596 research outputs found
The Inner Quality Concept for food, based on life processes
How can we adequately express the quality of food produced by organic agriculture? To answer this research question, we defined a concept of ‘inner quality’ (formerly called ‘vital quality’) based on the life processes growth and differentiation, and their integration. Growers use management methods to influence life processes in their crops, thus optimising the quality of the final product. Traders and consumers can recognise certain product properties as being the result of these life processes. Here, we present a course of validation for the quality concept, together with appropriate quality parameters. The process of validation has been completed in part for two experimental crops, apple and carrot. This quality concept can provide a holistic context for the interpretation of individual food quality parameters as developed by different laboratories
B. Evers-Emden, B.-J. Flim, Ondergedoken geweest - een afgesloten verleden? Joodse 'kinderen' over hun onderduiken - vijftig jaar later
In Conversation with Mubin Shaikh: From Salafi Jihadist to Undercover Agent inside the "Toronto 18" Terrorist Group
This interview with former undercover agent Mubin Shaikh can help academics and security practitioners understand the key role played and the challenges faced by covert human intelligence sources within domestic terrorist groups. The interview highlights the identity crisis, the personal factors, and the allure of jihadi militancy that initially drove Shaikh to join a Salafi jihadist group. It investigates Shaikh’s process of disengagement from the Salafi jihadist belief system and his rediscovery of a moderate, inclusive, and benevolent form of Islam. It explores his work as an undercover agent for the Canadian Security Intelligence Service, the Royal Canadian Mounted Police, and the Integrated National Security Enforcement Team responsible for disrupting domestic terrorist groups. The “Toronto 18” terrorist cell, the key role played by undercover agents in preventing terrorist action, and the challenges posed by entrapment are also discussed
An early warning indicator for atmospheric blocking events using transfer operators
The existence of persistent midlatitude atmospheric flow regimes with
time-scales larger than 5-10 days and indications of preferred transitions
between them motivates to develop early warning indicators for such regime
transitions. In this paper, we use a hemispheric barotropic model together with
estimates of transfer operators on a reduced phase space to develop an early
warning indicator of the zonal to blocked flow transition in this model. It is
shown that, the spectrum of the transfer operators can be used to study the
slow dynamics of the flow as well as the non-Markovian character of the
reduction. The slowest motions are thereby found to have time scales of three
to six weeks and to be associated with meta-stable regimes (and their
transitions) which can be detected as almost-invariant sets of the transfer
operator. From the energy budget of the model, we are able to explain the
meta-stability of the regimes and the existence of preferred transition paths.
Even though the model is highly simplified, the skill of the early warning
indicator is promising, suggesting that the transfer operator approach can be
used in parallel to an operational deterministic model for stochastic
prediction or to assess forecast uncertainty
PlantyOrganic: design and results 2012
Increasingly strict legislation about fertilizer inputs and developing organic regulations are a strong stimulation to optimize the internal nutrient dynamics of organic arable farms. In the project ' PlantyOrganic', initialized by Biowad and realized at SPNA location Kollumerwaard, a challenging arable system is developed and tested: 100% internal nitrogen supply without input of nutrients from outside. In this report the design of the rotation and fertilizer scheme is presented and discussed, and the starting conditions in spring 2012 are documented. The NDICEA nitrogen model is used to explore the nitrogen dynamics. It is concluded that a 100% farm-own nitrogen supply can be achieved with good production levels. The 2012 results gave no reason to reconsider the rotation and fertilizer design, but since this was the first year of this experiment none of the crops had the pre-crop as foreseen in the design and the fertilizer used was only partly cut-and-carry fertilize
Effect meerjarige toepassing groenbemester en organische mest op bodemkwaliteit bij continuteelt maïs : 2e rapport project Zorg voor Zand
In 2005 is onderzoek gedaan naar het effect van meerjarige toepassing van groenbemester en organische bemesting op diverse bodemkwaliteitskenmerken bij continuteelt van snijmaïs op zandgrond. De conclusie is dat het effect op de bodemkwaliteit en gewasopbrengst van organische bemesting wat groter was dan van groenbemester. De biologische activiteit werd nauwelijks beïnvloed door beide behandelingen
New diphosphine ligands based on heterocyclic aromatics inducing very high regioselectivity in rhodium-catalyzed hydroformylation: effect of the bite angle
The principle of a virtual multi-channel lock-in amplifier and its application to magnetoelectric measurement system
This letter presents principles and applications of a virtual multi-channel
lock-in amplifier that is a simple but effective method to recover small ac
signal from noise with high presison. The fundamentals of this method are based
on calculation of cross-correlation function. Via this method, we successfully
built up a magnetoelectric measurement system which can perform precise and
versatile measurements without any analog lock-in amplifier. Using the virtual
multi-channel lock-in amplifier, the output of the magnetoelectric measurement
system is extensively rich in magnetoelectric coupling behaviors, including
coupling strength and phase lag, under various dc bias magnetic field and ac
magnetic field.Comment: 11 pages, 6 figures. To be submitted to Rev. Sci. Instr
A qualitative study on factors influencing the situational and contextual motivation of medical specialists
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