Current Division Research Articles

Enabling High‐Rate and Long‐Cycling Zinc–Air Batteries with a ΔE = 0.56 V Bifunctional Oxygen Electrocatalyst

AbstractZn–air batteries (ZABs) are promising next‐generation energy storage devices due to their low cost, intrinsic safety, and environmental benignity. However, the sluggish kinetics of the cathodic reactions severely limits the ZAB performances in practical use, calling for high‐efficiency bifunctional oxygen reduction and evolution electrocatalysts. Herein, an ultrahigh‐active bifunctional electrocatalyst is developed with a record‐low ΔE of 0.56 V, significantly outperforming the noble‐metal‐based benchmark (Pt/C+Ir/C, ΔE = 0.77 V) and many other reported bifunctional electrocatalysts (mostly ΔE ≥ 0.60 V). The nanoscale composite of Fe‐based single‐atom sites and nanosized layered double hydroxides endows the bifunctional electrocatalyst with high conductivity and a large active surface that afford strengthened electron conduction and ion transport pathways. Furthermore, a remarkable improvement in stability is realized following the current division principle. ZABs with the bifunctional electrocatalyst deliver a high peak power density of 198 mW cm−2 and excellent cycling durability for over 6000 cycles. Moreover, ampere‐hour‐scale ZABs are constructed and cycled under 1.0 A and 1.0 Ah conditions. This work breaks the activity record for bifunctional oxygen electrocatalysis and expands the potential of ZABs for sustainable energy storage.

Harmonic voltage compensation and harmonic current sharing strategy of grid-forming inverter

In a multi-inverter parallel system, the harmonic governance control strategy may worsen the system's current circulation problem due to the line impedance difference, which could further affect the stable operation of the system. To solve the problem, the strategy considering both power sharing and harmonic control is proposed in this paper. First, the microgrid system with background harmonics is modeled and analyzed. Based on the modeled system, a comprehensive control strategy for the grid inverter with harmonic voltage compensation and harmonic current sharing is established. In this paper, the output signal is controlled by frequency division. This paper adopts grid-forming control in the fundamental wave domain and employs harmonic voltage compensation control in the harmonic domain. The harmonic voltage is synthesized by collecting the specific harmonic current through the band-pass filter, compensating for the harmonic voltage drop on the line to improve the harmonic voltage quality of the point of common coupling(PCC). Aiming at the sharing problem caused by line impedance difference, virtual impedance control is introduced, harmonic impedance is redesigned according to the adjusted output impedance, and the harmonic output impedance before and after adjustment is measured and compared. The simulation results show that the proposed control strategy can not only reduce the harmonic content of the PCC voltage but also achieve the effect of equal harmonic current division.

The Central Functions of Cities in Poland in Light of Administrative Reform

The aim of this article is to determine and assess the changes in the central functions of major Polish cities in the context of Poland’s 1999 administrative reform. This study covers a period of twenty-two years (1998–2019), which provides a solid perspective for evaluating the functional changes occurring within the current territorial division of the country. The conclusions indicate that the dynamics of changes in central functions in former provincial capitals differed from those in cities that retained this status. At the same time, it was found that the administrative reform sanctioned the scope and scale of earlier socio-economic dependencies in the present regional centers. The research results suggest that administrative reforms in Poland solidified existing socio-economic development paths in cities, but were not the sole catalyst for change. They point to a complex interaction of factors influencing urban evolution. By utilizing indicators that measure the centrality of cities in relation to their demographic potential, this research offers a quantitative assessment of the level of development of central functions, which is crucial for monitoring progress towards sustainable urbanization. By providing this information, this research also contributes to a broader discussion on the advancement and dynamics of sustainable urban development.

Perfect Monomial Prediction for Modular Addition

Modular addition is often the most complex component of typical Addition- Rotation-XOR (ARX) ciphers, and the division property is the most effective tool for detecting integral distinguishers. Thus, having a precise division property model for modular addition is crucial in the search for integral distinguishers in ARX ciphers. Current division property models for modular addition either (a) express the operation as a Boolean circuit and apply standard propagation rules for basic operations (COPY, XOR, AND), or (b) treat it as a sequence of smaller functions with carry bits, modeling each function individually. Both approaches were originally proposed for the twosubset bit-based division property (2BDP), which is theoretically imprecise and may overlook some balanced bits.Recently, more precise versions of the division property, such as parity sets, threesubset bit-based division property without unknown subsets (3BDPwoU) or monomial prediction (MP), and algebraic transition matrices have been proposed. However, little attention has been given to modular addition within these precise models.The propagation rule for the precise division property of a vectorial Boolean function f requires that u can propagate to v if and only if the monomial πu(x) appears in πv(f). Braeken and Semaev (FSE 2005) studied the algebraic structure of modular addition and showed that for x ⊞ y = z, the monomial πu(x)πv(y) appears in πw(z) if and only if u + v = w. Their theorem directly leads to a precise division property model for modular addition. Surprisingly, this model has not been applied in division property searches, to the best of our knowledge.In this paper, we apply Braeken and Semaev’s theorem to search for integral distinguishers in ARX ciphers, leading to several new results. First, we improve the state-of-the-art integral distinguishers for all variants of the Speck family, significantly enhancing search efficiency for Speck-32/48/64/96 and detecting new integral distinguishers for Speck-48/64/96/128. Second, we determine the exact degrees of output bits for 7-round Speck-32 and all/16/2 output bits for 2/3/4-round Alzette for the first time. Third, we revisit the choice of rotation parameters in Speck instances, providing a criterion that enhances resistance against integral distinguishers. Additionally, we offer a simpler proof for Braeken and Semaev’s theorem using monomial prediction, demonstrating the potential of division property methods in the study of Boolean functions.We hope that the proposed methods will be valuable in the future design of ARX ciphers.

Factor Modelling of Russian Parents’ Opinions on the Impact of the Parental Leave System on the Birth Rate

In the context of the negative demographic trend in Russia, new mechanisms for stimulating birth rates are of particular relevance. One such instrument is parental leave policy. The aim of our study is to model the impact of potential transformations in parental leave on the reproductive intentions of Russian parents using factor analysis. In 2022, we conducted a survey of Russian parents with children under the age of 18 months. The sample consisted of 1,000 individuals, and the survey covered nearly all regions of Russia. We identified two main components: 1. Opinions on the flexibility of the parental leave system as a factor for improving birth rates; 2. Opinions on the amount of parental leave benefits as a factor for improving birth rates. We found significant correlations between the values of these components and several socio-demographic characteristics of the respondents, including gender, age, satisfaction with the current division of parental responsibilities within the family, the desire to legally mandate fathers to take a portion of parental leave in Russia, and the prospective evaluation of the financial status change if mandatory paternal leave were to be introduced. Our results contribute to the ongoing debate on the necessity and feasibility of improving the existing parental leave system in Russia and its potential impact on birth rates.

Polityczne konsekwencje niedostosowania liczby mandatów w okręgach wyborczych do zmian demograficznych w wyborach do Sejmu RP w 2023 r.

The subject of analysis in this article is the allocation of mandates among electoral districts in the elections to the Sejm of the Republic of Poland 2023 and its political consequences. According to the principle of electoral equality in material aspect, the number of voters per mandate in individual electoral districts should be the same or as close as possible. The National Electoral Commission has pointed out that the current division into electoral districts specified in the annexes to the Electoral Code violates this principle. Shifting mandates between electoral districts would alter the balance of political power in the parliament.

Status prawny województwa

In the discussion on the new territorial division of Poland, some experts present views on the need to change the current division into voivodeships. Reforms in this direction are based mainly on arguments resulting from studies and analyses of the country’s spatial development. If such reforms were to take place, they must take into account the multifaceted political and legal status of the voivodeship, its importance as a European region and the highest local government unit in the state, as well as the government administration in the voivodeship.

Machine Learning Algorithms for Performance Enhancement in DCO-OFDM-Based LiFi Systems

This study describes how machine learning methods can be used to enhance the performance of LiFi (light fidelity) systems that are based on DCO-OFDM (direct current bias optical orthogonal frequency division multiplexing). LiFi, a rapidly developing technology that uses light for wireless communication, has to contend with issues like channel impairments and signal interference. This work investigates several machine learning strategies to address these problems and improve the DCO-OFDM LiFi systems' overall performance. It is determined how well various machine learning techniques perform in terms of improving system parameters, decreasing latency, and raising throughput by analyzing real-world data and simulation studies. Various sorts of symmetrical recurrence division multiplexing (OFDM, for example, DC one-sided optical OFDM (DCO-OFDM), are utilized in light devotion (LiFi). A critical DC predisposition in DCO-OFDM brings about optical power failure, while a minor inclination increment cutting commotion. In this manner, it's essential to decide the appropriate DC predisposition level for DCO-OFDM. This examination finds the ideal DC-predisposition an incentive for DCO-OFDM based LiFi frameworks utilizing machine learning (ML) algorithms. To do this, a MATLAB device is utilized to create a dataset for DCO-OFDM. Thusly, Python writing computer programs is utilized to apply machine learning methods. ML is used to recognize the basic DCO-OFDM qualities that influence the ideal DC predisposition. Here, it is exhibited that the base, greatest, and standard deviation of the bipolar OFDM signal, as well as the size of the heavenly body, decide the ideal DC inclination.

On the Frontline of Athlete Mental Health: The Mental Health Literacy of NCAA Coaches

Coaches’ knowledge, attitudes, and beliefs about mental health—or mental health literacy (MHL)—affect teams’ mental health climates and the detection, referral, and treatment of athletes’ mental health concerns. Thus, assessing collegiate coaches’ MHL, and factors related to its presence, is critical. Using the Mental Health Literacy Scale, 1,571 NCAA (National Collegiate Athletic Association) coaches were surveyed regarding their MHL and demographic and mental health experience factors. Overall, 99.9% of the coaches surveyed believe that athletes’ mental health affected their sport performances. Through hierarchical regression analyses, coaches’ exposure to mental health treatment, perceived helpfulness of mental health treatment, gender (i.e., woman), years coaching (i.e., fewer years), and current NCAA division (i.e., Division III) were significantly related to their MHL, explaining 15.5% of variance. However, coaches’ race/ethnicity did not reach significance. Recommendations regarding increasing coaches’ MHL and hiring appropriately trained and licensed mental health and sport psychology professionals are offered.

Research on Lifecycle-based Financial Strategy on New Energy Enterprises: Take CATL as an Example

The emergence of energy security issues reflects the current global turmoil and division. The two energy crises and regional conflicts have put the global energy system in a severe winter. Energy security is not only the latest requirement for the high-quality development of countries under the "carbon neutrality" background but also an aspect of overall global progress. This study selects the leading enterprise in the new energy industry, Contemporary Amperex Technology Co., Limited (CATL), as the research object. Based on the life cycle theory and financial strategy theory, the paper analyzes the company's financing, investment, and profit distribution strategies and constructs a financial strategy matrix to study the problems existing in the company's current financial strategy. The research results show that there are issues such as unreasonable financing structure, insignificant investment benefits, and significant fluctuations in dividend distribution policies. Finally, targeted optimization suggestions are proposed, hoping to provide a reference value for peers.

Towards a ‘security-centred’ energy transition: balancing the European Union’s ambitions and geopolitical realities

Abstract The European Union (EU) faces a pressing, multi-level energy crisis propelled by the perfect storm of Russia’s war in Ukraine and rapidly progressing climate change. As a result, the EU is scrambling to ensure it has sufficient energy supplies for the foreseeable future while reinventing its energy strategy in the long term. Since the EU is at a critical juncture for squaring EU energy security with European and international legal commitments, this article surveys this radical shift and its consequences. It analyses new EU-wide crisis-response tools and ad hoc bilateral arrangements with third countries against existing legal commitments. Recent developments are only the beginning of a much larger re-evaluation of core notions of the ‘trade-energy security’ nexus. To decarbonize, the EU must move towards a ‘security-centred’ energy transition, premised on ‘security first, compliance second’. This requires reassessing the notion of ‘protectionism’ in geopolitically sensitive areas and the current division of energy competences between the EU and its Member States.

New fossil stoneflies (Plecoptera: Arctoperlaria) from Australia testify ancient dispersal across Pangea

The stonefly suborders Arctoperlaria and Antarctoperlaria reflect the current division of the diversity of this insect order between the Northern and Southern Hemispheres. However, there are several exceptions to this pattern, the most notable being the family Notonemouridae, which is phylogenetically deeply subordinate within the northern Arctoperlaria, but distributed in South Africa, South America, and Australia. Various hypotheses have been proposed regarding the circumstances of their dispersal to the south. Some estimated their origin as relatively recent, with long-distance dispersal to the southern continents in the Late Cretaceous or early Paleogene. On the other hand, fossils of Notonemouridae have been dated to the Middle Jurassic, proving the lineage is very ancient. However, all known notonemourid fossils originate from Asia and the timing of their dispersal to the south cannot be precisely estimated. Here we report new fossil stoneflies from the Late Jurassic Talbragar Fish Beds, Australia, described as Talbragaria australisgen. et sp. nov. and attributed to Notonemouridae. This finding represents the first fossil evidence of the northern suborder Arctoperlaria in the Southern Hemisphere, and confirms the north-to-south dispersal of Notonemouridae across Pangea prior to the continental break-up.

Design and Characterization of Dispersion-Tailored Silicon Strip Waveguides toward Wideband Wavelength Conversion

One of cost-effective ways to increase the transmission capacity of current standard wavelength division multiplexing (WDM) transmission systems is to use a wavelength band other than the C-band to transmit in multi-band. We proposed the concept of multi-band system using wavelength conversion, which can simultaneously process signals over a wide wavelength range. All-optical wavelength conversion could be used to convert C-band WDM signals into other bands in a highly nonlinear fiber (HNLF) by four-wave mixing and allow to simultaneously transmit multiple WDM signals including other than the C-band, with only C-band transceivers. Wavelength conversion has been reported for various nonlinear waveguide materials other than HNLF. In such nonlinear materials, we noticed the possibility of wideband transmission by dispersion-tailored silicon-on-insulator (SOI) waveguides. Based on the CMOS process has high accuracy, it is expected that the chromatic dispersion fluctuation could be reduced in mass production. As a first step in the investigation of the broadness of wavelength conversion using SOI-based waveguides, we designed and fabricated dispersion-tailored 12 strip waveguides provided with an edge coupler at both ends. Each of the 12 waveguides having different widths and lengths and is connected to fibers via lensed fibers or by lenses. In order to characterize each waveguide, the pump-probe experimental setup was constructed using a tunable light source as pump and an unmodulated 96-ch C-band WDM test signal. Using this setup, we evaluate insertion loss, input power dependence, conversion bandwidth and conversion efficiency. We confirmed C-band test signal was converted to the S-band and the L-band using the same silicon waveguide with 3 dB conversion bandwidth over 100-nm. Furthermore, an increased design tolerance of at least 90 nm was confirmed for C-to-S conversion by shortening the waveguide length. It is confirmed that the wavelength converters using the nonlinear waveguide has sufficiently wide conversion bandwidth to enhance the multi-band WDM transmission system.

Beetles and lichens: tracing the origins and evolution of lichenophagy within the darkling beetle tribe Helopini (Coleoptera: Tenebrionidae)

Abstract Although the complex evolutionary history of lichen-forming fungi has gained considerable attention, particularly regarding the long-debated role of these organisms in shaping early terrestrial ecosystems, the evolution of lichenivory and its potential impact on the diversification of lichenophages have been largely neglected. With > 800 described species worldwide and a broad geographical distribution, the tribe Helopini (Coleoptera: Tenebrionidae) represents a diverse, yet poorly studied, group of predominantly lichenophagous beetles. Using a dataset of 52 ingroup taxa and five gene fragments, a first phylogenetic hypothesis of the tribe was generated, which was subsequently used for reconstructing the ancestral state of the trophic and habitat associations of the beetles and for estimating a time frame of diversification. Our phylogenetic reconstruction sheds light on the higher-level systematics of the tribe, supporting the current subtribal division of the group while also providing a framework for understanding the intergeneric relationships within subtribes. The results also indicate an Early Cretaceous origin of the tribe, highlighting the close association between Helopini and lichen-forming fungi since the emergence of the group. Nevertheless, at least seven independent switches from lichenophagy to alternative feeding habits have occurred since the middle Eocene, which can be linked temporally to transitions from forests to open habitats.

A contribution to the critique of Irish sociology

Irish society is situated within a period of epoch-defining social change. We are facing in to a short number of decades, which promise the significant re-shaping of the political and social contours of our nation. Irish sociology's disciplinary mandate is to analyse that change, yet a historical debate has found new expression – heightened by the 30th anniversary of the Irish Journal of Sociology (IJS) and the 50th anniversary of the formation of the Sociological Association of Ireland (SAI) – as to whether the discipline is utilising the appropriate means to achieve its ends. The current sociological division of labour is unevenly balanced, with empirical inquiry and sub-disciplinary focus privileged over systemic and synthesised social theorising. In the absence of such theorising, sociology runs the risk of remaining an empirical adjunct to other disciplines, as opposed to its rightful position at the centre of the constellation of social sciences. This paper acts as a contribution to the critique of Irish sociology, considering the extent of the disciplines absent centre, providing an analysis as to how we have reached our particular disciplinary juncture and offering certain proposals regarding appropriate analytical anchors for future theoretical focus.

Bidirectional single-multicore-fiber spatial channel network based on a spatial cross-connect and multicore EDFA that efficiently accommodates asymmetric data traffic

In current wavelength division multiplexed (WDM) networks, capacity is deployed in a symmetrical manner, in which wavelength channels provide the same capacity in both directions. However, real data traffic in metro and backbone networks is observed to be considerably asymmetric resulting in wasted capacity in an under-loaded direction. This data traffic asymmetry is expected to increase further in the forthcoming Beyond 5G era due to newly emerging bandwidth-hungry services based on cloud computing. In such a situation, the wasted link capacity in the under-loaded direction can no longer be overlooked. In this paper, we propose a single-multicore-fiber (MCF) bidirectional spatial channel network (SCN) architecture that efficiently accommodates up and down asymmetric traffic. We present a proof-of-concept demonstration of the asymmetric bandwidth allocation in a single-MCF SCN by constructing a single-MCF bidirectional ring network testbed that comprises two spatial cross-connects based on 19-core fiber core selective switches with an M×N wavelength-selective switch and a bidirectional 7-core erbium-doped fiber amplifier with reversible optical isolators. Experimental results for bit error rate measurements of WDM optical signals traveling through different cores in different directions show there is almost no optical signal-to-noise ratio penalty for transmission through the single-MCF bidirectional ring network testbed.

Effect of soil spatial aggregation caused by the calculation unit division on runoff and sediment load simulation in the SWAT model

Distributed hydrological model divides watersheds into distinct calculation units to simulate hydrological processes. Within the model, different calculation unit division schemes induce input elements, such as soil and land use, to certain degrees of generalization, thus affecting the simulation result. Analyzing the effect of the calculation unit division on the simulation result is an important methodology to reduce uncertainty and improve the simulation accuracy of the model. Previous researchers have focused on the comprehensive effect of underlying surface generalization (such as soil, land use, and terrain generalization) caused by the calculation unit division on the simulation results, while it did not separate the effect of the generalization of the individual input factor on the simulation result. In this paper, the Dongjiang headwater region in southern China was selected as the study area. The single type of land use and slope were input into the Soil and Water Assessment Tool (SWAT) model to fix the effects of land use and terrain caused by calculation unit division on the simulation results. Eleven calculation unit division schemes were used to analyze the impact of soil spatial aggregation on runoff and sediment load simulations. The calculation unit division schemes included 11 sub-watershed division schemes and their hydrological response unit (HRU) thresholds were set at 8 %. The drainage area thresholds of the 11 sub-watershed division schemes were 30 ha, 60 ha, 120 ha, 240 ha, 480 ha, 1000 ha, 1600 ha, 2200 ha, 2800 ha, 3400 ha and 4000 ha. The results demonstrated that the soil spatial distribution showed an obvious aggregation with an increase in the drainage area threshold in the SWAT model. Of these, the Krasnozem soil type which covers the largest area in the watershed, increased significantly with an increase in the drainage area threshold. However, the areas of all the other soil types decreased significantly. The Lioth soil type covers the smallest area in the watershed decreased and even disappeared when the threshold in the SWAT model was greater than 1000 ha. Furthermore, soil spatial aggregation caused a significant increase in the annual runoff and sediment load (P < 0.05), with the sediment load (Re = 29.78 %) increasing at a greater rate compared to runoff (Re = 1.74 %). Increased soil aggregation significantly increased the sediment loads in the maximum 1-day, the continuous maximum 5-day, the continuous maximum 7-day, and the sediment load in flood processes (P < 0.001). Refining the calculation unit division scheme will cause a significant increase in the number of calculation units. Due to the computer processing power limitations, we cannot further refine the calculation unit division scheme. Based on our current operational calculation unit division scheme, we did not identify the optimal division scheme in the study region. These results can provide reference information for future research into hydrological model uncertainty and can improve the SWAT model simulation accuracy.

Patterns of phylogenetic diversification in the Dollarbird (Eurystomus orientalis) and Azure Roller (Eurystomus azureus) complex

Genetic isolation and morphological differentiation are two important factors in the speciation process that not always act in concert. A rapid morphological change in a lineage can hide its close relationship to another lineage, while slight morphological differentiation between two taxa can give the appearance of a closer relationship than is actually the case. The Dollarbird (Eurystomus orientalis) and the Azure Roller (Eurystomus azureus) is such an example. Today the Dollarbird and the Azure Roller are unanimously considered to constitute two distinct species, but in a recent genetic study it has been shown that the latter taxon, despite being larger and having a distinctly different coloration, is phylogenetically nested within the former. Its precise placement within this complex has not been determined, however.In this study, we investigate the phylogenetic relationships within the Dollarbird/Azure Roller complex. We estimate divergence times and infer phylogenetic relationships using sequence data from 6,475 genome-wide intronic regions, as well as complete mitochondrial genomes, using both concatenation and multispecies coalescence approaches.We find that within the Dollarbird/Azure Roller complex there are several examples of discrepancies between genetic and morphological differentiation. The Dollarbird is currently divided into between nine to twelve subspecies. Some of these subspecies are poorly differentiated, whereas others are morphologically more clearly discernable. Our data suggest that the complex consist of at least seven distinct genetic lineages that do not entirely match the morphological variation within the group.For instance, our results show that the subspecies solomonensis from the Solomon Islands, despite being morphologically very similar to its geographically closest neighbors, in fact is a highly distinct lineage that became isolated more than 700,000 years ago. In contrast, the morphologically distinct Azure Roller, which is currently treated as a distinct species, is nested within the Dollarbird and forms a slightly younger lineage than solomonensis and is the sister group to a clade with Australian and New Guinean Dollarbirds. Our results also show a deep genetic split within the Dollarbirds on the Asian mainland. This stands in contrast to the apparent clinal morphological variation reported for the birds on the Asian mainland.We also find support for the presence of a genetically distinct clade in the Wallacea region. The birds from the Wallacea region has previously been recognized as a distinct subspecies, connectens, but is currently placed in synonymy of other subspecies.Our results are thus at odds with the current division of the Dollarbird/Azure Roller complex into two species. Given that the species status of azureus is undisputed, the apparent genetic isolation of solomonensis and its clear separation from the other lineages suggests that this taxon also warrants species status. Based on the genetic and morphological variation observed within the Dollarbird/Azure Roller complex there is little doubt that even more taxa should regarded as species, but this require further examination.

Perspectives on and the road towards 100 Gb/s TDM PON with intensity-modulation and direct-detection

We assess the status of current generation 25G and 50G time division multiplexed passive optical network (TDM PON) technologies based on leveraging the cost efficiencies of the Ethernet intra-datacenter ecosystem. As a first step towards 100G TDM PON, we predict the real-world impact of a flexible modulation enhancement to 50G PON, whereby four-level pulse amplitude modulation (PAM4) symbols can be transmitted at the same symbol rate as 50 Gb/s PAM2, but only where excess margins permit. We find that sufficient margins are likely to exist to allow for a majority of future 50G PON optical network units to operate at 100 Gb/s PAM4. Next, we look at the options for a 100G PON capable of supporting the full loss budget and reach requirements. There is no technical risk if coherent technology is adopted, but intensity-modulation and direct-detection (IM-DD) will provide lower complexity, lower cost, and lower power dissipation. We evaluate this option and conclude that by following IM-DD Ethernet optics to 100 GBd, single wavelength IM-DD will continue to be feasible for 100G PON and will be a strong contender for the next generation of PON after 50 Gb/s.

An Ultra-Low-Power Analog Multiplier-Divider Compatible with Digital Code for RRAM-Based Computing-in-Memory Macros.

This manuscript presents an ultra-low-power analog multiplier-divider compatible with digital code words, which is applicable to the integrated structure of resistive random-access memory (RRAM)-based computing-in-memory (CIM) macros. Current multiplication and division are accomplished by a current-mirror-based structure. Compared with digital dividers to achieve higher precision and operation speed, analog dividers present the advantages of a reduced power consumption and a simple circuit structure in lower precision operations, thus improving the energy efficiency. Designed and fabricated in a 55 nm CMOS process, the proposed work is capable of achieving 8-bit precision for analog current multiplication and division operations. Measurement results show that the signal delay is 1 μs when performing 8-bit operation, with a bandwidth of 1.4 MHz. The power consumption is less than 6.15 μW with a 1.2 V supply voltage. The proposed multiplier-divider can increase the operation capacity by dividing the input current and digital code while reducing the power consumption and complexity required by division, which can be further utilized in real-time operation of edge computing devices.