Journal articles: 'Radiometric complex'

1

Haug, C. J., P. Gaustad, and F. Müller. "Radiometric quantification ofMycobacterium avium complex." European Journal of Clinical Microbiology & Infectious Diseases 17, no. 6 (June 1998): 388–90. http://dx.doi.org/10.1007/bf01691566.

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Пилипенко, А. М., И. К. Сундучков, В. В. Чмиль, В. М. Чмиль, П. А. Яцык, A. M. Pylypenko, I. K. Sunduchkov, V. V. Chmil, V. M. Chmil, and P. O. Yatsyk. "Radiometric receiving complex and ways to reduce the radiometric measurements error." Технология и конструирование в электронной аппаратуре, no. 5-6 (December 2015): 14–21. http://dx.doi.org/10.15222/tkea2015.5-6.14.

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Haug, C. J., P. Gaustad, and F. Müller. "Radiometric Quantification of Mycobacterium avium Complex." European Journal of Clinical Microbiology & Infectious Diseases 17, no. 6 (August 14, 1998): 388–90. http://dx.doi.org/10.1007/s100960050091.

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Sromovsky, Lawrence A. "Radiometric errors in complex Fourier transform spectrometry." Applied Optics 42, no. 10 (April 1, 2003): 1779. http://dx.doi.org/10.1364/ao.42.001779.

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Mebinck, K., H. Middelkoop, N. van Diepen, E. R. van der Graaf, and R. J. de Meijer. "Radiometric fingerprinting of fluvial sediments in the Rhine-Meuse delta, the Netherlands – a feasibility test." Netherlands Journal of Geosciences 86, no. 3 (September 2007): 229–40. http://dx.doi.org/10.1017/s0016774600077829.

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AbstractThe deposits of the Rhine and the Meuse in the Netherlands alternate in their delta in a complex way. This paper discusses a method to distinguish the deposits of the Rhine and the Meuse based on the differences in natural radioactivity of 40K, 238U and 232Th, and the effect of the age of the deposits on the radiometrie signal. In total, six channel belts of the Rhine and the Meuse were selected for sampling with an approximate age of about 2000, 4000 and 6000 14C years B.P. Of each channel belt 5 samples of different lithology were taken: clay (C), clay leads (CL), sandy clay loam (sCL), sandy loam (sL) and sand (S). All samples were analysed on organic matter content, grain size, geochemistry and radioactivity of the radionuclides 40K, 238U and 232Th. The radioactivity of the sample is mainly influenced by the grain size of the sample. Therefore, this signal is divided in partial radioactivities for three grain size fractions – clay (<16 μm), silt (16 – 63 μm) and sand (>63 μm) – to make the radiometric fingerprint, which is independent of the grain size of the sample. These fingerprints show a difference between the Rhine and the Meuse. Additionally, the radiometric signal strongly depends on the age of the deposits. Remarkably, this trend with age is opposite in the deposits of the Rhine and the Meuse and opposite in the clay and silt fraction. Because the radiometrie differences between the samples seem more distinct than the geochemical differences, the radiometric fingerprints are more suitable to distinguish the deposits of the Rhine and the Meuse. A method is presented to derive the contribution of the Rhine and the Meuse in a deposit of unknown origin, assuming that the radiometric fingerprints found are consistent and valid for the Rhine-Meuse delta. To distinguish the deposits of the Rhine and the Meuse, both the grain size composition and the age of the deposits have to be known.

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Shirazy, Adel, Ardeshir Hezarkhani, Timofey Timkin, and Aref Shirazi. "Investigation of Magneto-/Radio-Metric Behavior in Order to Identify an Estimator Model Using K-Means Clustering and Artificial Neural Network (ANN) (Iron Ore Deposit, Yazd, IRAN)." Minerals 11, no. 12 (November 23, 2021): 1304. http://dx.doi.org/10.3390/min11121304.

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The study area is located near Toot village in the Yazd province of Iran, which is considered in terms of its iron mineralization potential. In this area, due to radioactivity, radiometric surveys were performed in a part of the area where magnetometric studies have also been performed. According to geological studies, the presence of magnetic anomalies can have a complex relationship with the intensity of radioactivity of radioactive elements. Using the K-means clustering method, the centers of the clusters were calculated with and without considering the coordinates of radiometric points. Finally, the behavior of the two variables of magnetic field strength and radioactivity of radioactive elements relative to each other was studied, and a mathematical relationship was presented to analyze the behavior of these two variables relative to each other. On the other hand, the increasing and then decreasing behavior of the intensity of the Earth’s magnetic field relative to the intensity of radioactivity of radioactive elements shows that it is possible to generalize the results of magnetometric surveys to radiometry without radiometric re-sampling in this region and neighboring areas. For this purpose, using the general regression neural network and backpropagation neural network (BPNN) methods, radiometric data were estimated with very good accuracy. The general regression neural network (GRNN) method, with more precision in estimation, was used as a model for estimating the radiation intensity of radioactive elements in other neighboring areas.

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Hooker, Stanford B., Henry F. Houskeeper, Raphael M. Kudela, Atsushi Matsuoka, Koji Suzuki, and Tomonori Isada. "Spectral modes of radiometric measurements in optically complex waters." Continental Shelf Research 219 (April 2021): 104357. http://dx.doi.org/10.1016/j.csr.2021.104357.

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Azaryan, Volodymyr. "The Methodology of Use of the Mobile Crushing-and-Sorting Radiometric Complex in the Iron-Ore Pit." Solid State Phenomena 277 (June 2018): 90–99. http://dx.doi.org/10.4028/www.scientific.net/ssp.277.90.

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This paper justifies the use of the mobile crushing-and-sorting radiometric complexes (MCSRC) under conditions of iron-ore pits in order to increase the ore quality produced in the mine faces of the «ore-rock» contact zone and stabilize the content of the useful component in the general ore-flow. The patterns, which are used as a fundamental base of the radiometric sorting process, are given. The functional scheme of MCSRC is considered, the algorithm of operation is developed, and the main technological tasks of the complex are determined. The technological scheme of the face sloping using MCSRC and formation of the all-pit ore-flow is developed. The expected indicators from use of the mobile crushing-and-sorting radiometric complex in the form of the technological, economical, power-saving and ecological effect were considered.

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Ruzhentsev, Nikolay, Simeon Zhyla, Vladimir Pavlikov, Gleb Cherepnin, Eduard Tserne, Anatoliy Popov, and Anton Sobkolov. "BLOCK DIAGRAM OF A MULTI-FREQUENCY RADIOMETRIC COMPLEX FOR UAV DETECTION IN DIFFERENT METEOROLOGICAL CONDITIONS." Information and Telecommunication Sciences, no. 2 (December 21, 2021): 50–57. http://dx.doi.org/10.20535/2411-2976.22021.50-57.

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Background. Technologies for the production of unmanned aerial vehicles (UAVs) of various classes are rapidly developing in Ukraine and the world. Small in terms of weight and dimensions and almost invisible for most information and measurement systems, UAVs began to be used in various industries - from the national economy to multimedia and advertising. Together with their useful application, new dangers and incidents have appeared - a collision of UAVs with people, structures, cultural monuments, the transportation of criminal goods, terrorist acts, flights over prohibited areas and within airports. UAV detection and control of their movement in populated areas and near critical objects are becoming one of the most important tasks of air traffic control services. The existing systems of the optical, acoustic and radar ranges cannot effectively perform such tasks in difficult meteorological conditions. As an addition to the already developed detection systems, it is proposed to use radiometric systems that register the UAV's own radio-thermal radiation. The authors have developed the theoretical foundations for the construction of multifrequency complexes necessary for the specification of their structural schemes. Objective. The purpose of the paper is development of a scheme for a multi-frequency radiometric complex for detecting UAVs in different meteorological conditions based on optimal algorithms. Methods. Analysis of the experience in the development of radiometric systems and methods for dealing with fluctuations in the gain of receivers, optimal operations for processing signals of intrinsic radio-thermal radiation, investigations of the probabilistic characteristics of detection and analysis of the domestic market of microwave technology developers will make it possible to develop a scheme of a multifrequency radiometric complex that will perform reliable measurements in various meteorological conditions. Results. A block diagram of a four-frequency radiometric complex is proposed, which can be implemented in practice and is capable of performing reliable measurements in various meteorological conditions. The frequencies 10 GHz, 20 GHz, 35 GHz, and 94 GHz were chosen as the resonant frequencies for tuning the radiometric receivers. For a given design and characteristics of receivers, the probabilities of detecting a UAV were calculated depending on the range of its flight. Conclusions. From the results of the analysis of the existing achievements in the development of radiometric systems in Ukraine and the elemental base of microwave components available on the market, it follows that the Ku and K bands have the worst characteristics of spatial resolution, but are all-weather. The Ka and W bands are highly sensitive to radio-thermal radiation against the background of a clear sky, but are completely "blind" in a cloudy atmosphere and in rain. The results of calculating the detection ranges with a probability of 0.9 lie in the range from 1 to 3 km, depending on the condition of the atmosphere. These results coincide with the known detection ranges of optical, acoustic and radar systems, but the selected parameters of the receivers do not correspond to potential world achievements and can be improved.

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Bai, Yang, Ping Tang, and Changmiao Hu. "KERNEL MAD ALGORITHM FOR RELATIVE RADIOMETRIC NORMALIZATION." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-1 (June 1, 2016): 49–53. http://dx.doi.org/10.5194/isprsannals-iii-1-49-2016.

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The multivariate alteration detection (MAD) algorithm is commonly used in relative radiometric normalization. This algorithm is based on linear canonical correlation analysis (CCA) which can analyze only linear relationships among bands. Therefore, we first introduce a new version of MAD in this study based on the established method known as kernel canonical correlation analysis (KCCA). The proposed method effectively extracts the non-linear and complex relationships among variables. We then conduct relative radiometric normalization experiments on both the linear CCA and KCCA version of the MAD algorithm with the use of Landsat-8 data of Beijing, China, and Gaofen-1(GF-1) data derived from South China. Finally, we analyze the difference between the two methods. Results show that the KCCA-based MAD can be satisfactorily applied to relative radiometric normalization, this algorithm can well describe the nonlinear relationship between multi-temporal images. This work is the first attempt to apply a KCCA-based MAD algorithm to relative radiometric normalization.

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Bai, Yang, Ping Tang, and Changmiao Hu. "KERNEL MAD ALGORITHM FOR RELATIVE RADIOMETRIC NORMALIZATION." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-1 (June 1, 2016): 49–53. http://dx.doi.org/10.5194/isprs-annals-iii-1-49-2016.

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The multivariate alteration detection (MAD) algorithm is commonly used in relative radiometric normalization. This algorithm is based on linear canonical correlation analysis (CCA) which can analyze only linear relationships among bands. Therefore, we first introduce a new version of MAD in this study based on the established method known as kernel canonical correlation analysis (KCCA). The proposed method effectively extracts the non-linear and complex relationships among variables. We then conduct relative radiometric normalization experiments on both the linear CCA and KCCA version of the MAD algorithm with the use of Landsat-8 data of Beijing, China, and Gaofen-1(GF-1) data derived from South China. Finally, we analyze the difference between the two methods. Results show that the KCCA-based MAD can be satisfactorily applied to relative radiometric normalization, this algorithm can well describe the nonlinear relationship between multi-temporal images. This work is the first attempt to apply a KCCA-based MAD algorithm to relative radiometric normalization.

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12

Wang, Qi, and Guang Feng Zhang. "MMW Radiometric Image Feature Extraction for Security Inspection." Applied Mechanics and Materials 236-237 (November 2012): 999–1003. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.999.

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Millimeter-wave (MMW) radiometric imaging system is widely used in the field of military and civil affairs. It can be used to detect concealed objects hidden under clothing. Based on MMW radiation imaging method and morphology theory, we presented a complex morphology filter to do the image pretreatment. Then used the Canny operator to extract features from concealed objects. The results show that the morphology algorithm can improve the quality of radiometric images. Meanwhile, Canny algorithm can detect the edges of object well.

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13

Руженцев, Микола Вікторович, Семен Сергійович Жила, Володимир Володимирович Павліков, Гліб Сергійович Черепнін, Анатолій Владиславович Попов, Володимир Віталійович Кошарський, Едуард Олексійович Церне, and Дмитро Сергійович Власенко. "Теоретичні основи побудови багаточастотних радіометричних комплексів для виявлення БпЛА на тлі атмосферного випромінювання." Aerospace technic and technology, no. 6 (November 29, 2021): 74–82. http://dx.doi.org/10.32620/aktt.2021.6.08.

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Due to the impossibility of hiding the unmanned aerial vehicles (UAV) own radiothermal radiation or reducing its contrast against the background of atmospheric radiation, it is advisable to use highly sensitive radiometric receivers to solve the detection problem. The optimal method for complexing the results of measurements in multichannel radiometric receivers and identifying different types and classes of UAV against the sky in X, Ka, and W wave ranges under different meteorological conditions has been developed. end-to-end optimization of methods and algorithms will reveal the theoretical foundations of the construction of radiometric systems, ranging from the field of registration of electromagnetic fields to the final stages. In cloudless and clear weather, radiometric measurements in the W range will allow to obtain high-precision estimates of the spatial position of UAVs, in the X range of reliable observations in rain, snow, fog. The use of the Ka-band receiver in the radiometric complex will allow to realize the best sensitivity due to the technical achievements of domestic production in the creation of broadband radiometric receivers in this waveband. Studies of the main parameters of UAV detection have been conducted, namely, the probability of erroneous detection alarm and the probability of correct detection. The obtained theoretical results allow to determine signal processing algorithms and optimal structures of radiometric receivers, to analyze the maximum measurement error and to develop recommendations for experiments. Having received a database of radiometric contrasts, it is possible to further implement technical solutions to increase the capabilities of airspace monitoring for UAV detection. Recommendations are given for the practical choice of the UAV detection threshold to ensure the probability of correct detection is not worse than 0.9 for different angles of observation, atmospheric state, size and material of manufacture.

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Danilychev, M. V., D. M. Ermakov, B. G. Kutuza, and V. P. Savorskiy. "Multibeam systems as a part of the on-board radiometric complex." Физические основы приборостроения 7, no. 1 (March 15, 2018): 37–45. http://dx.doi.org/10.25210/jfop-1801-037045.

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Erofeev, P. N., A. A. Ivanov, O. Sh Kuz’mina, M. A. Samoilova, D. E. Fertman, S. B. Chebyshov, I. I. Cherkashin, and S. V. Shevtsov. "Radiometric Complex for Recording the Volumetric Activity of Radioactive Inert Gases." Atomic Energy 125, no. 1 (November 2018): 55–60. http://dx.doi.org/10.1007/s10512-018-0441-2.

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Demchenko, N. F., M. M. Salikov, V. I. Shipilov, N. N. Moiseev, I. A. Kharitonov, and Sh V. Yablokov. "Special Radiometric Complex with Calorimeter for Determining the Radioactivity of Radionuclides." Measurement Techniques 60, no. 5 (August 2017): 510–14. http://dx.doi.org/10.1007/s11018-017-1226-z.

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Hoffner, Sven E. "Improved detection of Mycobacterium avium complex with the bactec radiometric system." Diagnostic Microbiology and Infectious Disease 10, no. 1 (May 1988): 1–6. http://dx.doi.org/10.1016/0732-8893(88)90121-6.

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Cao, Hongtao, Xingfa Gu, Xiangqin Wei, Tao Yu, and Haifeng Zhang. "Lookup Table Approach for Radiometric Calibration of Miniaturized Multispectral Camera Mounted on an Unmanned Aerial Vehicle." Remote Sensing 12, no. 24 (December 8, 2020): 4012. http://dx.doi.org/10.3390/rs12244012.

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Over recent years, miniaturized multispectral cameras mounted on an unmanned aerial vehicle (UAV) have been widely used in remote sensing. Most of these cameras are integrated with low-cost, image-frame complementary metal-oxide semiconductor (CMOS) sensors. Compared to the typical charged coupled device (CCD) sensors or linear array sensors, consumer-grade CMOS sensors have the disadvantages of low responsivity, higher noise, and non-uniformity of pixels, which make it difficult to accurately detect optical radiation. Therefore, comprehensive radiometric calibration is crucial for quantitative remote sensing and comparison of temporal data using such sensors. In this study, we examine three procedures of radiometric calibration: relative radiometric calibration, normalization, and absolute radiometric calibration. The complex features of dark current noise, vignetting effect, and non-uniformity of detector response are analyzed. Further, appropriate procedures are used to derive the lookup table (LUT) of correction factors for these features. Subsequently, an absolute calibration coefficient based on an empirical model is used to convert the digital number (DN) of images to radiance unit. Due to the radiometric calibration, the DNs of targets observed in the image are more consistent than before calibration. Compared to the method provided by the manufacturer of the sensor, LUTs facilitate much better radiometric calibration. The root mean square error (RMSE) of measured reflectance in each band (475, 560, 668, 717, and 840 nm) are 2.30%, 2.87%, 3.66%, 3.98%, and 4.70% respectively.

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Finch, Adrian A., Joakim Mansfeld, and Tom Andersen. "U-Pb radiometric age of Nunarsuit pegmatite, Greenland: constraints on the timing of Gardar magmatism." Bulletin of the Geological Society of Denmark 48 (December 31, 2001): 1–7. http://dx.doi.org/10.37570/bgsd-2001-48-01.

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A precise U-Pb radiometric age of 1171±5 Ma has been obtained from zircons from a pegmatite in the Nunarsuit (previously spelt Nunarssuit) complex, Gardar Province, South Greenland. This age is slightly older than a corresponding Rb-Sr isochron determination. Since Nunarsuit is believed to be among the youngest Gardar centres, this radiometric age date more closely delimits the end of magmatism in the Gardar rift province. A comparison of our data with other published isotopic work may suggest that Gardar magmatism was a continuous rather than a punctuated process.

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Bukata, Robert P., Dmitry V. Pozdnyakov, John H. Jerome, and Fred J. Tanis. "Validation of a radiometric color model applicable to optically complex water bodies." Remote Sensing of Environment 77, no. 2 (August 2001): 165–72. http://dx.doi.org/10.1016/s0034-4257(01)00203-6.

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Ryskin, V. G., A. A. Shvetsov, M. Yu Kulikov, M. V. Belikovich, O. S. Bol’shakov, A. A. Krasil’nikov, L. M. Kukin, I. V. Lesnov, N. K. Skalyga, and A. M. Feigin. "Microwave Radiometric Complex for Studying the Thermal Structure of the Earth’s Atmosphere." Radiophysics and Quantum Electronics 59, no. 8-9 (January 2017): 734–40. http://dx.doi.org/10.1007/s11141-017-9742-x.

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Gyliené, O., R. Tarozaité, N. Čiukšiené, and J. Butkevičius. "Radiometric investigation of electrodeless copper plating from EDTA-complex solutions, containing glycine." Journal of Radioanalytical and Nuclear Chemistry 240, no. 1 (April 1999): 371–74. http://dx.doi.org/10.1007/bf02349182.

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Tu, Yu-Hsuan, Stuart Phinn, Kasper Johansen, and Andrew Robson. "Assessing Radiometric Correction Approaches for Multi-Spectral UAS Imagery for Horticultural Applications." Remote Sensing 10, no. 11 (October 25, 2018): 1684. http://dx.doi.org/10.3390/rs10111684.

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Multi-spectral imagery captured from unmanned aerial systems (UAS) is becoming increasingly popular for the improved monitoring and managing of various horticultural crops. However, for UAS-based data to be used as an industry standard for assessing tree structure and condition as well as production parameters, it is imperative that the appropriate data collection and pre-processing protocols are established to enable multi-temporal comparison. There are several UAS-based radiometric correction methods commonly used for precision agricultural purposes. However, their relative accuracies have not been assessed for data acquired in complex horticultural environments. This study assessed the variations in estimated surface reflectance values of different radiometric corrections applied to multi-spectral UAS imagery acquired in both avocado and banana orchards. We found that inaccurate calibration panel measurements, inaccurate signal-to-reflectance conversion, and high variation in geometry between illumination, surface, and sensor viewing produced significant radiometric variations in at-surface reflectance estimates. Potential solutions to address these limitations included appropriate panel deployment, site-specific sensor calibration, and appropriate bidirectional reflectance distribution function (BRDF) correction. Future UAS-based horticultural crop monitoring can benefit from the proposed solutions to radiometric corrections to ensure they are using comparable image-based maps of multi-temporal biophysical properties.

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Chékaraou, Mahamane M. S., and Moussa Konaté. "Permian Ages of “Younger Granites” from Mounio Province (Gouré area, Southeastern Niger)." European Journal of Environment and Earth Sciences 2, no. 6 (December 8, 2021): 27–35. http://dx.doi.org/10.24018/ejgeo.2021.2.6.220.

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African formations intruded by the “Younger Granites” ring complex. In the study area, the “Younger Granites” are represented by volcanic to acid plutonic rocks with hyperalkaline trends (pyroclastic rocks, rhyolites, microgranites, granites, syenites), forming in the North, a circular structure called Gouré ring complex. Preliminary geochronological datings of the Mounio granites have yielded Carboniferous ages. However, recent investigations carried out in this province have identified structures similar to Pan-African deformation structures, such as folds and several generations of schistosity/foliation. Analysis of the relationship between deformation and magmatism has removed any ambiguity regarding the relative age of the deformation. This study focuses on the radiometric dating of the “Younger Granites” of Gouré area, in order to update the geochronological data. Thus, three samples (pyroclastitic rock, rhyolite, microgranite) were dated by the K-Ar method on total rock using a mass spectrometertype MI 1201 IG. Radiometric dating results assign a Lower Permian age (293-287 Ma) to the “Younger Granites” Ring Complex of the Mounio Province in Niger, classically considered to be Carboniferous in age.

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Lewandowska, Anna, Michał Banaś, and Karolina Zygoń. "K-Ar Dating of Amphiboles from Andesite of Complex Dyke in Dubie (Southern Poland)." Geochronometria 27, no. -1 (July 1, 2007): 11–15. http://dx.doi.org/10.2478/v10003-007-0016-z.

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K-Ar Dating of Amphiboles from Andesite of Complex Dyke in Dubie (Southern Poland) This study presents the results of radiometric K-Ar measurements on separated amphiboles from the andesite of the Dubie complex dyke. The data obtained cover the period of (291.3 ± 6.4) Ma, which corresponds to Carboniferous-Permian transition. The age is contemporaneous to the rhyodacitic and basaltoid volcanism of the Kraków region.

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Croudace, Ian W., Ben C. Russell, and Phil W. Warwick. "Plasma source mass spectrometry for radioactive waste characterisation in support of nuclear decommissioning: a review." Journal of Analytical Atomic Spectrometry 32, no. 3 (2017): 494–526. http://dx.doi.org/10.1039/c6ja00334f.

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The efficient characterization of nuclear waste materials represents a significant challenge during nuclear site decommissioning, with a range of radionuclides requiring measurement in varied and often complex sample matrices. ICP-MS is increasingly a practicable alternative to radiometric methods for medium to long-lived radionuclides.

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Wang, S. X., and L. Tay. "Evaluation of Three Nucleic Acid Amplification Methods for Direct Detection of Mycobacterium tuberculosis Complex in Respiratory Specimens." Journal of Clinical Microbiology 37, no. 6 (1999): 1932–34. http://dx.doi.org/10.1128/jcm.37.6.1932-1934.1999.

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Two hundred thirty respiratory specimens from 230 patients were analyzed by using COBAS AMPLICOR PCR, Amplified Mycobacterium tuberculosis Direct Test, and ligase chain reaction methods. Results were compared with those of smear microscopy and radiometric culture (Bactec) methods. No significant differences were observed among the results of the three methods, which are acceptable for direct detection of M. tuberculosis complex in respiratory specimens.

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Silva, Adolfo, Tiago Duque, and Felipe Alves. "INTERPRETATION OF RADIOMETRIC RATIOS AND MAGNETIC ANOMALIES FROM MORRO FEIO ULTRAMAFIC COMPLEX, CENTRAL-WESTERN BRAZIL." Brazilian Journal of Geophysics 37, no. 3 (September 1, 2019): 309. http://dx.doi.org/10.22564/rbgf.v37i3.2010.

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ABSTRACTThis study was performed to identify magnetic structures in depth and radiometric responses within and around Morro Feio Ultramafic Complex (MFUC) from the airborne geophysical (gamma–ray spectrometry and magnetic) data. Using processing techniques and profiles analysis, we have found eight gamma–ray spectrometry signatures and twenty–seven magnetic anomalies. The radiometric signatures are basically characterized by a K and eU relative enrichment in detriment eTh, with two of these signatures also characterized by K relative enrichment in detriment eU. Based on published works, we have interpreted the radiometric responses may be from serpentinite and possible areas with hydrothermal alterations. Regarding the magnetic anomalies, we concluded that the shallowest may be the magnetic responses of dikes, contact zones and other structures, while the deepest have sources with more complex geometries and are concentrated in central–western of MFUC, where the participation of Pt is larger. In this aspect, our results reinforce the arguments favorable to existence of Pt, Cr and Ni primary sources in depth.Keywords: mineral research, airborne geophysical, serpentinites, hydrothermal alteration.RESUMOEste estudo foi realizado com o objetivo de identificar estruturas magnéticas em profundidade e respostas radiométricas dentro e no entorno do Complexo Ultramáfico de Morro Feio (CUMF) a partir de dados aerogeofísicos (gamaespectrometria e magnetometria aérea). Utilizando técnicas de processamento e análise de perfis, encontramos oito assinaturas gamaespectrométrica e vinte e sete anomalias magnéticas. As assinaturas radiométricas caracterizam–se basicamente por um enriquecimento relativo de K e eU em detrimento eTh, com duas dessas assinaturas também sendo caracterizadas pelo enriquecimento relativo de K em detrimento eU. Com base em trabalhos publicados, interpretamos que as respostas radiométricas podem ser em virtude do serpentinito e possíveis áreas com alterações hidrotermais. Com relação às anomalias magnéticas, concluímos que as mais rasas podem ser as respostas magnéticas de diques, zonas de contato e outras estruturas, enquanto que as mais profundas possuem fontes com geometrias mais complexas e se concentram no centro–oeste do CUMF, onde a participação de Pt é maior. Neste aspecto, nossos resultados reforçam os argumentos favoráveis a existência de fontes primárias de Pt, Cr e Ni em profundidade.Palavras-chave: pesquisa mineral, aerogeofísica, serpentinitos, alteração hidrotermal.

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Pavlikov, V. V., N. V. Ruzhentsev, A. D. Sobkolov, D. S. Salnikov, and A. I. Tsopa. "GROUND-BASED RADIOMETRIC COMPLEX OF MILLIMETER WAVE BAND FOR METEOROLOGY AND TELECOMMUNICATIONS APPLICATIONS." Telecommunications and Radio Engineering 76, no. 16 (2018): 1477–88. http://dx.doi.org/10.1615/telecomradeng.v76.i16.70.

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Sterlyadkin, V. V. "Radiometric microwave field measurements of the complex dielectric constant of the water surface." Advances in Space Research 62, no. 11 (December 2018): 3162–69. http://dx.doi.org/10.1016/j.asr.2018.08.040.

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Imai, N. N., E. A. S. Moriya, E. Honkavaara, G. T. Miyoshi, M. V. A. de Moraes, A. M. G. Tommaselli, and R. Näsi. "ANALYSIS OF THE RADIOMETRIC RESPONSE OF ORANGE TREE CROWN IN HYPERSPECTRAL UAV IMAGES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W3 (October 19, 2017): 73–79. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w3-73-2017.

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High spatial resolution remote sensing images acquired by drones are highly relevant data source in many applications. However, strong variations of radiometric values are difficult to correct in hyperspectral images. Honkavaara et al. (2013) presented a radiometric block adjustment method in which hyperspectral images taken from remotely piloted aerial systems – RPAS were processed both geometrically and radiometrically to produce a georeferenced mosaic in which the standard Reflectance Factor for the nadir is represented. The plants crowns in permanent cultivation show complex variations since the density of shadows and the irradiance of the surface vary due to the geometry of illumination and the geometry of the arrangement of branches and leaves. An evaluation of the radiometric quality of the mosaic of an orange plantation produced using images captured by a hyperspectral imager based on a tunable Fabry-Pérot interferometer and applying the radiometric block adjustment method, was performed. A high-resolution UAV based hyperspectral survey was carried out in an orange-producing farm located in Santa Cruz do Rio Pardo, state of São Paulo, Brazil. A set of 25 narrow spectral bands with 2.5&thinsp;cm of GSD images were acquired. Trend analysis was applied to the values of a sample of transects extracted from plants appearing in the mosaic. The results of these trend analysis on the pixels distributed along transects on orange tree crown showed the reflectance factor presented a slightly trend, but the coefficients of the polynomials are very small, so the quality of mosaic is good enough for many applications.

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O., Ademila, Akingboye A. S., and Ojamomi A. I. "Radiometric survey in geological mapping of basement complex area of parts of Southwestern Nigeria." VIETNAM JOURNAL OF EARTH SCIENCES 40, no. 3 (June 4, 2018): 288–98. http://dx.doi.org/10.15625/0866-7187/40/3/12619.

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Radiometric methods were used to investigate the radioactive properties of rocks in parts of southwestern Nigeria with a view to interpreting the geological structure and abundance of natural radioactive elements in the main type rocks. The airborne radiometric dataset of Ikole Sheet and ground radiometric data recorded from eight traverses in Akoko axis of the study area were processed. Results presented as maps and profiles displayed variations of high and low radioactive concentrations across the area. These maps showed moderate to very high concentrations and very low to low concentrations of the radioelements; uranium (4.5-13.0 ppm); (LLD-low limit of detection -3.0 ppm), Th (25.0-70.0 ppm); (8.5-16.0 ppm) and K (2.0-4.0 %); but the most often observed values are in the range 2.5-7.0 ppm, 22.0-30.0 ppm and 3.0-4.0% for U, Th, and K respectively. High concentrations imply that the rocks are crystalline, undeformed and are rich in feldspar and U-Th bearing minerals. While low radioactivity is attributed to varying geologic framework compositions; weathered materials or fluids formed as a result of intense metamorphism. The radiometric datasets proved valuable in delineating different rock types and serve as a complementary tool in identifying geochemical zoning of rocks in the area.ReferencesAjibade A.C. and Fitches W.R., 1988. The Nigerian Precambrian and the Pan-African Orogeny, Precambrian Geology of Nigeria, 45-53.Ajibade A.C., Woakes M. and Rahaman M.A., 1987.Proterozoic crustal development in Pan-African regime of Nigeria: In A. Croner (ed.) Proterozoic Lithospheric Evolution Geodynamics, 17, 259-231.Appleton J.D., Miles J.C.H., Green B.M.R, Larmour R., 2008. Pilot study of the application of Tellus airborne radiometric and soil geochemical data for radon mapping. Journal of Environmental Radioactivity, 99, 1687-1697.Arisekola T.M. and Ajenipa R.A., 2013. Geophysical data results preliminary application to uranium and thorium exploration. IAEA-CYTED-UNECE Workshop on UNFC-2009 at Santiago, Chile 9-12, July, 12.Bayowa O.G., Olorunfemi O.M., Akinluyi O.F. and Ademilua O.L., 2014.A Preliminary Approach to Groundwater Potential Appraisal of Ekiti State, Southwestern Nigeria. International Journal of Science and Technology (IJST), 4(3), 48-58.Bierwirth P.N., 1997. The use of airborne gamma-emission data for detecting soil properties.Proceedings of the Third International Airborne Remote Sensing Conference and Exhibition.Copenhagen, Denmark.Grasty R.L. and Multala J., 1991. A correlation technique for separating natural and man-made airborne gamma-ray spectra. In: Current Research, Part D, Geological Survey of Canada, 111-116.Grasty R.L., Minty B.R.S., 1995a. A guide to the technical specifications for airborne gamma ray surveys. Australian Geological Survey Organization, Record.Grasty R.L., Minty B.R.S., 1995b. The standardization of airborne gamma-ray surveys in Australia. Exploration Geophysics, 26, 276-283.IAEA, 1991. Airborne gamma ray spectrometer surveying, International Atomic Energy Agency, Technical Report Series, 323.IAEA, 2007.International Atomic Energy Agency. Safety Glossary, Terminology used in Nuclear Safety and Radiation Protection-2007 Edition.Jones H.A. and Hockey, 1964.The Geology of part of’ Southwestern Nigeria.Geological Survey, Nigeria bulletin, 31.Kearey P., Brooks M. and Hill I., 2002. An Introduction to Geophysical Exploration.3rd ed. Oxford: Blackwell Science, 262.Milsom J., 2003. Field Geophysics: The geological field guide series, John Milsom University College, London. Published by John Wiley and Sons Ltd. Third edition, 51-70.MontajTM Tutorial, 2004. Two - Dimensional frequency domain processing of potential field data.Nigeria Geological Survey Agency (NGSA), 2009. Geological map of Nigeria prepared by Nigeria Geological Survey Agency, 31, ShetimaMangono Crescent Utako District, Garki, Abuja, Nigeria.Omosanya K.O., Ariyo S.O., Kaigama U., Mosuro G.O., and Laniyan T.A., 2015. An outcrop evidence for polycyclic orogenies in the basement complex of Southwestern Nigeria. Journal of Geography and Geology, 7(3), 24-34.Oyawoye, M.O., 1972. The Basement Complex of Nigeria.In African Geology. T.F.J. Dessauvagie and A.J. Whiteman (Eds) Ibadan University Press, 67-99.Oyinloye A.O., 2011. Geology and Geotectonic Setting of the Basement Complex Rocks in Southwestern Nigeria: Implications on Provenance and Evolution. Earth and Environmental Sciences, 98-117. ISBN: 978-953-307-468-9.Rahaman M.A., 1981. Recent Advances in the Study of the Basement Complex of Nigeria.First Symposium on the Precambrian Geology of Nigeria, Summary.Rahaman M.A., Emofureta W.O. and Vachette M., 1983. The potassic-grades of the Igbeti area: Further evaluation of the polycyclic evolution of the Pan-African Belt in South-western Nigeria. Precambrian Resources, 22, 75-92.Woakes M., Rahaman M.A., Ajibade A.C., 1987. Some Metallogenetic Features of the Nigerian Basement. Journal of African Earth Sciences, 6(5), 655-664.

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Saunders, Joe W., and Thurman Allen. "Hedgepeth Mounds, an Archaic Mound Complex in North-Central Louisiana." American Antiquity 59, no. 3 (July 1994): 471–89. http://dx.doi.org/10.2307/282460.

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In 1991, test excavations were conducted at Hedgepeth Mounds (16L17), a two-mound complex in Lincoln Parish, Louisiana. Radiometric, archaeological, pedological, and geomorphological data suggest that the site dates to the Archaic period (6000-1500 B.C.). Charcoal from a hearth beneath Mound A dates to cal 2888 ± 100 B.C. A soil sample from the submound surface dates to cal 4930 ± 117 B.C. Two Archaic projectile points are among the artifacts from the submound surface. Diagnostic soil horizons in Mound A fill suggest the mound is of great antiquity. Soil cores from areas adjacent to Mound A have demonstrated that the living surface of the site is covered with approximately 1 m of alluvium, and that the alluvial mantle contains diagnostic soil horizons indicative of long-term weathering.

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Pashinov, E. V. "Space experiment "Convergence": retrieving of atmospheric water vapor profile using of artificial neural networks." Исследования Земли из Космоса, no. 6 (December 21, 2019): 13–25. http://dx.doi.org/10.31857/s0205-96142019613-25.

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The paper is carried out to the investigation of the possibility of retrieving absolute humidity profile of the atmosphere using an artificial neural network based on the modeling of radiometric data of the passive microwave complex MIRS, which is part of the scientific equipment of the space experiment "Convergence". The main approaches to the construction of artificial neural networks are considered. The process of modeling MIRSs radiometric data are described. Selection of optimal characteristics of the neural network is carried out. Necessity of the information about atmospheric temperature profile for the best accuracy in solving the inverse problem are shown. The advantages of using differential channels in the 22 GHz absorption band for the humidity profile retrieving are proved. The expected errors of the atmospheric humidity profile retrieving during the Convergence experiment at altitudes from 0 to 10 km are given.

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Mohammed, Saleem I. "Geology and Radiometric Survey of Ghumchi (Michika) Part of Hawal Massif NortheasternNigerian Basement Complex." IOSR Journal of Applied Geology and Geophysics 5, no. 2 (March 2017): 06–16. http://dx.doi.org/10.9790/0990-0502010616.

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Robin, Claude, Pablo Samaniego, Jean-Luc Le Pennec, Michel Fornari, Patricia Mothes, and Johannes van der Plicht. "New radiometric and petrological constraints on the evolution of the Pichincha volcanic complex (Ecuador)." Bulletin of Volcanology 72, no. 9 (July 18, 2010): 1109–29. http://dx.doi.org/10.1007/s00445-010-0389-0.

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Mohebian, M., and R. Pourimani. "Radiometric properties of virgin and cultivated soil around the Shazand Refinery Complex in Iran." International Journal of Radiation Research 18, no. 4 (October 1, 2020): 723–32. http://dx.doi.org/10.52547/ijrr.18.4.723.

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Okhrimenko, Maxim, Craig Coburn, and Chris Hopkinson. "Multi-Spectral Lidar: Radiometric Calibration, Canopy Spectral Reflectance, and Vegetation Vertical SVI Profiles." Remote Sensing 11, no. 13 (June 30, 2019): 1556. http://dx.doi.org/10.3390/rs11131556.

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Multi-spectral (ms) airborne lidar data are enriched relative to traditional lidar due to the multiple channels of intensity digital numbers (DNs), which offer the potential for active Spectral Vegetation Indices (SVIs), enhanced classification, and change monitoring. However, in case of SVIs, indices should be calculated from spectral reflectance values derived from intensity DNs after calibration. In this paper, radiometric calibration of multi-spectral airborne lidar data is presented. A novel low-cost diffuse reflectance coating was adopted for creating radiometric targets. Comparability of spectral reflectance values derived from ms lidar data for coniferous stand (2.5% for 532 nm, 17.6% for 1064 nm, and 8.4% for 1550 nm) to available spectral libraries is shown. Active vertical profiles of SVIs were constructed and compared to modeled results available in the literature. The potential for a new landscape-level active 3D SVI voxel approach is demonstrated. Results of a field experiment with complex radiometric targets for estimating losses in detected lidar signals are described. Finally, an approach for estimating spectral reflectance values from lidar split returns is analyzed and the results show similarity of estimated values of spectral reflectance derived from split returns to spectral reflectance values obtained from single returns (p > 0.05 for paired test).

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Antoine, David, André Morel, Edouard Leymarie, Amel Houyou, Bernard Gentili, Stéphane Victori, Jean-Pierre Buis, et al. "Underwater Radiance Distributions Measured with Miniaturized Multispectral Radiance Cameras." Journal of Atmospheric and Oceanic Technology 30, no. 1 (January 1, 2013): 74–95. http://dx.doi.org/10.1175/jtech-d-11-00215.1.

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Abstract Miniaturized radiance cameras measuring underwater multispectral radiances in all directions at high-radiometric accuracy (CE600) are presented. The camera design is described, as well as the main steps of its optical and radiometric characterization and calibration. The results show the excellent optical quality of the specifically designed fish-eye objective. They also show the low noise and excellent linearity of the complementary metal oxide semiconductor (CMOS) detector array that is used. Initial results obtained in various oceanic environments demonstrate the potential of this instrument to provide new measurements of the underwater radiance distribution from the sea surface to dimly lit layers at depth. Excellent agreement is obtained between nadir radiances measured with the camera and commercial radiometers. Comparison of the upwelling radiance distributions measured with the CE600 and those obtained with another radiance camera also shows a very close agreement. The CE600 measurements allow all apparent optical properties (AOPs) to be determined from integration of the radiance distributions and inherent optical properties (IOPs) to be determined from inversion of the AOPs. This possibility represents a significant advance for marine optics by tying all optical properties to the radiometric standard and avoiding the deployment of complex instrument packages to collect AOPs and IOPs simultaneously (except when it comes to partitioning IOPs into their component parts).

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Tortoli, Enrico, Paola Cichero, M. Gabriella Chirillo, M. Rita Gismondo, Letizia Bono, Giampietro Gesu, M. Tullia Simonetti, Gisella Volpe, Giampietro Nardi, and Piero Marone. "Multicenter Comparison of ESP Culture System II with BACTEC 460TB and with Lowenstein-Jensen Medium for Recovery of Mycobacteria from Different Clinical Specimens, Including Blood." Journal of Clinical Microbiology 36, no. 5 (1998): 1378–81. http://dx.doi.org/10.1128/jcm.36.5.1378-1381.1998.

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The recently developed ESP Culture System II (AccuMed, Chicago, Ill.) was compared with radiometric BACTEC 460TB (Becton Dickinson, Towson, Md.) and with Lowenstein-Jensen medium for recovery of mycobacteria from over 2,500 clinical specimens both of respiratory and nonrespiratory origin, including blood. The majority of the 219 mycobacterial isolates (129) belonged to the Mycobacterium tuberculosis complex, followed by 37 isolates of theMycobacterium avium complex (MAC) and 53 isolates of eight other mycobacterial species. Rates of recovery obtained with BACTEC, ESP, and Lowenstein-Jensen medium were 89, 79, and 64%, respectively, with such differences being statistically significant. Different media and systems appeared to behave differently when the more frequently detected organisms were considered: M. tuberculosis complex isolates grew better with BACTEC, and MAC isolates grew better with ESP. An analysis of the combinations of Lowenstein-Jensen medium with BACTEC and with ESP did not reveal significant differences in recovery rates. With regard to the times needed for the detection of positive cultures, they were significantly longer on Lowenstein-Jensen medium (average, 28 days) than with the remaining two systems, between which there was no difference (average, 18 days). We conclude, therefore, that the ESP system, when used in combination with a solid medium, performs as well as the thoroughly validated radiometric BACTEC system and offers the advantages of full automation and absence of radioisotopes.

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Tortoli, Enrico, Paola Cichero, Claudio Piersimoni, M. Tullia Simonetti, Giampietro Gesu, and Domenico Nista. "Use of BACTEC MGIT 960 for Recovery of Mycobacteria from Clinical Specimens: Multicenter Study." Journal of Clinical Microbiology 37, no. 11 (1999): 3578–82. http://dx.doi.org/10.1128/jcm.37.11.3578-3582.1999.

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The BACTEC MGIT 960 instrument is a fully automated system that exploits the fluorescence of an oxygen sensor to detect growth of mycobacteria in culture. Its performance was compared to those of the radiometric BACTEC 460 instrument and egg-based Lowenstein-Jensen medium. An identical volume of sample was inoculated in different media, and incubation was carried out for 6 weeks with the automatic systems and for 8 weeks on solid media. A total of 2,567 specimens obtained from 1,631 patients were cultured in parallel. Mycobacteria belonging to nine different taxa were isolated by at least one of the culture systems, with 75% of them being represented byMycobacterium tuberculosis complex. The best yield was obtained with the BACTEC 460 system, with 201 isolates, in comparison with 190 isolates with the BACTEC MGIT 960 system and 168 isolates with Lowenstein-Jensen medium. A similar but not significant difference was obtained when the most-represented organisms, the M. tuberculosis complex, Mycobacterium xenopi, and theMycobacterium avium complex, were analyzed separately and when combinations of a solid medium with the BACTEC MGIT 960 system and with the BACTEC 460 system were considered. The shortest times to detection were obtained with the BACTEC MGIT 960 system (13.3 days); 1.5 days earlier than that with the BACTEC 460 system (14.8 days) and 12 days earlier than that with Lowenstein-Jensen medium (25.6 days). The BACTEC MGIT 960 system had a contamination rate of 10.0%, intermediate between those of the radiometric system (3.7%) and the egg-based medium (17.0%). We conclude, therefore, that the BACTEC MGIT 960 system is a fully automated, nonradiometric instrument that is suitable for the detection of growth of tuberculous and other mycobacterial species and that is characterized by detection times that are even shorter than that of the “gold standard,” the BACTEC 460 system. The contamination rate was higher than that for the radiometric BACTEC 460 system and needs to be improved.

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Pyka, K. "DETECTION OF ORTHOIMAGE MOSAICKING SEAMLINES BY MEANS OF WAVELET TRANSFORM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 10, 2016): 45–50. http://dx.doi.org/10.5194/isprsarchives-xli-b4-45-2016.

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The detection of orthoimage mosaicking seamlines by means of wavelet transform was examined. Radiometric alignment was omitted, giving priority to the issue of seamlines which bypass locations where there is a parallax between orthoimages. The importance of this issue is particularly relevant for images with very high resolution. In order to create a barrier image between orthoimages, the redundant wavelet transform variant known as MODWT-MRA was used. While more computationally complex than the frequently used DWT, it enables very good multiresolution edge detection. An IT prototype was developed on the basis of the described concept, and several cases of seamline detection were tested on the basis of data with a resolution of 10 cm to 1 m. The correct seamline location was obtained for each test case. This result opens the door to future expansion of the radiometric alignment method, which is also based on wavelets.

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Pyka, K. "DETECTION OF ORTHOIMAGE MOSAICKING SEAMLINES BY MEANS OF WAVELET TRANSFORM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 10, 2016): 45–50. http://dx.doi.org/10.5194/isprs-archives-xli-b4-45-2016.

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The detection of orthoimage mosaicking seamlines by means of wavelet transform was examined. Radiometric alignment was omitted, giving priority to the issue of seamlines which bypass locations where there is a parallax between orthoimages. The importance of this issue is particularly relevant for images with very high resolution. In order to create a barrier image between orthoimages, the redundant wavelet transform variant known as MODWT-MRA was used. While more computationally complex than the frequently used DWT, it enables very good multiresolution edge detection. An IT prototype was developed on the basis of the described concept, and several cases of seamline detection were tested on the basis of data with a resolution of 10 cm to 1 m. The correct seamline location was obtained for each test case. This result opens the door to future expansion of the radiometric alignment method, which is also based on wavelets.

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Knupp, K. R., T. Coleman, D. Phillips, R. Ware, D. Cimini, F. Vandenberghe, J. Vivekanandan, and E. Westwater. "Ground-Based Passive Microwave Profiling during Dynamic Weather Conditions." Journal of Atmospheric and Oceanic Technology 26, no. 6 (June 1, 2009): 1057–73. http://dx.doi.org/10.1175/2008jtecha1150.1.

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Abstract Short-period (1–5 min) temperature and humidity soundings up to 10-km height are retrieved from ground-based 12-channel microwave radiometer profiler (MWRP) observations. In contrast to radiosondes, the radiometric retrievals provide very high temporal resolution (1 min or less) of thermodynamic profiles, but the vertical resolution, which declines in proportion to the height above ground level, is lower. The high temporal resolution is able to resolve detailed meso-γ-scale thermodynamic and limited microphysical features of various rapidly changing mesoscale and/or hazardous weather phenomena. To illustrate the MWRP capabilities and potential benefits to research and operational activities, the authors present example radiometric retrievals from a variety of dynamic weather phenomena including upslope supercooled fog, snowfall, a complex cold front, a nocturnal bore, and a squall line accompanied by a wake low and other rapid variations in low-level water vapor and temperature.

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Depalmas, Anna. "New Data from Fortified Coastal Settlement of Cap de Forma, Mahon, Menorca (Balearic Islands)." Radiocarbon 56, no. 2 (2014): 425–37. http://dx.doi.org/10.2458/56.17169.

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This article presents new radiometric data from archaeological layers of the inhabited structures adjacent to the cyclopean monument of Cap de Forma (Mahon, Menorca). The archaeological site is located on a narrow isthmus that links a 30-m-high coastal promontory to the mainland. It is next to an excellent natural harbor on the south coast of the island. The protohistorical complex consists of a cyclopean monument surrounded by a necropolis of rock-cut tombs (cuevas) that are dug into the cliff. The monument is an atypical example of Talayotic architecture. The excavations carried out since 1997 have discovered three living spaces. These lean against the southern wall of the cyclopean structure. The artifacts are almost all pan of a chronological horizon that corresponds to the beginning of the Talayotic period. This study uses radiometric data to help interpret the recent findings from the three living spaces that flank the wall of the central monument.

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Depalmas, Anna. "New Data from Fortified Coastal Settlement of Cap de Forma, Mahon, Menorca (Balearic Islands)." Radiocarbon 56, no. 02 (2014): 425–37. http://dx.doi.org/10.1017/s0033822200049481.

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This article presents new radiometric data from archaeological layers of the inhabited structures adjacent to the cyclopean monument of Cap de Forma (Mahon, Menorca). The archaeological site is located on a narrow isthmus that links a 30-m-high coastal promontory to the mainland. It is next to an excellent natural harbor on the south coast of the island. The protohistorical complex consists of a cyclopean monument surrounded by a necropolis of rock-cut tombs (cuevas) that are dug into the cliff. The monument is an atypical example of Talayotic architecture. The excavations carried out since 1997 have discovered three living spaces. These lean against the southern wall of the cyclopean structure. The artifacts are almost all pan of a chronological horizon that corresponds to the beginning of the Talayotic period. This study uses radiometric data to help interpret the recent findings from the three living spaces that flank the wall of the central monument.

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Aisabokhae, Joseph, and Moses Adeoye. "Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria." Geology, Geophysics and Environment 46, no. 3 (January 19, 2021): 238. http://dx.doi.org/10.7494/geol.2020.46.3.238.

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The area which transcends the Precambrian basement complex onto the Sokoto sector of the Iullemme-den basin in northwestern Nigeria presents a unique prospect for geothermal exploration research in the absence of regional heat production data, despite its tectonic history and depositional characteristics. In this study, geophysical exploration employing radiometric technique was adopted to classify the petrologic units within the fringes of the Iullemmeden basin and the adjoining crystalline basement complex so as to estimate the radiogenic heat potential within the terrain that may support geothermal considerations. Airborne radiometric measurements acquired over the area were digitized and processed to obtain radioelement concentration maps and the K/Th/U ternary map. Results show that the ranges of measured concentrations of 40K, 238U and 232Th are 4.6 to 18.9%, 0.7 to 4.9 ppm and 4.6 to 18.9 ppm respectively. Radiogenic heat estimation derived from radioelement data within eight petrologic units comprising quaternary sediments, schist, carbonates, shale/clay, younger granites, older granites, gneissic rock and migmatite showed that the lowest radiogenic heat production estimates ranging from 0.27–0.66 μW∙m−3 were recorded in the sedimentary terrain within the quaternary sediments while the highest radiogenic heat production values of between 2.04 to 2.34 μW∙m−3 were recorded in the basement com-plex within gneissic rocks. The spatial distribution of radiogenic heat in the area showed an increased heat gradient within the basement complex and a diminishing heat gradient over the Iullemmeded basin.

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Kirihara, J. M., S. L. Hillier, and M. B. Coyle. "Improved detection times for Mycobacterium avium complex and Mycobacterium tuberculosis with the BACTEC radiometric system." Journal of Clinical Microbiology 22, no. 5 (1985): 841–45. http://dx.doi.org/10.1128/jcm.22.5.841-845.1985.

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Goh, K. S., and N. Rastogi. "Rapid preliminary differentiation of species within the Mycobacterium tuberculosis complex: proposition of a radiometric method." Research in Microbiology 142, no. 6 (January 1991): 659–65. http://dx.doi.org/10.1016/0923-2508(91)90079-p.

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Kjærgaard, M., C. Knudsen, and N. Abrahamsen. "Geophysical investigations of the Qaqarssuk Carbonatite Complex, southern West Greenland." Rapport Grønlands Geologiske Undersøgelse 135 (December 31, 1987): 25–35. http://dx.doi.org/10.34194/rapggu.v135.7994.

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During the summers of 1984 and 1985, geophysical investigations were made in the Qaqarssuk area, situated 65°23'N, 51°40'W, in connection with exploration for phosphorus, niobium and lanthanide deposits of potential economic interest. The geophysical field work carried out in the summer of 1984 has previously been briefly discussed (Kjærgaard & Olsen, 1985a). Most of the interpretations have now been completed, some of which are presented below, together with the new results from 1985. The investigations focussed on three subjects: (1) Shallow seismic and geoelectric measurements to map the thickness of residual soil (possibly enriched in P and Nb) overlying the carbonatite. (2) Radiometric meaSurements to localise pyrochlore-rich (V bearing) and lanthanide-rich carbonatites (Th bearing). (3) Magnetic investigations, primarily to map the structures in the carbonatite. A general description of the geology of the complex is given in Knudsen (1985) and Knudsen (1986). A geological sketch map is shown in fig. 1.

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Journal articles on the topic 'Radiometric complex'

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