Analytic Maps Research Articles

Delineating Structural Features Related to Hydrothermal Alterations for Possible Mineralization in Share Area, Kwara State Nigeria Using Aeromagnetic Data

Mineral deposits of significant economic value are abundant in the subsurface of Nigeria, presenting a promising alternative to the nations over dependence on petroleum revenues. This study interprets aeromagnetic data from Share, Kwara State, Nigeria, to delineate subsurface structural features associated with hydrothermal zones, which are key indicators for potential mineralization. The methodologies applied upward continuation, analytic signal, tilt derivative, and first vertical derivative (FVD). These offer insights into subsurface geology that can be broadly applied in geophysical exploration and mineral resource management. The results reveal structural trends predominantly in the NE–SW direction, with some NW–SE alignments, indicative of hydrothermal alterations linked to mineral deposits. The analytical signal map identified amplitude values ranging from 0.004 nT/m to 0.073 nT/m, with low and intermediate magnetic intensities linked to sediment-filled basement rocks and possible limestone and sandstone formations. High-gradient anomalies, 1.280 nT/m to 1.374 nT/m, were attributed to geological contacts, fractures, dykes, and hydrothermal vents. Depth estimates from the source parameter imaging map revealed hydrothermal and structural zones at depths ranging from 287.9 m to 1360.7 m, with deeper sources >1202.1 m indicating tectonic activity and mineralization potential. The FVD and Tilt Derivative maps further highlighted faulted zones, shear structures, and intrusive bodies with intensities between 0.031 nT/m and 0.041 nT/m, suggesting active tectonics. High magnetic anomalies in the central, northeastern, and southeastern regions were identified as prime targets for exploration, indicating magnetite-rich bodies, igneous intrusions, and hydrothermal zones. Integrated exploration strategies combining geophysical, geochemical, and structural data are recommended to refine anomaly delineation, prioritize field validation, and enhance mineralization discovery. These findings establish the Share area as a promising site for regional mineral exploration, supporting Nigeria’s diversification efforts toward sustainable resource development.

Hydrocarbon Potential Evaluation of Chad Basin, Northeastern Nigeria Using High-Resolution Aeromagnetic Data

A cost-effective and non-intrusive aeromagnetic geophysical technique was utilized to reduce exploration uncertainty in the Chad Basin, which is believed to have significant hydrocarbon potential despite limited exploration due to its remote and challenging terrain. By analyzing various derivatives and magnetic attributes extracted from filtered and enhanced aeromagnetic data, the study aimed to highlight potential areas for hydrocarbon generation and preservation, allowing for more focused and detailed geophysical exploration efforts. This study produced several key maps, including a total magnetic intensity map (ranging from -168.7 to 224.8 nT), a reduction to equator map (ranging from -156.8 to 207.9 nT), and depth analysis, which helped delineate the structural framework and sedimentary thicknesses within the basin. Quantitative interpretation of these maps, along with the analytic depth map (ranging from 22.1 to 5649.3 m), tilt depth map (ranging from -76.50 to 80.40), and first and second vertical derivatives maps (ranging from -0.097 to 0.086 nT/m and -0.000240 to 0.000236 nT/m, respectively), was employed to detect geological features and thick sedimentary fills sufficient to create or trap hydrocarbons. Depth estimates indicate that the shallow sources range between 22 and 230 m, while deeper sources fall between 2747 and 6000 m, suggesting sufficient sedimentary fill for hydrocarbon generation. The basin is characterized by large sedimentary deposits that are bounded by structural features such as folds, faults, and fractures. The northern part of the basin, trending towards the northwest, eastern edge, and parts of the south, showed active structural features, including anticlines, synclines, and fractures, which are essential for petroleum trapping. These findings, coupled with the identified thicknesses and favorable structural disposition, suggest that the Chad Basin holds high potential for hydrocarbon accumulation, making it a prospective region for further exploration with more detailed geophysical methods.

Institutional design in commons-based sharing economies: platform, care and place

AbstractThis paper presents an analytical mapping of institutional design possibilities for alternative ways for digital platforms to institutionalise property and corporate form. It builds on the institutional imagination catalysed by three vignettes of experimental sharing economy initiatives presented towards the start of the paper, each of which highlights the imbrication and interdependence between economic and social dimensions of the sharing economy. The paper then interrogates the vignettes through three analytical entry points to the institutional design of commons-based sharing economies: platform, care and place. By remapping the vignettes’ practices around these three entry points, the paper shows how they help constitute the incipient formalisation of commons-based approaches to the sharing economy. The prospects for carrying out a redesign of property and corporate forms more generally thereby become more visible, providing a sound foundation for more in-depth empirical and historical work on alternative trajectories of the sharing economy in the future.

Extracurricular activities as a pedagogy for the 2030 Agenda integration in an architectural engineering curriculum: a case study

Purpose Considering the lack of integration of sustainable development goals (SDGs) within architectural engineering education, the purpose of this study is to develop a framework that incorporates the SDGs into a programme through extracurricular research activities. Design/methodology/approach A framework based on case studies was examined. The framework uses extracurricular activities, including an integrated design process and analytical mapping tool. These were accompanied by a comprehensive list of the 17 SDGs and their interpretations. Findings The framework enabled students to develop a systematic understanding of sustainability early on in their design process, leading to a more comprehensive consideration of architectural design issues and increased motivation to prioritise sustainability in architecture. Research limitations/implications The focus was on extracurricular activities rather than integrating the framework into the main programme. Therefore, further research is needed to explore this integration within the core curriculum. Practical implications The implications of research initiatives and extracurricular activities in promoting understanding of the SDGs among undergraduates were highlighted. The recommendations may be valuable for academic institutions aiming to align their planning in higher education with the necessary skills and global requirements as outlined in Agenda 2030. Originality/value The originality of this study lies in its contribution from the field of architectural engineering and its endeavour to incorporate the SDGs into a programme in the Middle East through a research-based approach.

Application of cuttings natural gamma spectroscopy logging technology in well A-1

Abstract The H-1 well revealed significant disparities between the Paleozoic strata in the Northern Jiangsu Basin and the anticipated stratigraphy prior to drilling, posing substantial challenges to the swift determination of stratigraphic ages at the site. Geological logging can obtain very limited data, such as rock color and lithology, and falls short of achieving precise lithologic identification and detailed stratification; while the X-ray diffraction logging(XRD) can initially analyze mineral content, it is unable to delineate the classification of clay mineral species.Cuttings natural gamma spectroscopy logging can precisely analyze the gamma-ray energy spectrum produced by the decay of radioactive isotopes within the formation, primarily comprising potassium, thorium, and uranium.The concentrations of Uranium (U), Thorium (Th), and Potassium (K) in rocks are intimately associate with the lithology, the extent of organic matter content, and the sedimentary environment . This technology facilitates the quantitative assessment of potassium, thorium, and uranium content within the formation. Its application has proven to be crucial for accurately identifying lithologies, conducting detailed stratigraphic comparisons, performing in-depth sedimentary environment analyses, and evaluating organic matter content.The cuttings natural gamma spectroscopy data of H-1 well shows good correlation with the natural gamma logging data, which can meet the requirements of accurate lithology identification; the rocks of different strata in the analytical map can meet the requirements of fine stratum division; the correlation coefficient between U element content and Total Organic Carbon (TOC) content is up to 0.974, which is feasible to calculate the TOC with U element content; finally, the deposition environment analysis based on natural gamma spectral recording confirmed by the analysis of trace elements.

Карты оценки социально-экономической среды для развития социокультурных видов туризма: опыт Крыма

The methodology for compiling an assessment map of the degree of favorableness of the socio-economic environment for the development of socio-cultural types of tourism in Crimea is considered. A hypothesis has been put forward about the existence of a territorial disproportion in the degree of favorableness of the socio-economic environment for the development of socio-cultural types of tourism in the plain, mountain and coastal regions of the Crimean Peninsula. The nature of territorial imbalances in the favorable socio-economic environment of socio-cultural tourism is due to differences in the saturation of the Crimean territories with cultural heritage objects and the state of general economic and special infrastructure. Sociocultural types of tourism include specific forms and processes of organization and development of the sociocultural space of the region aimed at satisfying the cognitive, spiritual, moral, communicative and aesthetic needs of people. Groups of socio-economic conditions and factors that are important for the development of socio-cultural types of tourism in Crimea have been identified. Analytical maps of the territorial structure of the cultural heritage of Crimea and the conference tourism infrastructure on the peninsula have been constructed, reflecting certain aspects of the socio-economic environment of the region, influencing the degree of its favorableness for the organization of various types of socio-cultural tourism. A score assessment was made of the degree of favorable socio-economic conditions for the development of socio-cultural types of tourism in the context of 11 urban districts and 14 municipal districts of the Republic of Crimea and the city of Sevastopol, with subsequent visualization of the results in the form of a comprehensive analytical and synthetic map. The map of the favorableness of the socio-economic environment of Crimea for the development of socio-cultural types of tourism confirmed the presence of territorial imbalances for this type of recreation on the peninsula. More than half of the territorial-administrative units of Crimea have a low degree of favorable socio-economic environment for the development of socio-cultural types of tourism. It is concluded that it is necessary to change the information image of Crimea to motivate tourists to visit its plain (steppe) regions and saturate territories with a low degree of favorable socio-economic environment with artificial attractions for socio-cultural tourism.

Analytic mappings of the unit disk which almost preserve hyperbolic area

AbstractIn this paper, we study analytic self‐maps of the unit disk which distort hyperbolic areas of large hyperbolic disks by a bounded amount. We give a number of characterizations involving angular derivatives, Lipschitz extensions, Möbius distortion, the distribution of critical points and Aleksandrov–Clark measures. We also examine the Lyapunov exponents of their Aleksandrov–Clark measures.

Optimizing pipeline assembly: a novel model for predicting assembly pose considering clamp constraints

PurposeThis paper aims to develop an optimization model to enhance pipeline assembly performance. It focuses on predicting the pipeline’s assembly pose while ensuring compliance with clamp constraints.Design/methodology/approachThe assembly pose of the pipeline is quantitatively assessed by a proposed indicator based on joint defects. The assembly interference between the pipeline and assembly boundary is characterized quantitatively. Subsequently, an analytical mapping relationship is established between the assembly pose and assembly interference. A digital fitting model, along with a novel indicator, is established to discern the fit between the pipeline and clamp. Using the proposed indicators as the optimization objective and penalty term, an optimization model is established to predict the assembly pose based on the reinforced particle swarm optimization, incorporating a proposed adaptive inertia weight.FindingsThe optimization model demonstrates robust search capability and rapid convergence, effectively minimizing joint defects while adhering to clamp constraints. This leads to enhanced pipeline assembly efficiency and the achievement of a one-time assembly process.Originality/valueThe offset of the assembly boundary and imperfections in pipeline manufacturing may lead to joint defects during pipeline assembly, as well as failure in the fit between the pipeline and clamp. The assembly pose predicted by the proposed optimization model can effectively reduce the joint defects and satisfy clamp constraints. The efficiency of pipeline modification and assembly has been significantly enhanced.

Fractional conformal map, qubit dynamics and the Leggett–Garg inequality

Abstract A pure state of a qubit can be geometrically represented as a point on the extended complex plane through stereographic projection. By employing successive conformal maps on the extended complex plane, we can generate an effective discrete-time evolution of the pure states of the qubit. This work focuses on a subset of analytic maps known as fractional linear conformal maps. We show that these maps serve as a unifying framework for a diverse range of quantum-inspired conceivable dynamics, including (i) unitary dynamics,(ii) non-unitary but linear dynamics and (iii) \ non-unitary and non-linear dynamics where linearity (non-linearity) refers to the action of the discrete time evolution operator on the Hilbert space. We provide a characterization of these maps in terms of Leggett-Garg Inequality complemented with No-signaling in Time (NSIT) and Arrow of Time (AoT) conditions.

On the boundedness of solutions of a forced discontinuous oscillator

We study the global boundedness of the solutions of a non-smooth forced oscillator with a periodic and real analytic forcing. We show that the impact map associated with this discontinuous equation becomes a real analytic and exact symplectic map when written in suitable canonical coordinates. By an accurate study of the behaviour of the map for large amplitudes and by employing a parametrization KAM theorem, we show that the periodic solutions of the unperturbed oscillator persist as two-dimensional tori under conditions that depend on the Diophantine conditions of the frequency, but are independent on both the amplitude of the orbit and of the specific value of the frequency. This allows the construction of a sequence of nested invariant tori of increasing amplitude that confine the solutions within them, ensuring their boundedness. The same construction may be useful to address such persistence problem for a larger class of non-smooth forced oscillators.

Unveiling 5-fluorouracil anti-cancer drug encapsulation within pristine and silver-doped boron, aluminum, and gallium nitride nanotubes: A DFT investigation for advancing nanomedicine

Nanomaterials represent a promising frontier in drug delivery systems for combating cancer, offering precise targeting of tumour cells. This study delves into the encapsulation capabilities of 5-fluorouracil (5-FU) on pristine armchair (6,6) single-wall boron-, aluminium-, and gallium-nitride nanotubes (BNNT, AlNNT, GaNNT), both in their natural state and doped with silver (Ag) atoms under gas phase and water solution conditions. Employing density functional theory calculations at the M06-2X level, we scrutinise the geometric stabilities, encapsulation efficiencies, and electronic interactions between 5-FU molecules and NNTs. Our results reveal that a shorter distance between the drug and nanotube cavity enhances encapsulation ability and solubility while facilitating larger charge transfers, especially within Ag-doped NNTs. The Ag doping significantly augments the reactivity of NNTs towards 5-FU molecules, with thermodynamic analyses indicating exothermic and spontaneous interactions with Ag-doped NNTs. The decapsulation of 5-FU from Ag-BNNT, Ag-AlNNT, and Ag-GaNNT necessitates recovery time 6.42E+00, 3.21E+05, and 2.19E−04 s, with corresponding adsorption energies of −38.70, −49.52, and −28.42 kcal/mol, respectively. Electronic analyses demonstrate notable changes in states’ energy gap and density post-5-FU encapsulation in Ag-doped NNTs, suggesting enhanced sensitivity. Moreover, our investigation delves into topological features, molecular stability, bond strength, and intermolecular interactions using various analytical techniques, including MEPs, ELF maps, NBO, QTAIM, Hirshfeld surface, and RDG analyses. These comprehensive findings underscore the potential of Ag-doped NNTs as promising components for drug delivery systems and biosensors in nanomedicine applications, particularly in sensing and catalytic functions for 5-FU molecule encapsulation and detection.

Determination of Sustainable Factory Locations for the Lemon Agroindustry using AHP, Mapping and Water Management

This research was conducted in Suntenjaya Village, Lembang, and West Bandung Regency, focusing on lemon agro-industrial development. Research was conducted using the Analytical Hierarchy Process (AHP) approach, area mapping, and water management to determine a sustainable factory location. The main objective is the selection of factory sites by integrating lemon production, considering sustainable agriculture aspects, product aspects, and water conservation programs. The results of this study provide a strong foundation for sustainable agro-industrial development that will support sustainable agriculture, local economy, and environmental protection. The research also combined qualitative and quantitative elements with a mixed approach that included Focus Group Discussion (FGD) and AHP, and the results showed that integrated drainage management was the top priority, followed by sanitation, clean water, reforestation, and sustainable agriculture. Mapping of areas based on geographical characteristics, such as rainfall, slope, and soil type, provided a map of water infiltration rates, which became a key guide in planning water conservation programs. The ultimate location for the lemon agroindustry is half of Desa Suntenjaya, mostly from the center to the northern area, which needs to consider proximity to markets in Bandung Regency and City, easy access to sources of raw materials for lemons, water availability, adequate transportation infrastructure, access to energy sources, suitable climate for lemon growth, and the availability of adequate labor in the region.

An Electrochemical Biosensor for the Detection of Pulmonary Embolism and Myocardial Infarction.

Due to the clinical similarities between pulmonary embolism (PE) and myocardial infarction (MI), physicians often encounter challenges in promptly distinguishing between them, potentially missing the critical window for the correct emergency response. This paper presents a biosensor, termed the PEMI biosensor, which is designed for the identification and quantitative detection of pulmonary embolism or myocardial infarction. The surface of the working electrode of the PEMI biosensor was modified with graphene oxide and silk fibroin to immobilize the mixture of antibodies. Linear sweep voltammetry was employed to measure the current-to-potential mapping of analytes, with the calculated curvature serving as a judgment index. Experimental results showed that the curvature exhibited a linear correlation with the concentration of antigen FVIII, and a linear inverse correlation with the concentration of antigen cTnI. Given that FVIII and cTnI coexist in humans, the upper and lower limits were determined from the curvatures of a set of normal concentrations of FVIII and cTnI. An analyte with a curvature exceeding the upper limit can be identified as pulmonary embolism, while a curvature falling below the lower limit indicates myocardial infarction. Additionally, the further the curvature deviates from the upper or lower limits, the more severe the condition. The PEMI biosensor can serve as an effective detection platform for physicians.

FORMATION OF THE ARCHITECTURAL AND URBAN PLANNING SPACE OF OXBOW LAKES: SCIENTIFIC AND PRACTICAL EXPERIENCE

Problem statement. Following the adoption of Law No. 1641-VIII on October 4, 2016, the Ukrainian legislation introduced the “basin management principle”. This principle entails comprehensive (integrated) management of water resources within the river basin area [1]. In the valleys of lowland rivers with numerous bends, particularly in the Dnipro, Danube, and Vistula rivers, oxbow lakes are formed, representing remnants of old river channels. Oxbow lakes are small lakes that form on floodplains due to erosion and sediment deposition. In large cities, such lakes are important centers of biological diversity, improve microclimate, act as barriers to floods, and have an attractive appearance. However, oxbow lakes are susceptible to drying up, silting, and turning into marshes. Therefore, research on oxbow lakes in the context of urban planning is highly necessary to prevent chaotic development and preserve similar ecosystems. Additionally, the consolidation of experience in the development and rehabilitation of such objects is practically significant for urban planning. Research objective. The purpose is to examine and summarize the scientific and practical experience in forming the architectural and urban planning space along oxbow lakes. Conclusion. Scientific research in the fields of hydraulic engineering, agronomy, and urban planning that can be implemented in urban planning practice to address oxbow lake issues has been identified and systematized. Using satellite imagery and analytical maps, patterns in the organization of oxbow lake spaces in the largest cities of Ukraine have been identified. Similarly, examples of planning and development of lakeside (old riverbed) territories in Europe, America, Asia, and Oceania have been found and analyzed. Successful practical solutions for the use of scientific and technical methods for preserving oxbow lakes have been identified in the aforementioned examples. Patterns and trends in organizing development and street networks around small floodplain lakes and oxbow lakes have been revealed.

Unstability problem of real analytic maps

AbstractAs well known, the stability of proper maps is characterized by the infinitesimal stability. In the present paper, we study the counterpart in real analytic context. In particular, we show that the infinitesimal stability does not imply stability; for instance, a Whitney umbrella is not stable. A main tool for the proof is a relative version of Whitney's analytic approximation theorem that is shown by using H. Cartan's Theorems A and B.

Mapping of chromite occurrence in a meta-ultramafic complex by magnetometric prospecting, Sul-Riograndense Shield (Southern Brazil)

This study presents the use of terrestrial magnetometry method in the characterization of a metamorphic and chromium-mineralized ultramafic body in the São Sepé region (RS). Several serpentinite exposures were recognized in the study area, characterized by a very evident schistosity marked by amphiboles and micas. The most preserved rocks are gray to dark green in color, silky to the touch and with folds and variable fracturing. The chromite present in serpentinites is associated with magnetite, and occurs in the form of small lenses. 1677 reading lines were made perpendicular to the main direction of the meta-ultramafic body, with 25m spacing between measurement points. The magnetometric maps revealed high-intensity anomalies related to meta-ultramafic rocks. 1677 reading lines were made perpendicular to the main direction of the meta-ultramafic body, with 25m spacing between measurement points. The magnetometric maps revealed high-intensity anomalies related to meta-ultramafic rocks. The results revealed the existence of highly magnetic individualized lenses orientated according to NE / SW, related to regional deformation events, with remobilization and mineral reconcentration. The direct relationship between high magnetization and chromite/ferro-chromite concentrations allows relatively detailed mapping of potentially mineralized areas, revealing dimensions more significant than the limits of the meta-ultramafic sequence defined in the geological map. The results indicate that the analytical signal amplitude map is a highly recommended product for planning sampling actions and reserve quantification, improving classical geological mapping.

English

english

Bath-Engineering Magnetic Order in Quantum Spin Chains: An Analytic Mapping Approach.

Dissipative processes can drive different magnetic orders in quantum spin chains. Using a nonperturbative analytic mapping framework, we systematically show how to structure different magnetic orders in spin systems by controlling the locality of the attached baths. Our mapping approach reveals analytically the impact of spin-bath couplings, leading to the suppression of spin splittings, bath dressing and mixing of spin-spin interactions, and emergence of nonlocal ferromagnetic interactions between spins coupled to the same bath, which become long ranged for a global bath. Our general mapping method can be readily applied to a variety of spin models: we demonstrate (i)a bath-induced transition from antiferromagnetic (AFM) to ferromagnetic ordering in a Heisenberg spin chain, (ii)AFM to extended Neel phase ordering within a transverse-field Ising chain with pairwise couplings to baths, and (iii)a quantum phase transition in the fully connected Ising model. Our method is nonperturbative in the system-bath coupling. It holds for a variety of non-Markovian baths and it can be readily applied towards studying bath-engineered phases in frustrated or topological materials.

B–plane assisted trajectory design with analytical mapping of swing-by parameters

The Artemis program has gathered further attention due to the transfer trajectories to the Moon and beyond. Trajectories such as weak stability boundary and ballistic lunar transfer are known as low-energy transfer toward the vicinity of the Moon. Among these categories, using the Moon swing-by contributes to the reduction of fuel consumption. In this study, we investigate trajectory design with the Moon swing-by as a constraint, and propose a methodology that projects swing-by parameters onto a conventional B–plane to facilitate the efficient analysis and design of post swing-by trajectories. This proposed approach not only enables a comprehensive understanding of all candidate solutions at each swing-by, but also provides flexibility in response to varied swing-by conditions. As illustrative examples, this paper demonstrates transfer problems to periodic orbits in the Earth–Moon system.

Some remarks about $$ \rho $$-regularity for real analytic maps

Some remarks about $$ \rho $$-regularity for real analytic maps