Search

As a percentage of the total global energy supply, wind energy facilities could provide 10% of the total global energy supply by 2050 as reported in IEA World Energy Outlook (2022). Considering this, a just transition to renewable and sustainable energy in South Africa is a genuine possibility if steps are taken immediately to achieve this. The Eastern Cape Province exhibits a strong wind resource which can be exploited towards expediting such a just energy transition. No research and related modelling have, to date, been undertaken in quantifying and relating the detailed P50 energy yield analyses of representative wind energy facilities in temporal and spatial dimensions to the occurrence of specific synoptic types in South Africa. To quantify this energy meteorology climatology for a suitably sized geospatial area in the Eastern Cape Province of South Africa (spatial focus area, latitude −30 to −35, longitude 20 to 30), the approach of using self-organising maps is proposed. These maps are used to identify the most common synoptic circulation types occurring in the Eastern Cape and can subsequently be mapped onto an equivalent time resolution wind energy production timeseries calculated based on probable wind energy facility sites. This paper describes comprehensive methodologies used to model the wind energy facilities, calculate with high confidence the P50 energy production, and then identify the predominant synoptic weather types responsible for the wind energy production in this spatial focus area. After quantifying the energy production, running a self-organising map software generates a purposely selected 35 node map that characterises archetypal synoptic patterns over the 10-year period. The synoptic types can be ranked by the highest energy production. It is shown that in this spatial area, monthly wind energy production is higher during the winter months. When the well-established high-pressure cells move northward, synoptic types associated with higher energy production are frequent and include tropical and temperate disturbances across South Africa, patterns resembling a ridging anticyclone off the west coast of South Africa and low-pressure cells occurring to the north and south. Low energy producing patterns show characteristics of the high-pressure cells moving southwards producing fine weather and mildly disturbed conditions. The purpose of this methodology is that it provides the foundation required to derive long-term frequency changes of these synoptic weather systems using global climate model ensembles and thus changes in wind energy production. [ABSTRACT FROM AUTHOR]

Significance: South Africa is wrestling with increasing climate change impacts and how to respond. The 2022 IPCC Working Group II Report synthesises the latest evidence on climate change impacts, vulnerability and adaptation, and what this means for climate-resilient development. In this commentary, South African authors on the Report reflect on its key findings and the implications for the country. The commentary highlights challenges and opportunities for cities, the food-water-energy-nature nexus, knowledge and capacity strengthening (which includes climate services, climate change literacy, and indigenous and local knowledge), climate finance, equity, justice and social protection, and climate-resilient development pathways. The piece closes with a reflection on research gaps requiring attention and the importance of urgently ramping up climate action to secure a liveable future for all South Africans. [ABSTRACT FROM AUTHOR]

Fingermark deposits are left on surfaces touched with the bare hands, and these traces can be exploited as potential evidence. While many methods exist for the detection of fingermarks on common substrates, significant ongoing research is being directed at improved sensitivity via new approaches or the optimization of existing methods. Research is also being directed at obtaining a more fundamental understanding of fingermark residues, their physical and chemical properties, and how they behave on various substrates over time. The aim is to improve detection success rates to increase the chance of developing and recording potentially identifiable fingermarks in any given situation. The fingerprint identification process – where recorded fingermarks are compared against known fingerprints to determine if there is a common source – has come under increased scrutiny over the last 15 years, particularly with respect to the perceived lack of fundamental research and the subjective nature of current practices. Related research is being pursued by a number of research groups around the world. The International Fingerprint Research Group (IFRG) holds biennial meetings to discuss current research related to fingermark evidence. This article summarizes the fingermark detection and identification research presented at the 2015 and 2017 meetings of this group. [ABSTRACT FROM AUTHOR]

Environmental forensic investigations can be complex because pollutants are often not visible, making it difficult to determine the types of pollutants and their source. Emergency scenarios require immediate action to protect environmental and/or human health, and having limited knowledge of these pollutants makes this complicated. Recent advancements in field-portable instrumentation pave the way for rapid on-site analyses for real-time monitoring of hazardous compounds at incident sites, thereby providing valuable intelligence to direct subsequent actions. Fires can pose significant risk to human and/or environmental health through the release of hazardous compounds in smoke or run-off water from firefighting activities. Monitoring the release of hazardous organic compounds from fires typically requires complex sampling and laboratory-based protocols. Results from such protocols are not immediately available to first responders. Site risk assessment and management would therefore benefit from accurate in-field identification of the release of hazardous organic compounds. A portable Gas Chromatograph - Mass Spectrometer (GC-MS) was evaluated for the identification of hazardous organic compounds in air and water samples at fire scenes. Preliminary results demonstrated that deployment of such instrumentation has the potential to provide first responders with a rapid on-site assessment tool, allowing for more proactive protection of environmental and human health. [ABSTRACT FROM AUTHOR]

This article describes the role of nurses assisting people with degenerative illness in advance care planning (ACP) for a time when they may lose decision-making capacity. It looks at the concept of advance decisions to refuse treatment (ADRT), as defined in the Mental Capacity Act 2005, exploring the legal, ethical and philosophical ramifications of carrying out, or overriding, formerly expressed wishes of someone who has subsequently lost decision-making capacity. It uses an illustrative composite case study of an individual with Huntington's disease whose prognosis includes future deterioration in swallowing, together with consideration of whether to have or refuse a percutaneous endoscopic gastrostomy. The author, who as part of his role cares for people with neurodegenerative conditions, including Huntington's disease, discusses the difficulties and dilemmas that nurses experience with ADRTs, drawing on personal experience. He suggests that, rather than focusing on ADRTs, ACP may be most effective in preparing people and their surrogates to make real-time decisions, based on a shared understanding of the individual's values. [ABSTRACT FROM AUTHOR]

The ability to detect and identify substances based on the volatile compounds (odors) they emit is relied upon heavily for numerous investigative purposes. Animals have an innate olfactory sensitivity and selectivity that out-performs current instrumentation. This has led to immense interest in their employment as chemical sensors for a range of applications, including forensic science, both as whole organisms and as sensing elements in biosensors. Using electrophysiological and calcium imaging assays, this research examined the response of Drosophila melanogaster olfactory receptors (ORs) to odor compounds significant in forensic science and assessed their potential utility as volatile compound sensors. This investigation illustrated the different sensitivities, selectivities, and sensing features of individual ORs and demonstrated that their employment for detection purposes is feasible. While further research expanding on this study will be required to demonstrate the performance characteristics that an OR-based detection system will ultimately possess, this research provides an encouraging first step towards the goal of utilizing isolated biological ORs as volatile compound sensors in forensic science. [ABSTRACT FROM AUTHOR]

A Pyrolysis – Gas Chromatography – Mass Spectrometry (Py-GC-MS) method was developed for the analysis and profiling of crude and heavy fuel oil asphaltenes, for application in oil fingerprinting. Asphaltenes were precipitated from ten geographically different oils usingn-pentane, and analysed by Py-GC-MS. Alkane profiles and sulphur/aromatic profiles were used to compare the oils, and to correctly differentiate oils from different geographical regions. Py-GC-MS could not differentiate a weathered oil sample and a fresh oil sample from the same source. The results of this study support the findings from a previously developed FTIR method for asphaltene profiling. [ABSTRACT FROM PUBLISHER]

A proof-of-concept spectroscopic method for crude and heavy fuel oil asphaltenes was developed to complement existing methods for source determination of oil spills. Current methods rely on the analysis of the volatile fraction of oils by Gas Chromatography (GC), whilst the non-volatile fraction, including asphaltenes, is discarded. By discarding the non-volatile fraction, important oil fingerprinting information is potentially lost. Ten oil samples representing various geographical regions were used in this study. The asphaltene fraction was precipitated from the oils using excess n-pentane, and analysed by Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR). Based on visual interpretation of FTIR spectra along with peak height ratio comparisons, all ten oil samples could be differentiated from one another. Furthermore, ATR-FTIR was not able to differentiate a weathered crude oil sample from its source sample, demonstrating significant potential for the application of asphaltenes in oil fingerprinting. [ABSTRACT FROM AUTHOR]

Purpose – The purpose of this paper is to examine the dilemma at the heart of nursing care – the striving for empowerment of people in nurses’ care with the responsibility to protect vulnerable adults from harm. In doing so, it argues that in difficult and borderline cases, capacity assessment is complex and ultimately based on a judgment involving interpretation, and welcomes the views of clinicians who have challenged the procedural test of capacity in the Mental Capacity Act (MCA). Design/methodology/approach – It presents an illustrative study of a person with acquired brain injury (ABI) resident in a nursing home, who had been assessed under the MCA and judged to have capacity regarding health and welfare decisions, who subsequently displayed a persistent and impulsive desire to leave the unit without thought of risk and vulnerability to herself, prompting safeguarding concerns, and a reassessment of her capacity. Findings – The paper asserts that supporting people with ABI during capacity assessments, as the MCA decrees, in a very structured way can create a false sense of “capacity”. It maintains that executive impairments in ABI, being difficult to assess in formal settings, are best undertaken over time, in real-life settings, with evidence from third parties. It welcomes the MCA’s desire to protect individual autonomy and avoid undue paternalism, through ensuring people are not deemed to lack capacity simply because they make an unwise decision. Originality/value – But it goes on to argue that in ABI it is often the fact of unwise decision making that is the prominent factor and main concern, particularly in regard to impulsive decision making. If nurses have to make a judgment as to how unwise decisions made with decision-making capacity are to be distinguished from unwise decisions made without it in people with ABI, then, the author concludes, a major area of difficulty for nurses is ascertaining when the presumption of capacity should be challenged, an area that an updated code of practice needs to clarify. [ABSTRACT FROM AUTHOR]

In the past, forensic soil examination was a routine aspect of forensic trace evidence examinations. The apparent need for soil examinations then went through a period of decline and with it the capability of many forensic laboratories to carry out soil examinations. In more recent years, interest in soil examinations has been renewed due-at least in part-to soil examinations contributing to some high profile investigations. However, much of this renewed interest has been in organisations with a primary interest in soil and geology rather than forensic science. We argue the need to reinstate soil examinations as a trace evidence sub-discipline within forensic science laboratories and present a pathway to support this aim. An examination procedure is proposed that includes: (i) appropriate sample collection and storage by qualified crime scene examiners; (ii) exclusionary soil examinations by trace evidence scientists within a forensic science laboratory; (iii) inclusionary soil examinations by trace evidence scientists within a forensic science laboratory; and (iv) higher-level examination of soils by specialist soil scientists and palynologists. Soil examinations conducted by trace evidence scientists will be facilitated if the examinations are conducted using the instrumentation routinely used by these examiners. Hence, the proposed examination protocol incorporates instrumentation in routine use in a forensic trace evidence laboratory. Finally, we report on an Australian soil scene variability study and a blind trial that demonstrate the utility of the proposed protocol for the effective triage and management of soil samples by forensic laboratories. [ABSTRACT FROM AUTHOR]

The detection of ignitable liquid residues (ILRs) at a fire scene can be valuable evidence to indicate if the fire may have been deliberately set. In this study, a commercially-available portable GC-MS, the TRIDION-9, was evaluated for the purpose of on-site fire debris analysis. The instrument, which incorporates a low thermal mass capillary GC and a miniaturised toroidal ion trap mass spectrometer, is designed to use solid-phase microextraction (SPME) as the default sampling method. Four ignitable liquids (petrol, mineral turpentine, kerosene and diesel) and seven substrates (nylon, polypropylene and wool carpet, rubber and foam underlay, untreated pine and polyurethane) were considered. After method optimisation, substrates were burned and spiked with 0.1 μL of ignitable liquid (mineral turpentine, kerosene, diesel fuel, and both neat and weathered unleaded petrol). Sampling was performed via passive headspace SPME adsorption over 3 min immediately followed by analysis using the TRIDION-9 (analysis time < 2 min). Field trials were performed on fire debris samples collected from an accelerated structural fire. The data from the portable GC-MS analyses permitted the detection and correct classification of ILRs in the majority of samples analysed. Overall, the TRIDION-9 was found to be well-suited to the field-based analysis of fire debris samples as a preliminary screen to provide rapid presumptive results for fire investigators. [ABSTRACT FROM AUTHOR]

We show that there exists a non-weakly compact, closed, bounded, convex subset W of the Banach space of convergent sequences ( c , ‖ ⋅ ‖ ∞ ) , such that every nonexpansive mapping T : W ⟶ W has a fixed point. This answers a question left open in the 2003 and 2004 papers of Dowling, Lennard and Turett. This is also the first example of a non-weakly compact, closed, bounded, convex subset W of a Banach space X isomorphic to c 0 , for which W has the fixed point property for nonexpansive mappings. We also prove that the sets W may be perturbed to a large family of non-weakly compact, closed, bounded, convex subsets W q of ( c , ‖ ⋅ ‖ ∞ ) with the fixed point property for nonexpansive mappings; and we discuss similarities and differences with work of Goebel and Kuczumow concerning analogous subsets of ℓ 1 . [ABSTRACT FROM AUTHOR]

Document examination is an important forensic discipline and the legal system regularly needs the knowledge and skills of the scientific expert when questioned documents are involved in criminal or civil matters. Amongst the many aspects of the scientific examination of documents, elemental analysis can provide useful results. In this study, the evaluation of the analytical performance of a commercially available laser-induced breakdown spectroscopy (LIBS) instrument was conducted on office papers, writing inks, inkjet inks and laser printer toners. The paper sample set analysed consisted of 33 Australian paper specimens originating from the same production plant but representing different brands and/or batches. In addition, a total of 131 ink or toner samples were examined that included black and blue ballpoint inks, black inkjet inks, and black laser printer toners originating from several manufacturing sources, models and/or batches. Results from the LIBS method were compared against those obtained using more established elemental profiling method such as laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). LIBS demonstrated detectable and significant differences between different batches of the same brand as well as between different brands of paper, ink and toner samples. The LIBS method provided comparable discrimination powers for the selected sample sets when compared to those obtained using LA-ICP-MS (discrimination from 99.8 and 100% of the sample pairs, depending on the sample subset under examination). LIBS is a suitable technique for the determination of elemental composition as part of a protocol for the examination of questioned documents. [ABSTRACT FROM AUTHOR]

This article evaluates the ability of the Coordinated Regional Downscaling Experiment ( CORDEX) regional climate models ( RCMs) in simulating monthly rainfall variation during the austral summer half year (October to March) over southern Africa, the timing of the rainy season and the relative frequencies of rainfall events of varying intensities. The phasing and amplitude of monthly rainfall evolution and the spatial progression of the wet season onset are well simulated by the models. Notwithstanding some systematic biases in a few models, the simulated onset and end of the rainy season and their interannual variability are highly correlated with those computed from the reference data. The strongest agreements between the reference and modelled precipitation patterns are found north of about 20°S in the vicinity of the Inter Tropical Convergence Zone. A majority of the RCMs adequately capture the reference precipitation probability density functions, with a few showing a bias towards excessive light rainfall events. [ABSTRACT FROM AUTHOR]

Purpose -- The purpose of this paper is to give a brief background to the Deprivation of Liberty Safeguards (DoLS), and studies which factors Best Interests Assessors consider when making a judgement on Deprivation of Liberty. It examines some of the reasons why professionals may be under-using DoLS, including lack of knowledge, complex processes and paperwork, and the pejorative nature of the word "deprivation", and looks at a possible way forward. Design/methodology/approach -- The paper looks at the evidence to the House of Commons and House of Lords Committees on the Mental Health Act and Mental Capacity Act, as well as previous and current research papers. It examines the nuances of difference between restriction and deprivation, and the cumulative impact of several restrictions, which may, in fact, amount to a deprivation, illustrated by case studies from the author's own practice. Findings -- It makes the case that health and social care professionals should err on the side of caution, by making precautionary DoLS applications, arguing that MCA DoLS is a forerunner of good practice, and that good care planning allied to judicious application of the MCA leads to better, more robust and more defensible decision making. Originality/value -- And it points the way to a possible future, citing the recommendations of the Select Committee on the MCA for a clearer link between DoLS and the principles underpinning the MCA, and for simplifying and clarifying the legislative provisions and the associated paperwork. [ABSTRACT FROM AUTHOR]

In the past, forensic soil examination was a routine aspect of trace evidence examination in forensic science. However, in Australia, the apparent need for soil examinations has diminished and with it the capability of forensic science laboratories to carry out soil examination has been eroded. In recent years, due to soil examinations contributing to some high profile investigations, interest in soil examinations has been renewed. Routine soil examinations conducted in a forensic science laboratory by trace evidence scientists can be facilitated if the examinations are conducted using the instrumentation routinely used by these examiners. Spectroscopic techniques such as visible microspectrophotometry (MSP) and Attenuated Total Reflectance (ATR) Fourier Transform Infrared spectroscopy (FTIR) are routinely used by trace evidence analysts for the colour and compositional analysis, respectively, of forensic items, including paints, fibres, inks and toners, tapes, adhesives and other miscellaneous examinations. This article presents an examination of the feasibility of using MSP and ATR-FTIR as a first step in the forensic comparison of soils with particular reference to Australian soil samples. This initial study demonstrates MSP and ATR-FTIR can effectively be used as a screening test for the discrimination of ''forensic-sized'' soil samples prior to submission for more detailed analyses by a soil expert. [ABSTRACT FROM AUTHOR]

Purpose -- As a healthcare professional caring for people who lack capacity, the author has noted a wide variation in knowledge and awareness by staff of the Deprivation of Liberty Safeguards (DoLS). The purpose of this paper is to examine the DoLS and the background to their coming into being, describes their operation and qualifying requirements, and the continuing problems with their application nationwide. Design/methodology/approach -- Utilising a literature search of government papers, official reports of statutory bodies, and critical studies, it examines the central criticisms of DoLS, particularly the lack of a clear statutory definition of deprivation of liberty, and reports on the wide variation in knowledge of the legislation by staff in health and social care, and uneven application of the safeguards nationwide. Findings -- It cites evidence from studies showing that even professionals with high levels of expertise in the field find the legislation confusing, and presents testimony from legal experts that case law has failed to clarify the issues for professionals. Originality/value -- Finally, it argues that the legislation is now too complex to successfully amend, and tentatively suggests that, pending a government review to make the process more understandable, health care professionals make 'precautionary' applications for DoLS. The author argues that, notwithstanding its faults, the process is a worthwhile exercise in care planning and ensuring that people's care is in their best interests and the least restrictive available. [ABSTRACT FROM AUTHOR]

The detection, comparison and identification of fingerprints remains one of the best means of linking an individual with a scene or an item related to a criminal investigation. While many methods exist for the detection and enhancement of fingermark evidence on common substrates, significant ongoing research is being directed at improved sensitivity via new approaches or the optimisation of existing methods. Current techniques may be ineffective for the detection of weak fingermarks, or may not reveal sufficient ridge detail to permit an identification. In addition, surfaces still remain where fingermark detection is problematic (e.g. human skin). The identification of fingermarks has come under significant scrutiny over the last decade, particularly with respect to the perceived lack of fundamental research and the subjective nature of current fingermark identification practices. Significant effort is being directed at these issues by a number of research groups around the world. The International Fingerprint Research Group (IFRG) holds biennial meetings to discuss current research and present research findings related to fingermark evidence. The purpose of this article is to summarise the fingermark detection and identification research presented at the 2011 and 2013 meetings of this group. [ABSTRACT FROM PUBLISHER]

Abstract: Using a theorem of Domínguez Benavides and the Strong James’ Distortion Theorems, we prove that if a Banach space is a Banach lattice, or has an unconditional basis, or is a symmetrically normed ideal of operators on an infinite-dimensional Hilbert space, then it is reflexive if and only if it has an equivalent norm that has the fixed point property for cascading nonexpansive mappings. This new class of mappings strictly includes nonexpansive mappings. Also, using a theorem of Mil’man and Mil’man, we show that for the above classes of Banach spaces, reflexivity is equivalent to the fixed point property for affine cascading nonexpansive mappings. Further, we show that a cascading nonexpansive mapping on a closed, bounded, convex set in a Banach space always has an approximate fixed point sequence. [Copyright &y& Elsevier]

Abstract: We provide characterizations of convex, compact for the topology of local convergence in measure subsets of non-commutative -spaces previously considered for classical -spaces. More precisely, if is a semifinite and -finite von Neumann algebra equipped with a distinguished semifinite faithful normal trace , is the non-commutative Yosida–Hewitt projection, and is a norm bounded subset of that is convex and closed for the topology of local convergence in measure then we isolate the precise conditions on for which is compactness preserving, sequentially continuous, or continuous when is equipped with the weak* topology and with the topology of local convergence in measure. [Copyright &y& Elsevier]

Fingerprint identification has been an accepted forensic discipline for more than 110 years. But how far have we come with respect to the interpretation and reporting of fingerprint evidence? Should the discipline follow the DNA lead and introduce mathematical models for the assessment of fingerprint evidence, with the ‘statistic' – the number generated by the model – then becoming the evidence presented in court? Further to this, and with respect to evidence that can be given a statistical value, to what extent are we meeting our professional obligation to ensure that the weight of the evidence we present in court is fully understood and not misinterpreted? [ABSTRACT FROM PUBLISHER]

The Productive Ward initiative allows nursing staff to bring about changes in the workplace, streamline systems of work and release time to care for clients. As an evidence-based approach that focuses on the welfare of staff and service users, it also allows nursing teams to measure and improve tasks and efficiency. This article describes how one acute ward implemented the initiative and some of the improvements that were made as a result. [ABSTRACT FROM AUTHOR]

The Productive Ward initiative allows nursing staff to bring about changes in the workplace, streamline systems of work and release time to care for clients. As an evidence-based approach that focuses on the welfare of staff and service users, it also allows nursing teams to measure and improve tasks and efficiency. This article describes how one acute ward implemented the initiative and some of the improvements that were made as a result. [ABSTRACT FROM AUTHOR]

Abstract: In 2004 Dowling, Lennard and Turett showed that every non-weakly compact, closed, bounded, convex (c.b.c.) subset K of is such that there exists a -nonexpansive mapping T on K that is fixed point free. This mapping T is generally not affine. It is an open question as to whether or not on every non-weakly compact, c.b.c. subset K of there exists an affine -nonexpansive mapping S that is fixed point free. We prove that if a Banach space contains an asymptotically isometric (ai) -summing basic sequence , then the closed convex hull of , , fails the fixed point property for affine nonexpansive mappings. Moreover, we show that there exists an affine contractive mapping that is fixed point free. Furthermore, we prove that for all sequences in with and , the closed, bounded, convex subset of defined by where each , is such that there exists an affine contractive mapping that is fixed point free. [Copyright &y& Elsevier]

Abstract: In 1981, Dale Alspach modified the baker’s transform to produce the first example of a nonexpansive mapping on a weakly compact convex subset of a Banach space that is fixed point free. By Zorn’s lemma, there exist minimal weakly compact, convex subsets of which are invariant under and are fixed point free. In this paper we produce an explicit formula for the th power of , , and prove that the sequence converges weakly to , for all . From this we derive a characterization of the minimal invariant sets of . [Copyright &y& Elsevier]

Abstract: In 1967 Komlós proved that for any sequence in , with (where μ is a probability measure), there exists a subsequence of and a function such that for any further subsequence of , Later, Lennard proved that every convex subset of satisfying the conclusion of the previous theorem is norm bounded. In this paper, we isolate a very general class of Banach function spaces (those satisfying the Fatou property), to which we generalize Lennard''s converse to Komlós'' Theorem. We also extend Komlós'' Theorem itself to a broad class of Banach function spaces: those that satisfy the Fatou property and are finitely integrable (or even weakly finitely integrable), when the measure μ is σ-finite. Banach function spaces satisfying the hypotheses of both theorems include (, ), Lorentz, Orlicz and Orlicz–Lorentz spaces. [Copyright &y& Elsevier]

Abstract: We study certain Hardy-type sequence spaces and , , which are analogues of and , respectively. We show that the Mazur product is not onto for every with . We present corollaries for spaces defined via weighted seminorms and for . The latter corollary provides a new solution of Mazur''s Problem 8 in the Scottish Book. [Copyright &y& Elsevier]

Abstract: Let be the topology of convergence locally in measure on and P be the Yosida–Hewitt projection from onto . We characterize convex, -compact subsets C of as precisely those for which P is a compactness preserving map from with the -topology to C with the -topology. We further show that a convex, -closed, -norm bounded subset C of is a Schur set if and only if is sequentially continuous. Finally, we discover which -closed, bounded, convex subsets C of are such that is continuous. We call such sets C good. They turn out to be precisely the pluriweak-to-measure-continuity sets, in the sense defined below. [Copyright &y& Elsevier]

The detection and identification of latent fingermarks remains one of the best forensic techniques for the investigation of crime. The value of fingerprint evidence for a particular investigation relies on the ability of the fingerprint technician to detect, enhance, and record the latent fingermarks that are left behind when a smooth surface is handled with the bare hands. There is a wide range of optical, physical, and chemical detection techniques available that can be employed to detect and enhance fingermarks on various surfaces. The purpose of this article is to provide an overview of the common fingerprint detection methods that are employed in routine casework. The information provided includes the general principle behind each technique, how the technique is applied, and how methods can be employed in sequence to maximise detection effectiveness. [ABSTRACT FROM AUTHOR]

While significant fingerprint detection research has taken place over the last 25 years, surfaces still remain where fingermark development is problematic. In addition, while current capabilities provide a reasonable level of detection sensitivity on most common surfaces, they may be ineffective for the detection of weak fingermarks, or may not reveal sufficient ridge detail in such marks for identification purposes. For these reasons, latent fingermark detection remains an area where there is significant ongoing research around the world. A meeting of the International Fingerprint Research Group (IFRG) was recently held in Canberra, Australia, and was hosted by the Australian Federal Police. The purpose of this article is to summarise a number of areas of fingerprint detection research that were discussed at this IFRG meeting. This provides an insight into future prospects in this field and priority areas for research within the fingerprint detection discipline. [ABSTRACT FROM AUTHOR]

Abstract: 1,2-Indanedione is an emerging fingermark reagent used on porous surfaces. The general consensus is that this reagent is at least as sensitive as DFO, with some research showing higher sensitivity for 1,2-indanedione as opposed to DFO. However, a number of discrepancies existed in the literature as to which formulation and which development procedure produces optimal results. This project set out to investigate the best formulation and development procedure under Australian conditions, encompassing all published recommendations as well as some novel approaches. 1,2-Indanedione formulations were compared with respect to initial colour, fluorescence, concentration of reagent, acetic acid concentration, and the effect of different carrier solvents. Numerous development conditions were investigated, including a conventional oven, a heat press and humidity. Further enhancement using metal salt treatment and liquid nitrogen was also evaluated. The heat press set at 165°C for 10s proved to give the best initial colour and most intense luminescence. Secondary metal salt treatment improved initial colour and luminescence. The Polilight, the VSC 2000, and the Condor Chemical Imaging macroscope have been used to detect the fingerprints developed with 1,2-indanedione on a variety of high- and low-quality porous and semi-porous surfaces, with impressive results overall. Laboratory and field tests were conducted to compare 1,2-indanedione with DFO and ninhydrin as well as to investigate the position of 1,2-indanedione in the sequence of reagents for fingermark detection on porous surfaces. Overall, 1,2-indanedione proved to be a viable alternative to traditional methods for the detection of fingermarks on porous surfaces, with more fingermarks being developed using this reagent on real samples than both DFO and ninhydrin and a combination of the two reagents. [Copyright &y& Elsevier]

Abstract: The key role of a forensic scientist is to assist in determining whether a crime has been committed, and if so, assist in the identification of the offender. Many people hold the belief that a particular item can be conclusively linked to a specific person, place or object. Unfortunately, this is often not achievable in forensic science. In performing their role, scientists develop and test hypotheses. The significance of those hypotheses that cannot be rejected upon completion of all available examinations/analyses is then evaluated. Although one can generally identify the substances present using available techniques, it is generally not possible to distinguish one source of the same substance from another. In such circumstances, although a particular hypothesis cannot be rejected, it cannot be conclusively proven, i.e. the samples could still have originated from different sources. This limitation of not being able to distinguish between sources currently extends to the analysis of other forensic samples including, but not limited to, ignitable liquids, paints, adhesives, textile fibres, plastics, and illicit drugs. Stable isotope ratio mass spectrometry (IRMS) is an additional technique that can be utilised to test a given hypothesis. This technique shows the potential to be able to individualise a range of materials of forensic interest. This paper provides a brief description of the technique, followed by a review of the various applications of IRMS in different scientific fields. The focus of this summary is on forensic applications of IRMS, in particular the analysis of explosives, ignitable liquids and illicit drugs. [Copyright &y& Elsevier]

In every Intergovernmental Panel on Climate Change (IPCC) Assessment cycle, a multitude of scenarios are assessed, with different scope and emphasis throughout the various Working Group reports and special reports, as well as their respective chapters. Within the reports, the ambition is to integrate knowledge on possible climate futures across the Working Groups and scientific research domains based on a small set of "framing pathways" such as the so-called representative concentration pathways (RCPs) in the Fifth IPCC Assessment Report (AR5) and the shared socioeconomic pathway (SSP) scenarios in the Sixth Assessment Report (AR6). This perspective, initiated by discussions at the IPCC Bangkok workshop in April 2023 on the "Use of Scenarios in AR6 and Subsequent Assessments", is intended to serve as one of the community contributions to highlight the needs for the next generation of framing pathways that is being advanced under the Coupled Model Intercomparison Project (CMIP) umbrella, which will influence or even predicate the IPCC AR7 consideration of framing pathways. Here we suggest several policy research objectives that such a set of framing pathways should ideally fulfil, including mitigation needs for meeting the Paris Agreement objectives, the risks associated with carbon removal strategies, the consequences of delay in enacting that mitigation, guidance for adaptation needs, loss and damage, and for achieving mitigation in the wider context of societal development goals. Based on this context, we suggest that the next generation of climate scenarios for Earth system models should evolve towards representative emission pathways (REPs) and suggest key categories for such pathways. These framing pathways should address the most critical mitigation policy and adaptation plans that need to be implemented over the next 10 years. In our view, the most important categories are those relevant in the context of the Paris Agreement long-term goal, specifically an immediate action (low overshoot) 1.5 °C pathway and a delayed action (high overshoot) 1.5 °C pathway. Two other key categories are a pathway category approximately in line with current (as expressed by 2023) near- and long-term policy objectives, as well as a higher-emission category that is approximately in line with "current policies" (as expressed by 2023). We also argue for the scientific and policy relevance in exploring two "worlds that could have been". One of these categories has high-emission trajectories well above what is implied by current policies and the other has very-low-emission trajectories which assume that global mitigation action in line with limiting warming to 1.5 °C without overshoot had begun in 2015. Finally, we note that the timely provision of new scientific information on pathways is critical to inform the development and implementation of climate policy. Under the Paris Agreement, for the second global stocktake, which will occur in 2028, and to inform subsequent development of nationally determined contributions (NDCs) up to 2040, scientific inputs are required by 2027. These needs should be carefully considered in the development timeline of community modelling activities, including those under CMIP7. [ABSTRACT FROM AUTHOR]

The Geoengineering Model Intercomparison Project (GeoMIP) has proposed multiple model experiments during phases 5 and 6 of the Climate Model Intercomparison Project (CMIP), with the latest set of model experiments proposed in 2015. With phase 7 of CMIP in preparation and with multiple efforts ongoing to better explore the potential space of outcomes for different solar radiation modifications (SRMs) both in terms of deployment strategies and scenarios and in terms of potential impacts, the GeoMIP community has identified the need to propose and conduct a new experiment that could serve as a bridge between past iterations and future CMIP7 experiments. Here we report the details of such a proposed experiment, named G6-1.5K-SAI, to be conducted with the current generation of scenarios and models from CMIP6 and clarify the reasoning behind many of the new choices introduced. Namely, compared to the CMIP6 GeoMIP scenario G6sulfur, we decided on (1) an intermediate emission scenario as a baseline (the Shared Socioeconomic Pathway 2-4.5), (2) a start date set in the future that includes both considerations for the likelihood of exceeding 1.5 °C above preindustrial levels and some considerations for a likely start date for an SRM implementation, and (3) a deployment strategy for stratospheric aerosol injection that does not inject in the tropical pipe in order to obtain a more latitudinally uniform aerosol distribution. We also offer more details regarding the preferred experiment length and number of ensemble members and include potential options for second-tier experiments that some modeling groups might want to run. The specifics of the proposed experiment will further allow for a more direct comparison between results obtained from CMIP6 models and those obtained from future scenarios for CMIP7. [ABSTRACT FROM AUTHOR]

Let (Ω , Σ , μ) be a σ -finite measure space and consider the Lebesgue function space L 1 (μ) endowed with its standard norm. We obtain a characterization of weak compactness for closed bounded convex subsets of L 1 (μ) in terms of the existence of fixed points for certain classes of eventually affine, uniformly Lipschitzian mappings. [ABSTRACT FROM AUTHOR]

This project evaluated the fingermark imaging ability of several alternate image capturing devices selected for their potential to assist with the recording of fingermarks in difficult-to-reach locations commonly encountered at crime scenes, e.g. the inside surface of door handles. Four small form-factor non-DSLR camera systems — intraoral camera, borescope, fibre-optic camera and an iPhone — were evaluated under controlled conditions for their ability to image fingermarks with sufficient detail for identification. Evaluation was conducted using black powdered fingermarks and standard photographic test targets. A qualitative visual evaluation approach was also developed to gauge whether image quality was appropriate for fingermark identification. The results obtained indicated that most of the systems were capable of capturing fingermark details suitable for identification in controlled environments; however, the inherent contrast of the fingermark had an impact on the success of various imaging devices. The practicality and capability of alternate camera devices for fingermark recovery in pseudo-operational conditions is part of ongoing research. [ABSTRACT FROM AUTHOR]

This project evaluated the fingermark imaging ability of several alternate image capturing devices selected for their potential to assist with the recording of fingermarks in difficult-to-reach locations commonly encountered at crime scenes, e.g. the inside surface of door handles. Four small form-factor non-DSLR camera systems — intraoral camera, borescope, fibre-optic camera and an iPhone — were evaluated under controlled conditions for their ability to image fingermarks with sufficient detail for identification. Evaluation was conducted using black powdered fingermarks and standard photographic test targets. A qualitative visual evaluation approach was also developed to gauge whether image quality was appropriate for fingermark identification. The results obtained indicated that most of the systems were capable of capturing fingermark details suitable for identification in controlled environments; however, the inherent contrast of the fingermark had an impact on the success of various imaging devices. The practicality and capability of alternate camera devices for fingermark recovery in pseudo-operational conditions is part of ongoing research. [ABSTRACT FROM AUTHOR]

The Paris Agreement of COP21 set a goal of holding global average temperature increases to below 2 °C above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 °C. This is particularly relevant for the African context where temperatures are likely to warm faster than the global average and where the magnitude of change will be regionally heterogeneous. Most studies that provide information over Africa under specific global warming levels have used data from global models, however global models poorly resolve local scale forcing (e.g. topography) nor the internal climate variability of a region. Although downscaling using regional climate models can address these issues, we found only one paper that had used downscaled data for GWL studies over Africa. During 2018 the CORDEX-Africa campaign investigated the impact of 1.5 and 2 degrees of global warming over many regions of sub-Saharan Africa and compiled the results for a special issue of nine papers in ERL. This paper reports on some of the key regional findings of the analysis of 25 CORDEX downscalings, including the impact of the extra 0.5 degrees of warming between 1.5 and 2 degrees on particular extremes and the differences noted between the driving GCMs and downscaled results. We also briefly discuss the impact of the papers in the IPCC SR15 and their contribution to the development of adaptation and mitigation policies. [ABSTRACT FROM AUTHOR]

'Make me comfortable' were the last words of Sergeant First Class Randy Johnson of the United States 2nd Stryker Cavalry Regiment. The investigation into his murder would take seven years, span three countries, and involve forensic and technical exploitation analysis in the United States and the United Kingdom. The purpose of this case study is to discuss the unique aspects of battlefield forensic science and key factors that can lead to the prosecution of foreign terrorist fighters to meet obligations under United Nations Security Council Resolution 2396 (2017) and 2322 (2016) for member states to investigate foreign terrorist fighters. [ABSTRACT FROM AUTHOR]

The application of nanoparticles for latent fingermark detection has been reported in the literature over the past two decades. One of the nanoparticles that shows promise to become a routine technique is functionalised silicon oxide nanoparticles (SiO2 NPs). In a recent optimisation of the technique, the use of carboxyl-functionalised SiO2 NPs doped with luminescent ruthenium complex was proposed as a breakthrough for latent fingermark detection. In this study, the aforementioned functionalised SiO2 NPs were extensively evaluated. Modification and optimisation of the original detection parameters were performed to enhance detection quality and improve applicability. Various detection parameters were evaluated and assessed. A lower concentration of the functionalised nanoparticles used in the colloidal dispersion was determined to offer improved detection effectiveness. A combination of increased bath temperature and reduced immersion time was found to produce good overall results. A set of modified detection parameters was suggested for the use of the functionalised SiO2 NPs to detect latent fingermarks. Performance of the modified detection parameters was compared against that of the published detection method. Comparison experiments were carried out on fingermark specimens deposited on aluminium foil, transparent polypropylene plastic and green polyethylene plastic. Three donors (weak, average and strong) and two age intervals (ten days and three months) were considered in the comparison study. Evaluation of the results suggested that the overall performance of the modified method for latent fingermark detection was superior to that obtained using the previously published detection parameters. [ABSTRACT FROM AUTHOR]

Forensic biometrics is the application of forensic science principles to physical and behavioral characteristics. Forensic biometrics is a secondary sub‐system in the forensic science "system of systems," which describes forensic science as a sub‐system in the larger criminal justice, law enforcement, intelligence, and military system. The purpose of this paper is to discuss biometrics in the military domain and integration into the wider forensic science system of systems. The holistic system thinking methodology was applied to the U.S. biometric system to map it to the system of systems framework. The U.S. biometric system is used as a case study to help guide other countries to develop military biometric systems that are integrated and interoperable at the whole‐of‐government level. The aim is to provide the system of systems framework for agencies to consider for proactive design of biometric systems. [ABSTRACT FROM AUTHOR]

ABSTRACT A comprehensive analysis of near surface (10-m and 850 hPa) long-term (1980-2015) austral summer mean wind speed trends over southern Africa and the surrounding oceans (10°-40°S and 10°W-50°E) is carried out. The climate forecast system reanalysis and the climate forecast system reanalysis version 2, the modern era retrospective-analysis for research and applications version 2, and the ERA-Interim products are used for the analysis. Trends are estimated using the Theil-Sen slope estimator and their significance tested with the Mann-Kendall test. Attribution of the wind speed trends to large scale circulation systems is determined from: (1) trends in 850 hPa geopotential height, surface pressure, and surface skin temperatures, (2) changes in the annual frequency of archetypal synoptic states generated by self-organizing maps from geopotential height data, and (3) the correlations of the wind speeds to the southern annular mode ( SAM) and El Niño Southern Oscillations ( ENSO) indices. There is an overall decline in wind speeds evident in all the reanalyses. Wind speeds reduce by an average 0.7 and 1.3 m s−1 at 10 m and 850 hPa, respectively, over the study period. Deceleration in midlatitude westerly and Atlantic south easterly winds are associated with a poleward shift in the subtropical anticyclone, a positive trend in the annual frequency of summer circulation weather types, and the weakening of the subtropical continental heat low. The SAM and ENSO are also found to have a statistically significant linear association with the observed wind speed trends. [ABSTRACT FROM AUTHOR]

Fingermark enhancement reagents capable of molecular recognition offer a highly selective and sensitive method of detection. Antibodies and aptamers provide a high degree of adaptability for visualisation, allowing for the selection of the most appropriate visualisation wavelength for a particular substrate without the need for specialist equipment or image processing. However, the major hurdle to overcome is the balance between sensitivity and selectivity. Single-target molecular recognition is highly specific, purported to have better detection limits than chemical reactions or stains, and can provide information about the donor or activity, but often results in incomplete ridge pattern development. Consequently, the development and evaluation of multi-target biomolecular reagents for fingermark enhancement was investigated, with the focus on endogenous eccrine secretions. To assess the suitability of the immunogenic reagents for potential operational use, a variety of parameters (i.e., processing time, fixing and working solution conditions) were optimised on a wide range of non-porous and semi-porous substrates. The relative performance of immunogenic reagents was compared to that of routine techniques applied to latent marks and marks in blood, semen and saliva. The incorporation of these novel reagents into routine technique sequences was also investigated. The experimental results indicated that the multi-target immunogenic reagents were not a suitable alternative to routine detection methods or sequences, but may have promise as a "last resort" method for difficult substrates or cases. [ABSTRACT FROM AUTHOR]

ABSTRACT This study evaluates the capability of regional climate models ( RCMs) in simulating extreme rainfall events over Southern Africa, and in reproducing the characteristics of widespread extreme rainfall events ( WERE) in the Western Cape (South Africa). We obtained simulation datasets of nine RCMs from the Co-ordinated Regional Downscaling Experiment ( CORDEX) and compared them with observation datasets from the Global Precipitation Climatology Project ( GPCP) and Tropical Rainfall Measuring Mission ( TRMM) as well as with the reanalysis dataset ( ERAINT) that forced the simulations. A self-organising map was used to classify the WEREs into 12 nodes. The contribution of each RCM to each node was compared with the contributions of GPCP, TRMM and ERAINT. Using ERAINT dataset, we analysed the synoptic-scale atmospheric condition associated with each node. The results show that, in simulating the spatial distribution of the extreme rainfall event over Southern Africa, only four RCMs perform better than the forcing reanalysis ( ERAINT) while two RCMs perform worse than the reanalysis. All the RCMs underestimate the threshold of extreme rainfall over Western Cape, poorly simulate the inter-annual variability of the WEREs ( r ≤ 0.3), but correctly reproduce the maximum frequency of the WEREs in Autumn (March-May). The WEREs in the Western Cape may be broadly grouped into four synoptic rainfall patterns. The first pattern links WEREs with tropical rainfall activities (tropical-temperate troughs); the second pattern shows isolated WEREs; the third and fourth patterns link WEREs with rainfall activities in the mid-latitudes (frontal systems) and over the Agulhas Current, respectively. While most RCMs overestimate the frequency of the first pattern, they all underestimate the frequency of the second pattern but simulate the frequencies of the third and fourth patterns well. The results of this study should help in improving the RCM simulations over Southern Africa and in downscaling impacts of climate change on extreme rainfall events over the region. [ABSTRACT FROM AUTHOR]

Despite significant ongoing research, a substantial proportion of latent fingermarks remain undetected in casework. Therefore, to improve existing detection techniques and to allow the development of new approaches, it is important to gain a better understanding of detection mechanisms rather than solely focusing on method formulations. As a starting point, it is crucial to gain a deeper understanding of the fingermark residue itself. Even if the chemical composition is reasonably well understood, little research has been reported on the physical aspects related to the deposition of fingermarks and their interactions with the environment and underlying substrates. This study aimed at exploring various techniques that can be used for the non-destructive visualisation of fingermarks before applying detection techniques. Both light and electron microscopy were investigated. Phase contrast imaging and environmental scanning electron microscopy, coupled with energy-dispersive X-ray spectrometry, proved to be essential tools for the study of latent fingermark deposits. These methods can be used to gather fundamental information that will add to our body of knowledge in this field. [ABSTRACT FROM AUTHOR]

Investigations into the application of carboxyl-functionalised silicon oxide nanoparticles doped with a ruthenium complex (RuBpy-doped CES-SiO2 NPs) for latent fingermark development on non-porous surfaces were reported in previous studies. These studies suggested that an optimised NP-based method demonstrated advantages in fingermark selectivity and sensitivity. To continue the series of research into using RuBpy-doped CES-SiO2 NPs for fingermark detection, the versatility and overall practicality of the optimised SiO2 NP-based reagent for latent fingermark detection and enhancement was evaluated. When the optimised NP-based method was used in a repeated fashion (application of multiple NP treatment cycles), it was found that the overall fingermark detection quality increased across the evaluated fingermarks without a high risk of overdevelopment. The possibility of incorporating the optimised NP-based reagent for potential operational use (e.g., at crime scenes) was successfully demonstrated via spray application on three test surfaces (aluminium foil, transparent polypropylene film and green polyethylene film). It was also shown that further enhancement of "spray-detected" fingermarks was achievable via subsequent treatment using the NP-based reagent in a colloidal dispersion bath. Additionally, the compatibility of the optimised NP-based method with two-step cyanoacrylate fuming for latent fingermark detection was evaluated. It was concluded that the two techniques are not compatible for application in a fingermark detection sequence. While encouraging results were demonstrated in this study, further optimisation and comparison will be required before the multiple-treatment and spray-treatment approaches can be considered for operational implementation. [ABSTRACT FROM AUTHOR]

Background: Blowflies have relevance in areas of forensic science, agriculture, and medicine, primarily due to the ability of their larvae to develop on flesh. While it is widely accepted that blowflies rely heavily on olfaction for identifying and locating hosts, there is limited research regarding the underlying molecular mechanisms. Using next generation sequencing (Illumina), this research examined the antennal transcriptome of Calliphora stygia (Fabricius) (Diptera: Calliphoridae) to identify members of the major chemosensory gene families necessary for olfaction. Results: Representative proteins from all chemosensory gene families essential in insect olfaction were identified in the antennae of the blowfly C. stygia, including 50 odorant receptors, 22 ionotropic receptors, 21 gustatory receptors, 28 odorant binding proteins, 4 chemosensory proteins, and 3 sensory neuron membrane proteins. A total of 97 candidate cytochrome P450s and 39 esterases, some of which may act as odorant degrading enzymes, were also identified. Importantly, co-receptors necessary for the proper function of ligand-binding receptors were identified. Putative orthologues for the conserved antennal ionotropic receptors and candidate gustatory receptors for carbon dioxide detection were also amongst the identified proteins. Conclusions: This research provides a comprehensive novel resource that will be fundamental for future studies regarding blowfly olfaction. Such information presents potential benefits to the forensic, pest control, and medical areas, and could assist in the understanding of insecticide resistance and targeted control through cross-species comparisons. [ABSTRACT FROM AUTHOR]