Full-scale Survey Research Articles

Irkutsk regionalism as a trend of Soviet modernism

The article investigates the monuments of Irkutsk Soviet modernism and early postmodernism in order to reveal their identity and peculiarities, to determine the significance of these structures for the specific urban environment of the Eastern Siberian capital, as well as for the history of modern architecture as a research discipline. The research involved a review of bibliographic sources, a full-scale survey of objects belonging to the mentioned periods, and in-person interviews with the architects of the buildings under study and other Irkutsk citizens. Along with attracting interest to the urgent problems of cultural significance, objective assessment, and modern appearance of the heritage of the second half of the 20th century, the authors clarified the chronological framework of the main stages in the development of the modern city and provided a scientific definition of the Irkutsk regionalism term. As a result, it was established that the response to the challenges of the late Soviet years became a recognizable architectural segment, which, although rapturing the fabric of historical urban environment, reassembles it for functional aspiration for the future. The Irkutsk architecture, having an industrial beginning, has nevertheless remained authorial, and even uncompromising in the doctrines of Vladimir A. Pavlov and his followers, who supported his initiatives in the following era of postmodernism.

Technology of regular urban passenger transportation operation improvement

Introduction. The degree of passenger vehicle capacity utilisation affects the economic component of regular urban passenger transport operation, as it depends on the number of passengers transported, which affects the revenue from transportation, as well as on the passenger vehicle capacity, which affects the cost of transportation. One of the tasks formulated in the programme-target documents of the Republic of Belarus is to achieve full selfsufficiency of urban regular passenger transport. One of the ways to ensure this can be maximising the degree of capacity utilisation set by the manufacturer of the passenger vehicle.The aim of the paper is to estimate the degree of passenger vehicle capacity utilisation and dynamics of its change, as well as to develop measures to improve the efficiency of urban regular passenger transport.Materials and methods. When writing the article, the data obtained by a full-scale survey of passenger flows in one of the cities of the Republic of Belarus, conducted in 2019 and in 2024, were used. When writing the article, statistical methods (descriptive statistics, fitting, visualisation, assessment of significance of differences using statistical criteria), analysis of scientific literature and work technology, synthesis of proposals were used.Conclusions. The low degree of utilisation of passenger vehicle capacity is shown. The new technology of the organisation of work of the city passenger transport of regular communication, allowing to increase use of capacity of passenger vehicles and, at the expense of this efficiency of such work is offered.The possibility of further use of the results of scientific work. The received results substantiate necessity of development of scientific toolkit for optimisation of assignment of passenger vehicles to flights taking into account passenger load on them and other restrictions.Practical significance. This article shows the need to develop measures to improve the efficiency of passenger vehicle capacity utilisation for the purposes of increasing the efficiency of urban regular passenger transport.Originality. This paper shows the change in the degree of use of passenger vehicle capacity, shows the factors affecting it, and proposes a new technology for organising the work of urban regular passenger transport. The article will be useful for officials of the management bodies responsible for the organisation of the work of urban passenger transport of regular communication, as well as employees of the enterprises of urban passenger transport, transport scientists.

Half-precast “crossbar-slab-column” frame joint

Introduction. Half-precast frames embodied the positive properties of both precast and cast-in-situ structures. These structural systems are difficult to introduce due to their low level of knowledge, lack of experimental data, and an almost complete absence of a regulatory and technical framework for a design. This stimulates a need to improve and develop new joints with high operational reliability and manufacturability.Aim. To identify the causes of the frame joint destruction.Materials and methods. The frame joint is provided by the hidden cast-in-situ column cantilever in the grooves of crossbars and half-precast floor slab with the installation of additional longitudinal and transverse reinforcement. Precast and cast-in-situ elements interact mainly by reinforcement starter bars. The destruction of frame joints was considered using the example of a half-precast frame with the main spans of 9 and 12 m in a two-storey building according to the results of a full-scale survey during the construction period.Results. At the joints of most crossbars with columns, inclined cracks were detected in the support zones along the lateral surfaces with an opening width of 0.1–5 mm. In addition, cracks were observed along the contact area of the support crossbar groove with the column grouting concrete. An opening revealed them spreading into the body of the groove grouting concrete along the column edge. No adhesion between the walls of a crossbar groove with the joint grouting concrete is observed. The crack formation pattern indicates the determined contour of the floor slab punching above the column.Conclusion. The cause for the destruction of half-precast frame joints involves the insufficient bearing capacity of the section for the action of transverse forces due to the ductility of precast and cast-in-situ elements.

ОБОСНОВАНИЕ МЕТОДИКИ ПРОВЕДЕНИЯ ИССЛЕДОВАНИЯ ИНТЕНСИВНОСТИ ТРАНСПОРТНЫХ ПОТОКОВ

This paper presents a methodology for measuring the intensity of traffic flows, which provides the necessary initial data for the construction of a high-quality transport model. For further calculations, a full-scale survey of the accounting points necessary for the analysis was carried out. The video material obtained as a result of the surveys was processed in accordance with the current regulatory documentation for all types of vehicles and presented in the form of intensity pass-ports for each accounting point.

ВЫСОТНЫЙ РЕГЛАМЕНТ ДЛЯ ИСТОРИЧЕСКОГО ЦЕНТРА ГОРОДА ПЕНЗЫ

The historical center of the city is the main keeper of the cultural code of the city, since the most important historical and cultural objects are concentrated within its borders, the historical environment is preserved. The appearance of high-rise buildings has become a familiar result of the process of urban reconstruction of historical city centers. As a result, there is a compositional destruction of the historical environment, distortion and spatial destruction of the established historical ensembles. The city of Penza is no exception: dozens of historical buildings have been lost, and their place has been taken by buildings of a larger scale and height that destroy the historical environment. The problem of regulating the height of new buildings in the historical environment of the city of Penza has acquired the most acute character and requires its solution. The purpose of the study is to develop a height regulation for the historical center of Penza as an approbation of the previously proposed "comprehensive methodology for identifying the boundaries of the height of a new development in the historical center of a large city based on landscape-visual analysis." The research is based on the study of the problems of regulating the height of buildings in historical city centers in Russia and abroad, the analysis of scientific works and the legislative framework of the Russian Federation and the city of Penza in the field of height regulation, the systematization of domestic and foreign experience in the formation and regulation of height restrictions in historical city centers, a full-scale survey of the city, retrospective and landscape-visual analysis, graphical modeling. As a result of the conducted research, positive results were obtained: the proposed methodology, as a result of testing, confirmed its effectiveness, made it possible to identify landscape and visual features of the historical center of Penza and to form height restrictions within the boundaries of the historical center of the city, the structure and content of the high-rise regulations for the development of the historical center of the city were formed, options for integrating the high-rise regulations into the urban planning documentation of the municipal level were considered.

Ensuring the quality of atmospheric air on main streets and in residential buildings by means of planning and landscaping

Introduction. The level of concentration of toxic substances in the atmospheric air of main streets is largely determined by their aeration regime, established due to exposure to air flow of buildings and green spaces. Therefore, when developing master plans of cities and projects of detailed planning of residential formations to ensure hygienic standards for the expected content of emissions of motor transport in the air of transport communications and adjacent residential buildings, the influence of urban factors on wind speed and direction one should take into account.
 The aim of the study is the justification and selection of urban planning measures to reduce atmospheric air pollution from main roads and streets by exhaust gases of motor transport.
 Material and methods. Full-scale surveys of transport infrastructure facilities in large cities and modelling of the processes of dispersion of exhaust gases of cars in the air using models of residential buildings and green spaces.
 Results. The regularities of the formation of the aeration regime of city streets and the dispersion of car emissions behind the landscaping strips and in residential buildings have been established. Optimal variants of planning, development and landscaping of main streets have been determined, ensuring the reduction of gas contamination of pedestrian zones, public spaces and residential areas.
 Limitations. The choice of landscaping objects for urban roads and streets for field observations and modelling of car emissions dispersion processes is limited to strips of green spaces of a blown and dense construction, without taking into account the peculiarities of the transformation of the air flow and reducing gas pollution under the influence of landscaping strips of an openwork design.
 Conclusions. Reduction of gas pollution of main roads and streets is ensured by choosing the direction of the route and planning, and building techniques. At the same time, it is necessary to use environmental protection linear-strip landscaping facilities of optimal design. At the same time, it should be borne in mind that frontal multi-sectional buildings and strips of green spaces of windproof dense construction stimulate the appearance of stable vortices with a closed circulation of impurities in street canyons and on sections of highways. When choosing urban planning solutions to ensure the quality of atmospheric air of transport communications and adjacent residential buildings in various landscape and climatic conditions, it is necessary to take into account the specifics of the tasks arising in this case to regulate the aeration regime and reclamation of the microclimate as a whole.

A two-phase confirmatory factor analysis and structural equation modelling for customer-based brand equity framework in the smartphone industry

The emergence of smartphones has brought a transformative change in the smartphone industry in terms of technological innovations and business decision-making dynamics. Smartphones have appeared in the market as the standard configuration and currently represent the fastest-growing market segment in the telecommunications industry. It is considered a highly involved product that is relevant and important to the buyer due to its daily use and multiple functionalities. With this growth in smartphone use, the market has been more competitive with the emergence of new brands leading to a wide range of brand selection opportunities for customers. Therefore, there is a need for smartphone companies to understand customers’ brand equity before implementing strategic decision-making to promote their brands. This paper introduces a conceptual framework based on the theoretical framework of Keller and Aakar’s Customer-Based Brand Equity (CBBE) models. This conceptual framework consists of nine constructs organised into three layers: marketing programs, brand equity dimensions, and brand equity. The framework has been validated using a quantitative survey of Nepalese smartphone users in two phases. In the first phase, Exploratory Factor Analysis (EFA) has been performed to measure the reliability of the constructs and the Factor Loading (FL) of the scales under each construct of the proposed framework. In the second phase, the survey questionnaire has been revised based on the analytical results of the first phase, and the full-phase survey has been conducted. The full-scale survey data has been analysed using Confirmatory Factor Analysis (CFA). Hence, the relationship between the constructs has been measured using Structural Equation Modelling (SEM) for the proposed framework. This proposed framework has focused on different strategic decision-making constraints of smartphone marketing, which decision-makers can utilise to develop market policies and other business decisions. The results have indicated that the Product Features (PF) have an important role in creating positive Perceived Quality (PQ) if the promotion has been made to create Brand Awareness (BA). Positive PQ helps in enhancing Brand Image (BI). Marketers need to focus on creating positive Brand Preference (BP), as BI is not sufficient in creating Brand Loyalty (BL) and Brand Repurchase (BR).

Design and redesign of a bottom trawl survey in Chesapeake Bay, USA

Fisheries-independent surveys that reliably sample a broad size range of exploited and ecologically important species provide valuable data in support of fisheries management and ecosystem science. The operational consistency of surveys over time and space is fundamental to the interpretation of data in the contexts of population dynamics processes, community interactions, policy impacts, and environmental forcing. However, the need to maintain historic sampling protocols over extended time periods limits the utilization of new technologies that could lead to improved data collection. Survey vessel replacements also become inevitable as the maturity of sampling programs becomes multidecadal. This case study describes the motivational origin, initial design, and redesign of a bottom trawl survey operating in Chesapeake Bay, the largest estuary in the United States. Regional aspirations to consider ecosystem principles in fisheries management aided initial development of the survey, and the need to collect specific data types to support that endeavor impacted several early design elements. Following the beginning years of full-scale survey operations, a consistently evolving awareness of potential areas of improvement for the survey grew from formal efforts to engage with scientific and industry partners on trawl gear design, leverage the program for additional survey opportunities, utilize gear testing technology, and analyze extant data. When the delivery of a new, state-of-the-art research vessel forced the transfer of survey operations to a new platform, all potential changes were incorporated simultaneously. A subsequent paired-tow experiment was conducted to build a calibration database that successfully provided estimates of relative selectivity for routinely sampled taxa. This experience yielded several lessons learned that are intended to aid investigators faced with adopting structural changes to fisheries-independent surveys in the future.

Preservation of cultural landscape in the historical Siberian city

Purpose: The aim of this work is to discusses the main periods of the cultural landscape formation in the historical Siberian city.Design/methodology/approach: This research is required to preserve the cultural landscape in the historical city during its construction and reconstruction. The paper presents the data analysis and refinement obtained during the literature review in the field of architecture and urban planning in Siberia. Applied are the full-scale survey methods, functional and graph-analytic analyses.Research findings: The data obtained allow identifying the main periods of the cultural landscape formation and development in the historical Siberian city interacting with natural landscape elements. The main theses are formulated for the preservation of the cultural landscape in the historical Siberian city.

The main features of the spatial structure of cities with a free landscape layout (The city of Yelets, Lipetsk region).

The object of the study is the building system of the city of Yelets, developed by medieval architects and preserved to this day. The subject of this study is the main features of the spatial composition of the city of Yelets. The work is devoted to identifying the patterns underlying the unique development, which will not only preserve the advantages of the appearance of the city, but also competently develop the space in the future, taking into account current trends. The work is based on the study of Russian cities by G. V. Alferova, conducted in the second half of the XX century. Alferova revealed the presence of a compositional design in the construction of ancient cities. In this article, Alferova's ideas are developing. As a result of a systematic analysis of sources on the history of the Yelets Region, as well as a full-scale survey of the central and right-bank parts of the city, the main features of the spatial structure of the city are determined: complex multidimensional compositions of dominants, harmoniously subordinated to the natural features of the landscape; thoughtful organization of the so-called "prozors", creating a transparent open system of the city; the ability of the city to "accommodate" and arrange there are objects of different styles nearby, provided that the general rhythmic pattern is observed. Some weak points of the city were identified, formed due to the disregard by developers of the basic principles of city development. This study can help the development of not only Yelets, but also many cities with a similar type of layout.

Behavioural responses of wild, spawning Atlantic cod (Gadus morhua L.) to seismic airgun exposure

Abstract Seismic airgun surveys to map petroleum deposits in the seabed may impact behaviour of marine animals over large distances. Understanding whether fish spawning behaviour is affected by this anthropogenic noise source is important because reproductive success may be impacted. The fine-scale behavioural responses of Atlantic cod to airgun exposure over an extended period were investigated using an acoustic telemetry positioning system on a spawning ground in Norway. During 2019 to 2021, 135 spawning cod were equipped with telemetry sensor tags and were exposed to airgun shooting during the spawning periods of 2020 and 2021, with varying received sound levels comparable to a full-scale survey at distances of 5 to >40 km. Cod demonstrated only weak responses to the disturbance from repeated 3-h treatment periods over 5-d, swimming on average slightly deeper during seismic exposure compared to silent control periods. This response varied between individuals. Longer-term effects of seismic exposure on swimming depth were not detected. No changes in swimming acceleration, displacement, or area use occurred. These results suggest that relatively distant seismic surveys do not substantially alter cod behaviour during the spawning period at received sound exposure levels varying between 115 and 145 dB re 1 µPa2s over a 5-d period.

Full-scale load testing of prefabricated combined floor of residential building built of the early 1950s

A detailed full-scale survey of building structures was carried out as a part of scientific and technical support on changing the functional purpose of building premises built in the 1950s. The purpose of the technical condition survey was to assess the bearing capacity of structures and develop conditions for mechanical building safety. Special attention was paid to the study of floor-to-floor overlapping. Over a long period of operation, numerous changes were made to the original structural solution of the building. These changes transformed the design scheme of static work of structures, floors in particular. Due to the multifactorial and difficult-to-control conditions, it wasnt easy to determine the actual bearing capacity of the overlaps with the required degree of reliability using the existing calculation methods. Therefore, in order to confirm the proposed design assumptions, full-scale tests of the overlaps were carried out by loading, which confirmed their bearing capacity determined by the calculation. The conducted field tests made it possible to avoid expensive reinforcement of structures and extend the building life.

Morphological and structural-compositional features of the historical block development of St. Petersburg

The development of the historical center of St. Petersburg has special parameters and characteristics that form the uniqueness of the city as a whole and its individual fragments. At the moment, due to the emerging urban planning errors and violations, there is a need to clarify the strategy of urban planning regulation of the historical center in order to preserve the uniqueness, integrity and quality of its architectural and urban environment. In this regard, the task of moving to a detailed and comprehensive study of the parameters of fragments of the urban environment becomes urgent. The purpose of this study is to study the existing architectural and urban planning characteristics of the residential development of St. Petersburg. The object of research is the historical block within the boundaries of Moskovsky Prospekt, Klinsky Prospekt, Bronnitskaya Street, Zagorodny Prospekt. The subject of the study is morphological and structural-compositional features of the building. On the basis of the conducted historical, archival and bibliographic surveys and a full-scale survey, the enlarged stages of the formation of the block were identified and the main patterns of the construction of the front front were determined. The morphotype of the block is a perimeter building of the historical center of St. Petersburg of the XIX century with the inclusion of objects of the mid–XX century, with irregular surveying and an incomplete system of courtyard buildings. The nature of surveying and urban fabric, which developed mainly in the second half of the XIX – mid XX century, was influenced by the planning structure laid down in the XVIII century and the location of the block in the structure of the city. The compositional organization of the front along Moskovsky Prospekt is subject to uniform principles, which made it possible to form a high-quality urban environment. The front facades have fragmentary losses of decorative elements and structural violations at the ground floor level, which can be eliminated provided that the historical rules of formation and decorative and plastic design of buildings are observed.

Reconstruction of the volume-planning parameters of schools using biophilic principles and techniques

The aim of the study is to approve the method of evaluation of school buildings, based on the use of space-planning parameters of objects, taking into account the principles and techniques of biophilic architecture. Objectives of the study: to evaluate typical projects of schools of the Soviet period, taking into account modern standards of ecological construction, requirements of bioclimatic comfort and biophilic principles, using space-planning parameters specified in the design architectural and construction drawings; consider this method as the primary step for the diagnosis of potential biophilic properties of buildings, visual connection with the environment; make a critical analysis and provide recommendations for the use of this method of assessment. The study of domestic and foreign experience in creating biophilic learning spaces showed that preliminary analysis of volumetric and planning parameters of school buildings, can be used to diagnose the potential biophilic properties of objects, such as the efficiency of daylighting, natural ventilation, visual connection with the outside environment. The study critically analyzes the plans, facades, and cuts of typical Soviet school projects from the 1960s-1970s based on contemporary building certification standards and principles of bioclimatic, biophilic architecture. The significance of the obtained results for architects and designers is that the proposed method makes it possible to give a quick initial assessment of the potential biophilic properties of an object during the development of school reconstruction projects on the basis of the volume-planning parameters of buildings specified in the project documentation without a full-scale survey.

Science electives in high school will improve nutrition knowledge but not enough to make accurate decisions.

Nutrition knowledge has been reported to have a weak positive effect on healthy eating behavior. This study aimed to determine if there was a difference in nutrition knowledge depending on the choice of science subject in high school and whether that affected the actual eating habits of college students in Japan. The subjects were 514 college students, the majority first-year students, in 3 cities in Japan. A questionnaire survey was conducted on elective subjects in science in high school, diet (11 items), lifestyle (5 items), and nutrition knowledge (34 questions). The preliminary survey was conducted on 47 students in the fall of 2019, and the full-scale survey was conducted in May-June and October-November 2021 at the end of lectures for the first-year students. The students in the high-score group (24-31 points, n = 180) had a higher intake of vegetables (odds ratio [OR], 1.78; 95% confidence interval [CI], 1.12-2.82; P = 0.015) and breakfast (OR, 1.64; 95% CI, 1.03-2.60; P = 0.035), and a reduced intake of fast food (OR, 0.27; 95% CI, 0.14-0.51; P < 0.001) than those in the low-score group (6-19 points, n = 150). Only the biology and chemistry students had significantly higher nutrition scores than the other groups (all: P < 0.001), but no significant difference was found between the other groups. Understanding nutrition learned in elementary and junior high school is appropriate, while molecular structure, recommended amount, and food poisoning were insufficient. Knowledge of nutrition appears to have a positive effect on the actual eating habits of college students. Although biology and chemistry in high school may help students understand the foundations of good nutrition, specialized food education may be required to make informed dietary choices.

Application of the reliability assessment results for pumping stations’s modernization

Work on the modernization of irrigation pumping stations in our Republic has a great relevance. Technical modernization and reconstruction of pumping stations require a reliable scientifically based methodological approach. Each pumping station regularly keeps records and controls the operation of equipment and facilities. These data in processed form can be applied in the modernization of irrigation pumping stations. On the example of the analysis of the reliability characteristics of the Kiziltepa 2 pumping station (Uzbekistan), a methodology has been developed to justify the modernization and the order of replacement of the main equipment. Comparison of the results of calculation of quantitative parameters (criteria) of reliability of pumping station equipment with the data of field tests of aggregates showed that they can diverge. Therefore, the operational reliability assessment should be carried out comprehensively, and not only the results of a full-scale survey should be taken into account, but also the quantitative parameters of the reliability of the pumping station calculated according to previous years of operation. The use of this technique will make it possible to dispense with complex tests to assess the residual life of equipment parts by destructive testing methods.

ПРЕДВАРИТЕЛЬНЫЕ ИТОГИ АРХЕОЛОГИЧЕСКОЙ РАЗВЕДКИ В НОВОКУЗНЕЦКОМ МУНИЦИПАЛЬНОМ ОКРУГЕ КЕМЕРОВСКОЙ ОБЛАСТИ - КУЗБАССА

The article presents the results of the authors’ work on the survey of a land plot in the upper reaches of the Kandalep River, Novokuznetsk Municipal District of the Kemerovo region, Kuzbass. As a result of a full-scale survey, objects of archaeological heritage were identifed: “Settlement of Kandalep-1”, “Settlement of Kandalep-2”, “Settlement of Kandalep-3”, “Settlement of Kandalep-4”, “Settlement of Kandalep-5”.

Оценка гидравлической шероховатости русла магистрального канала

The purpose of the study was to determine the roughness coefficient of the main channel bed BP-1 of the Sarpinskaya watering-irrigation system (SWIS) and to compare the data obtained with the normative values. The materials for performing the calculations were: an explanatory note to the project of the second stage of the construction of the SWIS, passports of the main and inter-farm channels of the system (2015), a technical report of the operating organization for 2021, data of full-scale measurements of the depths and velocities of the water flow in the considered alignment using the «speed-area» method, the results of full-scale surveys of the water supply network and HTS SWIS, as well as data from GIS maps and literary sources. The methodology for calculating the elements of the live section of the channels took into account the recommendations of SP 100.13330.2016. The calculation of the roughness coefficients of the channels was carried out using known dependencies, including the Chezy formula, the Manning equation, the dependencies of I.I. Agroskin and N.N. Pavlovsky. The elements of the living section are determined and the values of the roughness coeffi cient in the considered alignment of the main channel are obtained. At the same time, the calculated values of the roughness coefficient obtained have good convergence (the deviation of the results does not exceed –2.8%). However, the obtained values exceed the normative value of the roughness coefficient by 1.6-1.64 times, which is explained not only by the overgrowth of the channel bed with aquatic vegetation, but also by the peculiarity of the shape of the cross-section of this channel, which in the area under consideration has a signifi cant width along the bottom. The calculated values of the roughness coeffi cient obtained indicate the overgrowth of the main canal bed, which was confi rmed during field surveys of the water supply network of this canal in the spring of 2022. In view of this, it is necessary to carry out preventive measures in a timely manner aimed at reducing the additional hydraulic resistance caused by overgrowth of the riverbed with vegetation.

НАТУРНОЕ ОБСЛЕДОВАНИЕ ДЛИТЕЛЬНО ЭКСПЛУТИРУЮЩЕГОСЯ ПРАВОЕГОРЛЫКСКОГО КАНАЛА В УСЛОВИЯХ КЛИМАТИЧЕСКИХ ИЗМЕНЕНИЙ СТАВРОПОЛЬСКОГО КРАЯ

The article provides the results of a full-scale survey of the Pravoegorlyk Canal, commissioned in 1957. The reasons for the deterioration of operational indicators due to climatic changes in the Stavropol Territory were analyzed.

Revisiting the Geographical Distribution of Thyroid Cancer Incidence in Fukushima Prefecture: Analysis of Data From the Second- and Third-round Thyroid Ultrasound Examination.

After the first-round (Preliminary Baseline Survey) ultrasound-based examination for thyroid cancer in response to the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, two rounds of surveys (Full-scale Survey) have been carried out in Fukushima Prefecture. Using the data from these surveys, the geographical distribution of thyroid cancer incidence over 6 or 7 years after the disaster was examined. Children and adolescents who underwent the ultrasound-based examinations in the second- and/or third-round (Full-scale) survey in addition to the first-round survey were included. With a discrete survival model, we computed age, sex, and body mass index standardized incidence ratios (SIRs) for municipalities. Then, we employed spatial statistics to assess geographic clustering tendency in SIRs and Poisson regression to assess the association of SIRs with the municipal average absorbed dose to the thyroid gland at the 59-municipality level. Throughout the second- and third-round surveys, 99 thyroid cancer cases were diagnosed in the study population of 252,502 individuals. Both flexibly shaped spatial scan statistics and maximized excess events test did not detect statistically significant spatial clustering (P = 0.17 and 0.54, respectively). Poisson regression showed no significant dose-response relationship: the estimated relative risks of lowest, middle-low, middle-high, and highest areas were 1.16 (95% confidence interval [CI], 0.52-2.59), 0.55 (95% CI, 0.31-0.97), 1.05 (95% CI, 0.79-1.40), and 1.24 (95% CI, 0.89-1.74). There was no statistical support for geographic clustering or regional association with radiation dose measures of the thyroid cancer incidence in the cohort followed up to the third-round survey (fiscal years 2016-2017) in Fukushima Prefecture.