Temporal Reference Research Articles

The life cycles of counterfactual mood in early Indo-European languages

Abstract In this article, I argue that the counterfactual function of the optative was inherited from Proto-Indo-European and that its past-referring counterfactual function (e.g. in Vedic Sanskrit, Archaic Greek, and Gothic) seems to be the oldest preserved function of the optative in early Indo-European languages. In these and in languages where the optative underwent mood syncretism with other moods such as the subjunctive (e.g. Latin or Old English), the inherited counterfactual function extended its temporal reference to the non-past, following the life cycle of counterfactual markers. Over time, this mood, syncretized or not, lost its counterfactual function in most Indo-European descendants and was replaced by different mood formations at various speeds (typically by a past indicative or a past-like ‘conditional’ mood). First, I provide a functional history of the optative in Ancient Greek, from (1) past counterfactual to (2a) non-past counterfactual, and from there into (3a) non-past ‘hypothetical’ usage and from (1) past counterfactual into (2b) past habitual and (3b) past generic. Next, I internally reconstruct the developmental paths of the optative and its counterfactual replacements across Indo-European languages, concluding with a tentative diachronic typology of counterfactual mood strategies.

Characteristic of temporal light modulation reference meter and standard light source for calibration and verification

Abstract The measurement of the temporal light modulation (TLM) of a light source is gaining increasing importance owing to its detrimental effects on human vision and health. To establish traceability in TLM measurements, the National Institute of Metrology, China (NIM), established a TLM reference meter (TLMM) and standard TLM light source (STLS) for calibration and verification services. The TLMM and STLS employ detector- and source-based approaches, respectively, to define the standards for TLM quantities. The TLMM rapidly acquires light waveform data from the TLM light sources and calculates corresponding TLM quantities. Frequency calibration result is with an expanded uncertainty of 1 × 10−5, frequency response function is almost flat in range of 1 kHz–25 kHz, and response time is less than 8 × 10−6 s. The electrical noise was evaluated at approximately 1000:1–5000:1. The STLS generates an arbitrary TLM waveform by converting the virtual waveform into an actual LED output light waveform. For the frequency response function, the relative amplitude decreased by 1% with a frequency of 15 kHz, and response time was less than 5 × 10−6 s. The linearity of the frequency dependency was studied with ratio varied by approximately 0.19% when the periodic triangle excitation in frequency band from 1 Hz to 1 kHz. Experimental comparisons demonstrated that TLM quantities (frequency, percentage flicker, flicker index, short-term flicker severity P st LM , and stroboscopic effect visibility measure ( SVM )) are consistent between the TLMM and STLS devices on 14 typical TLM waveforms. For P st LM , most of the deviations were in the range of −0.019–0.079 (except for one with 0.182). For SVM , most of the deviations were in the range of −0.001–0.003 (except for one with 0.014).

Evaluation and inter-comparison of twenty-three gridded rainfall products representing a typical urban monsoon climate in India

Accurate and reliable estimation of rainfall is crucial for scientific research and various applications. However, the observed rainfall data is often limited. With the advancements in technology, many global gridded rainfall products are now available, but their accuracy levels vary across the world. In this study, we comprehensively analyzed the reliability and effectiveness of 23 publicly available global rainfall datasets against the observed rainfall for Patna, representing a typical urban monsoon climate in India. Thirteen continuous and ten categorical statistical metrics were applied at daily, weekly, monthly, and annual intervals over 16 years (2000–2015). The results indicate that the reliability of all derived rainfall datasets varied on different temporal scales and reference datasets used. Overall, in continuous metrics, MERRA2 and MSWEP consistently outperformed in all the temporal scales whereas in categorical metrics for analyzing the rainfall detection ability, AIMERG, followed by MERRA2 demonstrated superior performance among others. Furthermore, IMD GRID, GSMAP, PCCS, AIMERG, and IMERG performed well in estimating different rainfall intensities. MERRA2 and MSWEP, which have not been widely considered for evaluation in a monsoon climate were found to be outstanding performers consistently. Therefore, we suggest broadening the selection of global rainfall products in the evaluation to fully utilize the potentiality of all available options. Furthermore, our approach offers a reliable framework to comprehensively assess the performance of different gridded rainfall products and assist in the selection of the best rainfall product for a particular region and purpose.

The Life Cycles of Counterfactual Modal Verbs in Ancient Greek: Temporal Reference Shift, Language Ecology, and Analogy

The Life Cycles of Counterfactual Modal Verbs in Ancient Greek: Temporal Reference Shift, Language Ecology, and Analogy

New chronology evidence of prehistoric human activities indicated by pottery luminescence dating in the humid subtropical mountains of South China

The age of prehistoric human sites serves as a fundamental basis for studying the relationship between human activities and landscape changes in the humid subtropical mountains of South China. The presence of pottery in these archaeological sites is widespread and offers a valuable resource for precise dating purposes. The Longtoushan (LTS) site, located in the northern mountains of Fujian Province, contains a rich variety of pottery types from various periods, representing a rare multi-period stratigraphic overlap in this area and playing a crucial role in constructing the cultural sequence and lineage of prehistoric and ancient times in this region. In this study, we employed thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques to establish the age of pottery samples collected from the LTS site situated in the upper Minjiang River region of southeast China for the first time, while also comparing our findings with other dating methods to construct a chronological framework for the site. The results showed that: (1) The samples analyzed in this study can be classified according to the peak strength of 325 °C TL signal at natural and regenerative doses of quartz. Samples with weak TL signal at 325 °C (type II samples) showed high recuperation and equivalent dose underestimation at a low preheat temperature (220 °C) in OSL test. (2) Conventional SAR procedures employed for type I samples are not suitable for type II samples. Type II samples require additional OSL stimulation towards the end of the cycle and an extended stimulation duration. (3) The application of various dating methods has revealed that the LTS site represents a long-term settlement in the humid subtropical mountains of South China, commencing around 4.6–4.4 thousand years ago (ka). Specifically, the dating of pottery pieces from kiln sites and tombs in the late Neolithic period provides a specific temporal reference for further understanding of prehistoric human culture and production behavior in the humid mountains of Fujian.

Touching the Franks Casket: Global History and the Trojan Past on an Early Medieval English Object

Abstract The contribution examines the Franks Casket, a whale-bone casket probably produced in the northern British kingdom of Northumbria in the eighth century that displays a number of carved images referencing events from different cultural and temporal contexts as well as inscriptions in Roman script and runes, Latin and Old English. We focus on the casket’s lid, which shows a siege scene, with an archer prominently displayed towards the middle, the word ægili carved above him. Traditionally understood as a reference to an unknown story about Weland’s brother Egil, the image has also been read as a depiction of the siege of Troy by a minority of scholars. While we offer evidence that the latter reading is at least somewhat better founded than the former, we argue that the lid’s design does not necessarily invite a straightforward identification with a single cultural context but rather works as a hinge that ties together the various cultural and temporal references on the casket. In allowing the viewer to construct various contexts in which the image might be viewed, the Franks Casket suggests their fundamental compatibility, as if the supposedly distinct historical and legendary materials had always overlapped and permeated each other. Taking into account the object’s material and aesthetic form thus makes it possible to break away from all-too-simple narratives of historical succession and helps us understand the complex temporalities that early medieval English art was capable of generating.

Can gestures communicate the time of described events? The perception of temporal gestures executed by a companion robot

In this paper, we investigate whether temporal gestures indicating different events in time can convey information about the relative timing of these events. We depart from the assertion, that in many cultures time is metaphorically represented as an axis, oriented from left to right, i.e. recent or future events have rightmost position, as compared to the events of the past. We test the hypothesis that temporal gestures, referring to the events on the axis, may communicate to the addressee the temporal reference of the described events. The hypothesis was tested in an experiment (N = 22 people, average age 21.6 years, 17 female) where two companion robots told stories, accompanied by left-oriented, symmetric or right oriented gestures. Each story included events from two different cases – recent and past, and each statement was accompanied by (a) left-oriented or symmetric gesture (first condition), or (b) right-oriented or symmetric gesture (second condition). The task of the subjects was to correlate the described events with time, assigning each statement with recent or past event. As a result of this study, the hypothesis that the orientation of temporal gestures can communicate the time of the designated events was partially confirmed. The results correspond to the concept of time oriented for the narrator from left to right, where the events of the past are in the center, and later events (recent events, or ‘today’) are located on the right. This conceptual orientation in the experiment was interpreted by the human listeners, although from their point of view, “recent events” are located on the left side of the metaphoric axis.

A link between static and dynamical perturbation theory

Dynamics, the physical change in time and a pillar of natural sciences, can be regarded as an emergent phenomenon when the system of interest is part of a larger, static one. This ‘relational approach to time’, in which the system’s environment provides a temporal reference, does not only provide insight into foundational issues of physics, but holds the potential for a deeper theoretical understanding as it intimately links statics and dynamics. Reinforcing the significance of this connection, we demonstrate, based on recent progress (Gemsheim and Rost 2023 Phys. Rev. Lett. 131 140202), the role of emergent time as a vital link between time-independent and time-dependent perturbation theory in quantum mechanics. We calculate first order contributions, which are often the most significant, and discuss the issue of degenerate spectra. Based on our results, we envision future applications for the calculation of dynamical phenomena based on a single pure energy eigenstate.

Assessing contact-induced change in Palestinian Arabic: Evidence from Beirut

AbstractWe investigate whether Palestinian Arabic (PA), as spoken by the local Palestinian refugee population in Beirut, is converging with Lebanese Arabic (LA), the majority variety. Using a sociolinguistic framework, we target three variables considered to be susceptible to convergent change. We find evidence of contact-induced change in PA in the variable raising of word-medial /a:/ to [e:], as well as in the attrition of socially marked exponents of verbal negation. By contrast, in the case of the third variable, the future temporal reference system, the evidence for convergence is less compelling on account of key differences between the contact varieties, including the vertiginous rise of the proclitic future marker ħa- in PA. We implicate the respective social salience of the targeted variables in their differential susceptibility to convergence. Our results afford new insights into dialect contact and elucidate under-studied patterns of grammatical variation and change in Levantine Arabic.

Carrier Phase Dual One-Way Ranging Method Based on a Frequency Hopping Signal

With the development of navigation satellite constellation systems, to improve navigation service and orbit determination performance, the accuracy requirements for maintaining temporal references have increased rapidly. Among the current navigation satellites, a dual one-way ranging (DOWR) approach based on intersatellite links (ISLs) is widely adopted in the BeiDou system and global positioning system (GPS) to transmit satellite time reference information. However, the accuracy of DOWR is restricted by the pseudonoise (PN) code rate. To improve the accuracy of DOWR, the PN code measurement must be replaced by the carrier phase measurement. This paper introduces an algorithm that utilizes frequency hopping to achieve carrier phase ranging. In addition to the high-precision advantages of carrier phase measurements, the anti-interference performance of the ranging signal is also improved due to the characteristics of the frequency hopping signal itself. Ultimately, at a carrier-to-noise ratio of 40 dB-Hz, the measurement accuracy is 9.54 μm, while the PN code measurement accuracy in the same environment is 0.13 m. As the carrier-to-noise ratio increases, the measurement accuracy further improves.

It Costs To Exist: Acceptability Judgments of the Temporal Concord of the Auxiliary Verbs You and Hui in Taiwan Mandarin.

The mechanisms underlying the processing of the temporal reference of a sentence are still unexplored. Most of the previous psycholinguistic studies used the temporal concord violation between deictic time adverbs and tense marking on the verb to investigate this issue. They found that processing past tense marking is more difficult than non-past tense, indicated by lower accuracy rates and/or longer reaction time. However, it is not clear whether this complexity is due to tense marking or the temporal reference it denotes. This paper examines this issue with a judgment acceptability experiment in Taiwan Mandarin, which is analyzed as a tenseless language. The two modal auxiliary verbs you and hui were placed after deictic past time adverbs (grammatical with you but not with hui) and deictic future time adverbs (grammatical with hui but not with you). The temporal concord violation of the auxiliary verb you led to higher acceptability rates but longer reaction time than hui, reflecting higher processing difficulties. This paper argues that these complexities are due to the existential-assertive meaning of you, which interplays with the meaning of the event described by the verb rendering the situation more or less likely to occur in the future. The computation of the temporal concord of hui, displaying a future sense meaning, is more straightforward and therefore easier to process. This suggests that the mechanisms responsible for temporal reference processing are of different nature depending on the semantics of the temporal marker in the sentence.

Spatiotemporal Variations of COVID-19 Variants in 100 Countries: Exploring Spatial Patterns and Time-Lag Effects

Learning from the COVID-19 pandemic is vital for future global health crises. Forecasting pandemic spread across countries in the presence of viral mutations, such as SARS-CoV-2 variant strains, remains a challenge. Previous studies indicate spatial and temporal regularities in SARS-CoV-2 variant distribution, yet limitations persist: (1) static geographical patterns overlook dynamic changes and their causes, and (2) the association between temporal variations in SARS-CoV-2 lineages and epidemic outbreaks is underexplored. To address these gaps, we propose an analysis framework using more than 10 million SARS-CoV-2 genome sequence metadata from 100 countries. Our framework identifies spatial heterogeneity patterns in the relative frequency of SARS-CoV-2 variants through clustering, examines factors influencing spatial heterogeneity using explainable machine learning, and analyzes the time lag effect of temporal variation on COVID-19 infection waves based on spatial patterns. Our findings demonstrate the following: (1) The distribution of SARS-CoV-2 variant strains among 100 countries exhibits a spatial pattern characterized by geographic proximity, with observed dynamic changes. (2) Bilateral distance consistently dominates, and factors related to globalization and response policy contribute to nongeographic proximity and temporal variation of the spatial pattern. (3) Leveraging this spatial pattern allows for the forecast of time lags (mainly ranging from twenty to thirty-eight days) between the emergence of new strains and subsequent infection waves. Our study clarifies the spatial pattern and time lag effect of the dynamic distribution of SARS-CoV-2 variant strains. It offers a spatial basis and temporal reference for early warning in future global public health crises from a geographical perspective.

Reconciling what is and was: hybrid and remixed literature in an environmental time

Recent literary developments, in digital culture and in marginal and hybrid forms, offer us new ways to reconcile our relationship with time, history and human agency. Remixed and hybrid forms, as shown, can unify disparate rhythms and frames, different temporal references from different historical periods, in one synthesized rhythmico-temporal environment. In a perceiving subject, the experience highlights a general poiesis of making and presents itself as a form of agency that can be applied to everyday life through an enhanced understanding of time, rhythm and material culture.

Using Case Forms for Expressing Temporal Relations in Modern Turkish Language

Many languages, including modern Turkish, employ lexemes with spatial meaning to express temporal relations. However, the Turkish language stands out for its use of case forms of nouns both to describe the spatial position and movement of objects and to establish the temporal reference of actions and events. These differences are systemic, suggest that native Turkish speakers perceive spatial and temporal phenomena in a unique way, and determine the historical change in their models of time perception. They challenge the belief that spatial relations prevail over temporal ones in the perception of the surrounding world by peoples with nomadic roots but highlight the necessity of considering materials from other Turkic languages. The results obtained show that facts from different linguistic levels should be involved to analyze how temporal relations are conveyed.

Temporal repertoires in contemporary activism: The cases of Fridays for Future, 16 Days of Activism Against Gender-Based Violence and ‘It’s Thursday Again!’

ABSTRACT This paper proposes the novel concept of ‘temporal activist repertoires’ (TAR) defined as the intentional and meaningful selection and use of temporal elements, such as time frame, timing, tempo, duration, and temporality in collective action’s tactics and frames. Collectives thereby draw on culturally resonant temporal references to interweave the symbolic and strategic choices in making their demands, organising political action and/or sustaining commitment to the political cause. To answer the question of how social movements use TAR and how these are positioned alongside other repertoires of contention, the paper analyses: the global Fridays for the Future and 16 Days of Activism Against Gender-Based Violence, and the Austrian ‘It’s Thursday Again!’. The paper shows that the innovative potential of TAR is linked to the use of technologically advanced media tools for the purposes of coordination, pressure, recruitment, mobilisation and visibility, as well as for the adaptations that these movements require, which include strategies to build on past traditions and/or to connect with currently existing allied movements.

Developing a Natural Language Understanding System for Dealing with the Sequencing Problem in Simulating Brain Damage

This paper is an attempt to show how a Human-Robot Interface (HRI) system in the Greek language can help people with brain damage in speech and its related perception issues. This proposal is not the product of research conducted on how to treat brain injuries. It is a conclusion stemming from research on intelligent Human-Robot interfaces, as a part of Artificial Intelligence and Natural Language Processing, which approaches the processing and understanding of natural language with specific methods. For the same reason, experiments on real patients have not been conducted. Thus, this paper does not propose a competing method, but a method for further study. Since it is referring to a very general and quite complex issue, an approach is presented here for the Sequencing problem. A person with such a problem cannot hierarchically organize the tasks needed to be performed. This Hierarchy has to do with both time and practicality. The particular problem here, as much as the innovation of our approach, lies not when there are explicit temporally defined instructions, but in the ability to derive these temporal values through the person’s perception from more vague temporal references. The present approach is developed based on our related previous works for deploying a robotic system that relies on Hole Semantics and the OMAS-III computational model as a grammatical formalism for its communication with humans.

Embedding past, present and future crises: time and the political construction of the Covid-19 pandemic in the EU

ABSTRACT This paper investigates the construction of the COVID-19 pandemic crisis by EU elites. It addresses the puzzling relationship between the spread of the new virus with a large-scale reconfiguration of economic governance in the EU which was unimaginable a few months earlier. Drawing from a constructivist approach to political economy, we argue that the discursive construal and framing of this crisis was instrumental to embed the emergency of the pandemic with broader levels of conjunctural, historical, and even civilizational temporal references. Providing a frame analysis of public statements by the heads of the European Commission, the European Council, and European Central Bank during 2020, we show how the sudden outbreak of COVID-19 was framed as a catalyst for tackling the EU’s historical crisis of purpose, the socio-economic imbalances left over from the euro crisis, as well as the predicament of the climate crisis.

‘It won’t be the witches that are burning this time’: The anarchist temporalities of folk punk

This article is an exploration of the temporal politics of folk punk. Folk punk is a subgenre of punk played with predominantly acoustic instruments that emerged in the 1980s but developed a more concrete form in the late 1990s. This article compares the temporal politics of two scenes within folk punk. First, it looks at an early scene centred on the record label Plan-It-X. Second, ‘traditional folk punk’ is examined. In this latter scene, artists utilize an increasing range of instruments and musical resources associated with various types of traditional music. This musical change is also reflected lyrically; the second scene has much broader temporal references in comparison with the narrowly defined presentism of the Plan-It-X scene. The central argument of this article is that these musical and lyrical differences are politically and theoretically important. The dynamics within the folk punk scene complicate understandings of prefigurative politics, challenging the forms of presentism and individualism that this concept is associated with. The implications of these dynamics are lastly elaborated upon with reference to Gustav Landauer’s mystical anarchism.

An Innovative Sensor Integrated with GNSS and Accelerometer for Bridge Health Monitoring

This paper presents an innovative integrated sensor that combines GNSS and a low-cost accelerometer for bridge health monitoring. GNSS and accelerometers are both significant and effective sensors for structural monitoring, but they each have limitations. The sampling rate of GNSS data is relatively low, making it challenging to capture high-frequency vibrations, while accelerometers struggle with low-frequency signals and are susceptible to environmental changes. Additionally, GNSS receivers and accelerometers are often installed separately, leading to challenges in data fusion processing due to differing temporal and geospatial references. The proposed integrated sensor addresses these issues by synchronizing GNSS and an accelerometer’s time and geospatial coordinate reference. This allows for a more accurate and reliable deformation and vibration measurement for bridge monitoring. The performance of the new sensor was assessed using a high-quality/cost Leica GM30 GNSS receiver and a Sherborne A545 accelerometer. Experiments conducted on the Wilford suspension bridge demonstrate the effectiveness of this innovative integrated sensor in measuring deformation and vibration for bridge health monitoring. The limitation of the low-cost MEMS (Micro Electromechanical System) accelerometer for the weak motion frequency detection is also pointed out.

The role of temporal analogies in collective movements

AbstractAlthough the importance of temporal perspectives for understanding collective movements has been theoretically emphasised, they are rarely considered in research. Focusing on the mass protests against COVID‐19 policies in Germany, we investigated how protesters make use of temporal references in their protest narratives. Results from 11 multi‐site protest observations and 31 interviews showed that participants (a) drew historical perpetrator and victim analogies and imagined a dystopian future, bolstering perceptions of injustice, (b) drew on resistance narratives and imagined the ideal, utopian future society, increasing their perceived efficacy and (c) countered feelings of insignificance by identifying with past heroes. Protesters living in the East of Germany drew comparatively more resistance analogies than those living in the West, who often likened those complying with the COVID‐19 policies to the perpetrators of the past national‐socialist and communist dictatorships. The findings empirically underline the importance of integrating historical–cultural–future perspectives into models of collective action.