cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57760/sciencedb.07533
title: On-chip tunable microdisk laser fabricated on Er3+-doped lithium niobate on insulator
title: On-chip tunable microdisk laser fabricated on Er3+-doped lithium niobate on insulator

description: We demonstrate a C-band wavelength-tunable microlaser with an Er3+-doped high quality (∼1.8×106) lithium niobate microdisk resonator. With a 976 nm continuous-wave pump laser, lasing action can be observed at a pump power threshold lower than 400 µW at room temperature. Furthermore, the microdisk laser wavelength can be tuned by varying the pump laser power, showing a tuning efficiency of∼−17.03pm/mW at low pump power below 13 mW, and 10.58 pm/mW at high pump power above 13 mW.
description: We demonstrate a C-band wavelength-tunable microlaser with an Er3+-doped high quality (∼1.8×106) lithium niobate microdisk resonator. With a 976 nm continuous-wave pump laser, lasing action can be observed at a pump power threshold lower than 400 µW at room temperature. Furthermore, the microdisk laser wavelength can be tuned by varying the pump laser power, showing a tuning efficiency of∼−17.03pm/mW at low pump power below 13 mW, and 10.58 pm/mW at high pump power above 13 mW.
DOI: 10.57760/sciencedb.j00124.00008
title: Preparation of dimethyl carbonate from methanol and propylene carbonate over Ca-Zr catalyst modified by transition metals
title: 过渡金属助剂改性Ca-Zr催化剂上甲醇与碳酸丙烯酯制备碳酸二甲酯的研究

description: The main elements included in the data set were standard curve data for the internal standard method of product analysis, catalyst performance evaluation data, and catalyst characterisation results data. The process generated was the modification of calcium-zirconium catalysts with different types of transition metals and their application to the reaction of methanol and propylene carbonate ester exchange for the preparation of dimethyl carbonate, the evaluation of catalyst activity using a three-necked flask with a serpentine condenser, the analysis of reaction products using the internal standard method, the characterisation of catalysts using XRD, FT-IR, BET, XPS, CO2-TPD and other characterisation tools. The catalysts were characterised to correlate the catalyst activity with the physicochemical properties of the catalysts and to propose conformational relationships to further guide the development of efficient catalysts.
description: The main elements included in the data set were standard curve data for the internal standard method of product analysis, catalyst performance evaluation data, and catalyst characterisation results data. The process generated was the modification of calcium-zirconium catalysts with different types of transition metals and their application to the reaction of methanol and propylene carbonate ester exchange for the preparation of dimethyl carbonate, the evaluation of catalyst activity using a three-necked flask with a serpentine condenser, the analysis of reaction products using the internal standard method, the characterisation of catalysts using XRD, FT-IR, BET, XPS, CO2-TPD and other characterisation tools. The catalysts were characterised to correlate the catalyst activity with the physicochemical properties of the catalysts and to propose conformational relationships to further guide the development of efficient catalysts.
DOI: 10.57760/sciencedb.o00119.00057
title: A dataset of water, heat, and carbon fluxes of an oasis agroecosystem in the middle areas of the Hexi Corridor (2012–2015)
title: 2012-2015年河西走廊中部绿洲农田生态系统水热碳通量观测数据集

description: The dataset consists of two subsets: half-hourly fluxes determined by the eddy covariance method (i.e., sensible heat flux, latent heat flux, and CO2 flux, etc.) and auxiliary micrometeorological variables (i.e., surface net radiation, soil heat flux, air temperature, humidity, wind speed, soil temperature, soil moisture, etc.) during the period of 2012-2015 in an agroecosystem located in the middle areas of the Hexi Corridor, northwest China. The experimental observation campaign was carried out by the Linze Inland River Basin Research Station, one of the China Flux Observation and Research Network (ChinaFLUX).
description: The dataset consists of two subsets: half-hourly fluxes determined by the eddy covariance method (i.e., sensible heat flux, latent heat flux, and CO2 flux, etc.) and auxiliary micrometeorological variables (i.e., surface net radiation, soil heat flux, air temperature, humidity, wind speed, soil temperature, soil moisture, etc.) during the period of 2012-2015 in an agroecosystem located in the middle areas of the Hexi Corridor, northwest China. The experimental observation campaign was carried out by the Linze Inland River Basin Research Station, one of the China Flux Observation and Research Network (ChinaFLUX).
DOI: 10.15468/dl.vb4m2a
title: Occurrence Download

description: A dataset containing 695 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "OccurrenceStatus is Present",
 "TaxonKey is Rheohyla miotympanum (Cope, 1863)",
 "Year 1970-2025"
 ]
}

 The dataset includes 695 records from 40 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000552-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.57760/sciencedb.06807
title: Laser heat-mode patterning with improved aspect-ratio
title: Laser heat-mode patterning with improved aspect-ratio

description: Heat-mode lithography has received much attention owing to its capacity of breaking through the diffraction limit and realizing nano-patterning. However, the relatively lower aspect ratio of patterns seriously limits its scope of applications. In the currently available literature, the aspect ratio of submicron structures prepared by this method is less than 0.3:1. In this work, a new two-step development process was proposed to considerably improve the aspect-ratio of micro/nanostructures in the AgInSbTe (AIST) heat-mode resist. An aspect ratio of 1:1 can be kept even for the grating structures with a linewidth/period of 200nm/400nm. The developed patterns can be transferred to silicon substrates with high fidelity. This simple and effective technique addresses key issues of heat-mode lithography in the manufacture of functional nanostructures requiring high aspect ratio, such as photomasks, templets of nanoimprint, and so on. 
description: Heat-mode lithography has received much attention owing to its capacity of breaking through the diffraction limit and realizing nano-patterning. However, the relatively lower aspect ratio of patterns seriously limits its scope of applications. In the currently available literature, the aspect ratio of submicron structures prepared by this method is less than 0.3:1. In this work, a new two-step development process was proposed to considerably improve the aspect-ratio of micro/nanostructures in the AgInSbTe (AIST) heat-mode resist. An aspect ratio of 1:1 can be kept even for the grating structures with a linewidth/period of 200nm/400nm. The developed patterns can be transferred to silicon substrates with high fidelity. This simple and effective technique addresses key issues of heat-mode lithography in the manufacture of functional nanostructures requiring high aspect ratio, such as photomasks, templets of nanoimprint, and so on.
DOI: 10.57760/sciencedb.06809
title: Optical vortex switch based on multiplexed volume gratings with high diffraction efficiency
title: Optical vortex switch based on multiplexed volume gratings with high diffraction efficiency

description: Systems of controllable orbital angular momentum (OAM) require more compact, higher conversion efficiency, more tolerable wavelength or polarization. We introduce an optical vortex switch based on a multiplexed volume grating (MVG). The MVG recorded in a piece of photo-thermo-refractive (PTR) glass exhibits high diffraction efficiency (DE, also known as conversion efficiency in transporting), sensitive angular selectivity, and polarization-insensitive. The effects of the incident divergence angle and polarization on the DE and the far-field diffraction profiles are demonstrated and investigated. It turns out that the divergence angle of the probe beam can greatly affect the DE. The fluctuation of the DE caused by polarization variation is less than 1.59%. This switch can be potentially applied in vortex tweezers, optical communication, and high power systems.
description: Systems of controllable orbital angular momentum (OAM) require more compact, higher conversion efficiency, more tolerable wavelength or polarization. We introduce an optical vortex switch based on a multiplexed volume grating (MVG). The MVG recorded in a piece of photo-thermo-refractive (PTR) glass exhibits high diffraction efficiency (DE, also known as conversion efficiency in transporting), sensitive angular selectivity, and polarization-insensitive. The effects of the incident divergence angle and polarization on the DE and the far-field diffraction profiles are demonstrated and investigated. It turns out that the divergence angle of the probe beam can greatly affect the DE. The fluctuation of the DE caused by polarization variation is less than 1.59%. This switch can be potentially applied in vortex tweezers, optical communication, and high power systems.
DOI: 10.57760/sciencedb.06815
title: Single and multiple pulse pattern formation in all-normal all-PM Yb-doped fiber laser using a nonlinear optical loop mirror
title: Single and multiple pulse pattern formation in all-normal all-PM Yb-doped fiber laser using a nonlinear optical loop mirror

description: We report the evolution of single-pulse and multi-pulse in a mode-locked all polarization-maintaining fiber laser based on a nonlinear optical loop mirror (NOLM). The main parameters of the laser were determined by numerically simulating the relationship between the number of pulses and the basic parameters of each element. Experiments demonstrate generation of 1 to 6 pulses per cavity round trip. There is an unstable regime between the stable N and N+1 pulses states when gradually increasing the pump power, while the intervals of the unstable regime shrink or even disappear when the direction of pump power variation is reversed. Our experimental results are different from those previously reported where the intervals of the unstable pulse regime are almost unchanged regardless of the pump power adjustment direction. We also describe how to obtain fundamental mode-locking from the multi-pulse state. The laser operated in the single-pulse regime shows excellent stability.
description: We report the evolution of single-pulse and multi-pulse in a mode-locked all polarization-maintaining fiber laser based on a nonlinear optical loop mirror (NOLM). The main parameters of the laser were determined by numerically simulating the relationship between the number of pulses and the basic parameters of each element. Experiments demonstrate generation of 1 to 6 pulses per cavity round trip. There is an unstable regime between the stable N and N+1 pulses states when gradually increasing the pump power, while the intervals of the unstable regime shrink or even disappear when the direction of pump power variation is reversed. Our experimental results are different from those previously reported where the intervals of the unstable pulse regime are almost unchanged regardless of the pump power adjustment direction. We also describe how to obtain fundamental mode-locking from the multi-pulse state. The laser operated in the single-pulse regime shows excellent stability.
DOI: 10.57760/sciencedb.06817
title: The Effect of Patriotic Feelings on Resilience of College Students: A Randomized Controlled Trail
title: 爱国情感对大学生心理弹性的促进作用：一项随机对照实验研究

description: Select4patriotic videos and4naturalsceneryvideosonavideowebsite. Before the official experiment, 20 psychology college students were invited to rate the patriotic emotional intensity of these videos, as well as the intensity of two typical basic emotions (happiness and sadness), on a 7-point scale (1 = very weak, 7 = very strong).
description: Select4patriotic videos and4naturalsceneryvideosonavideowebsite. Before the official experiment, 20 psychology college students were invited to rate the patriotic emotional intensity of these videos, as well as the intensity of two typical basic emotions (happiness and sadness), on a 7-point scale (1 = very weak, 7 = very strong).
DOI: 10.5281/zenodo.14760858
title: Ultrasound Images of the Temporomandibular Joint with Segmentations

description: This dataset consists of 142 high-resolution ultrasound images of the temporomandibular joint (TMJ), annotated to segment three key anatomical structures: the mandibular condyle, joint space, and glenoid fossa. The images were acquired using a GE Versana Premier ultrasound system with an 8–18 MHz hockey stick probe. Patients were scanned in a relaxed, supine position, ensuring accurate representation of the joint in habitual occlusion. Each image was preprocessed by cropping to the diagnostic field of view and saved in 8-bit grayscale format. The dataset is divided into 107 training images and 35 test images, making it suitable for machine learning applications in medical imaging and TMJ analysis.

Please cite the following articles, if you are using this dataset:

Lasek, J.; Nurzynska, K.; Piórkowski, A.; Strzelecki, M.; Obuchowicz, R. Deep Learning for Ultrasonographic Assessment of Temporomandibular Joint Morphology. Tomography 2025, 11, x. https://doi.org/10.3390/tomography11030027
DOI: 10.5281/zenodo.14760859
title: Ultrasound Images of the Temporomandibular Joint with Segmentations

description: This dataset consists of 142 high-resolution ultrasound images of the temporomandibular joint (TMJ), annotated to segment three key anatomical structures: the mandibular condyle, joint space, and glenoid fossa. The images were acquired using a GE Versana Premier ultrasound system with an 8–18 MHz hockey stick probe. Patients were scanned in a relaxed, supine position, ensuring accurate representation of the joint in habitual occlusion. Each image was preprocessed by cropping to the diagnostic field of view and saved in 8-bit grayscale format. The dataset is divided into 107 training images and 35 test images, making it suitable for machine learning applications in medical imaging and TMJ analysis.

Please cite the following articles, if you are using this dataset:

Lasek, J.; Nurzynska, K.; Piórkowski, A.; Strzelecki, M.; Obuchowicz, R. Deep Learning for Ultrasonographic Assessment of Temporomandibular Joint Morphology. Tomography 2025, 11, x. https://doi.org/10.3390/tomography11030027
DOI: 10.57760/sciencedb.06821
title: 2021 Land use classification data set of typical urban core areas in Northern China
title: 中国北方典型城市核心区2021年土地利用分类数据集

description: The high-resolution satellite remote sensing images of the core built-up areas of the four typical cities in northern China, Handan, Shijiazhuang, Tangshan and Xingtai of Hebei Province, are the data sets. The land use classification data sets of the core areas of typical cities in northern China are established by combining visual interpretation and interactive interpretation using the convolutional neural network framework EfficientNet V2. It can provide basic data for land use classification and extraction.
description: The high-resolution satellite remote sensing images of the core built-up areas of the four typical cities in northern China, Handan, Shijiazhuang, Tangshan and Xingtai of Hebei Province, are the data sets. The land use classification data sets of the core areas of typical cities in northern China are established by combining visual interpretation and interactive interpretation using the convolutional neural network framework EfficientNet V2. It can provide basic data for land use classification and extraction.
DOI: 10.57760/sciencedb.07536
title: Manufacture of three-dimensional optofluidic spot-size con-verters in fused silica using hybrid laser microfabrication
title: Manufacture of three-dimensional optofluidic spot-size con-verters in fused silica using hybrid laser microfabrication

description: We propose a hybrid laser microfabrication approach for the manufacture of three-dimensional (3D) optofluidic spot-size converters in fused silica glass by a combination of femtosecond (fs) laser microfabrication and carbon dioxide laser irradiation. Spatially shaped fs laser-assisted chemical etching is first performed to form 3D hollow microchannels in glass, which are composed of embedded straight channels, tapered channels, and vertical channels connected with the glass surface. Then, carbon dioxide laser-induced thermal reflow is carried out for internal polishing of the whole microchannels and sealing parts of vertical channels. Finally, 3D optofluidic spot-size converters (SSC) are formed by filling a liquid-core waveguide solution into laser-polished microchannels. With a fabricated SSC structure, the mode spot size of the optofluidic waveguide can be expanded from ~8 μm to ~23 μm with a conversion efficiency of ~84.1%. Further measurement of the waveguide-to-waveguide coupling devices in the glass showed that the total insertion loss of two symmetric SSC structures through two ~50 μm diameter coupling ports was only ~6.73 dB at 1310 nm, which is about half of non-SSC structures with diameters of ~9 μm at the same coupling distance. The proposed approach holds great potential for developing 3D novel fluid-based photonic devices for mode conversion, optical manipulation, and lab-on-a-chip sensing.
description: We propose a hybrid laser microfabrication approach for the manufacture of three-dimensional (3D) optofluidic spot-size converters in fused silica glass by a combination of femtosecond (fs) laser microfabrication and carbon dioxide laser irradiation. Spatially shaped fs laser-assisted chemical etching is first performed to form 3D hollow microchannels in glass, which are composed of embedded straight channels, tapered channels, and vertical channels connected with the glass surface. Then, carbon dioxide laser-induced thermal reflow is carried out for internal polishing of the whole microchannels and sealing parts of vertical channels. Finally, 3D optofluidic spot-size converters (SSC) are formed by filling a liquid-core waveguide solution into laser-polished microchannels. With a fabricated SSC structure, the mode spot size of the optofluidic waveguide can be expanded from ~8 μm to ~23 μm with a conversion efficiency of ~84.1%. Further measurement of the waveguide-to-waveguide coupling devices in the glass showed that the total insertion loss of two symmetric SSC structures through two ~50 μm diameter coupling ports was only ~6.73 dB at 1310 nm, which is about half of non-SSC structures with diameters of ~9 μm at the same coupling distance. The proposed approach holds great potential for developing 3D novel fluid-based photonic devices for mode conversion, optical manipulation, and lab-on-a-chip sensing.
DOI: 10.15468/dl.2nvqpw
title: Occurrence Download

description: A dataset containing 7 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rhododendron dumicola Tagg & Forrest"
 ]
}

 The dataset includes 7 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000555-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.42fa57
title: Occurrence Download

description: A dataset containing 7 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "TaxonKey is Rhododendron boothii Nutt."
 ]
}

 The dataset includes 7 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000554-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.57760/sciencedb.06823
title: Terahertz Radiation Enhancement from Femtosecond Laser Ionized Air Micro-Plasma Under Static Electric Field
title: 静电场调制飞秒激光气体微等离子体的太赫兹辐射增强

description: Terahertz (THz) radition has attracted significant attention toward applications on such as biology, imaging, sensing and communications due to its unique characteristics. Femtosecond laser filamentation is one of the important approaches to obtain THz pulse with ultra-broad bandwidth and high electric field. With the rapid development of femtosecond laser technology, plasma based THz generation by femtosecond laser has been well studied. Two theoretical models have reported for understanding the physical mechanism of THz pulse generation, namely the photocurrent model and the four wave mixing model, respectively. By applying an external static electric field to the laser-induced plasmas filament, the enhancement of THz radiation has been reported by several orders of magnitude. However, the physical mechanism of laser-induced THz emission under the external static electric field remains unclear because of the complex interaction of laser plasmas. In this paper, based on the photocurrent model, we analyze and numerically simulate the properties of THz emissiom from a DC-biased single-color femtosecond laser ionized gas micro-plasma. The results show that the photocurrent model is effective in interpreting the THz generation of DC-biased laser-induced gas plasmas.
description: Terahertz (THz) radition has attracted significant attention toward applications on such as biology, imaging, sensing and communications due to its unique characteristics. Femtosecond laser filamentation is one of the important approaches to obtain THz pulse with ultra-broad bandwidth and high electric field. With the rapid development of femtosecond laser technology, plasma based THz generation by femtosecond laser has been well studied. Two theoretical models have reported for understanding the physical mechanism of THz pulse generation, namely the photocurrent model and the four wave mixing model, respectively. By applying an external static electric field to the laser-induced plasmas filament, the enhancement of THz radiation has been reported by several orders of magnitude. However, the physical mechanism of laser-induced THz emission under the external static electric field remains unclear because of the complex interaction of laser plasmas. In this paper, based on the photocurrent model, we analyze and numerically simulate the properties of THz emissiom from a DC-biased single-color femtosecond laser ionized gas micro-plasma. The results show that the photocurrent model is effective in interpreting the THz generation of DC-biased laser-induced gas plasmas.