnisch, J.; Rohde, C.
	Title	Setting Time, Microstructure, and Durability Properties of Low Calcium Fly Ash/Slag Geopolymer: A Review			Type	Journal Article
	Year	2022	Publication	Materials	Abbreviated Journal
	Volume	15	Issue	3	Pages
	Keywords
	Abstract	Ordinary Portland cement (OPC) is known for its significant contribution to carbon dioxide emissions. Geopolymer has a lower footprint in terms of CO2 emissions and has been considered as an alternative for OPC. A well-developed understanding of the use of fly-ash-based and slag-based geopolymers as separate systems has been reached in the literature, specifically regarding their mechanical properties. However, the microstructural and durability of the combined system after slag addition introduces more interactive gels and complex microstructural formations. The microstructural changes of complex blended systems contribute to significant advances in the durability of fly ash/slag geopolymers. In the present review, the setting time, microstructural properties (gel phase development, permeability properties, shrinkage behavior), and durability (chloride resistance, sulfate attack, and carbonatation), as discussed literature, are studied and summarized to simplify and draw conclusions.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1996-1944	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ ma15030876			Serial	84
Permanent link to this record



	Author	Külls, C.
	Title	Groundwater of the North-Western Kalahari, Namibia: estimation of recharge and quantification of the flow system			Type	Book Whole
	Year	2001	Publication	Hydrogeologie und Umwelt	Abbreviated Journal
	Volume		Issue		Pages
	Keywords
	Abstract
	Address
	Corporate Author				Thesis	Doctoral thesis
	Publisher	Hydrogeologie und Umwelt	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Kuells2003groundwater			Serial	38
Permanent link to this record



	Author	Leibundgut, C.; Maloszewski, P.; Külls, C.
	Title	Tracers in Hydrology			Type	Book Whole
	Year	2009	Publication		Abbreviated Journal
	Volume		Issue	1. Ed.	Pages
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	John Wiley & Sons, Ltd	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Leibundgut2009tracers			Serial	37
Permanent link to this record



	Author	de Jong, I.J.H.; Arif, S.S.; Gollapalli, P.K.R.; Neelam, P.; Nofal, E.R.; Reddy, K.Y.; Röttcher, K.; Zohrabi, N.
	Title	Improving agricultural water productivity with a focus on rural transformation*			Type	Journal Article
	Year	2021	Publication	Irrigation and Drainage	Abbreviated Journal
	Volume	70	Issue	3	Pages	458-469
	Keywords	irrigation efficiency, water productivity, rural transformation, efficacité de l’irrigation, productivité de l’eau, transformation rurale
	Abstract	ABSTRACT As a result of population growth, economic development and climate change, feeding the world and providing water security will require important changes in the technologies, institutions, policies and incentives that drive present-day water management, as captured in Goal 6.4 of the Millennium Development Goals. Irrigation is the largest and most inefficient water user, and there is an expectation that even small improvements in agricultural water productivity will improve water security. This paper argues that improvements in irrigation water productivity involves a complex and comprehensive rural transformation that goes beyond mere promotion of water saving technologies. Many of the measures to improve water productivity require significant changes in the production systems of farmers and in the support provided to them. Looking forward, water use and competition over water are expected to further increase. By 2025, about 1.8 billion people will be living in regions or countries with absolute water scarcity. Demand for water will rise exponentially, while supply becomes more erratic and uncertain, prompting the need for significant shifts of inter-sectoral water allocation to support continued economic growth. Advances in the use of remote sensing technologies will make it increasingly possible to cost-effectively and accurately estimate crop evapotranspiration from farmers’ fields.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ https://doi.org/10.1002/ird.2451			Serial	89
Permanent link to this record



	Author	Zagana, E.; Külls, C.; Udluft, P.; Constantinou, C.
	Title	Methods of groundwater recharge estimation in eastern Mediterranean water balance model application in Greece, Cyprus and Jordan			Type	Journal Article
	Year	2007	Publication	Hydrological Processes: An International Journal	Abbreviated Journal
	Volume	21	Issue	18	Pages	2405-2414
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	John Wiley & Sons, Ltd. Chichester, UK	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Zagana2007methods			Serial	30
Permanent link to this record



	Author	Zagana, E.; Obeidat, M.; Külls, C.; Udluft, P.
	Title	Chloride, hydrochemical and isotope methods of groundwater recharge estimation in eastern Mediterranean areas: a case study in Jordan			Type	Journal Article
	Year	2007	Publication	Hydrological Processes: An International Journal	Abbreviated Journal
	Volume	21	Issue	16	Pages	2112-2123
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	John Wiley & Sons, Ltd. Chichester, UK	Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	THL @ christoph.kuells @ Zagana2007chloride			Serial	29
Permanent link to this record