Quality Of Stone Research Articles

The impact of deep learning image reconstruction of spectral CTU virtual non contrast images for patients with renal stones

PurposeTo compare image quality and detection accuracy of renal stones between deep learning image reconstruction (DLIR) and Adaptive Statistical Iterative Reconstruction-Veo (ASIR-V) reconstructed virtual non-contrast (VNC) images and true non-contrast (TNC) images in spectral CT Urography (CTU). MethodsA retrospective analysis was conducted on images of 70 patients who underwent abdominal-pelvic CTU in TNC phase using non-contrast scan and contrast-enhanced corticomedullary phase (CP) and excretory phase (EP) using spectral scan. The TNC scan was reconstructed using ASIR-V70 % (TNC-AR70), contrast-enhanced scans were reconstructed using AR70, DLIR medium-level (DM), and high-level (DH) to obtain CP-VNC-AR70/DM/DH and EP-VNC-AR70/DM/DH image groups, respectively. CT value, image quality and kidney stones quantification accuracy were measured and compared among groups. The subjective evaluation was independently assessed by two senior radiologists using the 5-point Likert scale for image quality and lesion visibility. ResultsDH images were superior to AR70 and DM images in objective image quality evaluation. There was no statistical difference in the liver and spleen (both P > 0.05), or within 6HU in renal and fat in CT value between VNC and TNC images. EP-VNC-DH had the lowest image noise, highest SNR, and CNR, and VNC-AR70 images had better noise and SNR performance than TNC-AR70 images (all p < 0.05). EP-VNC-DH had the highest subjective image quality, and CP-VNC-DH performed the best in lesion visibility. In stone CT value and volume measurements, there was no statistical difference between VNC and TNC (P > 0.05). ConclusionThe DLIR-reconstructed VNC images in CTU provide better image quality than the ASIR-V reconstructed TNC images and similar quantification accuracy for kidney stones for potential dose savings.The study highlights that deep learning image reconstruction (DLIR)-reconstructed virtual non-contrast (VNC) images in spectral CT Urography (CTU) offer improved image quality compared to traditional true non-contrast (TNC) images, while maintaining similar accuracy in kidney stone detection, suggesting potential dose savings in clinical practice.

Effect of quartz sand addition on pore formation mechanism of blast furnace slag microcrystalline cast stone

Microcrystalline cast stone is a silicate inorganic nonmetallic material prepared via a melting–casting–crystallization process using slag as the main raw material and appropriate nucleating, quenching, and tempering agents. However, crystallization of the microcrystalline cast stone causes overall shrinkage, producing defects such as holes on the surface and inside and affecting the quality and yield. In this work, the effect of quartz-sand addition on the formation of voids in microcrystalline cast stone prepared from blast-furnace slag is studied. The theoretical composition, phase transformation, and microstructure of microcrystalline cast stone are analyzed through FactSage thermodynamic calculations, X-ray diffraction, and scanning electron microscopy. The results show that the main crystal phases in the microcrystalline cast stone are gehlenite and akermanite for 5, 7, 8, and 10 % quartz-sand addition. When the amount of quartz sand added is 8 %, the overall shrinkage rate of the ordinary augite phase is 16 %. The maximum amount of dicalcium silicate is formed, filling the holes on the surface and inside and inhibiting the formation of holes. The crystal morphology is snowflake-like and the crystal connections are dense. The flexural strength reaches a maximum value of 40.08 MPa, which improves the overall performance of the microcrystalline cast stone. The results of this study can provide technical support for improving the yield and quality of microcrystalline cast stone prepared by melting.

Particle size reduction influences starch and protein functionality, and nutritional quality of stone milled whole wheat flour from hard red spring wheat

Flour particle size (PS) distribution plays a crucial role in determining the functional properties of starch, protein, and influences the nutritional properties, which ultimately is reflected in the end-product quality. For stone-milled whole wheat flour (WWF) bakers often prefer finer PS for improved color and texture, despite this can sometimes negatively affect other quality aspects. Therefore, understanding the contribution of PS reduction on the functional properties of stone-milled WWF is crucial. This study investigated Hard Red Spring (HRS) WWF of which the mean PS was reduced from 151 μm to 117 μm, the possible finest PS by a “Kombi mill type A 500 MSM” stone mill. PS reduction increased starch damage from 6.58% to 6.71%. Also, the amylose content reduced from 31.7% to 29.4%. However, an increase in syneresis, solubility, oil-holding capacity, and peak viscosity was observed. Glutopeak and wet gluten showed an increased gluten strength. Glutenin/gliadin, polymeric/monomeric protein ratios, and percentage of unextractable polymeric protein were increased by 2.10%, 4.11%, and 4.55%, respectively, indicating increased availability of proteins with relatively larger molecular sizes by PS reduction. The relative proportion of glutenin and gliadin subgroups were also changed. Dietary fiber and resistant starch contents were found to be lower. However, the reduction in phytic acid and FODMAPs is considered beneficial. PS reduction ultimately improved bread loaf volume and crumb structure. Overall, PS reduction of WWF by stone-milling brought positive changes to several functional properties of protein and starch and positively improved the dough rheology and end-product quality.

INVESTIGATION OF THE DEFORMATION STABILITY OF CEMENT STONE WITH THE ADDITION OF BASALT FIBER

Among the requirements for ensuring the quality of cementing of the production chain, a special place is occupied by the issue of ensuring the integrity of the cement stone during the operation of the well. Despite the fact that many methods of solving the problem are proposed, it is necessary to improve the quality of cement stone, especially its resistance to dynamic loads. In this regard, in order to ensure the deformation stability of grouting stones, the composition of grouting stones with the use of basalt fiber was tested. The deformation stability of cement stone was studied on the device Micis-200-3. Based on experimental studies, a mixture of basalt fiber in a concentration of 0.5% ensured the deformation stability of cement stone, observing the requirements for the technological properties of cement mortars.

Building Granite Characterisation, Construction Phases, Mason’s Marks and Glyptography of Nossa Senhora de Guadalupe Church, Mouçós e Lamares, Galicia-North Portugal Euroregion

The Romanesque church of Nossa Senhora de Guadalupe of Mouçós e Lamares is located in Vila Real (North of Portugal). The exterior part of its nave is preserved almost unaltered. Most of the granite ashlars and corbels that make up this church have a mason’s mark in the centre of their faces. The building granites (Sanguinhedo and Vale das Gatas) have been identified and characterised petrographically and petrophysically. The mason’s marks have been as well identified; all the ashlars with visible mason’s marks have been mapped, and a glyptographic study has been carried out. In addition, the surface roughness of ashlars was measured. All these analyses have made it possible to locate the main historical quarry, to calculate the number of stonemasons who worked in the construction of the church, and to determine its construction phases. There are eight main types of mason’s marks on the nave façades. The quarrymen extracted the main building granite (Sanguinhedo granite) from the same quarry, or from nearby quarries. Although the most experienced stonemason has been identified, most stonemasons worked as a team during all construction phases of the church. Techniques such as petrography, ultrasonic P wave velocity, colourimetry, roughness and the determination of hydric properties will guarantee the quality and durability of the heritage stone for restorations. In addition, the glyptographic analysis revealed important historical and ethnographic findings that will be very useful for the appreciation of the monument. Therefore, the knowledge of built heritage, such as mason’s marks contribute to the conservation of historical quarries and traditions, as well as help understand the close cultural association societies have had with heritage stones. In this way, the scientific corpus of historical-cultural heritage can face for the development of tourism in Galicia-North Portugal Euroregion in a long-lasting sustainable way.

Kilka językowo-kulturologicznych uwag o perłach współtworzących sztuczną biżuterię

A phenomenon of organic stones, today regarded as precious stones, namely pearls, is the fact that they have never gone out of fashion. Their enduring popularity has been exploited by the creators of artificial jewellery, which – like real pearls and their imitations – has accompanied humans since ancient times. The subject of this article is comments on the names of pearls and terms associated with pearls incorporated into “secondary jewels”. In the Polish language one- and multi-word names have been preserved, among others for: a) different types of these (less frequently used) natural stones and their (more frequently used) artificial counterparts, b) morphic pearls, c) chromatic qualities of pearls, d) the quantity and quality of stones used, e) the type of framing of both organic and artificial stones, f) metal studded with pearls, g) the complementary properties of artificial and natural pearls, h) names that reflect the diversity of “secondary” jewellery “pearl” designations and details that co-create them. These names are further complemented by professional jewellers’ terms related to pearls that enrich these artificial items of value. All the linguistic testimony or “linguistic data” presented in this proposal allows for the redefinition, verification, complementation, modification and thus expansion of the concept of artificial jewellery.

THE EXPERT ASSESSMENT OF SEMI-PRECIOUS STONES (ON THE EXAMPLE OF THE PEGMATITES OF THE DEPOSITS OF THE YELISEYEVSKY ORE FIELD)

The purpose of the article is to characterize the problematic issues of regulatory and legal support for the circulation of semi-precious stones with regard to improving the assessment of their quality and value, to propose directions for their solution using the example of written pegmatites of the Eliseiv field. Methodology. The methodological basis of the research is general scientific and special methods of scientific knowledge. The method of system-structural analysis made it possible to investigate the norms of domestic legislation regulating the extraction, production and use of precious and semi-precious stones, control over operations with them and the rules of their attestation, to express a number of critical remarks about the lack of regulations, technical instructions and price lists regarding pegmatite as a semi-precious stone stones of the second order. The use of statistical, mathematical, physical and other special research methods made it possible to investigate written pegmatite within the framework of forensic gemological examination in view of its physical, technological and aesthetic properties, as well as to distinguish groups based on established quality criteria. Scientific novelty. The regulatory and legal problems are identifieded in the legislation of Ukraine in determining the status, cost, confinement to a specific deposit of semiprecious stones. On the example of pegmatites of the Eliseiv ore field, the solutions in the expert evaluation of semiprecious stones are proposed, including the identification of quality criteria, the creation of reference collections, the formation of price lists taking into account the consumer properties of products. Conclusions. The legal framework in the field of regulation of extraction, production and use of precious and semi-precious stones, control over operations with them and their certification was analyzed. The problems of regulatory and legal provision of expert evaluation of semi-precious stones, in particular, written pegmatite as a semi-precious stone of the second order, are outlined. The cause-and-effect relationships of regulatory and legal support for the circulation of semi-precious stones in the context of improving the assessment of the quality and value of semi-precious stones (on the example of Eliseiv pegmatites) have been proven. Directions for solving the problems of regulatory and legal provision of expert evaluation of semi-precious stones are proposed using the example of written pegmatites of Eliseiv field. At the same time, it was established that written pegmatites are occur in different genetic types, but granite pegmatites are of greatest commercial interest due to their high decorative characteristics. The quality criteria of written pegmatites (color, size and shape of ichthyoglypts, smoothness, pattern) were defined, on the basis of which decorative varieties of pegmatites were selected: light pink, light brown, do purple, parquet pink, purple tiger, pink leopard, light gray, brown-pink looped). It was established that the absence of state standards (price lists, technical conditions, quality criteria) for pegmatite creates certain difficulties in observing the main principles of forensic examination – the completeness and objectivity of research. It has been proven that currently the most priority task is the development of methodological recommendations for the forensic gemological examination of semi-precious stones.

Analysis of Image Fusion Effect in Image Quality of Kidney Stone

Kidney stones are a disease due to the buildup of substances that are not needed in the urinary system. Knowledge of the composition and type of stone is required in the treatment of action. Micro CT is one of the modalities that can be used in determining the composition of kidney stones. However, there are limitations when using single-energy micro-CT. Stone attenuation has almost the same value when using single energy, therefore it is necessary to use dual-energy CT to determine the difference in stone attenuation more precisely. The image of the dual-energy CT micro-energy stone needs to be processed before analyzing and determining the rock composition. Image fusion is one of the image processing techniques that can be used. The purpose of this study was to determine the effect of image fusion on the image quality of five kidney stones. The stages in the research carried out are collecting high energy and low energy projection image data, and performing image fusion on the two projected image data. The results obtained are first, the dual-energy CT image fusion affects the image quality which can be seen from the increase in the signal to noise ratio (SNR) value. A high SNR value provides the best image quality information

Association between sleep quality and urolithiasis among general population in Western China: a cross-sectional study

BackgroundGrowing number of studies have evidently shown that sleep disorders are associated with the recently increased risk of various diseases in general human population. However, the relationship between sleep quality and urolithiasis condition in humans is still unclear. The present study explored the relationship between quality of sleep and urolithiasis in Chinese population of population, western China and hence investigated the effects of sleep quality on urolithiasis disease.MethodsA cross-sectional analysis was performed using data from the West China Natural Population Cohort Study (WCNPCS). The data was collected between May 2019 and June 2021. This study evaluated the association between the sleep quality and urolithiasis. The sleep quality was assessed using the Chinese version of the Pittsburgh Sleep Quality Index (PSQI) whereas urolithiasis, as the outcome was a binary variable. Multivariable logistic regression models that adjust the sociodemographic characteristics and health-related factors were used to assess the association between sleep quality and urolithiasis. Interaction was tested in prespecified subgroup of interest.ResultsAfter adjusting a series of confounding variables, the Pittsburgh Sleep Quality Index scores were found to have a significant positive correlation with the prevalence of urolithiasis (OR: 1.178; 95% CI = 1.083–1.282; p < 0.001). The risk of urolithiasis was significantly increased with an elevation of the component Pittsburgh Sleep Quality Index score in sleep latency, sleep duration, habitual sleep efficiency, and daytime dysfunction.ConclusionsIt was evident that there is an association between sleep quality and prevalence of renal stones in natural population in western China regions. Poor sleep quality is related to urolithiasis. The findings of the current study hence highlighted the need for future public health guidelines to develop detailed strategies for improving sleep quality.

Quality Control Analysis of Fireproof Stone with New Seven Tools Method at PT. Loca Refractories Wira Jatim

PT. Loka Refractories Wira Jatim is a manufacturing company that produces refractory stones. In carrying out the production process, defective products are often found. In this study, an analysis of the quality control of refractory stone will be carried out using the New Seven Tools method. The purpose of this study was to determine the quality of refractory stone, the factors that cause disability and the impact. In addition, suggestions for improvements will be given to improve the quality of the refractory stone produced. The results showed that the most common types of defects were 50% in April 2021, while the types of defects that occurred the least were &gt; 1 type of defects as much as 2% in October 2020. The factors causing the formation of defective products include human errors, old machines, undeveloped work methods, and poor quality of raw materials. Improvement activities that can be carried out are improving operator performance, improving machine performance, making work methods, and tightening control of raw materials or QC.

Influence of a Deep Learning Noise Reduction on the CT Values, Image Noise and Characterization of Kidney and Ureter Stones.

Deep-learning (DL) noise reduction techniques in computed tomography (CT) are expected to reduce the image noise while maintaining the clinically relevant information in reduced dose acquisitions. This study aimed to assess the size, attenuation, and objective image quality of reno-ureteric stones denoised using DL-software in comparison to traditionally reconstructed low-dose abdominal CT-images and evaluated its clinical impact. In this institutional review-board-approved retrospective study, 45 patients with renal and/or ureteral stones were included. All patients had undergone abdominal CT between August 2019 and October 2019. CT-images were reconstructed using the following three methods: filtered back-projection, iterative reconstruction, and PixelShine (DL-software) with both sharp and soft kernels. Stone size, CT attenuation, and objective image quality (signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR)) were evaluated and compared using Bonferroni-corrected Friedman tests. Objective image quality was measured in six regions-of-interest. Stone size ranged between 4.4 × 3.1–4.4 × 3.2 mm (sharp kernel) and 5.1 × 3.8–5.6 × 4.2 mm (soft kernel). Mean attenuation ranged between 704–717 Hounsfield Units (HU) (soft kernel) and 915–1047 HU (sharp kernel). Differences in measured stone sizes were ≤1.3 mm. DL-processed images resulted in significantly higher CNR and SNR values (p < 0.001) by decreasing image noise significantly (p < 0.001). DL-software significantly improved objective image quality while maintaining both correct stone size and CT-attenuation values. Therefore, the clinical impact of stone assessment in denoised image data sets remains unchanged. Through the relevant noise suppression, the software additionally offers the potential to further reduce radiation exposure.

Assessing stone walls habitat quality – Which factors affect bryophytes and macrolichens on farmland stone walls in Ireland?

Stone walls are ubiquitous field boundaries used to restrict livestock movement or to separate property. Bryophytes and lichens are often the dominant vegetation in dry stone walls and are strongly affected by local microhabitat characteristics. Bryophytes and lichens related metrics can be used to define habitat quality of stone walls.The current study assessed how richness and cover of bryophytes and macrolichens in dry stone walls related to each other and how different environmental variables and farm management descriptors determined richness and cover of both groups in dry stone walls. Bryophytes and macrolichens were sampled in stone walls on sixteen farms across a management intensity gradient in Ireland.Bryophyte cover correlated positively and significantly with bryophyte richness and macrolichen cover and richness, and can thus be used to assess stone walls quality. Farm management intensity emerged as the variable most strongly related with species richness of bryophytes and cover of both groups. Altitude also emerged as a strong predictor of both groups’ richness and cover. This study provides a novel perspective on stone wall habitat quality and results indicate that by promoting extensive farming it is possible to increase stone walls quality.

Gemmology and Gupta Period: Context of Precious Stones Industry in Ancient India

India has always been rich in its natural resources and its products. All these rich resources offered scope for a large number of industries, handicrafts and many other professions [I]. Likewise, industrial works and other economic professions were encouraged during the Gupta period also since raw materials were abundant for industries. Gemstone is a piece of mineral crystal that in cut and polished form is used to make jewellery or other adornments. One of the most ancient Industries of India was the precious stone Industry which includes diamonds, pearls, ruby and emerald among many others. The Guptas were also skilled in craftsmanship. They got the credit for organizing the technical skill of the craftsmen under royal supervision and inducing them to be enterprising in their trade. They inherited the fine craftsmanship of the Indians from an earlier period [II]. The science of testing gems was so perfected in India in this period as to arouse the admiration of the later European travellers of the 16th century. In the Kamasutra ruparatnapariksha (testing and valuing of precious stones etc.) are included in the list of sixty-four arts [III]. The jewellers [IV] used scales and touchstones for weighing and testing the quality and quantity of stones and metals. Such a high level of culture and the enhanced standard of living of the rich were impossible without a well developed urbanization and trade network. It is a fact from the Gupta period, trade had started falling on bad days but localized economic formations started taking place. By the time of this period, the trade become luxury oriented, a fact attested by the frequency of references to such items in the Brihatsamhita and many other ancient Sanskrit literature [V].

Investigation on Milling Quality of Stone–Plastic Composite Using Response Surface Methodology

Investigation on Milling Quality of Stone–Plastic Composite Using Response Surface Methodology

Data-Driven Modeling and Prediction Analysis for Surface Roughness of Special-Shaped Stone by Robotic Grinding

This paper aims to accurately predict the surface quality of the special-shaped stone by robotic grinding and effectively guide the adjustment of process parameters to ensure stable grinding quality, applies a support vector machine model based on improved whale optimization algorithm (IWOA-SVR), so as to establish a prediction model of surface roughness of special-shaped stone and a selection method of process parameters. The proposed IWOA-SVR was used to improve the prediction accuracy of support vector machine regression model, and a prediction model of surface roughness (Ra) for stone was established. On this basis, the relationship between the output parameters (surface roughness) and inutput parameters (spindle speed, feed speed, cutting depth and cutting width)was explored to obtain more suitable process parameters. Combining the grinding experiment data of special-shaped stone, the comparison was carried out between IWOA-SVR and the SVR model optimized by the commonly used optimization algorithms (grid-search optimization algorithm (GS) and whale optimization algorithm (WOA)). Under the same sample condition, the prediction error of GS-SVR is the most large, and the average prediction error of IWOA-SVR is only 86.1% if that of WOA-SVR, the training time is shortened by 54.4%. The influence of process parameters on surface roughness obtained by IWOA-SVR can effectively guide the selection and adjustment of process parameters. It has good guiding significance for maintaining the excellent grinding quality of special-shaped stone.

Nephrite of Bazhenovskoye Chrysotile–Asbestos Deposit, Middle Urals: Localization, Mineral Composition and Color

In the Bazhenovskoye chrysotile–asbestos deposit (Middle Urals), nephrite bodies of the serpentinite type were found on the contact of after gabbro rodingites and serpentinites. The color is uniform to non-uniform, green to light green, bluish green, greyish green, and whitish. Spots, streaks, lenticules of bright bluish-green or, on the contrary, light green color are sometimes noted. The nephrite is mostly comprised of tremolite. Chromite decreases the quality of the ornamental stone, but it is replaced by chrome grossular, which gives the nephrite a brighter bluish-green color locally. Crushed grains of chromite contain increased concentrations of Zn and Mn. The quality of the nephrite is decreased by serpentine and talc, as well as by fractures due to drilling and blasting works. The specific feature of the nephrite in the Bazhenovskoye deposit is the formation of nickeline, maucherite, and uvarovite. The green color is associated with Fe2+ ions. The nephrite of the Bazhenovskoye deposit meets the requirements for an ornamental stone. The origin of this nephrite includes a combination of metasomatic and metamorphic processes.

Requirements for investigation of physical/mechanical properties of rocks and crushed stone quality in Russia

The industry of nonmetallic building materials is a priority industry that determines the current state of the national economy of Russia and the potential for its development. The requirements for the quality of crushed stone are constantly increasing. At the same time, the history of the emergence and development of these requirements has not been studied in the literature. An analysis of historical experience is necessary to identify the patterns of development of technology for the production of road crushed stone and to work out an effective way of development at the present stage. The article studies genesis of requirements for the research of the physical and mechanical properties of rocks and the quality of road crushed stone in Russia. This study is the first system-based and comprehensive study on this topic. The chronological framework of the study is limited to the beginning of the 19th century&mdash;the time of the appearance of highways in Russia, and at the turn of the 19th&ndash;20th centuries as a period of the emergence of vehicles and the development of requirements for the quality of crushed stone. The article shows that construction of highways necessitated studies into properties of rocks. Russian specialists started from the experience gained in European countries. However, Russian engineers did not copy European experience. They supplemented and developed European experience taking into account Russian realities. It was found that the main indicators of the quality of crushed stone were its strength (resistance to compressive), abrasion and impact loads, grain size, grain size distribution, cuboid shape and contamination with foreign impurities. These indicators are basic in all modern GOSTs (All-Union State Standard) and regulatory documents that regulate the quality of crushed stone. In the same period, methods of determining the quality indicators of crushed stone in laboratory conditions were proposed. The principles underlying these methods, in fact, correspond to modern methods of testing the physical and mechanical properties of rocks. The difference lies in the hardware, experimental conditions and quantitative assessment of the determined indicators.

A Field Study of Dynamic Compaction in the Construction of a Stone-Filled Embankment

Abstract Road embankments in the mountainous terrains are typically constructed using locally available stones through dynamic compaction (DC) because of the relatively low cost; however, the filling quality of large stones is difficult to control with limited research and field performance data available. This article presents the results of a field study for estimating the construction parameters including effective improvement depth, number of tampering points, and lateral influence distance for a DC of a stone-filled embankment. The pilot field-testing program consisted of roller compaction and DC. The field test data included tamping settlement and surface uplift after each hammer drop. Static and dynamic soil pressures were measured, and the former was used to correlate with compacted fill density. The field data show a strong correlation between the static soil pressure increment and compacted fill density. Based on this correlation, it was found that (1) in order for each DC point to achieve the target compacted fill density, it was necessary for tampering to be done a total of eight times; (2) the effective improvement depth was approximately 5 m; and (3) the lateral influence distance was approximately 2.5 m and, hence, a horizonal interval of 5 m was determined for the layout of tampering points in the field construction. The good in-service performance of the completed embankment and paved road suggests that the pilot field-testing program was a success in determining the construction parameters.

Detection of Limestone Quarries in Jordan Through Remote Sensing Data to Achieve Sustainable Utilization in Vernacular Architecture

All human societies seek stability and use of place and material in order to create architectural buildings. One of the most important materials that man used as a building material was natural stone, and in Jordan stone has a special architectural value, as Jordanian architects used it to form a unique architectural style, especially in the capital, Amman. But at the end of the last century and the beginning of the current century, alternative manufactured building materials appeared, and architects began using them for many reasons, including the lack of quality of natural stone and its defects, which resulted in deformation of the architectural facades. The research used remote sensing techniques to know the properties and quality of the stone. This research used the descriptive approach in studying the history of architecture in Jordan and its relationship to limestone, and relied on the analytical survey by obtaining data from satellite images, where they were analyzed and the properties of the stone in the ground were shown. This research aims to preserve the use of natural stone in construction as a building material that has characteristics in sustainability.

Ecological perspectives on technological diversity at Kanjera South

The aspects of hominin behavior responsible for Oldowan stone tool variation are the focus of much debate. There is some consensus that this variation arises from a combination of ecological and cultural factors. The diversity of raw material types and technological strategies present at Kanjera South, Kenya, provide an opportunity to examine the interacting influences of ecology and culture on Oldowan stone tool variation. Here, we combine previous analyses of raw material properties, provenance, and technology with quantitative measures of core reduction intensity and tool utilization to examine the influence of both ecological and technocultural factors on stone tool variation at Kanjera South. The results of this analysis reflect a dynamic relationship between raw material properties, provenance, and hominin mobility. Exotic raw materials are generally more resistant to edge attrition compared with those available locally, which may have incentivized their transport over long distances and more extensive reduction. Cores produced on raw materials from distant sources also exhibit more complex core reduction strategies than locally acquired materials. While this pattern is partially due to the differences in the quality of knappable stone, bifacial centripetal and multifacial core reduction strategies also arise due to the continuous transport and use of exotic raw materials. Moreover, the variation in stone tool reduction is not consistent with neutral models of stone tool transport and discard. These results demonstrate that ecological factors such as raw material provenance and physical properties have strong impacts on reduction intensity and the technological strategies used by hominins.