Data on laser induced preferential crystal (re)orientation by picosecond laser ablation of zinc in air.

Laser ablation of zinc is performed with a 6.7 ps pulsed laser source to investigate the ablation mechanism and resulting morphology of the irradiated surface. The data shows the changes in crater morphology, as well as chemical composition, for different number of pulses and laser fluence levels. We observed Laser Induced Preferential Crystal Orientation (LIPCO), as a result of ultra-short pulsed laser processing of Zn at a wavelength of 515 nm. Crystallographic data for other laser wavelengths, namely 343 and 1030 nm, as well as for Zn coated steel are also provided in support of this observation. Data presented in this article are related to the research article "Investigation of the ultrashort pulsed laser processing of zinc at 515 nm: morphology, crystallography and ablation threshold" [1].

Model based optimization of process parameters to produce large homogeneous areas of laser-induced periodic surface structures.

A model is presented, which allows to predict the (in)homogeneity of large areas covered with Laser-induced Periodic Surface Structures (LIPSS), based on the laser processing parameters (peak laser fluence and geometrical pulse-to-pulse overlap) and experimentally determined material properties. As such, the model allows to establish optimal processing conditions, given the material properties of the substrate to be processed. The model is experimentally validated over a large range of geometrical pulse-to-pulse overlap values and fluence levels on silicon using a picosecond laser source.

Morphology of single picosecond pulse subsurface laser-induced modifications of sapphire and subsequent selective etching.

The effect of 1030nm single picosecond pulsed laser-induced modification of the bulk of crystalline sapphire using a combined process of laser amorphization and selective wet chemical etching is studied. Pulse durations of more than 1 picosecond are not commonly used for this subsurface process. We examine the effect of 7 picosecond pulses on the morphology of the unetched, as well as etched, single pulse modifications, showing the variation of shape and size when varying the pulse energy and the depth of processing. In addition, a qualitative analysis of the material transformation after irradiation is provided as well as an analysis of cracking phenomena. Finally, a calculated laser intensity profile inside sapphire, using the Point Spread Function (PSF), is compared to the shape of the modifications. This comparison is employed to calculate the intensity threshold leading to amorphization, which equals 2.5⋅1014 ± 0.4⋅1014 W/cm2.

Picosecond-pulsed laser ablation of zinc: crater morphology and comparison of methods to determine ablation threshold.

Ablation of bulk polycrystalline zinc in air is performed with single and multiple picosecond laser pulses at a wavelength of 1030 nm. The relationships between the characteristics of the ablated craters and the processing parameters are analyzed. Morphological changes of the ablated craters are characterized by means of scanning electron microscopy and confocal laser scanning microscopy. Chemical compositions of both the treated and untreated surfaces are quantified with X-ray photoelectron spectroscopy. A comparative analysis on the determination of the ablation threshold using three methods, based on ablated diameter, depth and volume is presented along with associated incubation coefficients. The single pulse ablation threshold value is found to equal 0.21 J/cm2. Using the calculated incubation coefficients, it is found that both the fluence threshold and energy penetration depth show lesser degree of incubation for multiple laser pulses.

Early detection and integrated care for adolescents and young adults with psychotic disorders: the ACCESS III study.

OBJECTIVE: The objective of the study was to investigate whether a combined intervention composed of early detection plus integrated care (EDIC) enhances outcomes in patients with early psychosis compared to standard care (SC). METHODS: ACCESS III is a prospective non-randomized historical control design 1-year study examining the efficacy of EDIC (n = 120) vs. SC (n = 105) in patients aged 12-29 years. Primary outcome was the rate of ≥6 months combined symptomatic and functional remission. Additional outcomes comprised the reduction of DUP and course of psychopathology, functioning, quality of life, and satisfaction with care. RESULTS: In observed cases, 48.9% in the EDIC and 15.2% in the SC group reached the primary endpoint. Remission was predicted by EDIC (OR = 6.8, CI: 3.15-14.53, P < 0.001); younger age predicted non-remission (OR = 1.1, CI: 1.01-1.19, P = 0.038). Linear regressions indicated a reduction of DUP in EDIC (P < 0.001), but not in SC (P = 0.41). MMRMs showed significantly larger improvements in PANSS positive (P < 0.001) and GAF (P < 0.01) scores in EDIC vs. SC, and in EDIC over time in CGI-Severity (P < 0.001) and numerically in Q-LES-Q-18 (P = 0.052). CONCLUSIONS: EDIC lead to significantly higher proportions of patients achieving combined remission. Moderating variables included a reduction of DUP and EDIC, offering psychotherapeutic interventions.

[Coping and depression in underage children of cancer patients: Data on the course]. / Coping und depressive Belastungen minderjähriger Kinder von Krebspatienten : Verlaufsdaten.

BACKGROUND: There is increasing consideration of a family-focused perspective of the psychosocial consequences of cancer. OBJECTIVES: This study examined the psychosocial situation of children and adolescents (11 to 17 years old) of cancer patients assessing their psychological distress and coping over time. METHODS: A total of 110 children and adolescents were assessed post-treatment of parents with cancer (t1), 6 (t2) and 12 months (t3) after t1. Participants completed validated questionnaires assessing coping (KidCope) and depressive symptoms (CES). These data were compared with a matched sample from the general population. RESULTS: The children reported using a combination of coping measures. In particular, active coping was perceived as being helpful. In terms of coping, there were only small gender differences and 6 months after completion of treatment of the parents (t2), depressive symptoms of the children were still elevated. Depression diminished over time and was near the level of the comparison group at t3. CONCLUSION: Children and adolescents are particularly psychologically distressed after cancer treatment of parents. This distress was connected with not helpful coping strategies. The extended adjustment of children/adolescents of cancer patients has to be considered in the clinical and psychosocial care of the families.

Two-photon-induced internal modification of silicon by erbium-doped fiber laser.

Three-dimensional bulk modification of dielectric materials by multiphoton absorption of laser pulses is a well-established technology. The use of multiphoton absorption to machine bulk silicon has been investigated by a number of authors using femtosecond laser sources. However, no modifications confined in bulk silicon, induced by multiphoton absorption, have been reported so far. Based on results from numerical simulations, we employed an erbium-doped fiber laser operating at a relatively long pulse duration of 3.5 nanoseconds and a wavelength of 1549 nm for this process. We found that these laser parameters are suitable to produce modifications at various depths inside crystalline silicon.

Annealing of SnO2 thin films by ultra-short laser pulses.

Post-deposition annealing by ultra-short laser pulses can modify the optical properties of SnO2 thin films by means of thermal processing. Industrial grade SnO2 films exhibited improved optical properties after picosecond laser irradiation, at the expense of a slightly increased sheet resistance [Proc. SPIE 8826, 88260I (2013)]. The figure of merit ϕ = T¹° / R(sh) was increased up to 59% after laser processing. In this paper we study and discuss the causes of this improvement at the atomic scale, which explain the observed decrease of conductivity as well as the observed changes in the refractive index n and extinction coefficient k. It was concluded that the absorbed laser energy affected the optoelectronic properties preferentially in the top 100-200 nm region of the films by several mechanisms, including the modification of the stoichiometry, a slight desorption of dopant atoms (F), adsorption of hydrogen atoms from the atmosphere and the introduction of laser-induced defects, which affect the strain of the film.

Pulse-analysis-pulse investigation of femtosecond laser-induced periodic surface structures on silicon in air.

A new approach to experimentally investigate laser-induced periodic surface structures (LIPSSs) is introduced. Silicon was iteratively exposed to femtosecond laser pulses at λ = 800 nm and normal incidence in ambient air and at a fluence slightly over the single-pulse modification threshold. After each laser pulse, the topography of the surface was inspected by confocal microscopy. Subsequently, the sample was reproducibly repositioned in the laser setup, to be exposed to the next laser pulse. By this approach, the initiation and spatial evolution ("growth") of the LIPSSs were analyzed as function of the number of pulses applied. It was found that, after the first laser pulses, the ridges of the LIPSSs elevate, and valleys between the ridges deepen, by a few tens of nanometers relative to the initial surface. An electromagnetic model, discussed in earlier works, predicted that the spatial periodicity of LIPSSs decreases with the number of laser pulses applied. This implies material transport and reorganization of the irradiated material on the surface, due to each laser pulse. However, our experiments show a negligible shift of the lateral positions of the LIPSSs on the surface.

[Parents with cancer and their minor children--a nationwide survey of outpatient psychosocial cancer counselling service regarding needs and its utilisation]. / Krebskranke Eltern und ihre minderjährigen Kinder--eine bundesweite Befragung ambulanter psychosozialer Krebsberatungsstellen zu Bedarf und Inanspruchnahme.

OBJECTIVES: Children of cancer patients have an increased risk for developing emotional problems. While psychosocial cancer counselling services are available all over the country, it is unclear if parents seek for help and if specific approaches for families are offered. METHODS: A survey was made of outpatient cancer counselling services in Germany (n=228). The response rate was 56%. Descriptive and content analyses of the data have been used. RESULTS: Providers estimate that 55% of their patients are between 18 and 55 years with 18% of them having minor children. However, only 53% do regularly ask their patients if they have minor children. Family- or child-settings are not provided regularly. Over 60% of providers would welcome special courses on this subject. CONCLUSION: Although psychosocial care of minor children is mentioned in outpatient psychosocial cancer counselling guidelines, children are not included regularly. A stronger emphasis on this topic in further education has to be made.

Laser-induced nanoscale superhydrophobic structures on metal surfaces.

The combination of a dual-scale (nano and micro) roughness with an inherent low-surface energy coating material is an essential factor for the development of superhydrophobic surfaces. Ultrashort pulse laser (USPL) machining/structuring is a promising technique for obtaining the dual-scale roughness. Sheets of stainless steel (AISI 304 L SS) and Ti-6Al-4V alloys were laser-machined with ultraviolet laser pulses of 6.7 ps, with different numbers of pulses per irradiated area. The surface energy of the laser-machined samples was reduced via application of a layer of perfluorinated octyltrichlorosilane (FOTS). The influence of the number of pulses per irradiated area on the geometry of the nanostructure and the wetting properties of the laser-machined structures has been studied. The results show that with an increasing number of pulses per irradiated area, the nanoscale structures tend to become predominantly microscale. The top surface of the microscale structures is seen covered with nanoscale protrusions that are most pronounced in Ti-6Al-4V. The laser-machined Ti-6Al-4V surface attained superhydrophobicity, and the improvement in the contact angle was >27% when compared to that of a nontextured surface.

Neuropsychological dysfunction, depression, physical disability, and coping processes in families with a parent affected by multiple sclerosis.

BACKGROUND: Families with a parent suffering from multiple sclerosis (MS) must cope with the unpredictable course of the disease. Most studies analyzing factors that influence coping abilities in families with a member affected with MS used questionnaires to assess this ability. METHODS: On the contrary, the present study used a semi-structured psychiatric interview and used the resulting information to calculate a general measure of coping ability (coping index [CI]). We administered this interview to 44 MS patients, their partners and offspring and conducted a neuropsychological and physical evaluation of the patients to determine the impact of physical disability, cognitive dysfunction, and depression on the process of coping by the patient, the healthy partner, and children. RESULTS: The CI of patients was best predicted by measures of their depressive symptoms, divided attention, and estimated verbal intelligence. None of the patient variables predicted the CI of healthy partners or their offspring. We found an association between the CI of the healthy partner and the children. CONCLUSIONS: These findings suggest that MS patients' emotional and neuropsychological functions are associated with their ability to cope with the disease. These should be carefully assessed at the beginning of treatment so that those factors known to negatively influence patient coping are targeted in the treatment plan if necessary. Comprehensive care of a patient with MS should include support of coping abilities of the family members.

Adolescent's stress responses and psychological functioning when a parent has early breast cancer.

OBJECTIVE: To identify factors associated with psychological functioning in adolescent children of early-stage breast cancer patients. METHOD: Adolescents' self-reported psychological functioning using the Child Behaviour Checklist (YSR), Mental Health subscale of the Child Health Questionnaire (CHQ-MH) and Child Impact of Events (C-IES) scale. The Family Assessment Device (FAD) and the Family Environment Scale (FES cohesion subscale) assessed family functioning. Maternal depression was assessed on the Beck Depression Inventory (BDI) and quality of life using the SF8. Using a cross-sectional within-groups design, assessments were obtained for 56 adolescents of 11-17 years . RESULTS: High rates of stress were found (C-IES) in 33% males and 45% females. Thirty percent of adolescents reported psychological problems (YSR) (28% males and 32% females) when compared with published norms. Poor family functioning was linked with YSR internalising and externalising problems; poor family cohesion with higher externalising and total YSR psychological problems. Maternal depression was linked with adolescent-reported internalising problems. CONCLUSIONS: When mothers have breast cancer, a substantial minority of their adolescent children have psychological and stress response-related problems linked with poor family functioning. These results argue in favour of a family-oriented approach to psychological support of breast cancer patients.

Cancer families with children: factors associated with family functioning--a comparative study in Finland.

OBJECTIVE: The objective is to examine the factors associated with family functioning in families with children where a parent has cancer in comparison to families without cancer. SAMPLE AND METHODS: Eighty-five families including 85 cancer patients, 61 healthy spouses and 68 children between 11 and 17 years of age, and a control group of 59 families including 105 adults and 65 children were given a set of questionnaires including a background variable questionnaire, the Family Assessment Device, the Beck Depression Inventory and the Sense of Coherence (SOC). A statistical multilevel model allowing the use of data from several informants belonging to the same family was constructed for the analysis of associations between variables. RESULTS: Maternal depression and SOC of family members were associated with family functioning; maternal depression impaired family functioning and family members' SOC improved it. No difference was found between the clinical group and the control group. CONCLUSION: In clinical work with cancer families with children, maternal depression and SOC should be focused on.

Factors associated with the mental health of adolescents when a parent has cancer.

This study explored factors associated with the mental health in adolescents (ages 11-17; n = 54) within 12 months after a parent had been diagnosed with cancer. A control group was included (ages 11-17; n = 49). A demographic questionnaire, the SF-8 Health Survey, the Youth Self Report and the McMaster Family Assessment Device were used. Similar levels of psychological distress and healthy family functioning were reported in the clinical and the control group. No effect of gender of the ill parent and that of the adolescent was found. A negative correlation was found between the physical health of the ill parent and the mental health of the adolescent. Healthy family functioning correlated with less psychological distress in adolescents with a parent with cancer. Open communication, flexible problem solving and appropriate affective involvement were significant predictors for less psychological distress in the adolescents. The study concludes that a healthy family functioning facilitated the adolescent's adjustment to parental cancer.

Disease variables and depression affecting the process of coping in families with a somatically ill parent.

AIM AND METHODS: Based on the investigation of 134 families with a seriously ill parent and 214 offspring, we compared--by means of semistructured psychiatric interviews--the capacity of the ill and the healthy parent and their children to cope with various diseases. We evaluated how disease characteristics such as duration and severity of the disease (assessed by the Karnofsky Index) and associated depression [measured by the Beck Depression Inventory for parents and the Depression Inventory for Children and Adolescents (Depressions-Inventar für Kinder und Jugendliche) for children] influence the coping capacity of all family members. RESULTS: The coping capacity of patients with organic disease (cancer, multiple sclerosis, other somatic diseases) is significantly higher than that of patients with somatization disorder, whereas the depression score of patients with organic disease is significantly lower than that of patients with somatization disorders. The depression of the patient negatively influences his/her coping capacity. Children's coping capacity does not differ with respect to the parental illness and is not influenced by their own depression. There are significant correlations between the coping capacity of children and their healthy and ill parents affected by organic disease (multiple sclerosis, other somatic diseases, cancer), but not between children and healthy and ill parents with somatization disorders. Multivariate regression analysis shows the mutual influence of coping capacities between the parental couple as well as between the parents and their children. The better the patient (partner) is able to cope with a severe disease, the higher are the values of the coping capacity of the partner (patient). Children older than 6 years with a severely ill, nondepressed and well-coping parent cope well. These results do not apply to parents with somatization disorders. CONCLUSIONS: Patients with organic disease cope better and are less depressed, whereas patients with somatization disorders have a lower coping capacity and a higher depression score. Children older than six years cope better. Comprehensive care of a patient with a severe illness has to include his/her family in order to evaluate coping capacities of all family members, particularly of small children, and to assess and treat associated parental depression.

Phosphorylation of Helicobacter pylori CagA by c-Abl leads to cell motility.

Helicobacter pylori induces a strong motogenic response in infected gastric epithelial host cells, which is enhanced by translocation of the pathogenic factor cytotoxin-associated gene A (CagA) into host cells via a specialized type IV secretion system. Once injected into the cytosol CagA is rapidly tyrosine phosphorylated by Src family kinases followed by Src inactivation. Hence, it remained unknown why CagA is constantly phosphorylated in sustained H. pylori infections to induce cell migration, whereas other substrates of Src kinases are dephosphorylated. Here, we identify the non-receptor tyrosine kinase c-Abl as a crucial mediator of H. pylori-induced migration and novel CagA kinase in epithelial cells. Upon H. pylori infection c-Abl directly interacts with CagA and localizes in focal adhesion complexes and membrane ruffles, which are highly dynamic cytoskeletal structures necessary for cell motility. Selective inhibition of c-Abl kinase activity by STI571 or shRNA abrogates sustained CagA phosphorylation and epithelial cell migration, indicating a pivotal role of c-Abl in H. pylori infection and pathogenicity. These results implicate c-Abl as a novel molecular target for therapeutic intervention in H. pylori-related gastric diseases.

Factors associated with emotional and behavioural problems among school age children of breast cancer patients.

To identify factors linked with emotional and behavioural problems in school age (6- to 17-year-old) children of women with breast cancer. Reports of children's emotional and behavioural problems were obtained from patient mothers, their healthy partners, the children's teacher and adolescents using the Child Behaviour Checklist and Mental Health subscale of the Child Health Questionnaire. Parents reported on their own level of depression and, for patients only, their quality of life. Family functioning was assessed using the Family Assessment Device and Cohesion subscale of the Family Environment Scale. Using a cross-sectional within groups design, assessments were obtained (N=107 families) where the patients were 3-36 months postdiagnosis. Risk of problems in children were linked with low levels of family cohesion, low affective responsiveness and parental over-involvement as reported by both child and mother. Adolescents reported family communication issues, which were associated with externalising behaviour problems. Maternal depression was related to child internalising problems, particularly in girls. Whether the mother was currently on or off chemotherapy was not associated with child problems nor was time since cancer diagnosis. These findings held across child age. Where mothers have early stage breast cancer, a substantial minority of their school-aged children have emotional and behavioural problems. Such cases are characterised by the existence of maternal depression and poor family communication, rather than by the mother's treatment status or time since diagnosis. Targeted treatments, which focus on maternal depression and family communication may benefit the children and, through improved relationships, enhance the patients' quality of life.

An unusual presentation of giant cell arteritis.

A 77-year-old-man with giant cell arteritis who developed bitemporal scalp ulcerations is described. Since 1946 when Cooke et al. reported the first case of scalp necrosis there were approximately 55 cases published. Scalp ulceration is a rare complication of giant cell arteritis and occurs mainly in elderly persons, particularly women. About half of all patients were presented to dermatologists. Most of the patients (70%) had other serious complications of giant cell arteritis: blindness, gangrene of the tongue and nasal septum necrosis. Seventy percent of the cases were confirmed by a temporal artery biopsy. The necrosis were of varying extent and uni- or bilateral. Although, in most cases necrosis has been located bilaterally as in the presented case. Scalp healing was complete nearly in all patients by conservative treatment within a year. Scalp ulceration is a potentially reversible complication of giant cell arteritis which indicates extensive vessel involvement and adequate coricosteroid therapy is required and essential.