ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (631,685)
  • 2020-2024  (40,916)
  • 1965-1969  (590,769)
Collection
Language
Years
Year
Journal
  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 294 (1992), S. 466-478 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 317 (1993), S. 474-484 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2024
    Description: 〈p〉〈em〉〈span〉This study delves into the management of electronic waste (e-waste) stemming from the disposal of personal electronic items and mobile phones, primarily in response to the remarkable surge in the utilization of these devices within the Hassan city populace in recent years. The principal objectives revolved around investigating the existing disposal methods for electronic devices including mobile phones and collecting fundamental data concerning their disposal practices within the geographical confines of Hassan city of Karnataka State. Additionally, an endeavor was undertaken to gauge the level of awareness among respondents regarding the potential hazards posed by e-waste. It was observed that a significant proportion of the Hassan population typically retains especially electronic devices is cell phones, once these devices become outdated and obsolete. Among the prevalent disposal methods, the most widespread approach involves selling these gadgets to scrap dealers or junk shops, whereas recycling practices remain relatively underutilized. Notably, a mere minority of individuals engage in recycling activities. An intriguing revelation emerged, with 65% of respondents expressing concern about the adverse repercussions of improper e-waste disposal on human health and the environment. Astonishingly, all respondents admitted to having no knowledge of the fate of their discarded electronic devices. Based on the findings gleaned from this survey, it is strongly recommended that a comprehensive review be conducted on the overarching management of e-waste stemming from this electronic waste including mobile phones, gadgets in the Hassan city of Karnataka State. The purpose of these surveys and data collection endeavors is to approximate the volume of e-waste generated through the disposal of these devices. This information is envisioned to assist stakeholders and government agencies in formulating effective and efficient legislation and policies for the proficient management of e-waste〈/span〉〈/em〉〈/p〉
    Print ISSN: 2321-421X
    Electronic ISSN: 2230-7990
    Topics: Geography , Geosciences
    Published by STM Journals
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2024
    Description: 〈p〉〈em〉Indian Railroads is one of the largest railroad systems in the World. The Indian railway system has grown significantly over the years, as seen by the massive construction of its railroads; nonetheless, some accidents are caused by fractures in the railway track. Splits may occur because of the track's expansion or contraction brought on by seasonal variations. This study proposes a crack monitoring vehicle that employs an ultrasonic sensor to detect fractures on railway tracks and uses an Arduino Uno to facilitate the GSM and GPS module to send an SMS to the testing station, thereby mitigating the problems caused by these cracks. This intelligent system works like a remote monitoring system which gives an alert to stop the passage of trains in that path. The proposed model involves the use of Arduino, ultrasonic sensor, buzzer, GSM module, and GPS module.〈/em〉〈/p〉
    Print ISSN: 2321-421X
    Electronic ISSN: 2230-7990
    Topics: Geography , Geosciences
    Published by STM Journals
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2024
    Description: The applicability of the Gravity Recovery and Climate Experiment (GRACE) level 1B range-rate data for detecting gravity changes under the influence of strong earthquakes (M6.0-6.9) has been investigated. The most common product of the GRACE mission is the level 2, science data, as the spherical harmonic Stokes’ coefficients of the geopotential. These coefficients have been generated from Level 1B data which has resulted in missing some information during the smoothing process. In this study, the GRACE level 1B K-band range-rate measurements over three selected cells in Iran were analyzed, including two cells containing the epicenters of the Boroujerd earthquake (6.1 Mw) and the Zarand earthquake (6.4 Mw), which occurred on March 31, 2006, and February 22, 2005, respectively, and one cell far enough from those two cells. Additionally, the range-rate time series attributed to Iran's main catchments containing the above-mentioned zones have been extracted to distinguish between the effects of earthquakes and hydrology on the range-rate time series. Besides, the impact of factors other than earthquakes such as tide and non-gravitational accelerations acting on the GRACE satellites has been corrected. To better explore the extracted signals, their details have been derived using the wavelet transforms and the corresponding anomalies have been detected using the boxplot method. The considerable anomalies that have been observed in areas within or close to the earthquakes' epicenters before and after the earthquakes indicate that the GRACE and GRACE Follow-On range-rate time series can be considered as one of the potential precursors of a strong earthquake.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2024
    Description: سپیدایی از فراسنجﻫﺎی کلیدی در ﻣﻄﺎﻟﻌﺎت آب و ﻫﻮاﻳﻲ ﻣﻲﺑﺎﺷﺪ. بررسی آب و هواشناسی سپیدایی می‌تواند ابزاری برای شناخت تغییرات محیطی باشد. ﺳﻨﺠﻨﺪه مودیس سپیدایی سطح زﻣﻴﻦ را ﺑﻄﻮر ﻣﺴﺘﻤﺮ در ﻣﻘﻴﺎﺳﻲ ﺟﻬﺎﻧﻲ و ﺑﺎ ﻗﺪرت ﺗﻔﻜﻴﻚ ﻣﻜﺎﻧﻲ مناسب ﺗﻮﻟﻴﺪ و در دسترس پژوهشگران ﻗﺮار می‌دهد. در این پژوهش جهتِ واکاوی آب و هواشناسی سپیدایی ایران‌، نخست داده‌های فراورده MCD43A4 سنجنده مودیس در محدوده ایران در بازه زمانی 1/1/2001 تا 30/12/2021 با تفکیک مکانی 500 متری و تفکیک زمانی روزانه از وبگاه ناسا برداشت شد. پس از پیش پردازش‌های لازم، میانگین بلندمدت ماهانه، فصلی و سالانه سپیدایی ایران محاسبه گردید. یافته‌ها در مقیاس ماهانه نشان داد که در ماه‌های سرد سال( Jan, Feb, Mar ) که ماه‌های برفپوش ایران شناخته می‌شوند، سپیدایی ایران بیشینه شده و ماه‌های گذار فروکش کرده و سپس در ماه‌های گرم سال (June, July, Aug) به سبب خشکی زمین و افزایش دمای رویه زمین دوباره افزایش می‌یابد. این رفتار دو سویه در مقیاس فصلی نیز آشکار است. بطوری که سپیدایی ایران در فصول زمستان و تابستان بیشینه و در فصول بهار و پاییز (فصول گذار) کمینه می‌باشد. همچنین یافته‌ها گویای آن است که میانگین بلندمدت سپیدایی ایران حدود 5/12 درصد است. با آگاهی از محدود بودن پوشش برفی ایران، پایین بودن سپیدایی ایران طبیعی به نظر می‌رسد.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2024
    Description: Evaluating the susceptibility of regional climates to climate change gives a pattern to realistically analyze the probable future climate changes. This paper investigates human influence on variations in precipitation extremes in Iran by evaluating precipitation data provided from 286 rain-gage stations during 1967-2010 and general circulation simulation results of CanESM2 model. This investigation was based on six forcing factors including natural external (volcanic aerosol, solar radiation), anthropogenic and a combination of them, Green House Gases (GHGs), change of land use, and anthropogenic aerosols. Seven precipitation indices namely Rx1day (Annual maximum 1-day precipitation), Rx5day (Annual maximum 5-day precipitation), R10mm (Annual count of days where daily precipitation is more than 10 mm), R20mm (Annual count of days where daily precipitation is more than 20 mm), CDD (Consecutive dry days), CWD (Consecutive wet days), and PRCPTOT (Annual total wet day precipitation) have been analyzed via the optimal fingerprint method. The results revealed that Rx1day, Rx5day and CWD increased, while R10mm, R20mm, CDD, and PRCPTOT decreased among which CDD and Rx1day indices with values of 18.4% and 10.9%, respectively showed significant variations. Furthermore, the obtained results implied that only the effect of anthropogenic forcing with a value of 1.4 was detected and attributed in CDD variations, also ANT caused increase in the return period of a 20-year event by 1.9 year for CDD. Although human-induced forcing factors presented marked trends in some cases, their effects were not generally detected and attributed on the change in the observations, apart from one exception.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2024
    Description: گردوخاک پدیده هواشناسی رایج در مناطق خشک و نیمه خشک جهان است که در اثر عوامل طبیعی یا انسانی ایجاد می‌شود. شناسایی چشمه‌های فعال گردوخاک نخستین گام برای مقابله با آن و کاهش پیامدهای مخرب آن است. برای این منظور از دو شاخص عمق نوری هواویزها (AOD) و اختلاف بهنجار شده پوشش گیاهی (NDVI) از سنجنده MODIS ماهواره Terra برای دو دهه گذشته (2020-2001) استفاده شده است. برای بررسی چشمه‌های فعال هواویز در منطقه مورد مطالعه درصد فراوانی آستانه‌های هواویزها با سه آستانه 0.3، 0.5و 1 مورد بررسی قرار گرفت. بیشینه مقادیر AOD مربوط به فصول بهار و تابستان است. بطور کلی شش کانون اصلی هواویزها بر اساس مقادیر AOD و شاخص FoO برای منطقه غرب آسیا قابل تشخیص است. این کانون‌های هواویز در پهنه اقلیمی بیابانی گرم و خشک (BWh) دیده می‌شوند. تنها کانون هووایز موثر در شمال شرقی ایران در پهنه اقلیمی بیابانی خشک و سرد (BWk) در کشور ترکمنستان قرار دارد. بررسی ماتریس ضریب همبستگی هواویزها با پوشش گیاهی نشان ازرابطه معکوس دارد، البته این رابطه بیشتر برای چشمه‌های هواویزها صادق است. فارغ از نقش تعیین کننده ویژگی‌های سطحی در رخداد هواویزها، دو پدیده هواشناسی همانند باد شمال تابستانه و باد 120 روزه سیستان در تشکیل کانون‌هایی با مقادیر AOD بالاتر 0.5 و 1 نقش تعیین کننده‌‌ای دارند.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2024
    Description: بازتابسنجی تداخلی GNSS را میتوان بعنوان یکی دیگر از روشهای سنجش از دور برای پایش رطوبت خاک بصورت پیوسته و البته در مقیاس محلی در نظر گرفت که در وضعیتهای مختلف جوی مانند شرایط بارانی و مه آلود و در شرایط متفاوت نور و روشنایی مانند روز و شب قابل اجرا است. سیگنالهای بازتابی از سطح زمین توسط آنتنهای GNSS قابل دریافت است. تغییرات در رطوبت خاک باعث تغییر در مقدار مؤلفه نسبت سیگنال به نویز SNRسیگنال‌های بازتابی میشود. با تجزیه و تحلیل سیگنالهای بازتابی، میتوان به اطلاعات مفیدی در مورد سطح بازتاب دست یافت. SNR به شدت به رطوبت خاک وابسته است. در این تحقیق داده های ایستگاه P038 در منطقه نیومکزیکو مورد استفاده قرار میگیرد. بدینصورت که از سیگنالهای چندمسیری برای برآورد تغییرات رطوبت خاک در طول چهار سال، از 2017 تا 2020 استفاده میشود. طبق برآورد انجام شده سطح محتوای حجمی آب در سال 2017، برابر 8/88 میباشد، که در سال 2018 به 11/74 افزایش مییابد. سپس اندکی کاهش یافته و در سال 2019 به 10/88 رسیده و نهایتاً در سال 2020 به 12/49 افزایش مییابد. در این مقاله کارائی مدل شبکه عصبی LSTM در پیش بینی سری زمانی رطوبت حجمی خاک بدست آمده از تداخل سیگنالهای بازتابی GNSS مورد ارزیابی قرار می‌گیرد. آموزش مدل با استفاده از 80 درصد مشاهدات ایستگاه انجام میگیرد. با به روزرسانی وضعیت شبکه با مقادیر مشاهده شده به جای مقادیر پیش بینی شده، مقدار جذر خطای مربعی میانگین از 0/09 به 0/04 کاهش یافته و پیش بینی ها دقیقتر انجام میشوند.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2024
    Description: Abstract Subsurface channels are stratigraphic features in seismic data that can act as reservoirs or conduits for hydrocarbons. However, detecting and characterizing these channels is challenging due to the limitations of seismic resolution and the complexity of the subsurface geology. Seismic inversion is a technique that can enhance the seismic data by transforming the seismic traces into quantitative estimates such as acoustic impedance (AI), which is a key reservoir rock property. AI inversion can help to identify and delineate the subsurface channels by providing more contrast and detail of the channel geometry, fill, and surrounding sediments. Seismic inversion is often challenged by the non-uniqueness, ambiguity, and uncertainty of the inversion results due to noise and band-limited data. This paper uses a fuzzy model-based seismic inversion method that integrates prior information and fuzzy clustering constraints to produce more realistic and reliable AI models. This method assigns data points to multiple clusters with varying degrees of membership, which can capture the overlapping of AI values of different geological formations. The method is applied to the 3D Poseidon seismic data from the Browse Basin, offshore Western Australia, and the results are compared with those of conventional model-based inversion. Since there is no well-data in an interest channel zone, a qualitative evaluation with seismic attributes is performed. The subsurface structures are further interpreted by various seismic attributes. The comparison shows the fuzzy model-based inversion method can improve the resolution, contrast, and stability of the AI models and reveal more detail of the subsurface geology.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...