Communication Calls Research Articles

ESL Teachers’ Perceptions towards Teaching the Four Skills for Developing Learners’ Communicative Abilities for Ordinary Secondary Schools: Do Learning Objectives Matter?

Country wide, studies on oral language skills in relation to students’ communicative competence are relatively scanty. These studies focused on testing and performance with less attention to oral language skills instruction. Hence, leaving a knowledge gap. Therefore, previous studies did not consider whether oral skills are included in teaching and learning in ESL classes. The findings reveal that effective teaching of language as communication calls for an integrated approach which represents different skills and abilities as aspects of as a single underlying activity. The present study was descriptive in nature. The study used mixed research approach. The study was conducted in Simiyu region, specifically, Bariadi district. The study used purposive sampling technique. The study used total population sampling which included 100 respondents. Only 75 respondents participated in questionnaires and focus group discussion. Thematic and content analysis were used in analyzing the data. The findings concluded that teaching ESL in ordinary secondary schools does not base on the teaching and learning objectives as prescribed in the 2010 syllabus for developing learners’ communicative competence. The contributing factors include the negative impact of assessment. This means that both internal and national examinations do not test or assess students in terms of mastery of oral language skills. Also, teaching methods especially integrated-skills approach that is suggested to be used when teaching the four skills is not used at all. Therefore, the present study recommends that there is a need of change of both teaching/learning methods, materials, time and assessment objectives so as to meet the intended goals of teaching ESL in ordinary secondary schools in Tanzania

Bats expand their vocal range by recruiting different laryngeal structures for echolocation and social communication.

Echolocating bats produce very diverse vocal signals for echolocation and social communication that span an impressive frequency range of 1 to 120 kHz or 7 octaves. This tremendous vocal range is unparalleled in mammalian sound production and thought to be produced by specialized laryngeal vocal membranes on top of vocal folds. However, their function in vocal production remains untested. By filming vocal membranes in excised bat larynges (Myotis daubentonii) in vitro with ultra-high-speed video (up to 250,000 fps) and using deep learning networks to extract their motion, we provide the first direct observations that vocal membranes exhibit flow-induced self-sustained vibrations to produce 10 to 95 kHz echolocation and social communication calls in bats. The vocal membranes achieve the highest fundamental frequencies (fo's) of any mammal, but their vocal range is with 3 to 4 octaves comparable to most mammals. We evaluate the currently outstanding hypotheses for vocal membrane function and propose that most laryngeal adaptations in echolocating bats result from selection for producing high-frequency, rapid echolocation calls to catch fast-moving prey. Furthermore, we show that bats extend their lower vocal range by recruiting their ventricular folds-as in death metal growls-that vibrate at distinctly lower frequencies of 1 to 5 kHz for producing agonistic social calls. The different selection pressures for echolocation and social communication facilitated the evolution of separate laryngeal structures that together vastly expanded the vocal range in bats.

Workers perception of and coping with the health risks of informal electronic waste recycling in Ghana

ABSTRACT Electronic waste (e-waste) contains heavy metals, which pose enormous human health risks if not properly handled. Evidence shows that the unsafe and crude practices at recycling sites expose workers to several short – and long-term health risks. Considering that different activities pose different risks, this paper examined the health perceptions and attitudes of workers along the e-waste treatment continuum in two informal recycling sites in Ghana; Agbogbloshie (Accra) and Dagomba Line (Kumasi). Using semi-structured interviews with 255 workers, the findings show that workers generally are aware of the “physical” risks associated with their practices but perceived the associated health risks as a normal incident, which required no intervention. Cases of cuts, headache, burns, dizziness, fatigue and muscle pains were the most reported ailments. Knowledge of health risks was obtained by chance and was not activity-dependent. Few of the workers generally use of personal protective equipment (PPE) and adopted safe recycling methods. The use of PPE was influenced by several factors but most importantly awareness of health risks and the type of activity a worker undertakes. This paper therefore calls for continuous training and risk communication on associated risks of unsafe practices and the need to use appropriate PPE.

Group polarization calls for group-level brain communication

Group of people shows the shift towards extreme of decision-making as opposed to individuals. Previous studies have revealed two directions of group polarization, i.e., risky shift and cautious shift, but how group of brains drive these shifts remains unknown. In the current study, we arranged risk advantage and disadvantage situations to elicit group polarization of risky shift and cautious shift respectively, and examined the averaged inter-brain synchronization (ABS) among participant triads during group decision making versus individual decision making. The elicited group polarizations were accompanied by the enhanced ABS at bilateral prefrontal areas and left temporoparietal junction (TPJ). Specifically, the TPJ ABS was equivalent in risky shift and cautious shift, and based on machine learning analyses, could predict the extent of group polarization; for two shifts, it negatively correlated with negative emotion. However, the right prefrontal ABS was stronger in risky shift than in cautious shift, and the same area showed the larger brain deactivation in former shift, indicating weaker executive control. For the left prefrontal ABS, only the equivalent ABS was found for two shifts. In sum, group polarization of risky shift and cautious shift calls for inter-brain communication at the group level, and the former shift is with deactivation and more brain synchronization. Our study suggests emotional and cognitive adjustment in decision making of the group compared with individuals.

The Science of Children’s Religious and Spiritual Development

The Science of Children’s Religious and Spiritual Development

A Hybrid Approach to Trust Node Assessment and Management for VANETs Cooperative Data Communication: Historical Interaction Perspective

Vehicular ad hoc networks (VANETs) provide self-organized wireless multihop transmission, where nodes cooperate with each other to support data communication. However, malicious nodes may intercept or discard data packets, which might interfere with the transmission process and cause privacy leakage. We consider historical interaction data of nodes as an important factor of trust. Thus, this paper focuses on the trust node management of VANETs, which aims to quantify node credibility as an assessment method and avoid assigning malicious nodes. First, the integrated trust of each node is proposed, which consists of the direct trust and the recommended trust. The former is dynamically computed by historical interaction records and Bayesian inference considering penalty factors. The latter defines trust by third-party nodes and their reputation. Second, the process of trust calculation and data communication calls for timeliness. Therefore, we introduce a time sliding window and time decay function to ensure that the latest interaction information has a higher weight. We can sensitively identify malicious nodes and make quick responses. Finally, the experimental results demonstrate that our proposed method outperforms bassline methods, especially with respect to the packet delivery ratio and security.

The prefrontal cortex of the Mexican free-tailed bat is more selective to communication calls than primary auditory cortex.

In this study, we examined the auditory responses of a prefrontal area, the frontal auditory field (FAF), of an echolocating bat (Tadarida brasiliensis) and presented a comparative analysis of the neuronal response properties between the FAF and the primary auditory cortex (A1). We compared single-unit responses from the A1 and the FAF elicited by pure tones, downward frequency-modulated sweeps (dFMs), and species-specific vocalizations. Unlike the A1, FAFs were not frequency tuned. However, progressive increases in dFM sweep rate elicited a systematic increase of response precision, a phenomenon that does not take place in the A1. Call selectivity was higher in the FAF versus A1. We calculated the neuronal spectrotemporal receptive fields (STRFs) and spike-triggered averages (STAs) to predict responses to the communication calls and provide an explanation for the differences in call selectivity between the FAF and A1. In the A1, we found a high correlation between predicted and evoked responses. However, we did not generate reasonable STRFs in the FAF, and the prediction based on the STAs showed lower correlation coefficient than that of the A1. This suggests nonlinear response properties in the FAF that are stronger than the linear response properties in the A1. Stimulating with a call sequence increased call selectivity in the A1, but it remained unchanged in the FAF. These data are consistent with a role for the FAF in assessing distinctive acoustic features downstream of A1, similar to the role proposed for primate ventrolateral prefrontal cortex.NEW & NOTEWORTHY In this study, we examined the neuronal responses of a frontal cortical area in an echolocating bat to behaviorally relevant acoustic stimuli and compared them with those in the primary auditory cortex (A1). In contrast to the A1, neurons in the bat frontal auditory field are not frequency tuned but showed a higher selectivity for social signals such as communication calls. The results presented here indicate that the frontal auditory field may represent an additional processing center for behaviorally relevant sounds.

The Culture of Student Debate: When not to Argue

Today public speaking as a form of communication calls for the development of actives ways of speaker’s interaction with the audience, with the audience taking on an increasingly active and meaningful participation. In the cultural environment of modern higher education, in universities, student debates are becoming one of the most relevant and popular activities. Basing on the assumption that debate is an effective tool for developing both communicative and speech skills of future professionals in any field of activity focused on social interaction, this study aims to investigate the specifics of the organizing and conducting debates to develop mastery, professionalism, and leader potential of students in the framework of the course of Russian as a second foreign language (RSL). With this approach in mind, we set the following objectives: 1) to clarify the main approaches to the meaning of oral communication and the role of debate in it for the formation of basic competencies of students today; 2) to study the structure of typical units of public speaking; 3) to identify problems students face in the process of verbal communication; 4) to substantiate the advantages of using debates for the development of the necessary general cultural, professional and communicative qualities and skills of a future professional. In its methodology, this study was based on the works in the field of the theory of communication, the language of business communication, the culture of speech, pedagogy, and methods of teaching the Russian language to non-native speakers. The research methods included surveys and interviews, as well as content analysis and case study methods. The study has proved that solving the pedagogical problems of fostering responsibility, independence, and proactive social attitude requires the development of general cultural, research and communication skills, and debates have proved to be an effective form of practicing these skills in the educational process. The communicative culture and the overall training of students for their future professional career means leadership development, and for this cause debates are an effective teaching tool.

Social Communication in Big Brown Bats

Bats are social mammals that display a wide array of social communication calls. Among them, it is common for most bats species to emit distress, agonistic, appeasement and infant isolation calls. Big brown bats (Eptesicus fuscus) are no different: They are gregarious animals living in colonies that can comprise hundreds of individuals. These bats live in North America and, typically found roosting in man-made structures like barns and attics, are considered common. They are insectivorous laryngeal echolocators, and while their calls and associated brain mechanisms in echolocation are well-documented, much less is known about their neural systems for analyzing social vocalizations. In this work we review what we know about the social lives of big brown bats and propose how to consolidate the nomenclature used to describe their social vocalizations. Furthermore, we discuss the next steps in the characterization of the social structure of this species and how these studies will advance both research in neuroethology and ecology of big brown bats.

Improving services for chronic non‐communicable diseases in Samoa: an implementation research study using the care cascade framework

ObjectiveSamoa needs to intensify the response to the growing non‐communicable disease burden. This study aimed to assess bottlenecks in the care continuum and identify possible solutions. MethodsThe mixed‐methods study used the cascade framework as an analysis tool and hypertension as a tracer condition for chronic non‐communicable diseases. Household survey data were integrated with medical record data of hypertension patients and results from focus group discussions with patients and healthcare providers. ResultsHypertension prevalence was 38.1% but only 4.7% of hypertensive individuals had controlled blood pressure. There were large gaps in the care continuum especially at screening and referral due to multiple socio‐cultural, economic and service delivery constraints. ConclusionsIn Samoa, care for chronic non‐communicable diseases is not effectively addressing patient needs. This calls for better health communication, demand creation, treatment support, nutritional interventions and health service redesign, with a focus on primary healthcare and effective patient and community engagement. Implications for public healthThe proposed actions can improve the reach, accessibility, quality and effectiveness of Samoa's chronic care services. Health system redesign is necessary to ensure continuity of care and more effective primary prevention. The findings are useful for other countries in the region facing similar challenges.

How the bat brain detects novel sounds (commentary on Wetekam et al., 2021).

How the bat brain detects novel sounds (commentary on Wetekam et al., 2021).

Common principles in the lateralization of auditory cortex structure and function for vocal communication in primates and rodents.

This review summarizes recent findings on the lateralization of communicative sound processing in the auditory cortex (AC) of humans, non-human primates and rodents. Functional imaging in humans has demonstrated a left hemispheric preference for some acoustic features of speech, but it is unclear to which degree this is caused by bottom-up acoustic feature selectivity or top-down modulation from language areas. Although non-human primates show a less pronounced functional lateralization in AC, the properties of AC fields and behavioural asymmetries are qualitatively similar. Rodent studies demonstrate microstructural circuits that might underlie bottom-up acoustic feature selectivity in both hemispheres. Functionally, the left AC in the mouse appears to be specifically tuned to communication calls, whereas the right AC may have a more 'generalist' role. Rodents also show anatomical AC lateralization, such as differences in size and connectivity. Several of these functional and anatomical characteristics are also lateralized in human AC. Thus, complex vocal communication processing shares common features among rodents and primates. We argue that a synthesis of results from humans, non-human primates and rodents is necessary to identify the neural circuitry of vocal communication processing. However, data from different species and methods are often difficult to compare. Recent advances may enable better integration of methods across species. Efforts to standardize data formats and analysis tools would benefit comparative research and enable synergies between psychological and biological research in the area of vocal communication processing.

Implications of wind and vessel noise on the sound fields experienced by southern resident killer whales Orcinus orca in the Salish Sea

The soundscape of critical habitat for southern resident killer whale (SRKW) Orcinus orca in the Salish Sea, the waters around southern British Columbia, Canada, and northern Washington State, USA, is shaped by wind and wave noise as well as heavy commercial and recreational vessel traffic loads. First, we used recordings from 6 passive acoustic moorings to characterize the acoustic landscape experienced by SRKW in this region, focusing on the frequencies used for communication and echolocation. Mid-frequency wind noise was prevalent in winter sound fields, whereas higher-frequency noise levels associated with increased numbers of recreational vessels increased during summer. Commercial vessel presence was consistent, with acoustic inputs prevalent in the western part of the study area. The potential implications of these additions on SRKW acoustics use were then explored for the frequency band 1-40 kHz to represent communication calls and at 50 kHz to consider echolocation. The inputs of wind were extrapolated from modelled hourly wind speed measures and commercial shipping noise. The noise impact was expressed as a proportional reduction of communication and echolocation extent compared to maximum acoustic ranges at ‘minimum ambient’ levels, void of vessel and abiotic noise. The reductions calculated were substantial, with the presence and impact of vessel noise greater than wind-derived additions and the greatest impacts around shipping lanes. Impacts were found for SRKW foraging areas, with implications for group cohesion and feeding success. This interpretation of the influence of natural and vessel noise more clearly demonstrates the potential implications of altered soundscapes for SRKW.

Perceived threats towards COVID-19 pandemic among Nepali migrant workers returned from India

Evidence shows that the seasonal migrants returned from India have been a source of COVID-19, which helped spread it across Nepal. This cross-sectional study, guided by the Health Belief Model (HBM) model, that people's underlying believes in this case around COVID-19, is determined by a large extend their subsequent behaviors. This study aimed to examine the association between personal characteristics and perceived threats regarding COVID-19 among 384 seasonal migrants who had returned from India and were staying in a quarantine center in Surkhet, Nepal. A questionnaire was used with the help of three health workers working in the Quarantine Center. A five-point sequential grade Likert scale was constructed based on two HBM constructs, like 'perceived susceptibility' and ‘severity.' A score ≥ of 50% was designated as high, and ≤ 50% as a perceived low level of threat. Univariate and bivariate analyses were performed to interpret the data using SPSS 20 version. Generally, participants regarded the threat of COVID-19 as low. The severity of COVID-19 was thought to be greater than the vulnerability of the subjects. Gender, age, caste, education, health status, and perceived susceptibility did not correlate with perceived susceptibility. However, the participants’ demographic characteristics were associated with their perceived level of severity. Therefore, this study calls for proper risk communication to people who returned from abroad, as this is essential in promoting protective behavior during a pandemic outbreak.

A new wind direction-driven heat convection model is needed in dynamic simulation: What, why, and how

Wind plays an essential role in the heat convection on building outside surfaces. In EnergyPlus, a dynamic simulation program, heat convection models present several limitations reported by the scientific community. However, this communication reveals and discusses some implications that highlight the importance of developing more accurate models. The current models are first analyzed to identify what are the pitfalls considering the influence of wind direction on the thermal performance of the building walls. Then, a discussion is made on why their implications are important and, lastly, it is suggested how wind direction-driven studies and new models can overcome this issue. Concluding, this communication calls for efforts from the scientific community to research and develop more accurate models for wind-driven surface convection.

Impact of COVID-19 on Antenatal Care Utilization Among Pregnant Women in Qassim, Saudi Arabia.

Background and objectivesCoronavirus disease 2019 (COVID-19) pandemic has affected routine service delivery which might affect antenatal care (ANC) utilization among pregnant women. This study aimed to assess the proportion of missed appointments among pregnant women in the Qassim region of Saudi Arabia during the COVID-19 pandemic.MethodsA facility-based cross-sectional survey was conducted among pregnant women admitted for delivery in Maternity and Children Hospital (MCH), Buraidah. Data were collected on socio-demographics, obstetric history, missed appointments and reasons for missing the appointment. Analysis was carried out in Statistical Package for the Social Sciences (SPSS), version 21.0 (IBM Corp., Armonk, NY). Medians with interquartile range (IQR) were presented for continuous variables and frequency and proportions for categorical variables. Logistic regression was used to assess the factors associated with the missed appointment.ResultsA total of 400 women were included in the study. About one-third (30%) of the women had missed at least one ANC appointment in their current pregnancy. The most common reasons for missing the appointments in primary care and hospitals, respectively, were: fear of infection 52% and 47%, facility not working usual 25% and 7.5%, fear of infection to child 19% and 17%. Family size and gravidity were the significant factors associated with missed appointments in our study.ConclusionsNearly one-third of women missed their ANC appointments during the COVID-19 pandemic. Major reasons were related to COVID-19 fear and its effect on services. This calls for proper health communication in the general population and delivering routine care with evidence-based guidelines to maintain continuity of care.

A Hybrid Model for Achieving Universal Safe Drinking Water in the Medium-Sized City of Bangangté (Cameroon)

Providing everyone with safe drinking water is a moral imperative. Yet, sub-Saharan Africa seems unable to achieve “safe drinking water for all” by 2030. This sad situation calls for a closer examination of the water supply options for both rural and urban populations. Commonly, two main aspects are considered: (1) behavioural responses to available or potential water supply options, and (2) socio-economic acceptability. These aspects determine the feasibility and the affordability of bringing safe drinking water as a basic good and human right to everyone. There is a broad consensus that achieving the UN Sustainable Development Goal 6.1 is mostly a financial issue, especially in low-income settings. This communication challenges this view as water is available everywhere and affordable treatment options are well-known. It considers the decentralized water supply model as a reference or standard approach in low-income settings rather than as an alternative. Here, the medium-sized city of Bangangté in the western region of Cameroon is used to demonstrate that universal safe drinking water will soon be possible. In fact, during the colonial period, the residences of the elite and the main institutions, including the administrative quarter, churches, and hospital, have been supplied with clean water from various local sources. All that is needed is to consider everyone as important or accept safe drinking water as human right. First, we present a historical background on water supply in the colonial period up to 1980. Second, the drinking water supply systems and water demand driven by population growth are discussed. Finally, a hybrid model for the achieving of universal access to clean drinking water, and preconditions for its successful implementation, are presented. Overall, this communication calls for a shift from safe drinking water supply approaches dominated by centralized systems, and presents a transferable hybrid model to achieve universal clean drinking water.

Acoustic Context Modulates Natural Sound Discrimination in Auditory Cortex through Frequency-Specific Adaptation.

Sound discrimination is essential in many species for communicating and foraging. Bats, for example, use sounds for echolocation and communication. In the bat auditory cortex there are neurons that process both sound categories, but how these neurons respond to acoustic transitions, that is, echolocation streams followed by a communication sound, remains unknown. Here, we show that the acoustic context, a leading sound sequence followed by a target sound, changes neuronal discriminability of echolocation versus communication calls in the cortex of awake bats of both sexes. Nonselective neurons that fire equally well to both echolocation and communication calls in the absence of context become category selective when leading context is present. On the contrary, neurons that prefer communication sounds in the absence of context turn into nonselective ones when context is added. The presence of context leads to an overall response suppression, but the strength of this suppression is stimulus specific. Suppression is strongest when context and target sounds belong to the same category, e.g.,echolocation followed by echolocation. A neuron model of stimulus-specific adaptation replicated our results in silico The model predicts selectivity to communication and echolocation sounds in the inputs arriving to the auditory cortex, as well as two forms of adaptation, presynaptic frequency-specific adaptation acting in cortical inputs and stimulus-unspecific postsynaptic adaptation. In addition, the model predicted that context effects can last up to 1.5 s after context offset and that synaptic inputs tuned to low-frequency sounds (communication signals) have the shortest decay constant of presynaptic adaptation.SIGNIFICANCE STATEMENT We studied cortical responses to isolated calls and call mixtures in awake bats and show that (1) two neuronal populations coexist in the bat cortex, including neurons that discriminate social from echolocation sounds well and neurons that are equally driven by these two ethologically different sound types; (2) acoustic context (i.e., other natural sounds preceding the target sound) affects natural sound selectivity in a manner that could not be predicted based on responses to isolated sounds; and (3) a computational model similar to those used for explaining stimulus-specific adaptation in rodents can account for the responses observed in the bat cortex to natural sounds. This model depends on segregated feedforward inputs, synaptic depression, and postsynaptic neuronal adaptation.

Communication Modes Used for Information Sharing in Construction Projects of Pakistan

The construction industry is characterized as complex, fragmented, dynamic, and involves many parties. Therefore effective communication for information sharing is essential to overcome these challenges. A comprehensive review of previously published literature and questionnaire survey was done to collect this study's data. 161 responses collected from contractors, consultants, and clients were analyzed statistically. The results of the analysis reveal that the practitioners prefer to use Email, Drawings (CAD), Phone Calls, WhatsApp, and Site Meetings for communication. However, they mention that in comparison, Letters (Written Documents and Reports), Stakeholder meetings, Drawing (CAD), Site Meetings, and Phone Calls are more effective communication tools. Based on the discussion, it is summarized that important modes of communication are Drawing (CAD), Phone Calls, Site Meetings, Emails, and WhatsApp, which help in proper understanding and fast mode of communicating the messages. The respondents suggested that the government introduce and enforce the law to adopt modern communication modes for improved communication systems. Also, the practitioner should be motivated to work with virtual environments such as BIM for achieving successful projects.

Improving Efficiency of Primary Care Provider Communication for Uncomplicated Admissions.

Communication between inpatient pediatric hospital medicine (HM) and primary care providers (PCPs) is important for quality care. As provider workload increases, it is important to focus on a means to improve communication efficiency. Our goal was to increase the percentage of HM admissions using 1-way communication from 0% to 35% over a 16-month period. HM providers and PCPs collaborated to identify 12 admission diagnoses for which 1-way communication could be used. Using quality improvement methods, we studied the implementation of "Leave a Message" (LAM) calls for 1-way communication and providing PCPs with the option to place a return call. Control charts were used to track LAM call use and balancing measures of PCP return phone calls, additional PCP communications, and 7-day readmissions over time. A total of 778 LAM calls were placed by HM providers over 16 months. The percentage of LAM calls out of all PCP calls placed ranged from 0% to 35% during this time, increasing significantly during winter months and before the coronavirus disease 2019 pandemic. Only 0.4% (n = 3) of LAM calls were returned by PCPs. Estimated PCP return phone calls were reduced by 11.1 calls per week. We created a system for 1-way telephone communication between HM providers and PCPs for common, simple admissions and reduced the need for PCP return phone calls. The low percentage of LAM calls returned by PCPs may suggest that 1-way communication is adequate for most simple admissions.