Disease suppressive soilless culture systems; characterisation of its microflora

The trend in glasshouse horticulture has always been to start culture systems as aseptic as possible. However, several root diseases still cause problems under these conditions. The present paper shows the importance of the microflora to suppress Pythium aphanidermatum, a fungal root pathogen which is a serious threat in cucumber. Introduced single antagonists as well as the indigenous microflora suppressed pythium root and crown rot. Pseudomonas fluorescens, Streptomyces griseoviridis, Pythium oligandrum, and 2 isolates of Trichoderma harzianum reduced the disease occurrence by 60 ␘r more in several, but not all, of the experiments. The indigenous microflora showed a very constant disease suppression of 50 to 100 &Eth;This was tested in experiments where P. aphanidermatum was added to sterilised and non-sterilised rockwool, and to sterilised rockwool that had been recolonised with the original microflora. Suppressiveness correlated with the number of filamentous actinomycetes present in the nutrient solution in the rockwool slabs. If a beneficial microflora is present in the cropping system, it should not be disturbed or eradicated by treatments such as disinfection of the recirculated nutrient solution. Therefore, the effects of different disinfection procedures on the composition of the microflora were compared. Numbers of filamentous actinomycetes in the nutrient solution in the tank after the disinfection treatment were highest without disinfection, intermediate after slow filtration, and lowest after UV treatment. Numbers of actinomycetes in the slabs, i.e. around the roots, were not distinctly different between the treatments. The implication of potential shifts in the microbial populations due to certain treatments for the disease development is not known. Increased knowledge on the beneficial microflora and the treatments that influence the composition of such a microflora, will stimulate the exploitation of microbially balanced and optimised soilless culture systems

The impostor anticipates the truth of the other

In this paper, we will elaborate on an article by H�l�ne Deutsch on the psychology of the impostor. The impostor is a specific type of liar who imposes on others dishonest stories about his identity. From a psychoanalytic point of view, identity is by definition fraudulent as there is no real Self. But the impostor duplicates this fraud by presenting dishonest stories about personal attainments, position, or worldly possessions. Referring to Freud?s text on ?Two lies told by children,? we will demonstrate that in the neurotic subject (a) the motive for lying is love, and (b) the purpose of lying is to deny symbolic castration in order to preserve an imaginary ideal. The impostor takes this one step further: here the motive is not love but admiration, and the purpose is not denial but disavowal of the symbolic castration. Finally, we will discuss the ambivalent relation of the public towards the impostor that seems all too willing to be deceived. In that sense, the lies of the impostor anticipate the Other?s truth about castration

The dread of living without anticipation: a case of melancholia

It seems that time functions essentially different in melancholia as compared to classical neuroses. We might even say the experience of time dissapears for the melancholicus. No future is anticipated, no past determines the actually lived distress, despair and guilt. This paper illustrates by means of a case study of a melancholic woman how anticipation is necessary for the subject to be able to live. Without desire for things to come, without a past that is experienced as something that anticipated the subject as it is now, there seems to be no more than an eternal now that stupifies the subject and blurs the distinction between death and living. The absence of the structuring function of time results in the experience of utter loneliness and anxiety and consequently also shows the dramatic impact of an absence of anticipation

The role of affect regulation in the treatment of people who have committed sexual offences

Affect regulation problems have been found to play an important role in the onset of problematic behavior, such as sexual abuse. The role of emotion and maladaptive coping has become relevant in both research and treatment interventions. Forensic treatments have been strongly influenced by conceptualizations of affect regulation that emphasize the control of emotional experience and expression. For a long time, emotions were treated as less important than cognition. However, the view of emotion as an adaptive resource and meaning system is now emerging in the forensic literature. General psychotherapy research has shown that improved affect regulation and deeper experiencing is associated with better outcomes in psychotherapy. These findings, in combination with the role of emotions in behavioral and relational functioning, are leading to a shift in forensic treatment approaches. In this paper, we review the literature on affect regulation in treatment programs for individuals who have committed sexual offences. The implications of this work for forensic practice will be considered. Finally, Emotion-Focused Therapy will be presented as a promising therapeutic approach for forensic treatment programs to promote clients' emotional engagement and processing, and to improve treatment outcomes

Improving access to and effectiveness of mental health care for personality disorders:the guideline-informed treatment for personality disorders (GIT-PD) initiative in the Netherlands

Evidence-based treatment for patients suffering from personality disorders (PDs) is only available to a limited extend in the Netherlands. Consequently, most patients receive non-manualized, unspecialized care. This manuscript describes the background, rationale and design of the Guideline-Informed Treatment for Personality Disorders (GIT-PD) initiative. GIT-PD aims to provide a simple, principle-driven, ‘common-factors’ framework for the treatment of PDs. The GIT-PD framework integrates scientific knowledge, professional expertise and patient experience to design a good-enough practice, based on common factors. It offers a basic framework including general principles, a structured clinical pathway, a basic professional stance, interventions focused on common factors, and team and organizational strategies, based on common features of evidence-based treatments and generic competences of professionals. The GIT-PD initiative has had a large impact on the organization of treatment for PDs in the Netherlands. For countries with an interest in improving their health care system for PDs, it could serve as a template that requires only limited resource

Efficient stochastic Hessian estimation for full waveform inversion

In this abstract we present a method that allows arbitrary elements of the approximate Hessian to be estimated simultaneously. Preliminary theoretical and numerical investigations suggest that the number of forward models required for this procedure does not increase with the number of shots. As the number of shots increases this means that the cost of estimating these approximate Hessian entries becomes negligible relative to the cost of calculating the gradient. The most obvious application would be to estimate the diagonal of the approximate hessian. This can then be used as a very inexpensive preconditioner for optimization procedures, such as the truncated Newton method

Critical State Flux Penetration and Linear Microwave Vortex Response in YBa_2Cu_3O_{7-x} Films

The vortex contribution to the dc field (H) dependent microwave surface impedance Z_s = R_s+iX_s of YBa_2Cu_3O_{7-x} thin films was measured using suspended patterned resonators. Z_s(H) is shown to be a direct measure of the flux density B(H) enabling a very precise test of models of flux penetration. Three regimes of field-dependent behavior were observed: (1) Initial flux penetration occurs on very low field scales H_i(4.2K) 100Oe, (2) At moderate fields the flux penetration into the virgin state is in excellent agreement with calculations based upon the field-induced Bean critical state for thin film geometry, parametrized by a field scale H_s(4.2K) J_c*d 0.5T, (3) for very high fields H >>H_s, the flux density is uniform and the measurements enable direct determination of vortex parameters such as pinning force constants \alpha_p and vortex viscosity \eta. However hysteresis loops are in disagreement with the thin film Bean model, and instead are governed by the low field scale H_i, rather than by H_s. Geometric barriers are insufficient to account for the observed results.Comment: 20 pages, LaTeX type, Uses REVTeX style files, Submitted to Physical Review B, 600 dpi PostScript file with high resolution figures available at http://sagar.physics.neu.edu/preprints.htm