Software process improvement in a medium-sized company

For many organisations, software is a crucial component of their business as it provides a competitive advantage over other organisations. Hence, they are very keen to ensure that the software they employ is not only reliable and defect-free, but also cost-effective to produce and maintain. That is, organisations desire the highest quality of software, but at a minimum cost and time. Research into software engineering has shown that by improving software development or maintenance processes, there can be an improvement to the software quality. This thesis describes how software process improvement has been implemented in a medium-sized company where software is used to automate manufacturing processes. Prior to this study, there had not been any form of software process improvement in the company, although they followed company standards and procedures that have been in place for over a decade. The aim of this study is to use software development and maintenance projects in the company as cases for process improvement initiatives. Each case provides evidence in support of a hypothesis that is associated with it. For each case study, the problem is assessed, a diagnosis has been researched and actions have been taken based on that research. Each hypothesis is evaluated at the end of the thesis followed by conclusions of the whole research. The principle outcome of this research is that software practices of a medium-sized company can be improved using small-scale software process improvement. Using the CMM as a guide, software process initiatives were implemented to address specific areas of software engineering, i.e. maintenance, testing, planning and control, requirements management, and testing. Efforts have been made to raise the company's maturity in the CMM with respect to these areas. Collectively, the case studies achieve improvement of software practices by way of applying software process improvement in a systematic manner - in this case the IDEAL framework from the CMM

A micro-mechanically based continuum model for strain-induced crystallization in natural rubber

AbstractRecent experimental results show that strain-induced crystallization can substantially improve the crack growth resistance of natural rubber. While this might suggest superior designs of tires or other industrial applications where elastomers are used, a more thorough understanding of the underlying physics of strain-induced crystallization in natural rubber has to be developed before any design process can be started. The objective of this work is to develop a computationally-accessible micro-mechanically based continuum model, which is able to predict the macroscopic behavior of strain crystallizing natural rubber. While several researchers have developed micro-mechanical models of partially crystallized polymer chains, their results mainly give qualitative agreement with experimental data due to a lack of good micro–macro transition theories or the lack of computational power. However, recent developments in multiscale modeling in polymers give us new tools to continue this early work. To begin with, a micro-mechanical model of a constrained partially crystallized polymer chain with an extend-chain crystal is derived and connected to the macroscopic level using the non-affine micro-sphere model. Subsequently, a description of the crystallization kinetics is introduced using an evolution law based on the gradient of the macroscopic free energy function (chemical potential) and a simple threshold function. Finally a numerical implementation of the model is proposed and its predictive performance assessed using published data

Effect of microneedling by dermaroller on acne scars: an observational study at tertiary care hospital

Background: Post acne facial scar is very distressing phenomenon. There are many treatment options like laser resurfacing, dermabrasion, microdermabrasion and non-ablative laser resurfacing but it may cause adverse effects and interference with the daily activities of the patient. Microneedling or dermaroller therapy is newer modality in management of acne scars with satisfactory improvement and no significant side effect. Objective of our study was to evaluate efficacy and safety of microneedling in the treatment of atrophic facial acne scars. Methods: Twenty-eight patients of Fitzpatrick skin type IV to V having atrophic facial acne scars and fulfilling inclusion criteria were treated with multiple sittings of microneedling (dermaroller) treatment at monthly interval. Goodman and Baron’s qualitative and quantitative acne scar grading system was used for assessment. Patients were evaluated clinically and by serial photography. Presence of any active infection, active acne, wounds, blisters, keloids, taking some medications like Accutane, antihypertensives, anticoagulants, systemic retinoids, topical retinoids, those undergoing cosmetic procedures, treatment with injecting fillers or ablative or non-ablative laser resurfacing, diabetes, collagen diseases and those who do not agree to participate in study were excluded. Results: Any change in the grading of scars after the end of treatment and follow-up period was noted. Efficacy and improvement of dermaroller treatment was assessed by Goodman and Baron’s global acne scarring system. Out of 18 patients (of total 28) with Goodman and Baron’s qualitative grade-4, 16 (88.90%) patients reduced to grade-1. 21 out of 28 patients achieved ‘excellent’ response. Adverse effects were limited to transient erythema and post inflammatory hyperpigmentation. Conclusions: Microneedling therapy seems to be simple, safe and efficacious for the management of atrophic facial acne scars

Left and right ventricular longitudinal strain-volume/area relationships in elite athletes.

We propose a novel ultrasound approach with the primary aim of establishing the temporal relationship of structure and function in athletes of varying sporting demographics. 92 male athletes were studied [Group IA, (low static-low dynamic) (n = 20); Group IC, (low static-high dynamic) (n = 25); Group IIIA, (high static-low dynamic) (n = 21); Group IIIC, (high static-high dynamic) (n = 26)]. Conventional echocardiography of both the left ventricles (LV) and right ventricles (RV) was undertaken. An assessment of simultaneous longitudinal strain and LV volume/RV area was provided. Data was presented as derived strain for % end diastolic volume/area. Athletes in group IC and IIIC had larger LV end diastolic volumes compared to athletes in groups IA and IIIA (50 ± 6 and 54 ± 8 ml/(m(2))(1.5) versus 42 ± 7 and 43 ± 2 ml/(m(2))(1.5) respectively). Group IIIC also had significantly larger mean wall thickness (MWT) compared to all groups. Athletes from group IIIC required greater longitudinal strain for any given % volume which correlated to MWT (r = 0.4, p < 0.0001). Findings were similar in the RV with the exception that group IIIC athletes required lower strain for any given % area. There are physiological differences between athletes with the largest LV and RV in athletes from group IIIC. These athletes also have greater resting longitudinal contribution to volume change in the LV which, in part, is related to an increased wall thickness. A lower longitudinal contribution to area change in the RV is also apparent in these athletes

Acute otitis externa: Consensus definition, diagnostic criteria and core outcome set development.

OBJECTIVE: Evidence for the management of acute otitis externa (AOE) is limited, with unclear diagnostic criteria and variably reported outcome measures that may not reflect key stakeholder priorities. We aimed to develop 1) a definition, 2) diagnostic criteria and 3) a core outcome set (COS) for AOE. STUDY DESIGN: COS development according to Core Outcome Measures in Effectiveness Trials (COMET) methodology and parallel consensus selection of diagnostic criteria/definition. SETTING: Stakeholders from the United Kingdom. SUBJECTS AND METHODS: Comprehensive literature review identified candidate items for the COS, definition and diagnostic criteria. Nine individuals with past AOE generated further patient-centred candidate items. Candidate items were rated for importance by patient and professional (ENT doctors, general practitioners, microbiologists, nurses, audiologists) stakeholders in a three-round online Delphi exercise. Consensus items were grouped to form the COS, diagnostic criteria, and definition. RESULTS: Candidate COS items from patients (n = 28) and literature (n = 25) were deduplicated and amalgamated to a final candidate list (n = 46). Patients emphasised quality-of-life and the impact on daily activities/work. Via the Delphi process, stakeholders agreed on 31 candidate items. The final COS covered six outcomes: pain; disease severity; impact on quality-of-life and daily activities; patient satisfaction; treatment-related outcome; and microbiology. 14 candidate diagnostic criteria were identified, 8 reaching inclusion consensus. The final definition for AOE was 'diffuse inflammation of the ear canal skin of less than 6 weeks duration'. CONCLUSION: The development and adoption of a consensus definition, diagnostic criteria and a COS will help to standardise future research in AOE, facilitating meta-analysis. Consulting former patients throughout development highlighted deficiencies in the outcomes adopted previously, in particular concerning the impact of AOE on daily life

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead