Qualitative assessment of initial biofouling on fish nets used in marine cage aquaculture

A short communication which assesses the process of initial development of biofilms on nets used for fish culture in marine systems. Settlement follows a pattern of succession through conditioning, bacteria and diatoms with associated Extracellular Polymeric Substance (EPS) and other microscopic algae and fauna. Initial settlement appears to accelerate further settlement

Critical success factors and improvements in ISO 9000 maintenance / Roslina Ab Wahid and James Corner

The purpose of the ISO 9000 standards is to facilitate the multinational exchange of products and services by providing a clear set of quality systems requirements. It is also to assist organizations of all sectors and sizes to implement and operate an effective quality management system (QMS). The generic nature of the standards allows interested companies to determine the specifics of how the standards apply to its organization. Registration or certification to the standards demonstrates to customers that the supplying organization has achieved a basic level of quality assurance by the formalization and documentation of its quality management system. However, there is a lacking in the literature on the post-certification period as most of the published work focuses on how to obtain certification and the impact of certification on ISO 9000-certified companies. Thus, studies do not generally address what happens after the companies have obtained their certification

A data-driven classification of outcome behaviors in those who cause concern to British public figures

Fixated individuals pose a significant threat to public figures. Previous research compares individuals labeled ‘approachers’ to those labeled ‘communicators.’ Typically, such studies compare a number of risk factors among the two groups to identify significant differences. This has impactful implications for the threat assessment and management of the pathologically fixated. The present study builds upon this established body of work by considering if more nuance can be disaggregated from a universe of cases referred to the Fixated Threat Assessment Center (FTAC). FTAC is a joint police and mental health unit in the U.K. which applies a public health approach to managing the pathologically fixated. The present study takes a deductive approach to detect profiles of cases from the data. First, we use cluster analysis to detect unmeasured subgroups of concerning behavior in the case files of 2,118 referrals to FTAC. We identify 5 patterns of concerning behavior: incoherent offline communicators, incoherent online communicators, angry/abusive communicators, concerning approachers, and problematic approachers. Second, we examine the rate of diagnosed mental disorder, the nature of concerns evoked, and case management actions taken among each of the five profiles identified. We conclude by highlighting how our results could inform triaging large volumes of cases, the allocation of limited resources, and more generally, how the success of the FTAC model has relevance across the management of grievance-fueled violence in general. (PsycInfo Database Record (c) 2021 APA, all rights reserved

Predictors of varying levels of risks posed by fixated individuals to British public figures

Concerning approaches and communications to the Royal Family and other British public figures are relatively numerous. This paper examines over 2000 such cases logged over a three-year period in the United Kingdom. Using police and health data, the paper conducts a series of bivariate and multivariate analyses to demonstrate the predictors of what types of risk are posed by an individual case (e.g., communicate only, approach, security breach). The results showed that (a) the rates of serious mental disorders are higher among this sample than the general population base rate, (b) approachers were significantly more likely than communicators to suffer from serious mental disorders, (c) approachers were significantly more likely than communicators to have a history of substance use and abuse problems, (d) approachers were significantly more likely than communicators to have a history of violent behavior against property and persons, and (e) the motivations of approachers and communicators significantly differ. The paper concludes with a consideration of the implications for threat assessment and management

The impact of change readiness on the knowledge sharing process for professional service firms

Purpose– The study aims to assess the influence of change readiness on the knowledge sharing process. This study proposes that readiness for knowledge sharing involves developing holistic understanding of the process through identification of individual and organisational readiness. Design/methodology/approach– The study adopts a qualitative case study design involving three New Zealand professional service firms (PFSs).Using grounded theory analysis, categories and concepts of change readiness that shape the knowledge sharing process were identified. The linkages among these elements offer an explanation of how readiness for knowledge sharing is formed.Findings – Findings show that beliefs regarding knowledge sharing and individual expertise determine individual readiness to share knowledge. Readiness for the process is escalated by instilling collective commitment for knowledge sharing. A conducive organisational context, which comprises communication, participation and learning, represents a firm’s capability to implement the knowledge sharing process. Findings also highlight the moderating influences of firm archetype, inter-profession differences and knowledge nature in the interplay between change readiness elements and the knowledge sharing process.Research limitations/implications– Findings reveal elements that motivate readiness for knowledge sharing from a change perspective. The propositions and theoretical model offered could extend understanding of the phenomena and lead to further studies assessing readiness for other knowledge management processes. The study involves three PFSs; hence, interpretation of the findings is limited within the scope and context of the study. Practical implications– Findings contribute to the formulation of firms’ knowledge sharing strategies by offering holistic insights into the importance of motivating readiness for knowledge sharing through consideration of multidimensional change readiness: individual and collective beliefs, individuals’ characteristics and organisational context.Originality/value– It is the first empirical study that seeks to develop theory how change readiness elements influences knowledge sharing in the organisation. To offer more contextualized findings, the study focuses on the phenomena of change readiness and knowledge sharing within the professional service industry

Change readiness: Creating understanding and capability for the knowledge acquisition process

Purpose– This study aims to show how change readiness shapes the knowledge acquisition process. The study elicits change readiness factors, at the individual and firm levels, that influence the knowledge acquisition process and are based on the context of professional service firms.Design/methodology/approach – The qualitative study is grounded in interpretive philosophy and adopts a multiple-case study design. Three New Zealand Professional Service firms were analyzed for this study. Using grounded theory analysis, categories and concepts of change readiness that shape knowledge acquisition were identified.Findings– Knowledge acquisition understanding, knowledge acquisition context and individual differences, represent primary dimensions defining change readiness for the knowledge acquisition process. Finally, distinctive firm archetypes, inter-profession differences and professionals’ demography, affect the way change readiness elements shape the knowledge acquisition process in the firms studied.Research limitations/implications – The study develops a theoretical model that shows how elements of change readiness, at the individual and organizational levels, influence knowledge acquisition. The study offers several propositions that could be tested in future studies. The study involves three professional service firms; hence, interpretation of the findings is limited.Practical implications – A holistic understanding of change readiness factors that influence knowledge acquisition could mitigate failures of knowledge management processes in organizations.Originality/value – It is the first empirical study that seeks to develop a theory on how change readiness elements influence knowledge acquisitions in the organization.To offer more contextualized findings, the study is done within the professional service industry

Measurement of the decay of laser-driven linear plasma wakefields

We present measurements of the temporal decay rate of one-dimensional (1D), linear Langmuir waves excited by an ultrashort laser pulse. Langmuir waves with relative amplitudes of approximately 6% were driven by 1.7J, 50 fs laser pulses in hydrogen and deuterium plasmas of density ne0 = 8.4 × 1017 cm−3. The wakefield lifetimes were measured to be τH2wf = (9 ± 2) ps and τ D2wf = (16 ± 8) ps, respectively, for hydrogen and deuterium. The experimental results were found to be in good agreement with 2D particle-in-cell simulations. In addition to being of fundamental interest, these results are particularly relevant to the development of laser wakefield accelerators and wakefield acceleration schemes using multiple pulses, such as multipulse laser wakefield accelerators

Resonant excitation of plasma waves in a plasma channel

We demonstrate resonant excitation of a plasma wave by a train of short laser pulses guided in a preformed plasma channel, for parameters relevant to a plasma-modulated plasma accelerator (P-MoPA). We show experimentally that a train of N≈10 short pulses, of total energy ∼1J, can be guided through 110mm long plasma channels with on-axis densities in the range 1017-1018cm-3. The spectrum of the transmitted train is found to be strongly red shifted when the plasma period is tuned to the intratrain pulse spacing. Numerical simulations are found to be in excellent agreement with the measurements and indicate that the resonantly excited plasma waves have an amplitude in the range 3-10GVm-1, corresponding to an accelerator stage energy gain of order 1GeV