bluuebunny/crossref_metadata_2025 huggingface dataset:
Nonlinear robust control of trajectory-following for autonomous ground electric vehicles with active front steering system
Authors: Jin Xianjian , Wang Qikang , Yan Zeyuan , Yang Hang
Published: March 2023

This paper presents a nonlinear robust H-infinity control strategy for improving trajectory following performance of autonomous ground electric vehicles (AGEV) with active front steering system. Since vehicle trajectory dynamics inherently influenced by various driving maneuvers and road conditions, the main objective is to deal with the trajectory following control challenges of parametric uncertainties, system nonlinearities, and external disturbance. The AGEV system dynamics and its uncertain vehicle trajectory following system are first modeled and constructed, in which parameter uncertainties related to the physical limits of tire are considered and handled, then the control-oriented vehicle trajectory following augmented system with dynamic error is developed. The resulting nonlinear robust H-infinity state-feedback controller (NHC) of vehicle trajectory-following system is finally designed by H-infinity performance index and nonlinear compensation under AGEV system requirements, and solved utilizing a set of linear matrix inequalities derived from quadratic H-infinity performance and Lyapunov stability. Simulations for double lane change and serpentine scenes are carried out to verify the effectiveness of the proposed controller with a high-fidelity, CarSim®, full-vehicle model. It is found from the results that the proposed NHC provides improved vehicle trajectory following performance compared with the linear quadratic regulator (LQR) controller and robust H-infinity state-feedback controller (RHC).
On the variable inverse sum deg index
Authors: Molina Edil D. , Bosch Paul , Sigarreta José M. , Tourís Eva
Published: March 2023

Several important topological indices studied in mathematical chemistry are expressed in the following way $ \sum_{uv \in E(G)} F(d_u, d_v) $, where $ F $ is a two variable function that satisfies the condition $ F(x, y) = F(y, x) $, $ uv $ denotes an edge of the graph $ G $ and $ d_u $ is the degree of the vertex $ u $. Among them, the variable inverse sum deg index $ IS\!D_a $, with $ F(d_u, d_v) = 1/(d_u^a+d_v^a) $, was found to have several applications. In this paper, we solve some problems posed by Vukičević [1], and we characterize graphs with maximum and minimum values of the $ IS\!D_a $ index, for $ a < 0 $, in the following sets of graphs with $ n $ vertices: graphs with fixed minimum degree, connected graphs with fixed minimum degree, graphs with fixed maximum degree, and connected graphs with fixed maximum degree. Also, we performed a QSPR analysis to test the predictive power of this index for some physicochemical properties of polyaromatic hydrocarbons.
Accountant Perceptions and Attitudes Towards the Social Accounting Practices in Bangladesh
Authors: Rahaman Mohammad Mizenur , Chowdhury Adiba Rahman Bushra , Akter Shamima , Rahman Md. Zillur
Published: March 2023

This paper is a speculative and exploratory essay on the emerging field of social accounting practices in Bangladesh. The study's main objective is to explore accountants' perceptions and attitudes towards Bangladesh's social accounting practices (SAP). Eighty accountants (chartered accountants and chartered management accountants working in the professional field level) of different firms were selected based on access priority from DSE. The study specifically used a mixed method. The study yielded a general overview of SAP in Bangladesh, where almost 77% of accountants followed SAP at their respective organizations differently. The study emphasized that SAP has a multifaceted conception where the company, managerial, and single firms act together. The practical implementation of this study relates to the professional level of education required for social accounting practice. This study concludes that SAP in Bangladesh is not up to the mark and needs to redesign a strategic plan.
Anaplasmosis in dogs in the western province of Sri Lanka: seroprevalence, clinical and laboratory findings
Authors: Wijeratne H. S. U. , Perera S. V. N.
Published: March 2023

Canine anaplasmosis is a zoonotic disease caused by Anaplasma phagocytophilum and Anaplasma platys transmitted by ticks. In Sri Lanka, only a few studies are available as this disease is often neglected (underdiagnosed) in clinical practice due to the non-specific clinical signs. This clinical communication describes seroprevalence, clinical and laboratory findings of 266 dogs seropositive for Anaplasma spp. identified from 450 anaemic dogs presented from Gampaha, Colombo and Kalutara areas of Western Province, Sri Lanka. Accordingly, the seroprevalence of Anaplasma spp. among this population of anaemic dogs was 59% (266/450). The majority of the Anaplasma seropositive dogs had non-specific clinical signs with low packed cell volume and thrombocytopenia. There was no statistically significant difference between seropositivity with age or gender of the dogs.
A case study of canine trypanosomiasis in Nepal
Authors: Regmi S. , Bista S. , Dhakal B.
Published: March 2023

A 11year-old mixed breed male dog was presented at a private veterinary clinic in Kathmandu, Nepal with clinical signs of high fever, staggering gait, laboured breathing, and twitching of the eyelids. Physical examination showed elevated body temperature (103.3°F), corneal opacity and pale mucous membranes. The blood report showed low haemoglobin count and packed cell volume indicating anaemia, elevated white blood cell count and reduced platelet count. Renal function was impaired, evident by increased blood urea nitrogen and creatinine levels. The case was confirmed by microscopic morphology of the parasite in a blood smear which showed the presence of numerous trypomastigotes, identified as Trypanosoma along with the blood profile, and clinical signs. Two doses of diminazene aceturate 7 days apart at the dose rate of 5mg per kg bwt. deep IM and supportive therapy were provided to the dog. The dog recovered after a week-long course of treatment.
Unusual features in Halifax Harbour, Nova Scotia, Canada, part 2
Authors: Fader G B J , Miller R O , Todd B J
Published: March 2023

The seabed of Halifax Harbour contains a number of features that can be classified into natural and anthropogenic features. Natural features are formed by nature and consist of bedforms such as sand waves, sedimentary furrows, boulder berms, moraines, pockmarks,
etc. Anthropogenic features are those formed by human activity and include anchor marks, cables, shipwrecks, dredge spoils, bridge and dock remains. The anthropogenic imprint on the Harbour bottom is very dense, particularly in the inner Harbour, and makes the collection of natural unaffected
samples difficult. This poster illustrates and describes anchor marks, gassy sediments, sedimentary furrows, pockmarks, the remnants of submarine net emplacements, vehicles dumped on the seabed, and an area of seafloor rich in glass bottles.
Making a three-dimensional model of Halifax Harbour, Nova Scotia, Canada
Authors: Fader G B J , Miller R O , Todd B J
Published: March 2023

Halifax Harbour is one of best-studied harbours in the world. Researchers at the Bedford Institute of Oceanography map the seabed, perform geochemical analyses of sediment core samples, measure currents and tides and study the effects of pollution on the biota.
To illustrate the complexity and intricate detail that exists on the seabed, a physical relief model of the harbour and surrounding area was constructed using the most recent technology. The model, which was milled from lightweight surfboard foam, shows underwater relief (bathymetry) as well as the
land topography. Onshore, high-resolution satellite imagery was "draped" over the topographic relief using a specially designed 3-D plotter. In underwater areas, bathymetry is represented by a suite of colours ranging from light blue, to indicate shallow areas, to darker blue for deeper water.
Computer generated shading was applied to emphasize detailed texture. Four "zoom" panels were also produced to focus on some of the finer details that are evident in the seabed. These details help us understand more about the harbour's geological history as well as the processes that are active
today, both natural and man-made. This poster explains the many stages in the process of creating the Halifax Harbour relief model.
Personal barriers to participation in chosen instrumental activities of daily living among community-dwelling persons with schizophrenia in Rwanda
Authors: Turikumana Pierre D. , Cloete Lizahn G. , Fredericks Jerome P.
Published: March 2023

Background: Mental disorders are a major health concern across the globe. Schizophrenia, one of the mental disorders, affects approximately 20 million people globally and 5 million people within the African continent. Schizophrenia can affect all areas of life, including participation in instrumental activities of daily living (IADLs).Objectives: The study aimed to explore personal barriers affecting participation in chosen IADLs among community-dwelling persons with schizophrenia in Kigali city, Rwanda.Method: A qualitative, embedded case study design and constructivist epistemology paradigm were used. Purposive sampling and semi-structured interviews were conducted with 20 participants that included 10 persons diagnosed with schizophrenia (case 1) and 10 of their caregivers (case 2). Data were analysed according to the seven steps of Ziebland and Mcpherson.Findings: The two themes identified were community negative attitudes and individual hindrances to participation in IADLs. Theme 1 demonstrated the community’s poor support towards persons with schizophrenia due to the stigma attached to mental health illness, which is reported elsewhere. This paper reports on individual hindrances to participation, which revealed limited knowledge and skills, decreased motivation and interest, financial problems, maladaptive behaviours, medication side effects, loss of social interaction and isolation, and disorganised in performing activities to negatively affect persons with schizophrenia’s full participation in their chosen IADLs.Conclusion: Community-dwelling persons with schizophrenia are experiencing various hindrances to participating in their chosen IADLs, which shows a need for support from different stakeholders to improve access and participation of persons with schizophrenia in their daily activities based on their abilities.Contribution: Different barriers affecting participation of the persons with schizophrenia in their chosen IADLs were highlighted together with the common affected IADLs. It is recommended that when right support is provided, persons with schizophrenia may function at their maximum abilities in their activities of choice and may live at their highest independence level.
Psychometric properties of a clinical assessment tool in the postgraduate midwifery programme, Botswana
Authors: Rasetshwane Itumeleng , Sepeng Nombulelo V. , Mooa Ramadimetja S.
Published: March 2023

Background: The psychometric properties of a clinical assessment tool used in the postgraduate midwifery programme in Botswana have not been evaluated. A lack of reliable and valid clinical assessment tools contributes to inconsistencies in clinical assessment in midwifery programmes.Objectives: This study aimed to evaluate the internal consistency and content validity of a clinical assessment tool used in the postgraduate midwifery programme in Botswana.Method: For internal consistency, we calculated the total-item correlation and Cronbach’s alpha coefficient. For content validity, subject matter experts completed a checklist to evaluate the relevance and clarity of each competency in the clinical assessment tool. The checklist included questions with Likert-scale responses, indicating the level of agreement.Results: The clinical assessment tool had a good reliability, with a Cronbach’s alpha of 0.837. The corrected item total correlation values ranged from –0.043 to 0.880 and the Cronbach’s alpha (if item deleted) ranged from 0.079 to 0.865. Overall content validity ratio was 0.95, and content validity index was 0.97. Item content validity indices ranged from 0.8 to 1.0. The overall scale content validity index was 0.97 and the scale content validity index using universal agreement was 0.75.Conclusion: The clinical assessment tool used in the postgraduate midwifery programme in Botswana has acceptable reliability. Most of the competencies included in the clinical assessment tool were relevant and clear. Certain competencies need to be reviewed to improve the reliability and validity of the clinical assessment tool.Contribution: The clinical assessment tool currently used in the postgraduate midwifery programme in Botswana had acceptable internal consistency reliability and validity.
Identity formation at the dawn of liturgical inculturation in the Ethiopian Episcopal Church
Authors: Kama Phumezile , Klaasen John S.
Published: March 2023

This article reflects on the impact of the inculturation of liturgy in the Ethiopian Episcopal Church (EEC) on identity formation within the context of African Christianity. In the EEC, the quest for African Christian identity formation is essential in understanding the role of black culture at the advent of the inculturation of liturgy. Inculturation can be viewed as the meeting and interaction of the Christian gospel and local cultures where neither the liturgy nor the cultures are superior than the other. Thus, it is vital to understand the inculturation of liturgy and its implications for African Christian identity in the EEC. There is a need for an official guiding principle or doctrinal and theological position on use of language and instruments associated with ancestor veneration at all levels of the EEC. The aim of this article is to clarify how the transformation of the EEC liturgy shaped the African Christianity’s identity of its members. It also attempts to provide clarification on the use of language, symbols, and instruments associated with traditional healers in the liturgy and how it creates identity confusion within the EEC. Lastly, we discuss some of the limitations in the liturgical inculturation endeavour in the EEC.Contribution: This article contributes to a wider discourse of Christian identity formation from the perspective of the coming together of Christianity and African culture. It also contributes to the quest of EEC members for being authentic Christians while also being proud Africans. Specifically, it contributes to the EEC’s quest for African identity through the inculturation of liturgy.
Reductionism or holism? The two faces of biology
Authors: Walker Joseph A. , Cloete Thomas E.
Published: March 2023

Reductionism and holism, that is, antireductionism, are two of the prevailing paradigms within the philosophy of biology. Reductionists strive to understand biological phenomena by reducing them to a series of levels of complexity with each lower level forming the foundation for the subsequent level, by mapping such biological phenomena inasmuch as possible to the principal phenomena within the fundamental sciences of chemistry and physics. In this way, complex phenomena can be reduced to assemblages of more elementary explananda. Holism, in counterpart, claims that there independently exist phenomena arising from ordered levels of complexity that have intrinsic causal power and cannot be reduced in this way. When dealing with the nature of biology and its unique foundations of essentialism, determinism and ethics, the pedagogical lens through which these foundations are conveyed to learners could provide a limited perspective if only the reductive approach is followed as it would not sensitise learners to the true complexity of the phenomenon of life and the study thereof, and it is the purpose of this article to frame the reductionist–antireductionist debate in order to illustrate this.Contribution: This article contributes new knowledge to the field of the philosophy of science; more specifically, the philosophy of biology by critically evaluating the pervasive dialectic between the theoretical frameworks of reductionism and antireductionism and alluding to the pedagogical consequences thereof.
The shaping stratum of the Markan passion narrative
Authors: Hombana Mphumezi
Published: March 2023

This study is an attempt to investigate the shaping stratum of the Markan passion narrative (PN). The ultimate focus is on discovering the factors behind the text of Mark that influenced the shaping of the passion account. Since early form criticism, there has been an assumed tradition of an early existing passion account prior to the Markan narrative, to which we do not have access in our contemporary world. However, this study argues that the PN is shaped not only by a tradition to which we do not have access, as argued by previous form critics but also perhaps by how one would describe any crucifixion in antiquity. As we possibly know, this could be true of any early tradition, including the PN in Mark. In other words, this paper is thus proposing a shift from a possible oral source (tradition) to general literary influences that shaped the Markan PN. This means we can see possible influences that determine what would be part of a narrative of a noble death from within Graeco-Roman and Jewish literary influences despite the fact that we cannot get hold of Mark’s traditional sources. This paper utilises historical criticism as the method to investigate the shaping stratum of the Markan PN.Contribution: So, an access to these literary influences serves as an adequate tool to aid the contemporary reader to adequately understand Mark’s PN as the death and resurrection of Jesus are the integral part in the whole story of Christianity. An understanding of this remarkable account is very significant for churches in Africa and worldwide too.
Prayerful persistence: Luke 18:1–8 through the lens of resilience
Authors: Potgieter Annette
Published: March 2023

The parable of the widow and the unjust judge is unique to Luke. It forms part of three other parables shedding light on the coming of the Son of Man. It also bears striking resemblances with the parable of the friend at midnight, but unlike the friend of midnight, persistence is a focal point for interpreting the parable. There is an intersection between the parable of the unjust judge and resilience theory. Resilience may be understood as the ability to have positive, better-than-expected outcomes in the face of adversity. The widow persists and manages to persuade the judge to aid her plight. Accordingly, this article explored the intersections between resilience theory and the parable of the unjust judge as an interpretive aid.Contribution: This article explored a multidisciplinary approach to Luke 18:1–8. Resilience theory was incorporated with exegesis, thereby offering another hermeneutical lens to the text that enriches our understanding.
Compliance of medical practitioners with diabetic treatment guidelines in West Rand, Gauteng
Authors: Ohanson Nneka J. , Pretorius Deidré
Published: March 2023

Background: Diabetes mellitus is increasing globally and is associated with multiple complications. Guidelines have been formulated to standardise care among people living with diabetes mellitus (DM), but research shows poor compliance with treatment guidelines. The aim of this study was to assess how well healthcare practitioners in a district hospital in Gauteng complied with the most recent diabetic treatment guideline, Society for Endocrinology Metabolism and Diabetes South Africa (SEMDSA) 2017.Methods: A retrospective cross-sectional review of patient record living with diabetes was done. This study was conducted in the out-patient department of Dr Yusuf Dadoo hospital in the West Rand, Gauteng. A total of 323 records of patients seen from August 2019 to December 2019 were reviewed, and some of the basic variables were assessed according to the most recent diabetic treatment guidelines SEMDSA 2017.Results: Files were audited in four categories: comorbidities, examinations, investigations and the presence of complications. Six monthly glycated haemoglobin (HbA1c) was assessed in 40 (12.4%), annual creatinine assessed in 179 (55.4%) and lipogram in 154 (47.7%) of patients. More than 70% of patients had uncontrolled glycaemia and two people were screened for erectile dysfunction.Conclusion: Monitoring and control parameters were infrequently done as per guideline recommendations. The resultant effects were poor glycaemic control and thus numerous complications.Contribution: Targeted strategies to improve medical practitioner compliance to guidelines including further research to study factors associated with poor compliance with guidelines are needed to improve the overall care of people living with DM in the West Rand and thus minimise the risk of complications among patients in the district.
Exploring the effects of power distance orientation on unethical pro-organisational behaviour from the perspective of management
Authors: Li Yiran , He Shanshu , Song Minyoung , Jeon Jeongho
Published: March 2023

Purpose: This study verifies whether the personal psychological factor of power distance disposition is perceived as conformity or obedience to the parties, triggers unethical pro-organisational behaviour (UPB) and is reinforced by hierarchy and market cultures.Design/methodology/approach: Structural equation model analysis was used to test the hypotheses, and Process macro was used to test the moderating effect rigorously. A survey was conducted from 15 August 2018 to 20 September 2018, and 565 questionnaires were collected for analysis.Findings/results: The effect of power distance orientation (PDO) on UPB was determined by deriving the regression coefficient with the control variable input in the relationship between the independent and dependent variables. Power distance orientation had a significant positive effect on UPB, even after controlling the influence of demographic variables. Pro-organisational members do not refrain from unethical actions when carrying out the tasks assigned by the company. This causal relationship is strengthened when hierarchy and market cultures are reinforced.Practical implications: To instil ethical behaviour in employees, a company must continuously manage the organisational culture and atmosphere, as well as educate and train employees on the company’s code of ethics.Originality/value: This study contributes to the limited body of knowledge examining both PDO (i.e. individual psychological factor) and organisational culture (i.e. work environment factor) as factors inducing UPB.
Theological basis of community development: A public inquiry from a practical theological view
Authors: Nanthambwe Patrick
Published: March 2023

Development has become a central topic in theological discussions on a global scale. Poverty and underdevelopment have been the subject of ongoing discussion in theological circles over the role of the churches in addressing these issues. Hence, the controversy regarding theology and progress has emerged. While it has been widely understood in theological discussions that theology must confront public challenges, few works have evaluated the grounds that compel a theological reflection on development. To this purpose, there is a crucial point that must be investigated about theology and development: how substantial are the arguments for the theology and development debate? Furthermore, how are such arguments biblically supported? This essay evaluates the arguments for a theology of development through the lens of public practical theology in order to provide answers to the problems posed above. Through literary analysis, the study proceeds to analyse the basis for theology and development from a biblical perspective, so demonstrating that God’s aim for his creation is development that strikes a balance between economic, environmental, and social elements. This article contributes to the conversation of the necessity of theological reflection on development.Intradisciplinary and/or interdisciplinary implications: This article contributes to the discussion between theological disciplines and development studies to provide a greater understanding of the significance of this debate to the church’s engagement with public issues such as development. The findings of this study are unquestionably valuable for churches in developing a public practical theology and enriching theological thought and church practice through community development.
Blind spot enlargement
Authors: Karamaounas Aristotelis , Sideri Anna M. , Tsiogka Anastasia , Georgiou Iordanis , Kourkoutas Dimitrios , Petrou Petros
Published: March 2023

A 39-year-old woman, without any systemic or ocular history, presented with a paracentral scotoma in her right eye with normal visual acuity. Humphrey's visual fields showed a reversible enlargement of the right blind spot. The final diagnosis was acute idiopathic blind spot enlargement which was successfully treated with intravenous steroids. Although differential diagnosis of blind spot enlargement can be challenging, multimodal imaging with combination of visual field's assessment can help us make the right diagnosis.
Clinical spectrum of first episode of optic neuritis in a tertiary care hospital in Southern India – A retrospective analysis
Authors: Vallinayagam Muthu K. , Deepikadevi S.N. , Sainath Dipika , Balla Shravya C.
Published: March 2023

PURPOSE:

The purpose of this study was to determine the demographic and clinical patterns of optic neuritis (ON) in patients presenting to a tertiary health-care institute and to study the incidence of multiple sclerosis (MS), magnetic resonance imaging features in varied ON, treatment outcome, and prognosis.

METHODS:

A retrospective analysis of patients with first episode of ON presenting to a tertiary care center during the period from March 2013 to March 2021 was done. Details of ocular examination were retrieved from medical records and statistically analyzed.

RESULTS:

Three hundred and fifty-four participants with ON were included in this study. The mean age was 40.25 ± 12.2 years. The male: female ratio was 1:1.35. 48.1% had visual acuity of <3/60. Based on clinical presentation, papillitis was seen in 31.5% of subjects, neuroretinitis in 24.1%, and retrobulbar neuritis in 44.4%. Based on etiology, 79.6% were idiopathic, 1.8% presented with infectious ON, and 9.26% were associated with demyelinating disease (MS).

CONCLUSION:

Females were predominantly affected. Idiopathic ON formed the major subset etiologically. Sixty-six percent had visual recovery of 6/18 or better following corticosteroid therapy. 9.2% revealed multiple intracranial lesions on neuroimaging, suggesting high association with MS. Therefore, early diagnosis, vigilant monitoring of steroid therapy, and regular follow-up screening for MS remain the mainstay of management in ON.
The use of occlusive contact lenses after failure of conventional for treatment of amblyopia
Authors: Abu-Ain Mohammad S. , Watts Patrick
Published: March 2023

PURPOSE:

The purpose of this study was to evaluate the usefulness and assess the risks associated with occlusive contact lenses (OCLs) use to treat refractory amblyopia in children who failed the conventional amblyopia treatment with patching and atropine penalization.

METHODS:

This was a retrospective case series of all children treated with an OCL in the sound eye over an 8-year period. Data were collected on the age, gender, and type of amblyopia, previous treatment received, and its duration. The compliance, tolerance, and adverse effects of OCL were recorded.

RESULTS:

There were 12 patients of which 10 were male. The mean age at the time of OCL use was 47.3 months (range 26–86 months). Anisometropic amblyopia was present in 1, combined anisometropia and strabismus in 3, strabismic amblyopia in 5, and stimulus deprivation amblyopia in 3. All patients had conventional patching for a mean period of 14 months, followed by atropine penalization in nine patients for a mean period of 4 months. The mean duration of OCL use ranged from 2 weeks to 6 months. There were nine patients with visual improvement (75%). The mean improvement seen was 0.4 log of the minimum angle of resolution. There was no occlusion amblyopia. Four patients had conjunctivitis; one had a peripheral corneal abrasion.

CONCLUSION:

The OCL is a useful adjunct in the treatment of amblyopia that is refractory to conventional treatment. The side effect profile is acceptable, but patients require close monitoring.
Low-vision intervention for oculocutaneous albinism in a Tertiary Eye Care Hospital in India
Authors: Gopalakrishnan Sarika , Negiloni Kalpa , Suganthan R Vivek , Velu Saranya , Raman Rajiv
Published: March 2023

PURPOSE:

The objective of this study on patients with albinism in different age groups was to compare their level of visual impairment with the low-vision intervention (LVI) and its benefit.

METHODS:

The medical records of 72 patients with low vision secondary to albinism who were referred to the low vision care clinic from 2015 to 2017 were analyzed. This included the demographic profile such as age, gender, occupation, ocular history, visual acuity status, and type of low-vision device (LVD) preferred. The LVDs prescribed and its subsequent improvement was compared.

RESULTS:

In this data, 70 (97.2%) people had oculocutaneous albinism and 2 (2.8%) had ocular albinism. Majority of the patients had hyperopic astigmatism 42 (58.3%) and with-the-rule astigmatism 58 (93.5%). Presenting mean visual acuity for distance was noted to be 0.88 logMAR which improved to 0.83 logMAR with the help of spectacle correction. The most commonly prescribed LVD was a dome magnifier for 15 (34.9%) patients. In all the patients, there was statistically significant improvement (P < 0.05) in near vision with the help of LVDs.

CONCLUSION:

The study highlights the importance of appropriate LVI for each subdivided age group. Patients with albinism who have received medical and surgical treatment have no or a limited role in restoring useful vision.
La responsabilidad postcontractual: algunas consideraciones en torno a su configuración
Authors: Brantt María Graciela , Mejias Alonzo Claudia
Published: March 2023

La responsabilidad postcontractual carece de un tratamiento integral en nuestro ordenamiento jurídico. Este artículo tiene por objeto contribuir a la configuración de un régimen de la responsabilidad civil postcontractual a partir de la descripción de la problemática y de los principales elementos que deberían considerarse para avanzar en dicho cometido. En su desarrollo se ha empleado el método dogmático y el recurso al derecho extranjero para abordar sus aspectos más relevantes: su delimitación temporal, contenido y naturaleza jurídica. El resultado principal de este trabajo es proporcionar los lineamientos fundamentales que permitirían avanzar en la construcción de un régimen de responsabilidad postcontractual.
On local energy decay for solutions of the Benjamin–Ono equation
Authors: Freire Ricardo , Linares Felipe , Muñoz Claudio , Ponce Gustavo
Published: March 2023

We consider the long time dynamics of large solutions to the Benjamin–Ono equation.
Using virial techniques, we describe regions of space where every solution in a suitable Sobolev
space must decay to zero along sequences of times. Moreover, in the case of exterior regions, we
prove complete decay for any sequence of times. The remaining regions not treated here are essentially the strong dispersion and soliton regions.
Energy‐efficient semi‐supervised learning framework for subchannel allocation in non‐orthogonal multiple access systems
Authors: Devipriya S. , Martin Leo Manickam J. , Victoria Jancee B.
Published: March 2023

Non‐orthogonal multiple access (NOMA) is considered a key candidate technology for next‐generation wireless communication systems due to its high spectral efficiency and massive connectivity. Incorporating the concepts of multiple‐input‐multiple‐output (MIMO) into NOMA can further improve the system efficiency, but the hardware complexity increases. This study develops an energy‐efficient (EE) subchannel assignment framework for MIMO‐NOMA systems under the quality‐of‐service and interference constraints. This framework handles an energy‐efficient co‐training‐based semi‐supervised learning (EE‐CSL) algorithm, which utilizes a small portion of existing labeled data generated by numerical iterative algorithms for training. To improve the learning performance of the proposed EE‐CSL, initial assignment is performed by a many‐to‐one matching (MOM) algorithm. The MOM algorithm helps achieve a low complex solution. Simulation results illustrate that a lower computational complexity of the EE‐CSL algorithm helps significantly minimize the energy consumption in a network. Furthermore, the sum rate of NOMA outperforms conventional orthogonal multiple access.
Young Children's Understandings of Clocks at the Start of School
Authors: MacDonald Amy , Murphy Steve
Published: March 2023

Time is an essential construct for understanding our everyday lives and the wider world; however, it is commonly seen as a difficult topic by teachers and children throughout primary school. There is limited research into children's learning about time, and in particular, concerning young children's understandings of clocks. This study examines the extent to which children are able to draw the structural features of a clock at the start of school. The drawings were produced by 132 Kindergarten children in their first six weeks of primary school. The drawings showed that the majority of the children started school with the ability to represent the structural features of a clock (numbers, hands, partitioning). Moreover, unlike previous studies, our analysis suggests that children's ability to represent clock structure does not progress sequentially. Rather, the drawings suggest that different children attend to different features of clocks, and thus have different developmental journeys.
Constructing-Evaluating-Refining Mathematical Conjectures and Proofs
Authors: Zeybek Simsek Zulfiye
Published: March 2023

This study focused on investigating the ability of 58 pre-service mathematics teachers' (PSMTs) to construct-evaluate-refine mathematical conjectures and proofs. The PSMTs enrolled in a three-credit mathematics course that offered various opportunities for them to engage with mathematical activities including constructing-evaluating-refining proofs in various topics. The PSMTs' proof constructions were coded in three categories as: Type P1, Type P2 and Type P3 in decreasing levels of sophistication (from a mathematical stand point) and the constructions of conjectures were coded in two categories as: Type C1: correct conjectures and Type C2: incorrect conjectures. In addition to classifying the PSMTs' proof and conjecture constructions, how they reacted when they needed to refine conjectures and proofs were also classified. Samples of classroom episodes were provided to exemplify these different proof-conjecture constructions-evaluations-refining processes. The results of the study demonstrated that the combined construction-evaluation-refining activities of conjectures and proofs were not only helpful to better illuminate the PSMTs' understanding of mathematical proofs, but they were also an essential instructional tool to help PSMTs comprehend mathematical ideas and relations.
Propensión de clientes en mercados populares para el comercio digital
Authors: Ferrer-Guerra Julián , López-Medrano Juan Carlos , Guerrero-Barrón Alejandro
Published: March 2023

El comercio electrónico ha sido propuesto como una alternativa al comercio tradicional presencial, especialmente a la vista de la pandemia de Covid 19. Este reporte presenta los resultados de un estudio realizado en mercados populares de la ciudad de Celaya (México).  Se realizó una encuesta a 250 clientes de comercios tradicional al detallista, utilizando como referencia el modelo de Peña-Nieto basado en los modelos de aceptación de la tecnología de amplia utilización en el campo hasta la fecha, orientado hacia la intención de compra en línea. Los resultados muestran que el modelo propuesto influye de manera significativa y conjunta en sus siete dimensiones como predictores de la intención de uso. De manera individual las dimensiones de actitudes y auto eficacia presentan significancia estadística como predictores de la intención de compra en línea. El estudio permite determinar las variables que impactan en la decisión de compra de los usuarios, aún y cuando no tengan experiencia previa en comercio electrónico. El estudio permite comprobar que los clientes de bajo ingreso, como lo representa este tipo de mercados, pueden ser propensos a compras en línea como alternativa al comercio tradicional
Analisa Peningkatan Efisiensi Daya Listrik Runway Edge Light Di Bandar Udara Minangkabau Dengan Lampu LED”
Authors: Caesar Akbar Muhammad , Saragi Andre
Published: March 2023

Runway lighting yaitu lampu yang dipasang sepanjang landasan pacu (runway) baik di pinggir maupun di tengah, lampu Runway juga dipasang pada akhir landasan pacu. Fungsi dari lampu Runway adalah memberi tuntunan kepada penerbang pada pendaratan dan tinggal landas pesawat terbang di siang hari pada cuaca buruk, atau pada malam hari. Dalam peningkatan efisiensi daya agar tidak terlalu besar pada bandar udara minangkabau. Maka dilakukan penggantian lampu Halogen ke Lampu LED dengan di tinjau dari beberapa faktor yang Lebih mengarah ke sisi positif di bandingkan sisi negative nya, Seperti dari life time lampu intensitas cahaya nya serta harganya yang lebih terjangkau. Saat ini bandara udara minangkabau belom melakukan pergantian lampu runway yang berjenis halogen menjadi LED dikarenakan faktor umur ekonomis fasilitas runway di bandar udara minangkabau sudah terpenuhi. Salah satunya lagi dikarenakan biaya, dalam melakukan pergantian terhadap lampu runway memiliki biaya yang cukup mahal sesuai dengan lampiran.
Damage Analysis of Propeller Blade P/N R815505 with Root Cause Failure Analysis Method on ATR 72 Aircraft
Authors: Nurfauzi Egi , Riyanti Lilies Esthi , Shakti Arrafat Bhima
Published: March 2023

The propeller blade is a component that is the main source of thrust on the ATR 72 aircraft. Based on data from the Aircraft Flight Maintenance Log (AFML) for the period 2019 – 2021 ATR 72 aircraft, the propeller blade component was damaged causing the need for unscheduled removal which had impact losses to airlines such as delays and aircraft-on-ground (AOG). This study aims to find the root causes of damage to the propeller blade components. Analysis was carried out using the Root-Cause Failure Analysis (RCFA) method using fault tree analysis (FTA) and fishbone diagrams as tools so that factors related to propeller blade damage will be found. The results of analysis using fault tree analysis (FTA) and fishbone found that the root cause of damage to the propeller blade was in the area of ​​the heating element (de-icer) as the top event, while the propeller blade operation, propeller blade maintenance and the ATR 72 aircraft operating environment were the intermediate events
New Drug Development strategies with special reference to the endocarp of multifaceted agriculture crop – Cocos nucifera Linn
Authors: V Sreekala , K. N Dwivedi , Singh Santosh Kumar
Published: March 2023

Coconut shell botanically represents the hard endocarp from the fruit of Cocos nucifera Linn. It is the usually discarded part of the plant with folklore claim in metabolic disorders.Being an inexpensive and easily availablenatural product with ethno medicinal significance, it seems highly relevant to scientifically validate the pharmaceutical implications of the drug. Till date, the new drug development strategies based on quality and efficacy parameters for the crude drug sample of Coconut shell has not been developed. The present study was intended to develop and scientifically validate the quality, purity, safety, potency and efficacy parameters of Coconut shell and thereby exploring the new drug development strategies for the drug. Materials andmethods: The study focused on the screening ofCoconut shell based on macroscopic, microscopic, organoleptic, histo-chemicaland HPTLC studies. Results:Characteristic presence of thin walled fibres, fibrosclereids,lignins and tannins were observed in themicroscopic analysis of Coconut shell. HPTLC studies also exemplifiedthe detailed bioactive chemical profile of Coconut shell.Conclusion: The study outcome suggestsCoconut shell as a novel reliable source of bioactive phytoconstituents with broad prospective in new drug development process.
Ethnopharmaceutical importance of under-explored plant species Hyptissuaveolens (L.)
Authors: Rajani Srivastava  , Shreya Pandey  , Ambrish Kumar Singh
Published: March 2023

Plants store a variety of important secondary metabolites with pharmacognostic and pharmacological implications, some of which have the potential to become super medicines in the future. In-vivo generation of these metabolites is influenced bya number of biotic and abiotic factors resulting in a constant accumulation of various phytochemicals and their derivatives that could be relevant in future medication research and development. There are over 70,000 plant species are employed ethnomedicinally in various ancient medical systems such as Ayurveda, Siddha, and Unani, as well as in Allopathy. The goal of this study is to look into the therapeutic potential of secondary metabolites as well as the probable pharmacological and pharmacognostic significance of the under-explored/underutilized plant Hyptissuaveolens (L.) Poit.Almost all parts of this plant are being employed in conventional drug to treat various diseases. It has been reported that it shows protection against peptic ulcer diseases and has anti-cancerous properties. The leaves of Hyptissuaveolenssecreted essential oil by hydrodistillation have been linked to the genus Hyptis' broad range of biological activity. It contains phytochemicals like alkaloids, tannins, saponins, flavonoids, terpenoids, minerals (like calcium, magnesium, sodium) and metals (like zinc and iron). The ursolic acid found in H. suaveolens can be used as a COVID-19 virus treatment agent. In addition, the ethnobotanical study claims that the beneficial plant has neuroprotective, antioxidant, antibacterial, antidiarrhoeal, anthelmintic, anti-inflammatory, wound healing, insecticidal, antimitotic, anti-proliferative, antisecretory, hepatoprotective, and acaricidal properties. The phytochemicals and extracts obtained from the plant have a great deal of therapeutic promise. As a result, we can use this plant for a variety of purposes.
Evidence of practice of Nutraceuticals/ Functional foods in our daily life described in Ayurveda
Authors: Samiksha Rai  , Vandana Verma
Published: March 2023

Ayurveda Scholars has considered food (Ahara) as an important pillar for development, sustenance of a healthy life and longevity. Considering the importance of food in health and disease.Charak has mentioned that the health or state of disease depends on rationale use of food. Food has been also considered as an etiological factor of several disorder as well as management and prevention of diseases. Ayurveda has given the comprehensive classification of food that are described in respect of their rasa(taste), vīrya(potency), vipāka (taste after digestion) and prabhāva (special actions) under the chapter Annapana Vidhi Adhyaya of Charak Samhita e.g. corn with spike/awn, corn with pods/legumes, pulses, meat, leaf, fruits, greens, leafy vegetables, wine, water, milk, products of sugar cane juice. In the mid of 1980s the term ‘functional food’ was coined in Japan to refer the food substances which have additional special health benefits. Spices and condiments which are commonly used in every kitchen on regular basis during different cooking preparations such as turmeric, ginger, garlic, onion, coriander, cinnamon, cumin, clove, fennel, barley, Indian gooseberry, tulsi, aloe vera etc. has been described in Ayurveda thousands year back with their special health benefits. In India there are number of traditional products used as functional food but needs more scientific validation, it could be a research opportunity in nutrition to explore the relation between certain diseases and these food components.Functional foods provide great potential for prevention of several chronic diseases, when consumed in balanced proportion in food preparations with a healthy lifestyle.
Role of kshara (an alkali preparation) in wound healing with special reference to cervical erosion
Authors: Pragati Saxena  , Anuradha Roy  , Binay Sen
Published: March 2023

Cervical erosion is caused by the replacement of the stratified squamous epithelium of the ectocervix with the endocervical columnar epithelium. In Ayurvedic classics, it can be co-related to garbhashayagrivagatavrana. Its management mainly includes destruction of overgrown epithelium by different techniques has its own limitations and side effects. Further observing its prevalence there is a requirement for a treatment modality which is more efficient and cost-effective. Kshara which possesses lekhana (scrapping), vrana-shodhana (wound cleansing), and ropana (wound healing) properties as described in Ayurveda, provides a scientific background of the therapeutic application in the management. Different review works revealed the potential use of kshara on wound healing due to its alkalinity which maintain the body pH within the normal range and thus maintains different cellular and extracellular function. Therefore, kshara is found to be an important preparation that has been investigated for its gynecological uses by different scholars.
Some Biochemical Parameters of Eggplant Species from Turkey and Nigeria
Authors: MUKHTAR Zulaiha Gidado , ÖZER Dursun , KARATAŞ Fikret , SAYDAM Sinan
Published: March 2023

In this study, the amounts of vitamins, beta-carotene, lycopene, glutathione (GSH, GSSG), malondialdehyde (MDA), and hydroxyneoneal (4-HNE) in eggplant samples grown in Turkey (dark and light colored eggplant) and Nigeria (white garden egg, bitter apple and bitter tomato) were determined by HPLC. In addition, the total amount of phenolic, and flavonoid substances and antioxidant capacity (ABTS, IC50) were determined by a UV-Visible spectrophotometer. The amounts of vitamins A, E, β-carotene and lycopene were found to be in the ranged of 0.13 -3.63; 3.63-39.0; 1.87-30.5; 1.52-6.79 µg/g dw, respectively. The amounts of vitamin C, B1, B2, B3, B5, B6, B9 and B12 ranged 357-1136; 11.0-95.6; 1.9-5.4; 83-265; 30.16-65.43; 127-348; 24.74-78.6; 0.11-0.68 µg/g dw, respectively. GHS, GSSG, MDA and 4-HNE were found to be in between 364-1930; 225-962; 1.5-8.4; 24.57-38.25 µg/g dw, respectively. While the total phenolic substance was between 706-1260 µg GAE/g dw, the total amount of flavonoid substance was found to be in between 167-356 µg QE/g dw. ABTS values ranged between 365-692 µmol Troloxs/g dw, while IC50 values were in 65.1-99.3 µg/mL. It can be said that the differences observed in the parameters observed in eggplant varieties grown both in Turkey and Nigeria are due to genetic and geographical differences.