Marked Absence Research Articles

Exceptional preservation of large fossil vertebrates in a volcanic setting (Camp dels Ninots, Spain)

ABSTRACT The taphonomic study of two complete and anatomically connected individuals of Tapirus arvernensis from the Pliocene site of Camp dels Ninots (Caldes de Malavella, Spain) strengthens the attribution to a konservat-Lagerstätte deposit. The macroscopic analysis showed the absence of weathering, predation marks, and scarce superficial modification. Different surface colourations have been observed, highlighting white alteration. A selection of samples was analysed through ESEM-EDX, XRD and FTIR. Results suggest preservation of histological features and absence of microtunneling associated with biotic digestion of bioapatite. Specific white alteration of bone surfaces are attributed to a slightly different phase of the bone apatite, with higher crystallinity index and heavier loss in biogenic carbonates. Together with the presence of silicon-rich crusts and infillings that cover bone surfaces, it is now suspected that some interference of the volcanic activity that occurred in the past could have been responsible for an optimal preservation of the osteological material. A slow remineralisation could have been caused by hydrothermal activity still active in the area that caused the absence of bacterial activity in a lacustrine context and left the specimens undisturbed. These results could proportionate new data to understand fossil diagenetic mechanisms that could potentially allow exceptional preservation in maar contexts.

The Child in the Colloquial Speech: Thesaurus and its Fixation

The purpose of this study is to identify the main features of colloquiality and their specificity in children's discourse, to describe the problem of lexicographic fixation of children's thesaurus. The most typical manifestation of the redundancy of children's speech is reduplication. Words built on reduplication penetrate from children's discourse into the standard language and into other sociolects, acquiring new meanings. The analysis of lexicographic sources reveals a deficiency in the ideographic description of the child's world, the absence of the necessary lexicographic marks in dictionaries of a general type. Since the beginning of the 2000s, dictionaries of children's innovations and children's thesaurus have been published on the material of the Russian language, but for those studying foreign languages the absence of such ideographic dictionaries becomes an ethnographic gap that hinders intercultural communication.

Environmentally friendly, but behaviorally complex? A systematic review of e-scooter riders' psychosocial risk features.

IntroductionE-scooters have made a place for themselves on urban roads as an affordable, easy-to-use and environmentally friendly method of transportation. However, and partly because of their road behaviors and safety outcomes, e-scooter users have started to represent a focus of attention for transport planners and policymakers.AimThe present systematic review aims to target and analyze the existing studies investigating the psychosocial characteristics of e-scooter riders, focusing on their behavioral and risk-related features.MethodsFor this systematic review, the PRISMA methodology was used, which allows for the selection of suitable papers based on the study topic, in accordance with a set of pre-defined criteria and a search algorithm. A total of 417 indexed articles were filtered, resulting in only 32 eligible original articles directly addressing the issue. WOS, Scopus, NCBI, Google Scholar, and APA databases were used to create and test search techniques.ResultsAt the literature level, most of the existing studies are distributed in a few regions of the globe. At the user’s level, results show how e-scooters are most commonly used by young, highly educated, urban-dwelling males, usually for short trips. In regard to road behavior, individuals with the lowest degrees of risk perception remain more prone to engaging in risky road behaviors likely to increase their crash involvement. This might be worsened by the lack of normative e-scooter regulations (and their enforcement) in many countries, plus the marked absence of road training processes. As common limitations, it can be mentioned that 87.5% of these studies used self-report methods, while 59.4% had local coverage.ConclusionsThe findings of this systematic review endorse the growing need to develop and enforce traffic laws and training processes for e-scooter users. In addition, road safety education and training programs are highlighted by existing studies as potentially pertinent alternatives to increase risk perception, and reduce risky behaviors, road conflicts and crash likelihood among e-scooter riders.

PTEN Immunohistochemistry.

Intestinal neuronal dysplasia type B (IND B) is a complex entity involving the enteric nervous system, clinically manifested with constipation in infancy. Diagnosis has been established by histopathologic analysis of rectal biopsies. However, the criteria for the diagnosis have been questioned and modified, hindering diagnostic practice. To analyze the applicability of PTEN immunohistochemistry in the diagnosis of IND B and to compare with control cases and cases of Hirschsprung disease (HD). PTEN immunohistochemical expression was analyzed in colorectal samples from 29 cases of IND B and compared with 4 control cases and 6 cases of HD. The pattern of PTEN immunoexpression was analyzed in glial cells of the submucosal and myenteric nerve plexuses and in neural fibrils of the muscularis propria using a scoring system. Marked reduction or absence of PTEN expression was observed in glial cells of the submucosal nerve plexuses in all cases of the IND B group and in the myenteric nerve plexuses in 28 of 29 cases (96.5%). Lack of PTEN expression was detected in neural fibrils within the muscularis propria in 21 of 29 cases (72%) of the IND B group. PTEN expression was positive in the same neural structures of the control and HD groups. PTEN immunohistochemistry may be a valuable tool in the diagnostic evaluation of IND B. Lack of or reduction of PTEN expression in neural fibrils within the muscularis propria suggests that involvement of the neuromuscular junction may be a key event in the pathogenesis of the motility disturbance occurring in IND B.

Absence of Morphological Case and Gender Marking in Contemporary Hasidic Yiddish Worldwide

This paper demonstrates that the language of the post-War generations of adult Haredi (that is, strictly Orthodox), primarily Hasidic, speakers of Yiddish in the major Hasidic centers worldwide lacks morphological case and gender. Elicited spoken and written data from native Haredi speakers of Yiddish from Israel and the United States, aged 18–87, and limited additional evidence from Canada and Belgium, reveal a complete absence of distinction between masculine, feminine, and neuter genders as well as between the nominative, accusative, and dative cases. While some speakers make use of a variety of morphological definite determiner and attributive adjective forms, their use is not determined by case or gender distinctions. Most of the speakers in our study have an invariable determiner pronounced as /dɛ/ or /di/, whereas the earlier case and gender suffixes on attributive adjectives have been reanalyzed as a single attributive marker, /ɛ/. These findings are consistent with our previous work on the loss of case and gender in the Hasidic Yiddish of London’s Stamford Hill and support our proposal that the Yiddish spoken in (primarily Hasidic) Haredi communities can be considered a distinct variety of the language known as Contemporary Hasidic Yiddish.*

Osteohistological description of ostrich and emu long bones, with comments on markers of growth.

Ostriches and emus are among the largest extant birds and are frequently used as modern analogs for the growth dynamics of non-avian theropod dinosaurs. These ratites quickly reach adult size in under 1 year, and as such do not typically exhibit annually deposited growth marks. Growth marks, commonly classified as annuli or lines of arrested growth (LAGs), represent reduced or halted osteogenesis, respectively, and their presence demonstrates varying degrees of developmental plasticity. Growth marks have not yet been reported from ostriches and emus, prompting authors to suggest that they have lost the plasticity required to deposit them. Here we observe the hind limb bone histology of three captive juvenile emus and one captive adult ostrich. Two of the three juvenile emus exhibit typical bone histology but the third emu, a 4.5-month-old juvenile, exhibits a regional arc of avascular tissue, which we interpret as a growth mark. As this mark is not present in the other two emus from the same cohort and it co-occurs with a contralateral broken fibula, we suggest variable biomechanical load as a potential cause. The ostrich exhibits a complete ring of avascular, hypermineralized bone with sparse, flattened osteocyte lacunae. We identify this as an annulus and interpret it as slowing of growth. In the absence of other growth marks and lacking the animal's life history, the timing and cause of this ostrich's reduced growth are unclear. Even so, these findings demonstrate that both taxa retain the ancestral developmental plasticity required to temporarily slow growth. We also discuss the potential challenges of identifying growth marks using incomplete population data sets and partial cortical sampling.

Analysis of Gender Pronoun Errors in Korean Speakers’ English Speech

Since the Korean pronoun system does not specify gender indication, Korean speakers of English tend to have difficulties when they use English pronouns. This paper explores how absence of obligatory gender marking in Korean affects gender errors in the production of English. Gender pronoun errors made by Korean learners of English were analyzed using recordings of English conversations of seven Korean subjects. Findings of this study revealed that Korean English learners struggled with the use of gender pronouns due to differences in gender pronoun systems between Korean and English. Both gender-neutrality and pro-drop practices do not require Korean speakers to pay close attention to gender factors when using pronouns in their native language, resulting in native language interference. Considering that the Korean language lacks specific gender orientation in its usage of pronouns whereas English requires clear gender specification, findings of this study imply that native language gender concept can influence second language use.

Crocodylian and dinosaur trace fossil assemblages from crevasse splay/levee and floodplain lake environments: middle Cenomanian Dunvegan Formation, northeast British Columbia, Canada

ABSTRACT Delta-plain strata of the Cenomanian Dunvegan Formation, in north-east British Columbia, represent anastomosed rivers that were flanked by vegetated crevasse splays, wetlands and shallow lakes. These rocks preserve a rich record of ankylosaur and ornithopod walking and wading tracks, as well as crocodylian swim traces and tracks. Analysis of depositional, erosional, and trace-making events reveals alternating phases of flooding and emergence that controlled both animal activity (walking, wading, swimming) and mud substrate consistency (firm vs. soupy), and hence fidelity of track preservation. Some tracks resemble those produced by both ankylosaurs and crocodylians, and confident attribution is difficult. The absence of tail drag marks suggests an ankylosaur trackmaker, whereas prominent claw marks might favour a crocodylian origin. Unusually large crocodylian swim traces suggest animals about 9 m, and possibly up to 12 m in length. These large traces may represent a precursor to the giant crocodylian Deinosuchus. Ankylosaur tracks are well-preserved in lake and channel-margin deposits, whereas crocodylian traces are most commonly preserved in firm muddy lake sediments that had experienced previous subaerial exposure and dewatering. Close integration of trace fossils with sedimentary and stratigraphic features makes it possible to reveal a detailed chronology of biotic and sedimentary events on palaeo-surfaces.

Multispecies Cities: Solarpunk Urban Futures

Multispecies Cities: Solarpunk Urban Futures

Toward a generic framework of perceived negative manager/leader behavior: A comparative study across nations and private sector industries

AbstractReviewing three relevant streams of extant literature reveals a marked absence of a generic framework composed of a full range of negative manager/leader behaviors (from moderate to extreme) across sectors and countries, a void particularly detrimental to the effectiveness of management and leadership development (MLD) programs. To address this concern, we conduct a multiple cross‐case/cross‐nation comparative analysis (MCCA) of data collected from our own 13 previous empirical replication studies (using the critical incident technique) of effective/ineffective managerial/leader behavior across nine culturally diverse countries and varied private sector industries, resulting in a comprehensive framework of perceived negative manager/leader behavior. Our generic framework is composed of five behavioral dimensions: inadequate functional behavior, unethical behavior, impersonal domineering behavior, depriving behavior, and closed/negative‐minded behavior, and lends support to the universal school of culture in business literature by showing that neither national culture nor sectorial specificities influence people's perceptions of negative manager/leader behavior. It also stresses the importance of the mundane (as opposed to the glorious) in managerial/leadership work by revealing that employees' perceptions of negative manager/leader behavior include not only conspicuously “bad” behaviors but also less conspicuous “poor” behaviors.

Comparative Evaluation of Sequential and Parallel Methods for Identifying Measurements of Nearby Objects

The paper proposes the comparative evaluation of sequential and parallel methods for identifying measurements of nearby objects. The problem statement is choosing the method for identifying measurements of nearby objects. The decision rule for identifying the results of radio engineering measurements of the coordinates of objects is obtained. The decision rules for identifying objects by sequential and parallel methods under various conditions are obtained. The cases of absence and presence of false marks from nearby objects are considered. The task of choosing serial or parallel methods for identifying measurements from nearby objects was set. The comparative evaluation of serial and parallel measurement identification methods is provided. As an indicator of the effectiveness of the methods, we chosen the probability of identification error. We estimated the probability of identification error depending on the relative average distance between objects in the absence of false measurements and in their presence. It is determined that the probability of an identification error when using the parallel identification method is less than when using the sequential identification method. This gain increases as the average relative distance between objects decreases. Based on the analysis of methods for identifying measurement results, it was found that the most appropriate identification method is a parallel method for identifying measurement results. The efficiency of the method increases with decreasing relative average distance between objects. Keywords— evaluation, sequential method, parallel Method, identification, measurement, nearby object, hypothesis

Bioindicators of severe ocean acidification are absent from the end-Permian mass extinction

The role of ocean acidification in the end-Permian mass extinction is highly controversial with conflicting hypotheses relating to its timing and extent. Observations and experiments on living molluscs demonstrate that those inhabiting acidic settings exhibit characteristic morphological deformities and disordered shell ultrastructures. These deformities should be recognisable in the fossil record, and provide a robust palaeo-proxy for severe ocean acidification. Here, we use fossils of originally aragonitic invertebrates to test whether ocean acidification occurred during the Permian–Triassic transition. Our results show that we can reject a hypothesised worldwide basal Triassic ocean acidification event owing to the absence of deformities and repair marks on bivalves and gastropods from the Triassic Hindeodus parvus Conodont Zone. We could not, however, utilise this proxy to test the role of a hypothesised acidification event just prior to and/or during the mass extinction event. If ocean acidification did develop during the mass extinction event, then it most likely only occurred in the latest Permian, and was not severe enough to impact calcification.

Beyond the Problem of Bone Surface Preservation in Taphonomic Studies of Early and Middle Pleistocene Open-Air Sites

A commonly identified problem in open-air sites is the poor preservation of bone surfaces because of the multiple agents and processes that act on them. In these assemblages, surface modifications of anthropic origin can be scarce or null, and its activity is mainly inferred through the stone tools and evidence of anthropogenic breakage. Carnivore activity is also frequent. La Mina and El Forn (Barranc de la Boella), Isernia La Pineta, and Torralba are open-air assemblages from the Early and Middle Pleistocene that have contributed to our knowledge of the activities that Lower Paleolithic hominins developed in open spaces. These sites show poorly preserved bone surfaces, evidence of carnivore activity, and few indications of human use on the faunal remains, although stone tools recovered are unequivocal sign of a hominin presence at those sites. Here, we present a synthesis of the taphonomic conducted at these sites with the aim of describing how this kind of work can be conducted at Paleolithic open-air sites using several different proxies, considering the limitations commonly identified in assemblages with poorly preserved bone surfaces. The absence or scarcity of cut marks could be related to the poor preservation of the faunal remains. However, it is impossible to affirm that any such marks were originally present, as hominins may have performed activities not linked to animal carcasses. Anatomical profiles have been presented as a useful tool for reconstructing the paleoecological environments and for allowing inferences to be made about the levels of competition among large predators. The assemblages reflect similarities in the deposition type of the remains and the use of these open spaces by hominins at different times during the Lower Paleolithic.

Fire and Climate: Connecting the Dots in British Columbia News Media

Background: Extreme weather events are intensifying with climate change, offering opportunities to raise the public urgency of this issue. The media’s role in communicating this connection is crucial. Analysis: This article analyzes media coverage of wildfires over a nine-year period in British Columbia focusing on how they are linked to climate change, in particular, during the 2017 and 2018 record-breaking fire seasons. Conclusion and implications: In media coverage in British Columbia, there is a marked absence of a link between climate change and wildfires and a tendency for connections to be tokenistic, decontextualized, and normalizing. More provocative narratives developed by various public figures that locate wildfires within broader narratives of climate crisis offer more compelling accounts.

Child Heritage Language Development: An Interplay Between Cross-Linguistic Influence and Language-External Factors.

The current study investigated the mechanisms of heritage language (HL) development with a focus on case morphology. First, the effects of cross-linguistic influence (i.e., the influence of the properties of the societal language (SL) on the acquisition of the HL) was assessed by performing bilingual vs. monolingual, and between-bilingual group comparisons (Russian–Dutch vs. Russian–Hebrew bilinguals). Russian, Hebrew, and Dutch show differences in the marking of the accusative (ACC) and genitive (GEN) cases, and these differences were used as a basis for the evaluation of cross-linguistic influences. Second, the study evaluated the contribution of language-external factors such as chronological age, age of onset of bilingualism (AoO), languages spoken by the parent to the child (only HL, only SL, both HL and SL), and family language type (both parents are HL speakers, mixed families). Finally, we assessed how language-external factors might potentially mitigate the effects of cross-linguistic influences in bilinguals. Russian-Dutch bilinguals from the Netherlands (n = 39, MAGE = 5.1, SD = 0.8), Russian-Hebrew bilinguals from Israel (n = 36, MAGE = 4.9, SD = 0.9) and monolingual Russian-speaking children (n = 41, MAGE = 4.8, SD = 0.8), along with adult controls residing in the Russian Federation, participated in the study. The case production of ACC and GEN cases was evaluated using elicitation tasks. For the bilinguals, the background data on individual language-external factors were elicited from the participants. The results show that case morphology is challenging under HL acquisition—case acquisition in the HL is impeded under the influence of the properties of the SL. This is evident in the lower performance of both bilingual groups, compared with the monolingual controls who showed ceiling performance in the production of target inflection in the ACC and GEN contexts. More specifically, the acquisition of morphology is hindered when there are differences in the mapping of functional features (such as with Russian-Hebrew bilinguals) and/or the absence of this feature marking (such as with Russian-Dutch bilinguals). But the findings also point to the involvement of language-external factors as important mitigators of potential negative effects of cross-linguistic influence. In summary, HL development is an intricate interplay between cross-linguistic influence and language-external factors.

Analysis of results of investigation tests of the developed information and measuring active safety system of the vehicle

The research objective is the analysis of results of investigation tests of the information and measuring active safety system developed by FSUE “NAMI”. The practice of operation and performed studies show that modern foreign advanced driver assistance systems do not provide appropriate functioning under severe road and climate conditions of the Russian Federation creating unjustified risks and precluding from preventing a significant number of road accidents. This statement is applicable to driving on slippery surfaces, ice and snow, to the driving mode in traffic jams, in the absence of recognizable road marking, blinding of video cameras, insufficient visibility range and road lighting, etc. In order to ensure competitive ability and commercial attractiveness of the developed domestic information and measuring active safety system, within the scope of this work additional studies were performed regarding improvement of driver status monitoring functions with an expanded vector of the state of the controls and speed range, tire pressure monitoring with an expanded speed range and start-stop driving mode, dangerous obstacle approach warning and detection of deviation from the center of the lane with unrecognizable marking. In this paper, the results of investigation tests of improved functions are considered.

Distance-based confidence generation and aggregation of classifier for unstructured road detection

Road region and non-road region separation in the unstructured road intends to be an important task for safe navigation and collision avoidance for autonomous driving vehicles. The road that connects rural areas and cities to the national highways are considered as unstructured roads. Absence of clear lane marking on these unstructured roads makes them more prone to accidents in comparison to highways, which have clear lane marking for indication of road and non-road regions. However, the unstructured roads have different color information from its background that paves an easy way for design and development of an efficient road detection system for recognition and classification of road and non-road regions. Hence, in this paper, we propose an efficient road detection system for the classification of unstructured roads into road and non-road regions using multiple nearest neighbors (NN) classifier and soft voting aggregation approach. The proposed system utilized the chromatic information (i.e. *a,*b, and Hue) to train the NN classifiers and aggregated their output using soft voting (SV) approach for final output response. The output results of multiple classifiers were aggregated using SV approach based on the confidence score obtained by each individual classifier.The performance of the proposed system is evaluated in terms of precision, recall, accuracy, intersection over union (IOU), true positive rate (TPR), and processing time and compared with current state of art methods reported in the literature. The proposed system achieved precision, recall, accuracy, IOU, and TPR of 96.79%, 96.92%, 97.8%, 96.08% and 96%, respectively with the processing time three times smaller than those of the existing state of art methods. The experimental results demonstrate that the proposed system can provide an effective guidance to the autonomous vehicles through recognition and classification of road and non-road regions in rural, urban, and city areas, wherein single unstructured roads connect the national highways.

Modelling the effects of the repellent scent marks of pollinators on their foraging efficiency and the plant-pollinator community.

Pollinator insects forage in complex and unpredictable resource landscapes, often using social information from congeneric individuals to acquire knowledge about their environment. It has long been recognized that this process allows them to exploit floral resources more efficiently and thus increase individual fitness. However, by creating correlations between the behaviors of pollinators within a population, this could also indirectly influence the entire plant-pollinator community. One type of social information used by pollinators is the scent mark left on the corolla of flowers by previous visitors, which can be used as a cue to avoid recently depleted resources. We developed a spatially explicit agent-based model to examine the effects, at both individual and community levels, of pollinators using these scent marks. The model simulates a population of pollinators foraging on flowers in a continuous 2D space in which we can vary the density of pollinators. We showed that the use of scent marks as a source of information significantly increased the foraging efficiency of pollinators except when competition between pollinators was very low. At the community level, this also resulted in a marked homogenization between floral resources within the landscape: in the absence of scent marks, the coefficient of variation of the remaining nectar quantity per flower strongly increased with greater pollinator competition, but it remained low at all levels of competition when scent marks were used by the pollinators. Finally, the use of scent marks markedly decreased the number of pollinator flower visits, especially at high levels of pollinator competition, which can potentially reduce the pollination service.

Jacques Ellul: A Companion to His Major Works

Jacques Ellul: A Companion to His Major Works

A new look at Crocodylopodus meijidei: implications for crocodylomorph locomotion

ABSTRACT A review of the type material of the crocodylomorph ichnotaxon Crocodylopodus meijidei Fuentes Vidarte and Meijide Calvo, 2001 from the Berriasian of Spain is carried out. The review allows a better characterization of this type ichnotaxon and provides interesting new data on the candidate trackmakers and especially on their locomotion. Three different size classes possibly related to different ontogenetic states or sexual dimorphism of the same small- to medium-sized crocodylomorph trackmaker are distinguished. Morphological differences within the sample such as digital impression lengths might be a consequence of differences in allometric growth, assuming similarities with extant crocodylians. Other differences are a consequence of variation in the morphological quality and mode of preservation across the sample. Some trackway features (intermediate-gauge trackways with high pace angulation, absence of tail, belly or drag marks) indicate the trackmakers, presumed neosuchian crocodylomorphs, were walking in a ‘high-walk’ mode with a semi-erect posture at a moderate speed. The trackmaker may have walked with more erect limb posture and with the center of mass located more anteriorly than occurs in extant species, albeit not as erect as quadrupedal animals such as mammals or other extinct archosaurs including trackmakers of other crocodylomorph ichnotaxa (e.g., Batrachopus).